| Oracle® Call Interface Programmer's Guide 11g Release 2 (11.2) Part Number E10646-08 |
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PDF · Mobi · ePub |
| Oracle® Call Interface Programmer's Guide 11g Release 2 (11.2) Part Number E10646-08 |
|
|
PDF · Mobi · ePub |
This appendix describes the attributes for OCI handles and descriptors, which can be read with OCIAttrGet(), and modified with OCIAttrSet().
This appendix contains these topics:
For each handle type, the attributes that can be read or changed are listed. Each attribute listing includes the following information:
The following modes are valid:
READ - The attribute can be read using OCIAttrGet().
WRITE - The attribute can be modified using OCIAttrSet().
READ/WRITE - The attribute can be read using OCIAttrGet(), and it can be modified using OCIAttrSet().
This is a description of the purpose of the attribute.
This is the data type of the attribute. If necessary, a distinction is made between the data type for READ and WRITE modes.
In some cases, only certain values are allowed, and they are listed here.
In some cases an example is included.
The following attributes are used for the environment handle.
READ/WRITE
This attribute sets the value of OCI_DURATION_DEFAULT for allocation durations for the application associated with the environment handle.
OCIDuration */OCIDuration
READ/WRITE
The login name (DN) to use when connecting to the LDAP server.
oratext **/oratext *
READ/WRITE
When this attribute is set to TRUE, during OCICacheFlush() the objects that belong to the same table are flushed, which can considerably improve performance. An attribute value of TRUE should only be used when the order in which the objects are flushed is not important. When the attribute value is set to TRUE, it is not guaranteed that the order in which the objects are marked dirty is preserved.
boolean */boolean
READ/WRITE
Sets the maximum size (high watermark) for the client-side object cache as a percentage of the optimal size. Usually you can set the value at 10%, the default, of the optimal size, OCI_ATTR_CACHE_OPT_SIZE. Setting this attribute to 0 results in a value of 10 being used. The object cache uses the maximum and optimal values for freeing unused memory in the object cache.
See Also:
"Object Cache Parameters"ub4 */ub4
READ/WRITE
Sets the optimal size for the client-side object cache in bytes. The default value is 8 megabytes (MB). Setting this attribute to 0 results in a value of 8 MB being used.
See Also:
"Object Cache Parameters"ub4 */ub4
READ
Local (client-side) character set ID. Users can update this setting only after creating the environment handle but before calling any other OCI functions. This restriction ensures the consistency among data and metadata in the same environment handle. When character set ID is UTF-16, an attempt to get this attribute is invalid.
ub2 *
READ
Local (client-side) national character set ID. Users can update this setting only after creating the environment handle but before calling any other OCI functions. This restriction ensures the consistency among data and metadata in the same environment handle. When character set ID is UTF-16, an attempt to get this attribute is invalid.
ub2 *
READ
Encoding method is UTF-16. The value 1 means that the environment handle is created when the encoding method is UTF-16, whereas 0 means that it is not. This attribute value can only be set by the call to OCIEnvCreate() and cannot be changed later.
ub1 *
WRITE
This attribute registers an event callback function.
See Also:
"HA Event Notification"OCIEventCallback
WRITE
This attribute registers a context passed to an event callback.
See Also:
"HA Event Notification"void *
READ
The current size of the memory allocated from the environment handle. This may help you track where memory is being used most in an application.
ub4 *
READ/WRITE
The authentication mode. The following are the valid values:
0x0: No authentication; anonymous bind.
0x1: Simple authentication; user name and password authentication.
0x5: SSL connection with no authentication.
0x6: SSL: only server authentication required.
0x7: SSL: both server authentication and client authentication are required.
0x8: Authentication method is determined at run time.
ub2 */ub2
READ/WRITE
If the authentication method is "simple authentication" (user name and password authentication), then this attribute holds the password to use when connecting to the LDAP server.
oratext **/oratext *
READ/WRITE
The administrative context of the client. This is usually the root of the Oracle Database LDAP schema in the LDAP server.
oratext **/oratext *
READ/WRITE
The name of the host on which the LDAP server runs.
oratext **/oratext *
READ/WRITE
The port on which the LDAP server is listening.
ub2 */ub2
READ
Returns TRUE if the environment was initialized in object mode.
boolean *
READ/WRITE
This attribute sets the value of OCI_PIN_DEFAULT for the application associated with the environment handle.
For example, if OCI_ATTR_PINOPTION is set to OCI_PIN_RECENT, and OCIObjectPin() is called with the pin_option parameter set to OCI_PIN_DEFAULT, the object is pinned in OCI_PIN_RECENT mode.
OCIPinOpt */OCIPinOpt
READ/WRITE
When this attribute is set to TRUE, newly created objects have non-NULL attributes.
See Also:
"Creating Objects"boolean */boolean
READ/WRITE
When this attribute is set to TRUE, applications receive an ORA-08179 error when attempting to flush an object that has been modified in the server by another committed transaction.
See Also:
"Implementing Optimistic Locking"boolean */boolean
READ/WRITE
This attribute sets the value of OCI_DURATION_DEFAULT for pin durations for the application associated with the environment handle.
OCIDuration */OCIDuration
READ
Returns the size of the memory currently allocated from the shared pool. This attribute works on any environment handle, but the process must be initialized in shared mode to return a meaningful value. This attribute is read as follows:
ub4 heapsz = 0;
OCIAttrGet((void *)envhp, (ub4)OCI_HTYPE_ENV,
(void *) &heapsz, (ub4 *) 0,
(ub4)OCI_ATTR_SHARED_HEAPALLOC, errhp);
ub4 *
READ/WRITE
If the authentication method is SSL authentication, this attribute contains the location of the client wallet.
oratext **/oratext *
The following attributes are used for the error handle.
READ
Returns the offset (into the DML array) at which the error occurred.
ub4 *
The following attributes are used for service context handle.
READ
Returns the environment context associated with the service context.
OCIEnv **
READ
Allows you to determine whether an application has switched to Oracle release 7 mode (for example, through an OCISvcCtxToLda() call). A nonzero (TRUE) return value indicates that the application is currently running in Oracle release 8 mode, a zero (false) return value indicates that the application is currently running in Oracle release 7 mode.
ub1 *
The following code sample shows how this attribute is used:
in_v8_mode = 0;
OCIAttrGet ((void *)svchp, (ub4)OCI_HTYPE_SVCCTX, (ub1 *)&in_v8_mode,
(ub4) 0, OCI_ATTR_IN_V8_MODE, errhp);
if (in_v8_mode)
fprintf (stdout, "In V8 mode\n");
else
fprintf (stdout, "In V7 mode\n");
READ/WRITE
When read, returns the pointer to the server context attribute of the service context.
When changed, sets the server context attribute of the service context.
OCIServer ** / OCIServer *
READ/WRITE
When read, returns the pointer to the authentication context attribute of the service context.
When changed, sets the authentication context attribute of the service context.
OCISession **/ OCISession *
READ/WRITE
Used to get and set the application's callback function on the OCISvcCtx handle. This function, if registered on OCISvcCtx, is called when a statement in the statement cache belonging to this service context is purged or when the session is ended.
The callback function must be of this prototype:
sword (*OCICallbackStmtCache)(void *ctx, OCIStmt *stmt, ub4 mode)
ctx: IN argument. This is the same as the context the application has set on the current statement handle.
stmt: IN argument. This is the statement handle that is being purged from the cache.
mode: IN argument. This is the mode in which the callback function is being called. Currently only one value is supported, OCI_CBK_STMTCACHE_STMTPURGE, which means the callback is being called during purging of the current statement.
sword (*OCICallbackStmtCache)(void *ctx, OCIStmt *stmt, ub4 mode)
READ/WRITE
The default value of the statement cache size is 20 statements, for a statement cache-enabled session. The user can increase or decrease this value by setting this attribute on the service context handle. This attribute can also be used to enable or disable statement caching for the session, pooled or nonpooled. Statement caching can be enabled by setting the attribute to a nonzero size and disabled by setting it to zero.
ub4 */ ub4
READ/WRITE
When read, returns the pointer to the transaction context attribute of the service context.
When changed, sets the transaction context attribute of the service context.
OCITrans ** / OCITrans *
The following attributes are used for the server handle.
See Also:
The following event handle attributes are also available for the server handle:READ
Displays an unauthorized access banner from a file.
oratext **
READ
Returns the environment context associated with the server context.
OCIEnv **
READ/WRITE
The external name is the user-friendly global name stored in sys.props$.value$, where name = 'GLOBAL_DB_NAME'. It is not guaranteed to be unique unless all databases register their names with a network directory service.
Database names can be exchanged with the server for distributed transaction coordination. Server database names can only be accessed only if the database is open at the time the OCISessionBegin() call is issued.
oratext **/ oratext *
READ/WRITE
Sets the failover callback to the callback definition structure of type OCIFocbkStruct as part of failover callback registration and unregistration on the server context handle.
OCIFocbkStruct *
READ/WRITE
Sets the client database name that is recorded when performing global transactions. The DBA can use the name to track transactions that may be pending in a prepared state due to failures.
oratext ** / oratext *
READ
Allows you to determine whether an application has switched to Oracle release 7 mode (for example, through an OCISvcCtxToLda() call). A nonzero (TRUE) return value indicates that the application is currently running in Oracle release 8 mode, a zero (FALSE) return value indicates that the application is currently running in Oracle release 7 mode.
ub1 *
READ/WRITE
This attribute determines the blocking mode. When read, the attribute value returns TRUE if the server context is in nonblocking mode. When set, it toggles the nonblocking mode attribute. You must set this attribute only after OCISessionBegin() or OCILogon2() has been called. Otherwise, an error is returned.
See Also:
"Nonblocking Mode in OCI"ub1 */ub1
READ/WRITE
An alphanumeric string not exceeding 30 characters specifying the server group. This attribute can only be set after calling OCIServerAttach().
See Also:
"Password and Session Management"oratext **/oratext *
READ
Returns the current status of the server handle. Values are:
OCI_SERVER_NORMAL - There is an active connection to the server. The last call on the connection went through. There is no guarantee that the next call will go through.
OCI_SERVER_NOT_CONNECTED - There is no connection to the server.
ub4 *
The following code sample shows how this parameter is used:
ub4 serverStatus = 0
OCIAttrGet((void *)srvhp, OCI_HTYPE_SERVER,
(void *)&serverStatus, (ub4 *)0, OCI_ATTR_SERVER_STATUS, errhp);
if (serverStatus == OCI_SERVER_NORMAL)
printf("Connection is up.\n");
else if (serverStatus == OCI_SERVER_NOT_CONNECTED)
printf("Connection is down.\n");
READ
Set to TRUE if the server handle is TAF-enabled and FALSE if not.
See Also:
"Custom Pooling: Tagged Server Handles"boolean *
READ
If the handle was allocated with extra memory, this attribute returns a pointer to the user memory. A NULL pointer is returned for those handles not allocated with extra memory.
See Also:
"Custom Pooling: Tagged Server Handles"void *
These attributes also apply to the user session handle.
See Also:
"User Session Handle Attributes"These attributes also apply to the authentication information handle.
WRITE
The name of the current action within the current module. Can be set to NULL. When the current action terminates, set this attribute again with the name of the next action, or NULL if there is no next action. Can be up to 32 bytes long.
oratext *
OCIAttrSet(session, OCI_HTYPE_SESSION,(void *)"insert into employees",
(ub4)strlen("insert into employees"), OCI_ATTR_ACTION, error_handle);
Note:
This attribute is not supported with database resident connection pooling.WRITE
Specifies an attribute name of the externally initialized context.
oratext *
Note:
This attribute is not supported with database resident connection pooling.READ
Gets the application context list descriptor for the session.
OCIParam **
Note:
This attribute is not supported with database resident connection pooling.WRITE
Specifies the namespace of the externally initialized context.
oratext *
Note:
This attribute is not supported with database resident connection pooling.WRITE
Initializes the externally initialized context array size with the number of attributes.
ub4
Note:
This attribute is not supported with database resident connection pooling.WRITE
Specifies a value of the externally initialized context.
oratext *
READ
Display a user actions auditing banner from a file.
oratext **
READ
Returns the server-side time for the preceding call in microseconds.
ub8 *
WRITE
Specifies the certificate of the client for use in proxy authentication. Certificate-based proxy authentication using OCI_ATTR_CERTIFICATE will not be supported in future Oracle Database releases. Use OCI_ATTR_DISTINGUISHED_NAME or OCI_ATTR_USERNAME attribute instead.
ub1 *
WRITE
Specifies the user identifier in the session handle. Can be up to 64 bytes long. It can contain the user name, but do not include the password for security reasons. The first character of the identifier should not be ':'. If it is, the behavior is unspecified.
oratext *
OCIAttrSet(session, OCI_HTYPE_SESSION,(void *)"janedoe",
(ub4)strlen("janedoe"), OCI_ATTR_CLIENT_IDENTIFIER,
error_handle);
WRITE
Client application additional information. Can also be set by the DBMS_APPLICATION_INFO package. It is stored in the V$SESSION view. Can be up to 64 bytes long.
oratext *
READ/WRITE
When set to TRUE, causes the server to measure call time, in milliseconds, for each subsequent OCI call.
boolean */boolean
READ/WRITE
This attribute of OCIAuthInfo handle explicitly names the connection class (a string of up to 128 characters) for a database resident connection pool.
oratext **/oratext *
READ/WRITE
Calling OCIAttrSet() with this attribute has the same effect as the SQL command ALTER SESSION SET CURRENT_SCHEMA, if the schema name and the session exist. The schema is altered on the next OCI call that does a round-trip to the server, avoiding an extra round-trip. If the new schema name does not exist, the same error is returned as the error returned from ALTER SESSION SET CURRENT_SCHEMA. The new schema name is placed before database objects in DML or DDL commands that you then enter.
When a client using this attribute communicates with a server that has a software release earlier than Oracle Database 10g Release 2, the OCIAttrSet() call is ignored. This attribute is also readable by OCIAttrGet().
ub4/ub4
text schema[] = "hr";
err = OCIAttrSet( (void ) mysessp, OCI_HTYPE_SESSION, (void *)schema,
(ub4)strlen( (char *)schema), OCI_ATTR_CURRENT_SCHEMA, (OCIError *)myerrhp);
OCI_ATTR_DEFAULT_LOBPREFETCH_SIZE
READ/WRITE
Allows the user to enable prefetching for all the LOB locators fetched in the session. Specifies the default prefetch buffer size for each LOB locator.
ub4 */ub4
WRITE
Specifies distinguished name of the client for use in proxy authentication.
oratext *
READ/WRITE
Specifies the name of the driver layer using OCI, such as JDBC, ODBC, PHP, SQL*Plus, and so on. Names starting with "ORA$" are reserved also. A future application can choose its own name and set it as an aid to fault diagnosability. Set this attribute before executing OCISessionBegin(). Pass an array containing up to 9 single-byte characters, including the null terminator. This data is not validated and is passed directly to the server to be displayed in a V$SESSION_CONNECT_INFO or GV$SESSION_CONNECT_INFO view. OCI only ensures that the driver name array is not greater than 30 characters. If more than 9 characters are passed, only the first 8 characters are displayed.
oratext **/oratext *
...
oratext client_driver[9];
...
checkerr(errhp, OCIAttrSet(authp, OCI_HTYPE_SESSION,
client_driver, (ub4)(strlen(client_driver)),
OCI_ATTR_DRIVER_NAME, errhp));
checkerr(errhp, OCISessionBegin(svchp, errhp, authp, OCI_CRED_RDBMS, OCI_DEFAULT);
...
READ/WRITE
Specifies the edition to be used for this session. If a value for this attribute has not been set explicitly, the value in the environment variable ORA_EDITION is returned.
oratext *
WRITE
Specifies the role or roles that the client is to initially possess when the application server connects to an Oracle database on its behalf.
oratext **
READ/WRITE
Specifies the session identified for the session handle. Allows you to clone a session from one environment to another, in the same process or between processes. These processes can be on the same system or different systems. For a session to be cloned, the session must be authenticated as migratable.
See Also:
"Password and Session Management"ub1 *
The following code sample shows how this attribute is used:
OCIAttrSet ((void *) authp, (ub4)OCI_HTYPE_SESSION, (void *) mig_session,
(ub4) sz, (ub4)OCI_ATTR_MIGSESSION, errhp);
WRITE
The name of the current module running in the client application. When the current module terminates, call with the name of the new module, or use NULL if there is no new module. Can be up to 48 bytes long.
oratext *
OCIAttrSet(session, OCI_HTYPE_SESSION,(void *)"add_employee",
(ub4)strlen("add_employee"), OCI_ATTR_MODULE, error_handle);
WRITE
Specifies a password to use for authentication.
oratext *
WRITE
Specifies the target user name for access through a proxy.
oratext *
WRITE
Specifies that the credentials of the application server are to be used for proxy authentication.
OCISession
READ/WRITE
An attribute of the OCIAuthInfo handle for database resident connection pooling. Values are OCI_ATTR_PURITY_NEW, the application requires a session not tainted with any prior session state; or OCI_ATTR_PURITY_SELF, the session can have been used before. If the application does not specify the purity when invoking OCISessionGet(), the purity value OCI_ATTR_PURITY_DEFAULT is assumed. This later translates to either OCI_ATTR_PURITY_NEW or OCI_ATTR_PURITY_SELF depending on the type of application.
ub4 */ub4
READ/WRITE
Specifies the current state of the database session. Set to OCI_SESSION_STATEFUL if the session is required to perf rm a database task. If the application is no longer dependent on the current session for subsequent database activity, set to OCI_SESSION_STATELESS.
See Also:
"Marking Sessions Explicitly as Stateful or Stateless" for more information and an example usingOCI_ATTR_SESSION_STATEub1 *
READ/WRITE
Specifies a user name to use for authentication.
oratext **/oratext *
The following attributes are used for the administration handle.
READ/WRITE
Set this attribute before a call to OCIDBStartup() to specify the location of the client-side parameter file that is used to start the database. If this attribute is not set, then the server-side parameter file is used. If the server-side parameter file does not exist, an error is returned.
oratext */oratext *
The following attributes are used for the connection pool handle.
Note:
Shrinkage of the pool only occurs when there is a network round-trip. If there are no operations, then the connections remain active.READ/WRITE
Connections idle for more than this time value (in seconds) are terminated to maintain an optimum number of open connections. This attribute can be set dynamically. If this attribute is not set, the connections are never timed out.
ub4 */ub4
READ/WRITE
This attribute determines if retrial for a connection must be performed when all connections in the pool are found to be busy and the number of connections has reached the maximum.
If this attribute is set, an error is thrown when all the connections are busy and no more connections can be opened. Otherwise, the call waits until it gets a connection.
When read, the attribute value is returned as TRUE if it has been set.
ub1 */ub1
READ
Returns the number of busy connections.
ub4 *
READ
Returns the number of open connections.
ub4 *
READ
Returns the number of minimum connections.
ub4 *
READ
Returns the number of maximum connections.
ub4 *
READ
Returns the connection increment parameter.
ub4 *
The following attributes are used for the session pool handle.
READ
Returns the number of busy sessions.
ub4 *
READ/WRITE
This attribute determines the behavior of the session pool when all sessions in the pool are found to be busy and the number of sessions has reached the maximum. Values are:
OCI_SPOOL_ATTRVAL_WAIT - The thread waits and blocks until a session is freed. This is the default value.
OCI_SPOOL_ATTRVAL_NOWAIT - An error is returned.
OCI_SPOOL_ATTRVAL_FORCEGET - A new session is created even though all the sessions are busy and the maximum number of sessions has been reached. OCISessionGet() returns a warning. In this case, if new sessions are created that have exceeded the maximum, OCISessionGet() returns a warning.
Note that if this value is set, it is possible that there can be an attempt to create more sessions than can be supported by the instance of the Oracle database. In this case, the server returns the following error:
ORA 00018 - Maximum number of sessions exceeded
In this case, the error is propagated to the session pool user.
When read, the appropriate attribute value is returned.
ub1 */ ub1
READ
Returns the session increment parameter.
ub4 *
READ
Returns the number of maximum sessions.
ub4 *
READ
Returns the number of minimum sessions.
ub4 *
READ
Returns the number of open sessions.
ub4 *
WRITE
To make pre-session creation attributes effective on the sessions being retrieved from the session pool, this attribute can be set on the session pool handle. Currently only the following attributes can be set on this OCIAuthInfo handle:
OCI_ATTR_DRIVER_NAME
OCI_ATTR_EDITION
If any other attributes are set on the OCIAuthInfo handle and the OCIAuthInfo handle is set on the session pool handle, an error results.Moreover, the OCIAuthInfo handle should be set on the session pool handle only before calling OCISessionPoolCreate() with the session pool handle. Setting it after OCISessionPoolCreate() results in an error.
OCIAuthInfo *
READ/WRITE
Sets the default statement cache size to this value for each of the sessions in a session pool. The statement cache size for a particular session in the pool can, at any time, be overridden by using OCI_ATTR_STMTCACHESIZE on that session.
See Also:
"Statement Caching in OCI"ub4 */ ub4
READ/WRITE
The sessions idle for more than this time (in seconds) are terminated periodically to maintain an optimum number of open sessions. This attribute can be set dynamically. If this attribute is not set, the least recently used sessions may be timed out if and when space in the pool is required. OCI only checks for timed out sessions when it releases one back to the pool.
ub4 */ ub4
The following attributes are used for the transaction handle.
READ/WRITE
Can be used to establish or read a text string that identifies a transaction. This is an alternative to using the XID to identify the transaction. The oratext string can be up to 64 bytes long.
oratext ** (READ) / oratext * (WRITE)
READ/WRITE
Can set or read a timeout interval value used at prepare time.
ub4 * (READ) / ub4 (WRITE)
READ/WRITE
Can set or read an XID that identifies a transaction.
XID ** (READ) / XID * (WRITE)
The following attributes are used for the statement handle.
READ
Returns the number of bind positions on the statement handle.
ub4 *
OCIHandleAlloc(env,(void **) &pStatement, OCI_HTYPE_STMT, (size_t)0, (void **)0);
OCIStmtPrepare (pStatement, err, pszQuery, (ub4)strlen(pszQuery),
(ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT);
OCIAttrGet(pStatement, OCI_HTYPE_STMT, &iNbParameters, NULL, OCI_ATTR_BIND_COUNT,
err);
WRITE
When this attribute is set to the appropriate subscription handle, execution of the query also creates the registration of the query for continuous query notification.
OCISubscription *
/* Associate the statement with the subscription handle */
OCIAttrSet (stmthp, OCI_HTYPE_STMT, subscrhp, 0,
OCI_ATTR_CHNF_REGHANDLE, errhp);
READ
Obtains the query ID of a registered query after registration is made by the call to OCIStmtExecute().
ub8 *
READ
Indicates the current position in the result set. This attribute can only be retrieved. It cannot be set.
ub4 *
READ
Indicates the current position in the result set. This attribute can only be retrieved. It cannot be set.
ub4 *
READ/WRITE
Specifies that the ROWIDs are fetched after doing a define at position 0, and a SELECT...FOR UPDATE statement.
boolean */boolean
See Also:
"Implicit Fetching of ROWIDs"READ
Returns the number of errors in the DML operation.
ub4 *
READ
Gets the number of columns in the select-list for the statement associated with the statement handle.
ub4 *
...
int i = 0;
ub4 parmcnt = 0;
ub2 type = 0;
OCIParam *colhd = (OCIParam *) 0; /* column handle */
/* Describe of a select-list */
OraText *sqlstmt = (OraText *)"SELECT * FROM employees WHERE employee_id = 100";
checkerr(errhp, OCIStmtPrepare(stmthp, errhp, (OraText *)sqlstmt,
(ub4)strlen((char *)sqlstmt),
(ub4) OCI_NTV_SYNTAX, (ub4) OCI_DEFAULT));
checkerr(errhp, OCIStmtExecute(svchp, stmthp, errhp, 1, 0,
(OCISnapshot *)0, (OCISnapshot *)0, OCI_DESCRIBE_ONLY));
/* Get the number of columns in the select list */
checkerr(errhp, OCIAttrGet((void *)stmthp, OCI_HTYPE_STMT, (void *)&parmcnt,
(ub4 *)0, OCI_ATTR_PARAM_COUNT, errhp));
/* Go through the column list and retrieve the data type of each column. You
start from pos = 1 */
for (i = 1; i <= parmcnt; i++)
{
/* Get parameter for column i */
checkerr(errhp, OCIParamGet((void *)stmthp, OCI_HTYPE_STMT, errhp,
(void **)&colhd, i));
/* Get data-type of column i */
type = 0;
checkerr(errhp, OCIAttrGet((void *)colhd, OCI_DTYPE_PARAM,
(void *)&type, (ub4 *)0, OCI_ATTR_DATA_TYPE, errhp));
}
...
READ
Returns the parse error offset for a statement.
ub2 *
WRITE
Sets the memory level for top-level rows to be prefetched. Rows up to the specified top-level row count are fetched if the memory level occupies no more than the specified memory usage limit. The default value is 0, which means that memory size is not included in computing the number of rows to prefetch.
ub4 *
WRITE
Sets the number of top-level rows to be prefetched. The default value is 1 row.
ub4 *
READ
Returns the number of rows processed so far after SELECT statements. For INSERT, UPDATE, and DELETE statements, it is the number of rows processed by the most recent statement. The default value is 1.
For nonscrollable cursors, OCI_ATTR_ROW_COUNT is the total number of rows fetched into user buffers with the OCIStmtFetch2() calls issued since this statement handle was executed. Because they are forward sequential only, this also represents the highest row number seen by the application.
For scrollable cursors, OCI_ATTR_ROW_COUNT represents the maximum (absolute) row number fetched into the user buffers. Because the application can arbitrarily position the fetches, this need not be the total number of rows fetched into the user's buffers since the (scrollable) statement was executed.
ub4 *
READ
Returns the ROWID descriptor allocated with OCIDescriptorAlloc().
OCIRowid *
READ
Indicates the number of rows that were successfully fetched into the user's buffers in the last fetch or execute with nonzero iterations. It can be used for both scrollable and nonscrollable statement handles.
ub4 *
ub4 rows;
ub4 sizep = sizeof(ub4);
OCIAttrGet((void *) stmhp, (ub4) OCI_HTYPE_STMT,
(void *)& rows, (ub4 *) &sizep, (ub4)OCI_ATTR_ROWS_FETCHED,
errhp);
READ
Returns the function code of the SQL command associated with the statement.
ub2 *
Table A-1 lists the SQL command codes.
| Code | SQL Function | Code | SQL Function | Code | SQL Function |
|---|---|---|---|---|---|
|
01 |
CREATE TABLE |
43 |
DROP EXTERNAL DATABASE |
85 |
TRUNCATE TABLE |
|
02 |
SET ROLE |
44 |
CREATE DATABASE |
86 |
TRUNCATE CLUSTER |
|
03 |
INSERT |
45 |
ALTER DATABASE |
87 |
CREATE BITMAPFILE |
|
04 |
SELECT |
46 |
CREATE ROLLBACK SEGMENT |
88 |
ALTER VIEW |
|
05 |
UPDATE |
47 |
ALTER ROLLBACK SEGMENT |
89 |
DROP BITMAPFILE |
|
06 |
DROP ROLE |
48 |
DROP ROLLBACK SEGMENT |
90 |
SET CONSTRAINTS |
|
07 |
DROP VIEW |
49 |
CREATE TABLESPACE |
91 |
CREATE FUNCTION |
|
08 |
DROP TABLE |
50 |
ALTER TABLESPACE |
92 |
ALTER FUNCTION |
|
09 |
DELETE |
51 |
DROP TABLESPACE |
93 |
DROP FUNCTION |
|
10 |
CREATE VIEW |
52 |
ALTER SESSION |
94 |
CREATE PACKAGE |
|
11 |
DROP USER |
53 |
ALTER USER |
95 |
ALTER PACKAGE |
|
12 |
CREATE ROLE |
54 |
COMMIT (WORK) |
96 |
DROP PACKAGE |
|
13 |
CREATE SEQUENCE |
55 |
ROLLBACK |
97 |
CREATE PACKAGE BODY |
|
14 |
ALTER SEQUENCE |
56 |
SAVEPOINT |
98 |
ALTER PACKAGE BODY |
|
15 |
(NOT USED) |
57 |
CREATE CONTROL FILE |
99 |
DROP PACKAGE BODY |
|
16 |
DROP SEQUENCE |
58 |
ALTER TRACING |
157 |
CREATE DIRECTORY |
|
17 |
CREATE SCHEMA |
59 |
CREATE TRIGGER |
158 |
DROP DIRECTORY |
|
18 |
CREATE CLUSTER |
60 |
ALTER TRIGGER |
159 |
CREATE LIBRARY |
|
19 |
CREATE USER |
61 |
DROP TRIGGER |
160 |
CREATE JAVA |
|
20 |
CREATE INDEX |
62 |
ANALYZE TABLE |
161 |
ALTER JAVA |
|
21 |
DROP INDEX |
63 |
ANALYZE INDEX |
162 |
DROP JAVA |
|
22 |
DROP CLUSTER |
64 |
ANALYZE CLUSTER |
163 |
CREATE OPERATOR |
|
23 |
VALIDATE INDEX |
65 |
CREATE PROFILE |
164 |
CREATE INDEXTYPE |
|
24 |
CREATE PROCEDURE |
66 |
DROP PROFILE |
165 |
DROP INDEXTYPE |
|
25 |
ALTER PROCEDURE |
67 |
ALTER PROFILE |
166 |
ALTER INDEXTYPE |
|
26 |
ALTER TABLE |
68 |
DROP PROCEDURE |
167 |
DROP OPERATOR |
|
27 |
EXPLAIN |
69 |
(NOT USED) |
168 |
ASSOCIATE STATISTICS |
|
28 |
GRANT |
70 |
ALTER RESOURCE COST |
169 |
DISASSOCIATE STATISTICS |
|
29 |
REVOKE |
71 |
CREATE SNAPSHOT LOG |
170 |
CALL METHOD |
|
30 |
CREATE SYNONYM |
72 |
ALTER SNAPSHOT LOG |
171 |
CREATE SUMMARY |
|
31 |
DROP SYNONYM |
73 |
DROP SNAPSHOT LOG |
172 |
ALTER SUMMARY |
|
32 |
ALTER SYSTEM SWITCH LOG |
74 |
CREATE SNAPSHOT |
173 |
DROP SUMMARY |
|
33 |
SET TRANSACTION |
75 |
ALTER SNAPSHOT |
174 |
CREATE DIMENSION |
|
34 |
PL/SQL EXECUTE |
76 |
DROP SNAPSHOT |
175 |
ALTER DIMENSION |
|
35 |
LOCK |
77 |
CREATE TYPE |
176 |
DROP DIMENSION |
|
36 |
NOOP |
78 |
DROP TYPE |
177 |
CREATE CONTEXT |
|
37 |
RENAME |
79 |
ALTER ROLE |
178 |
DROP CONTEXT |
|
38 |
COMMENT |
80 |
ALTER TYPE |
179 |
ALTER OUTLINE |
|
39 |
AUDIT |
81 |
CREATE TYPE BODY |
180 |
CREATE OUTLINE |
|
40 |
NO AUDIT |
82 |
ALTER TYPE BODY |
181 |
DROP OUTLINE |
|
41 |
ALTER INDEX |
83 |
DROP TYPE BODY |
182 |
UPDATE INDEXES |
|
42 |
CREATE EXTERNAL DATABASE |
84 |
DROP LIBRARY |
183 |
ALTER OPERATOR |
READ
Returns the text of the SQL statement prepared in a statement handle. In UTF-16 mode, the returned statement is in UTF-16 encoding. The length is always in bytes.
oratext *
READ/WRITE
Used to get and set the application's opaque context on the statement handle. This context can be of any type that the application defines. It is primarily used for encompassing the bind and define buffer addresses.
void *
READ
Returns the fetch state of that statement. This attribute can be used by the caller to determine if the session can be used in another service context or if it is still needed in the current set of data access calls. Basically, if you are in the middle of a fetch-execute cycle, then you do not want to release the session handle for another statement execution. Valid values are:
OCI_STMT_STATE_INITIALIZED
OCI_STMT_STATE_EXECUTED
OCI_STMT_STATE_END_OF_FETCH
ub4 *
READ
The type of statement associated with the handle. Valid values are:
OCI_STMT_SELECT
OCI_STMT_UPDATE
OCI_STMT_DELETE
OCI_STMT_INSERT
OCI_STMT_CREATE
OCI_STMT_DROP
OCI_STMT_ALTER
OCI_STMT_BEGIN (PL/SQL statement)
OCI_STMT_DECLARE (PL/SQL statement)
ub2 *
The following attributes are used for the bind handle.
WRITE
Sets the number of characters in character type data.
See Also:
"Buffer Expansion During OCI Binding"ub4 *
READ/WRITE
Character set form of the bind handle. The default form is SQLCS_IMPLICIT. Setting this attribute causes the bind handle to use the database or national character set on the client side. Set this attribute to SQLCS_NCHAR for the national character set or SQLCS_IMPLICIT for the database character set.
ub1 *
READ/WRITE
Character set ID of the bind handle. If the character set of the input data is UTF-16 (replaces the deprecated OCI_UC2SID, which is retained for backward compatibility), the user must set the character set ID to OCI_UTF16ID. The bind value buffer is assumed to be a utext buffer, so length semantics for input length pointers and return values changes to character semantics (number of utexts). However, the size of the bind value buffer in the preceding OCIBind call must be stated in bytes.
If OCI_ATTR_CHARSET_FORM is set, then OCI_ATTR_CHARSET_ID should be set only afterward. Setting OCI_ATTR_CHARSET_ID before setting OCI_ATTR_CHARSET_FORM causes unexpected results.
ub2 *
WRITE
Sets the number of characters that an application reserves on the server to store the data being bound.
sb4 *
READ/WRITE
Sets the maximum number of bytes allowed in the buffer on the server side to accommodate client-side bind data after character set conversions.
sb4 *
WRITE
Specifies packed decimal precision. For SQLT_PDN values, the precision should be equal to 2*(value_sz-1). For SQLT_SLS values, the precision should be equal to (value_sz-1).
After a bind or define, this value is initialized to zero. The OCI_ATTR_PDPRC attribute should be set first, followed by OCI_ATTR_PDSCL. If either of these values must be changed, first perform a rebind/redefine operation, and then reset the two attributes in order.
ub2 *
WRITE
Specifies the scale for packed decimal values.
After a bind or define, this value is initialized to zero. The OCI_ATTR_PDPRC attribute should be set first, followed by OCI_ATTR_PDSCL. If either of these values must be changed, first perform a rebind/redefine operation, and then reset the two attributes in order.
sb2 *
READ
This attribute returns the number of rows that will be returned in the current iteration when you are in the OUT callback function for binding a DML statement with a RETURNING clause.
ub4 *
The following attributes are used for the define handle.
WRITE
This attribute is deprecated.
Sets the number of characters in character type data. This specifies the number of characters desired in the define buffer. The define buffer length as specified in the define call must be greater than number of characters.
ub4 *
READ/WRITE
The character set form of the define handle. The default form is SQLCS_IMPLICIT. Setting this attribute causes the define handle to use the database or national character set on the client side. Set this attribute to SQLCS_NCHAR for the national character set or SQLCS_IMPLICIT for the database character set.
ub1 *
READ/WRITE
The character set ID of the define handle. If the character set of the output data should be UTF-16, the user must set the character set IDOTT to OCI_UTF16ID. The define value buffer is assumed to be a utext buffer, so length semantics for indicators and return values changes to character semantics (number of utexts). However, the size of the define value buffer in the preceding OCIDefine call must be stated in bytes.
If OCI_ATTR_CHARSET_FORM is set, then OCI_ATTR_CHARSET_ID should be set only afterward. Setting OCI_ATTR_CHARSET_ID before setting OCI_ATTR_CHARSET_FORM causes unexpected results.
ub2 *
READ/WRITE
Specifies the prefetch length and chunk size for the LOB locators to be fetched from a particular column.
boolean */boolean
READ/WRITE
Overrides the default cache buffer size for the LOB locators to be fetched from a particular column.
ub4 */ub4
WRITE
Specifies the maximum number of characters that the client application allows in the define buffer.
sb4 *
WRITE
Specifies packed decimal precision. For SQLT_PDN values, the precision should be equal to 2*(value_sz-1). For SQLT_SLS values, the precision should be equal to (value_sz-1).
After a bind or define, this value is initialized to zero. The OCI_ATTR_PDPRC attribute should be set first, followed by OCI_ATTR_PDSCL. If either of these values must be changed, first perform a rebind/redefine operation, and then reset the two attributes in order.
ub2 *
WRITE
Specifies the scale for packed decimal values.
After a bind or define, this value is initialized to zero. The OCI_ATTR_PDPRC attribute should be set first, followed by OCI_ATTR_PDSCL. If either of these values must be changed, first perform a rebind/redefine operation, and then reset the two attributes in order.
sb2 *
The following attributes are used for the describe handle.
READ
Points to the root of the description. Used for subsequent calls to OCIAttrGet() and OCIParamGet().
ub4 *
READ
Returns the number of parameters in the describe handle. When the describe handle is a description of the select list, this refers to the number of columns in the select list.
ub4 *
The following attributes are used for the parameter descriptor.
For a detailed list of parameter descriptor attributes, see Chapter 6.
The following attributes are used for the parameter descriptor.
WRITE
Sets the internal LOB locator to empty. The locator can then be used as a bind variable for an INSERT or UPDATE statement to initialize the LOB to empty. Once the LOB is empty, OCILobWrite2() or OCILobWrite() (deprecated) can be called to populate the LOB with data. This attribute is only valid for internal LOBs (that is, BLOB, CLOB, NCLOB).
Applications should pass the address of a ub4 that has a value of 0; for example, declare the following:
ub4 lobEmpty = 0
Then they should pass the address: &lobEmpty.
ub4 *
The following attributes are used for complex objects.
See Also:
"Complex Object Retrieval"The following attributes are used for the complex object retrieval handle.
WRITE
The depth level for complex object retrieval.
ub4 *
OCI_ATTR_COMPLEXOBJECT_COLL_OUTOFLINE
WRITE
Whether to fetch collection attributes in an object type out-of-line.
ub1 *
The following attributes are used for the complex object retrieval descriptor.
OCI_ATTR_COMPLEXOBJECTCOMP_TYPE
WRITE
A type of REF to follow for complex object retrieval.
void *
OCI_ATTR_COMPLEXOBJECTCOMP_TYPE_LEVEL
WRITE
Depth level for the following REFs of type OCI_ATTR_COMPLEXOBJECTCOMP_TYPE.
ub4 *
The following attributes are used for the streams advanced queuing descriptor.
The following attributes are properties of the OCIAQEnqOptions descriptor.
WRITE
The enqueue call can enqueue a persistent or buffered message into a queue, by setting the OCI_ATTR_MSG_DELIVERY_MODE attribute in the OCIAQEnqOptions descriptor to OCI_MSG_PERSISTENT or OCI_MSG_BUFFERED, respectively. The default value for this attribute is OCI_MSG_PERSISTENT.
ub2
READ/WRITE
This feature is deprecated and may be removed in a future release.
Specifies the message identifier of the message that is referenced in the sequence deviation operation. This value is valid if and only if OCI_ENQ_BEFORE is specified in OCI_ATTR_SEQUENCE_DIVISION. This value is ignored if the sequence deviation is not specified.
OCIRaw *
READ/WRITE
This feature is deprecated for new applications, but it is retained for compatibility.
It specifies whether the message being enqueued should be dequeued before other messages in the queue.
ub4
The only valid values are:
OCI_ENQ_BEFORE - The message is enqueued ahead of the message specified by OCI_ATTR_RELATIVE_MSGID.
OCI_ENQ_TOP - The message is enqueued ahead of any other messages.
READ/WRITE
The name of the transformation that must be applied before the message is enqueued into the database. The transformation must be created using DBMS_TRANSFORM.
oratext *
READ/WRITE
Specifies the transactional behavior of the enqueue request.
ub4
The only valid values are:
OCI_ENQ_ON_COMMIT - The enqueue is part of the current transaction. The operation is complete when the transaction commits. This is the default case.
OCI_ENQ_IMMEDIATE - The enqueue is not part of the current transaction. The operation constitutes a transaction of its own.
The following attributes are properties of the OCIAQDeqOptions descriptor.
READ/WRITE
Name of the consumer. Only those messages matching the consumer name are accessed. If a queue is not set up for multiple consumers, this field should be set to null.
oratext *
READ/WRITE
Specifies the correlation identifier of the message to be dequeued. Special pattern-matching characters, such as the percent sign (%) and the underscore (_), can be used. If multiple messages satisfy the pattern, the order of dequeuing is undetermined.
oratext *
READ/WRITE
Specifies the locking behavior associated with the dequeue.
ub4
The only valid values are:
OCI_DEQ_BROWSE - Read the message without acquiring any lock on the message. This is equivalent to a SELECT statement.
OCI_DEQ_LOCKED - Read and obtain a write lock on the message. The lock lasts for the duration of the transaction. This is equivalent to a SELECT FOR UPDATE statement.
OCI_DEQ_REMOVE - Read the message and update or delete it. This is the default. The message can be retained in the queue table based on the retention properties.
OCI_DEQ_REMOVE_NODATA - Confirm receipt of the message, but do not deliver the actual message content.
READ/WRITE
Specifies the message identifier of the message to be dequeued.
OCIRaw *
READ/WRITE
This attribute is a Boolean expression similar to the WHERE clause of a SQL query. This Boolean expression can include conditions on message properties, user data properties (object payloads only), and PL/SQL or SQL functions.
To specify dequeue conditions on a message payload (object payload), use attributes of the object type in clauses. You must prefix each attribute with tab.user_data as a qualifier to indicate the specific column of the queue table that stores the payload.
The attribute cannot exceed 4000 characters. If multiple messages satisfy the dequeue condition, then the order of dequeuing is indeterminate, and the sort order of the queue is not honored.
oratext *
checkerr(errhp, OCIAttrSet(deqopt, OCI_DTYPE_AQDEQ_OPTIONS,
(dvoid *)"tab.priority between 2 and 4" ,
strlen("tab.priority between 2 and 4"),
OCI_ATTR_DEQCOND, errhp));
WRITE
You can specify the dequeue call to dequeue persistent, buffered, or both kinds of messages from a queue, by setting the OCI_ATTR_MSG_DELIVERY_MODE attribute in the OCIAQDeqOptions descriptor to OCI_MSG_PERSISTENT, OCI_MSG_BUFFERED, or OCI_MSG_PERSISTENT_OR_BUFFERED, respectively. The default value for this attribute is OCI_MSG_PERSISTENT.
ub2
READ/WRITE
Specifies the position of the message that is retrieved. First, the position is determined. Second, the search criterion is applied. Finally, the message is retrieved.
ub4
The only valid values are:
OCI_DEQ_FIRST_MSG - Retrieves the first available message that matches the search criteria. This resets the position to the beginning of the queue.
OCI_DEQ_NEXT_MSG - Retrieves the next available message that matches the search criteria. If the previous message belongs to a message group, AQ retrieves the next available message that matches the search criteria and belongs to the message group. This is the default.
OCI_DEQ_NEXT_TRANSACTION - Skips the remainder of the current transaction group (if any) and retrieves the first message of the next transaction group. This option can only be used if message grouping is enabled for the current queue.
OCI_DEQ_FIRST_MSG_MULTI_GROUP - Indicates that a call to OCIAQDeqArray() resets the position to the beginning of the queue and dequeue messages (possibly across different transaction groups) that are available and match the search criteria, until reaching the iters limit. To distinguish between transaction groups, a new message property, OCI_ATTR_TRANSACTION_NO, is defined. All messages belonging to the same transaction group have the same value for this message property.
OCI_DEQ_NEXT_MSG_MULTI_GROUP - Indicates that a call to OCIAQDeqArray() dequeues the next set of messages (possibly across different transaction groups) that are available and match the search criteria, until reaching the iters limit. To distinguish between transaction groups, a new message property, OCI_ATTR_TRANSACTION_NO, is defined. All messages belonging to the same transaction group have the same value for this message property.
READ/WRITE
The name of the transformation that must be applied after the message is dequeued but before returning it to the dequeuing application. The transformation must be created using DBMS_TRANSFORM.
oratext *
READ/WRITE
Specifies whether the new message is dequeued as part of the current transaction. The visibility parameter is ignored when using the BROWSE mode.
ub4
The only valid values are:
OCI_DEQ_ON_COMMIT - The dequeue is part of the current transaction. This is the default.
OCI_DEQ_IMMEDIATE - The dequeued message is not part of the current transaction. It constitutes a transaction on its own.
READ/WRITE
Specifies the wait time if no message is currently available that matches the search criteria. This parameter is ignored if messages in the same group are being dequeued.
ub4
Any ub4 value is valid, but the following predefined constants are provided:
OCI_DEQ_WAIT_FOREVER - Wait forever. This is the default.
OCI_DEQ_NO_WAIT - Do not wait.
Note:
If theOCI_DEQ_NO_WAIT option is used to poll a queue, then messages are not dequeued after polling an empty queue. Use the OCI_DEQ_FIRST_MSG option instead of the default OCI_DEQ_NEXT_MSG setting of OCI_ATTR_NAVIGATION. You can also use a nonzero wait setting (1 is suggested) of OCI_ATTR_WAIT for the dequeue.The following attributes are properties of the OCIAQMsgProperties descriptor.
READ
Specifies the number of attempts that have been made to dequeue the message. This parameter cannot be set at enqueue time.
sb4
Any sb4 value is valid.
READ/WRITE
Specifies the identification supplied by the producer for a message at enqueuing.
oratext *
Any string up to 128 bytes is valid.
READ/WRITE
Specifies the number of seconds to delay the enqueued message. The delay represents the number of seconds after which a message is available for dequeuing. Dequeuing by message ID (msgid) overrides the delay specification. A message enqueued with delay set is in the WAITING state; when the delay expires the messages goes to the READY state. DELAY processing requires the queue monitor to be started. Note that the delay is set by the producer who enqueues the message.
sb4
Any sb4 value is valid, but the following predefined constant is available:
READ
Specifies the time that the message was enqueued. This value is determined by the system and cannot be set by the user.
OCIDate
READ/WRITE
Specifies the name of the queue to which the message is moved if it cannot be processed successfully. Messages are moved in two cases: If the number of unsuccessful dequeue attempts has exceeded max_retries; or if the message has expired. All messages in the exception queue are in the EXPIRED state.
The default is the exception queue associated with the queue table. If the exception queue specified does not exist at the time of the move, the message is moved to the default exception queue associated with the queue table, and a warning is logged in the alert file. If the default exception queue is used, the parameter returns a NULL value at dequeue time.
This attribute must refer to a valid queue name.
oratext *
READ/WRITE
Specifies the expiration of the message. It determines, in seconds, how long the message is available for dequeuing. This parameter is an offset from the delay. Expiration processing requires the queue monitor to be running.
While waiting for expiration, the message remains in the READY state. If the message is not dequeued before it expires, it is moved to the exception queue in the EXPIRED state.
sb4
Any sb4 value is valid, but the following predefined constant is available:
READ
After a dequeue call, the OCI client can read the OCI_ATTR_MSG_DELIVERY_MODE attribute in the OCIAQMsgProperties descriptor to determine whether a persistent or buffered message was dequeued. The value of the attribute is OCI_MSG_PERSISTENT for persistent messages and OCI_MSG_BUFFERED for buffered messages.
ub2
READ
Specifies the state of the message at the time of the dequeue. This parameter cannot be set at enqueue time.
ub4
Only the following values are returned:
OCI_MSG_WAITING - The message delay has not yet been reached.
OCI_MSG_READY - The message is ready to be processed.
OCI_MSG_PROCESSED - The message has been processed and is retained.
OCI_MSG_EXPIRED - The message has been moved to the exception queue.
READ/WRITE
The ID of the message in the last queue that generated this message. When a message is propagated from one queue to another, this attribute identifies the ID of the queue from which it was last propagated. When a message has been propagated through multiple queues, this attribute identifies the ID of the message in the last queue that generated this message, not the first queue.
OCIRaw *
READ/WRITE
Specifies the priority of the message. A smaller number indicates a higher priority. The priority can be any number, including negative numbers.
The default value is zero.
sb4
WRITE
This parameter is only valid for queues that allow multiple consumers. The default recipients are the queue subscribers. This parameter is not returned to a consumer at dequeue time.
OCIAQAgent **
READ/WRITE
Identifies the original sender of a message.
OCIAgent *
READ
For transaction-grouped queues, this identifies the transaction group of the message. This attribute is populated after a successful OCIAQDeqArray() call. All messages in a group have the same value for this attribute. This attribute cannot be used by the OCIAQEnqArray() call to set the transaction group for an enqueued message.
oratext *
The following attributes are properties of the OCIAQAgent descriptor.
READ/WRITE
Protocol-specific address of the recipient. If the protocol is 0 (default), the address is of the form [schema.]queue[@dblink].
oratext *
Can be any string up to 128 bytes.
READ/WRITE
Name of a producer or consumer of a message.
oratext *
Can be any Oracle Database identifier, up to 30 bytes.
READ/WRITE
Protocol to interpret the address and propagate the message. The default (and currently the only supported) value is 0.
ub1
The only valid value is zero, which is also the default.
The following attributes are properties of the OCIServerDNs descriptor.
READ
The number of database servers in the descriptor.
ub2
READ/WRITE
For read mode, this attribute returns the list of Oracle Database distinguished names that are already inserted into the descriptor.
For write mode, this attribute takes the distinguished name of an Oracle Database.
oratext **/oratext *
The following attributes are used for the subscription handle.
READ/WRITE
The distinguished names of the Oracle database that the client is interested in for the registration.
OCIServerDNs *
READ/WRITE
Subscription callback. If the attribute OCI_ATTR_SUBSCR_RECPTPROTO is set to OCI_SUBSCR_PROTO_OCI or is left not set, then this attribute must be set before the subscription handle can be passed into the registration call OCISubscriptionRegister().
ub4 (void *, OCISubscription *, void *, ub4, void *, ub4)
WRITE
Sets QOS (quality of service flags) specific to continuous query (CQ) notifications. For the possible values you can pass, see the "Subscription Handle Attributes for Continuous Query Notification".
ub4 *
READ/WRITE
Context that the client wants to get passed to the user callback denoted by OCI_ATTR_SUBSCR_CALLBACK when it gets invoked by the system. If the attribute OCI_ATTR_SUBSCR_RECPTPROTO is set to OCI_SUBSCR_PROTO_OCI or is left not set, then this attribute must be set before the subscription handle can be passed into the registration call OCI Subscription Register().
void *
READ/WRITE
Before registering for notification using OCISubscriptionRegister(), specify the client IP (in either IPv4 or IPv6 format) of the listening endpoint of the OCI notification client to which the notification is sent. Enter either IPv4 addresses in dotted decimal format, for example, 192.0.2.34, or IPv6 addresses in hexadecimal format, for example, 2001:0db8:0000:0000:0217:f2ff:fe4b:4ced.
See Also:
Oracle Database Net Services Administrator's Guide for more information about the IPv6 format for IP addressestext *
/* Set notification client address*/
text ipaddr[16] = "192.0.2.34";
(void) OCIAttrSet((dvoid *) envhp, (ub4) OCI_HTYPE_ENV,
(dvoid *) ipaddr, (ub4) strlen(ipaddr),
(ub4) OCI_ATTR_SUBSCR_HOSTADDR, errhp);
READ/WRITE
The client IP address (IPv4 or IPv6) on which an OCI client registered for notification listens, to receive notifications. For example, IPv4 address in dotted decimal format such as 192.1.2.34 or IPv6 address in hexadecimal format such as 2001:0db8:0000:0000:0217:f2ff:fe4b:4ced.
See Also:
Oracle Database Net Services Administrator's Guide for more information about the IPv6 format for IP addressesoratext *
READ/WRITE
Subscription name. All subscriptions are identified by a subscription name. A subscription name consists of a sequence of bytes of specified length. The length in bytes of the name must be specified as it is not assumed that the name is NULL-terminated. This is important because the name could contain multibyte characters.
Clients can set the subscription name attribute of a subscription handle using an OCIAttrSet() call and by specifying a handle type of OCI_HTYPE_SUBSCR and an attribute type of OCI_ATTR_SUBSCR_NAME.
All of the subscription callbacks need a subscription handle with the OCI_ATTR_SUBSCR_NAME and OCI_ATTR_SUBSCR_NAMESPACE attributes set. If the attributes are not set, an error is returned. The subscription name that is set for the subscription handle must be consistent with its namespace.
oratext *
READ/WRITE
Namespace in which the subscription handle is used. The valid values for this attribute are OCI_SUBSCR_NAMESPACE_AQ, OCI_SUBSCR_NAMESPACE_DBCHANGE, and OCI_SUBSCR_NAMESPACE_ANONYMOUS.
The subscription name that is set for the subscription handle must be consistent with its namespace.
ub4 *
Note:
OCI_OBJECT mode is required when using grouping notifications.OCI_ATTR_SUBSCR_NTFN_GROUPING_CLASS
READ/WRITE
Notification grouping class. If set to 0 (the default) all other notification grouping attributes must be 0. It is implemented for time in the latest release and is the only current criterion for grouping. Can be set to OCI_SUBSCR_NTFN_GROUPING_CLASS_TIME.
ub1 *
OCI_ATTR_SUBSCR_NTFN_GROUPING_REPEAT_COUNT
READ/WRITE
How many times to do the grouping. Notification repeat count. Positive integer. Can be set to OCI_NTFN_GROUPING_FOREVER to send grouping notifications forever.
sb4 *
OCI_ATTR_SUBSCR_NTFN_GROUPING_START_TIME
READ/WRITE
The time grouping starts. Set to a valid TIMESTAMP WITH TIME ZONE. The default is the current TIMESTAMP WITH TIME ZONE.
OCIDateTime */OCIDateTime **
OCI_ATTR_SUBSCR_NTFN_GROUPING_TYPE
READ/WRITE
The format of the grouping notification: whether a summary of all events in the group or just the last event in the group. Use OCIAttrSet() to set to one of the following notification grouping types: OCI_SUBSCR_NTFN_TYPE_SUMMARY or OCI_SUBSCR_NTFN_TYPE_LAST. Summary of notifications is the default. The other choice is the last notification.
ub1 *
OCI_ATTR_SUBSCR_NTFN_GROUPING_VALUE
READ/WRITE
Specifies the value for the grouping class. For time, this is the time-period of grouping notifications specified in seconds, that is, the time after which grouping notification is sent periodically until OCI_ATTR_SUBSCR_NTFN_GROUPING_REPEAT_COUNT is exhausted.
ub4 *
READ/WRITE
Buffer that corresponds to the payload that must be sent along with the notification. The length of the buffer can also be specified in the same set attribute call. This attribute must be set before a post can be performed on a subscription. For the current release, only an untyped (ub1 *) payload is supported.
ub1 *
READ/WRITE
The client port used to receive notifications. It is set on the client's environment handle.
ub4 *
READ/WRITE
Quality of service levels of the server. The possible settings are:
OCI_SUBSCR_QOS_RELIABLE - Reliable. If the database fails, it does not lose notification. Not supported for nonpersistent queues or buffered messaging.
OCI_SUBSCR_QOS_PURGE_ON_NTFN - Once received, purge notification and remove subscription.
OCI_SUBSCR_QOS_PAYLOAD - Payload notification.
ub4 *
READ/WRITE
The name of the recipient of the notification when the attribute OCI_ATTR_SUBSCR_RECPTPROTO is set to OCI_SUBSCR_PROTO_MAIL, OCI_SUBSCR_PROTO_HTTP, or OCI_SUBSCR_PROTO_SERVER.
For OCI_SUBSCR_PROTO_HTTP, OCI_ATTR_SUBSCR_RECPT denotes the HTTP URL (for example, http://www.oracle.com:80) to which notification is sent. The validity of the HTTP URL is never checked by the database.
For OCI_SUBSCR_PROTO_MAIL, OCI_ATTR_SUBSCR_RECPT denotes the email address (for example, xyz@oracle.com) to which the notification is sent. The validity of the email address is never checked by the database system.
For OCI_SUBSCR_PROTO_SERVER, OCI_ATTR_SUBSCR_RECPT denotes the database procedure (for example: schema.procedure) that is invoked when there is a notification. The subscriber must have appropriate permissions on the procedure for it to be executed.
See Also:
"Notification Procedure" for information about procedure definitionoratext *
READ/WRITE
The presentation with which the client wants to receive the notification. The valid values for this are OCI_SUBSCR_PRES_DEFAULT and OCI_SUBSCR_PRES_XML.
If not set, this attribute defaults to OCI_SUBSCR_PRES_DEFAULT.
For event notification in XML presentation, set this attribute to OCI_SUBSCR_PRES_XML. Otherwise, leave it unset or set it to OCI_SUBSCR_PRES_DEFAULT.
ub4
READ/WRITE
The protocol with which the client wants to receive the notification. The valid values for this are:
If an OCI client wants to receive the event notification, then you should set this attribute to OCI_SUBSCR_PROTO_OCI.
If you want an email to be sent on event notification, then set this attribute to OCI_SUBSCR_PROTO_MAIL. If you want a PL/SQL procedure to be invoked in the database on event notification, then set this attribute to OCI_SUBSCR_PROTO_SERVER. If you want an HTTP URL to be posted to on event notification, then set this attribute to OCI_SUBSCR_PROTO_HTTP.
If not set, this attribute defaults to OCI_SUBSCR_PROTO_OCI.
For OCI_SUBSCR_PROTO_OCI, the attributes OCI_ATTR_SUBSCR_CALLBACK and OCI_ATTR_SUBSCR_CTX must be set before the subscription handle can be passed into the registration call OCISubscriptionRegister().
For OCI_SUBSCR_PROTO_MAIL, OCI_SUBSCR_PROTO_SERVER, and OCI_SUBSCR_PROTO_HTTP, the attribute OCI_ATTR_SUBSCR_RECPT must be set before the subscription handle can be passed into the registration call OCISubscriptionRegister().
ub4 *
READ/WRITE
Registration timeout interval in seconds. If 0 or not specified, then the registration is active until the subscription is explicitly unregistered.
ub4 *
The following attributes are used for continuous query notification.
WRITE
The number of transactions that the client is to lag in continuous query notifications.
ub4 *
WRITE
Used to filter notifications based on operation type.
ub4 *
See Also:
"Continuous Query Notification" for details about the flag valuesWRITE
If TRUE, the continuous query notification message includes row-level details, such as operation type and ROWID. The default is FALSE.
boolean *
READ
Attributes provided to retrieve the list of table names that were registered. These attributes are available from the subscription handle after the query is executed.
OCIColl **
The following attributes are used for the continuous query notification descriptor.
READ
Name of the database.
oratext **
READ
Flags describing the notification type.
ub4 *
See Also:
"Continuous Query Notification" for the flag valuesREAD
Operation type: INSERT, UPDATE, DELETE, or OTHER.
ub4 *
READ
String representation of a ROWID.
oratext **
READ
A collection type describing operations on tables. Each element of the collection is a table continuous query descriptors (OCITableChangeDesc *) of type OCI_DTYPE_TABLE_CHDES that has the attributes that begin with OCI_ATTR_CHDES_TABLE. See the following entries.
OCIColl **
READ
Schema and table name. HR.EMPLOYEES, for example.
oratext **
READ
Flags describing the operations on the table.
ub4 *
See Also:
"OCI_DTYPE_TABLE_CHDES" for the flag valuesOCI_ATTR_CHDES_TABLE_ROW_CHANGES
READ
An embedded collection describing the changes to the rows of the table. Each element of the collection is a row continuous query descriptor (OCIRowChangeDesc *) of type OCI_DTYPE_ROW_CHDES that has the attributes OCI_ATTR_CHDES_ROW_OPFLAGS and OCI_ATTR_CHDES_ROW_ROWID.
OCIColl **
The following are attributes of the descriptor OCI_DTYPE_AQNFY.
OCI_ATTR_AQ_NTFN_GROUPING_COUNT
READ
For AQ namespace. Count of notifications received in the group.
ub4 *
OCI_ATTR_AQ_NTFN_GROUPING_ MSGID_ARRAY
READ
For AQ namespace. The group: an OCI Collection of message IDs.
OCIColl **
READ
Consumer name of the notification.
oratext *
READ
Message properties.
OCIAQMsgProperties **
READ
0 = regular, 1 = timeout notification, 2 = grouping notification.
ub4 *
READ
Message ID.
OCIRaw *
READ
The queue name of the notification.
oratext *
This section describes OCI_DTYPE_CQDES attributes. See "OCI_DTYPE_CQDES" for more information.
The following attributes are used for the direct path loading handle.
See Also:
"Direct Path Loading Overview" and"Direct Path Loading of Object Types" for information about direct path loading and allocating the direct path handlesREAD
The operation that occurred on the query. It can be one of two values: OCI_EVENT_QUERYCHANGE (query result set change) or OCI_EVENT_DEREG (query unregistered).
ub4 *
READ
Query ID of the query that was invalidated.
ub8 *
READ
A collection of table continuous query descriptors describing DML or DDL operations on tables that caused the query result set change. Each element of the collection is of type OCI_DTYPE_TABLE_CHDES.
OCIColl *
The following attributes are used for the direct path context handle.
READ/WRITE
Sets the size of the stream transfer buffer. Default value is 64 KB.
ub4 */ub4 *
READ/WRITE
Default character set ID for the character data. Note that the character set ID can be overridden at the column level. If the character set ID is not specified at the column level or the table level, then the Global support environment setting is used.
ub2 */ub2 *
READ/WRITE
Default date format string for SQLT_CHR to DTYDAT conversions. Note that the date format string can be overridden at the column level. If date format string is not specified at the column level or the table level, then the Global Support environment setting is used.
oratext **/oratext *
OCI_ATTR_DIRPATH_DCACHE_DISABLE
READ/WRITE
Setting this attribute to 1 indicates that the date cache is to be disabled if exceeded. The default value is 0, which means that lookups in the cache continue on cache overflow.
See Also:
"Using a Date Cache in Direct Path Loading of Dates in OCI" for a complete description of this attribute and of the four following attributesub1 */ub1 *
READ
Queries the number of date cache hits.
ub4 *
OCI_ATTR_DIRPATH_DCACHE_MISSES
READ
Queries the current number of date cache misses.
ub4 *
READ
Queries the current number of entries in a date cache.
ub4 *
READ/WRITE
Sets the date cache size (in elements) for a table. To disable the date cache, set this to 0, which is the default value.
ub4 */ub4 *
OCI_ATTR_DIRPATH_INDEX_MAINT_METHOD
READ/WRITE
Performs index row insertion on a per-row basis.
Valid value is:
OCI_DIRPATH_INDEX_MAINT_SINGLE_ROW
ub1 */ub1 *
READ/WRITE
Mode of the direct path context:
OCI_DIRPATH_LOAD - Load operation (default)
OCI_DIRPATH_CONVERT - Convert-only operation
ub1 */ub1 *
OCI_ATTR_DIRPATH_NO_INDEX_ERRORS
READ/WRITE
When OCI_ATTR_DIRPATH_NO_INDEX_ERRORS is 1, indexes are not set as unusable at any time during the load. If any index errors are detected, the load is aborted. That is, no rows are loaded, and the indexes are left as is. The default is 0.
ub1 */ub1 *
READ/WRITE
The NOLOG attribute of each segment determines whether image redo or invalidation redo is generated:
0 - Use the attribute of the segment being loaded.
1 - No logging. Overrides DDL statement, if necessary.
ub1 */ub1 *
READ/WRITE
Indicates the object type of a substitutable object table:
OraText *obj_type; /* stores an object type name */
OCIAttrSet((void *)dpctx,
(ub4)OCI_HTYPE_DIRPATH_CTX,
(void *) obj_type,
(ub4)strlen((const char *) obj_type),
(ub4)OCI_ATTR_DIRPATH_OBJ_CONSTR, errhp);
oratext **/oratext *
READ/WRITE
Setting this value to 1 allows multiple load sessions to load the same segment concurrently. The default is 0 (not parallel).
ub1 */ub1 *
OCI_ATTR_DIRPATH_SKIPINDEX_METHOD
READ/WRITE
Indicates how the handling of unusable indexes is performed.
Valid values are:
OCI_DIRPATH_INDEX_MAINT_SKIP_UNUSABLE (skip unusable indexes)
OCI_DIRPATH_INDEX_MAINT_DONT_SKIP_UNUSABLE (do not skip unusable indexes)
OCI_DIRPATH_INDEX_MAINT_SKIP_ALL (skip all index maintenance)
ub1 */ub1 *
READ
Returns the handle to the parameter descriptor for the column list associated with the direct path context. The column list parameter descriptor can be retrieved after the number of columns is set with the OCI_ATTR_NUM_COLS attribute.
See Also:
"Accessing Column Parameter Attributes"OCIParam* *
READ/WRITE
Name of the table to be loaded into.
oratext**/oratext *
READ/WRITE
Number of columns being loaded in the table.
ub2 */ub2 *
READ/WRITE
Read: The number of rows loaded so far.
Write: The number of rows to be allocated for the direct path and the direct path function column arrays.
ub2 */ub2 *
READ/WRITE
Name of the schema where the table being loaded resides. If not specified, the schema defaults to that of the connected user.
oratext **/oratext *
READ/WRITE
Name of the partition or subpartition to be loaded. If not specified, the entire table is loaded. The name must be a valid partition or subpartition name that belongs to the table.
oratext **/oratext *
For further explanations of these attributes, see "Direct Path Function Context and Attributes".
READ/WRITE
Indicates the type of expression specified in OCI_ATTR_NAME in the function context of a nonscalar column.
Valid values are:
OCI_DIRPATH_EXPR_OBJ_CONSTR (the object type name of a column object)
OCI_DIRPATH_EXPR_REF_TBLNAME (table name of a reference object)
OCI_DIRPATH_EXPR_SQL (a SQL string to derive the column value)
ub1 */ub1 *
READ
Returns the handle to the parameter descriptor for the column list associated with the direct path function context. The column list parameter descriptor can be retrieved after the number of columns (number of attributes or arguments associated with the nonscalar column) is set with the OCI_ATTR_NUM_COLS attribute.
See Also:
"Accessing Column Parameter Attributes"OCIParam**
READ/WRITE
The object type name if the function context is describing a column object, a SQL function if the function context is describing a SQL string, or a reference table name if the function context is describing a REF column.
oratext **/oratext *
READ/WRITE
The number of the object attributes to load if the column is a column object, or the number of arguments to process if the column is a SQL string or a REF column. This parameter must be set before the column list can be retrieved.
ub2 */ub2 *
READ
The number of rows loaded so far.
ub4 *
The following attributes are used for the direct path function column array handle.
READ
Last column of the last row processed.
ub2 *
READ
Column dimension of the column array.
ub2 *
READ
Row dimension of the column array.
ub4 *
READ
Number of rows successfully converted in the last call to OCIDirPathColArrayToStream().
ub4 *
The following attributes are used for the direct path stream handle.
READ
Buffer address of the beginning of the stream data.
ub1 **
READ
Size of the stream data in bytes.
ub4 *
READ
Number of rows successfully loaded by the last OCIDirPathLoadStream() call.
ub4 *
READ
Offset into the stream buffer of the last processed row.
ub4 *
The application specifies which columns are to be loaded, and the external format of the data by setting attributes on each column parameter descriptor. The column parameter descriptors are obtained as parameters of the column parameter list by OCIParamGet(). The column parameter list of the table is obtained from the OCI_ATTR_LIST_COLUMNS attribute of the direct path context. If a column is nonscalar, then its column parameter list is obtained from the OCI_ATTR_LIST_COLUMNS attribute of its direct path function context.
Note that all parameters are 1-based.
The following code example illustrates the use of the direct path column parameter attributes for scalar columns. Before the attributes are accessed, you must first set the number of columns to be loaded and get the column parameter list from the OCI_ATTR_LIST_COLUMNS attribute.
See Also:
"Direct Path Load Examples for Scalar Columns" for the data structures defined in the listings...
/* set number of columns to be loaded */
OCI_CHECK(ctlp->errhp_ctl, OCI_HTYPE_ERROR, ociret, ctlp,
OCIAttrSet((void *)dpctx, (ub4)OCI_HTYPE_DIRPATH_CTX,
(void *)&tblp->ncol_tbl,
(ub4)0, (ub4)OCI_ATTR_NUM_COLS, ctlp->errhp_ctl));
/* get the column parameter list */
OCI_CHECK(ctlp->errhp_ctl, OCI_HTYPE_ERROR, ociret, ctlp,
OCIAttrGet((void *)dpctx, OCI_HTYPE_DIRPATH_CTX,
(void *)&ctlp->colLstDesc_ctl, (ub4 *)0,
OCI_ATTR_LIST_COLUMNS, ctlp->errhp_ctl));
Now you can set the parameter attributes.
/* set the attributes of each column by getting a parameter handle on each
* column, then setting attributes on the parameter handle for the column.
* Note that positions within a column list descriptor are 1-based. */
for (i = 0, pos = 1, colp = tblp->col_tbl, fldp = tblp->fld_tbl;
i < tblp->ncol_tbl;
i++, pos++, colp++, fldp++)
{
/* get parameter handle on the column */
OCI_CHECK(ctlp->errhp_ctl, OCI_HTYPE_ERROR, ociret, ctlp,
OCIParamGet((const void *)ctlp->colLstDesc_ctl,
(ub4)OCI_DTYPE_PARAM, ctlp->errhp_ctl,
(void **)&colDesc, pos));
colp->id_col = i; /* position in column array */
/* set external attributes on the column */
/* column name */
OCI_CHECK(ctlp->errhp_ctl, OCI_HTYPE_ERROR, ociret, ctlp,
OCIAttrSet((void *)colDesc, (ub4)OCI_DTYPE_PARAM,
(void *)colp->name_col,
(ub4)strlen((const char *)colp->name_col),
(ub4)OCI_ATTR_NAME, ctlp->errhp_ctl));
/* column type */
OCI_CHECK(ctlp->errhp_ctl, OCI_HTYPE_ERROR, ociret, ctlp,
OCIAttrSet((void *)colDesc, (ub4)OCI_DTYPE_PARAM,
(void *)&colp->exttyp_col, (ub4)0,
(ub4)OCI_ATTR_DATA_TYPE, ctlp->errhp_ctl));
/* max data size */
OCI_CHECK(ctlp->errhp_ctl, OCI_HTYPE_ERROR, ociret, ctlp,
OCIAttrSet((void *)colDesc, (ub4)OCI_DTYPE_PARAM,
(void *)&fldp->maxlen_fld, (ub4)0,
(ub4)OCI_ATTR_DATA_SIZE, ctlp->errhp_ctl));
if (colp->datemask_col) /* set column (input field) date mask */
{
OCI_CHECK(ctlp->errhp_ctl, OCI_HTYPE_ERROR, ociret, ctlp,
OCIAttrSet((void *)colDesc, (ub4)OCI_DTYPE_PARAM,
(void *)colp->datemask_col,
(ub4)strlen((const char *)colp->datemask_col),
(ub4)OCI_ATTR_DATEFORMAT, ctlp->errhp_ctl));
}
if (colp->prec_col)
{
OCI_CHECK(ctlp->errhp_ctl, OCI_HTYPE_ERROR, ociret, ctlp,
OCIAttrSet((void *)colDesc, (ub4)OCI_DTYPE_PARAM,
(void *)&colp->prec_col, (ub4)0,
(ub4)OCI_ATTR_PRECISION, ctlp->errhp_ctl));
}
if (colp->scale_col)
{
OCI_CHECK(ctlp->errhp_ctl, OCI_HTYPE_ERROR, ociret, ctlp,
OCIAttrSet((void *)colDesc, (ub4)OCI_DTYPE_PARAM,
(void *)&colp->scale_col, (ub4)0,
(ub4)OCI_ATTR_SCALE, ctlp->errhp_ctl));
}
if (colp->csid_col)
{
OCI_CHECK(ctlp->errhp_ctl, OCI_HTYPE_ERROR, ociret, ctlp,
OCIAttrSet((void *)colDesc, (ub4)OCI_DTYPE_PARAM,
(void *)&colp->csid_col, (ub4)0,
(ub4)OCI_ATTR_CHARSET_ID, ctlp->errhp_ctl));
}
/* free the parameter handle to the column descriptor */
OCI_CHECK((void *)0, 0, ociret, ctlp,
OCIDescriptorFree((void *)colDesc, OCI_DTYPE_PARAM));
}
...
READ/WRITE
Character set ID for character column. If not set, the character set ID defaults to the character set ID set in the direct path context.
ub2 */ub2 *
READ/WRITE
Maximum size in bytes of the external data for the column. This can affect conversion buffer sizes.
ub4 */ub4 *
READ/WRITE
Returns or sets the external data type of the column. Valid data types are:
SQLT_CHR
SQLT_DATE
SQLT_TIMESTAMP
SQLT_TIMESTAMP_TZ
SQLT_TIMESTAMP_LTZ
SQLT_INTERVAL_YM
SQLT_INTERVAL_DS
SQLT_CLOB
SQLT_BLOB
SQLT_INT
SQLT_UIN
SQLT_FLT
SQLT_PDN
SQLT_BIN
SQLT_NUM
SQLT_NTY
SQLT_REF
SQLT_VST
SQLT_VNU
ub2 */ub2 *
READ/WRITE
Date conversion mask for the column. If not set, the date format defaults to the date conversion mask set in the direct path context.
oratext **/oratext *
READ/WRITE
Indicates that the column to load into is an object table's object ID column.
ub1 */ub1 *
READ/WRITE
Indicates that the column to load into is a nested table's setid column.
ub1 */ub1 *
READ/WRITE
Returns or sets the name of the column that is being loaded. Initialize both the column name and the column name length to 0 before calling OCIAttrGet().
oratext **/oratext *
READ/WRITE
Returns or sets the precision.
ub1 */ub1 * for explicit describes
sb2 */sb2 * for implicit describes
READ/WRITE
Returns or sets the scale (number of digits to the right of the decimal point) for conversions from packed and zoned decimal input data types.
sb1 */sb1 *
The parameters for the shared system can be set and read using the OCIAttrSet() and OCIAttrGet() calls. The handle type to be used is the process handle OCI_HTYPE_PROC.
See Also:
"OCI_ATTR_SHARED_HEAPALLOC"The OCI_ATTR_MEMPOOL_APPNAME, OCI_ATTR_MEMPOOL_HOMENAME, and OCI_ATTR_MEMPOOL_INSTNAME attributes specify the application, home, and instance names that can be used together to map the process to the right shared pool area. If these attributes are not provided, internal default values are used. The following are valid settings of the attributes for specific behaviors:
Instance name, application name (unqualified): This allows only executables with a specific name to attach to the same shared subsystem. For example, this allows an OCI application named Office to connect to the same shared subsystem regardless of the directory Office resides in.
Instance name, home name: This allows a set of executables in a specific home directory to attach to the same instance of the shared subsystem. For example, this allows all OCI applications residing in the ORACLE_HOME directory to use the same shared subsystem.
Instance name, home name, application name (unqualified): This allows only a specific executable to attach to a shared subsystem. For example, this allows one application named Office in the ORACLE_HOME directory to attach to a given shared subsystem.
READ/WRITE
Executable name or fully qualified path name of the executable.
oratext *
READ/WRITE
Directory name where the executables that use the same shared subsystem instance are located.
oratext *
READ/WRITE
Any user-defined name to identify an instance of the shared subsystem.
oratext *
READ/WRITE
Size of the shared pool in bytes. This attribute is set as follows:
ub4 plsz = 1000000;
OCIAttrSet((void *)0, (ub4) OCI_HTYPE_PROC,
(void *)&plsz, (ub4) 0, (ub4) OCI_ATTR_POOL_SIZE, 0);
ub4 *
READ
Returns all the currently set process modes. The value read contains the OR'ed value of all the currently set OCI process modes. To determine if a specific mode is set, the value should be OR'ed with that mode. For example:
ub4 mode;
boolean is_shared;
OCIAttrGet((void *)0, (ub4)OCI_HTYPE_PROC,
(void *) &mode, (ub4 *) 0,
(ub4)OCI_ATTR_PROC_MODE, 0);
is_shared = mode | OCI_SHARED;
ub4 *
The OCIEvent handle encapsulates the attributes from the event payload. This handle is implicitly allocated before the event callback is called.
See Also:
"HA Event Notification"The event callback obtains the attributes of an event using OCIAttrGet() with the following attributes.
READ
When called with this attribute, OCIAttrGet() retrieves the name of the database domain that has been affected by this event. This is also a server handle attribute.
oratext **
READ
When called with this attribute, OCIAttrGet() retrieves the name of the database that has been affected by this event. This is also a server handle attribute.
oratext **
READ
The type of event that occurred, OCI_EVENTTYPE_HA.
ub4 *
READ
If the event type is OCI_EVENTTYPE_HA, get the source of the event with this attribute. Valid values are:
OCI_HA_SOURCE_DATABASE
OCI_HA_SOURCE_NODE
OCI_HA_SOURCE_INSTANCE
OCI_HA_SOURCE_SERVICE
OCI_HA_SOURCE_SERVICE_MEMBER
OCI_HA_SOURCE_ASM_INSTANCE
OCI_HA_SOURCE_SERVICE_PRECONNECT
ub4 *
READ
When called with this attribute, OCIAttrGet() retrieves the first server handle in the list of server handles affected by an Oracle Real Application Clusters (Oracle RAC) HA DOWN event.
OCIServer **
READ
When called with this attribute OCIAttrGet() retrieves the next server handle in the list of server handles affected by an Oracle RAC HA DOWN event.
OCIServer **
READ
Valid value is OCI_HA_STATUS_DOWN. Only DOWN events are subscribed to currently.
ub4 *
READ
The time that the HA event occurred.
OCIDateTime **
READ
When called with this attribute, OCIAttrGet() retrieves the name of the host that has been affected by this event.
oratext **
READ
When called with this attribute, OCIAttrGet() retrieves the name of the instance that has been affected by this event. This is also a server handle attribute.
oratext **
READ
When called with this attribute, OCIAttrGet() retrieves the start time of the instance that has been affected by this event. This is also a server handle attribute.
OCIDateTime **
READ
When called with this attribute, OCIAttrGet() retrieves the name of the service that has been affected by this event. The name length is ub4 *. This is also a server handle attribute.
oratext **
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