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Oracle® Database PL/SQL Packages and Types Reference
11g Release 2 (11.2)

Part Number E16760-04
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247 Logical Change Record TYPEs

This chapter describes the logical change record (LCR) types.

This chapter contains these topics:


Using Logical Change Record Types

This section contains topics that relate to using the logical change record (LCR) types.


Overview

In Oracle Streams, logical change records (LCRs) are message payloads that contain information about changes to a database. These changes can include changes to the data, which are data manipulation language (DML) changes, and changes to database objects, which are data definition language (DDL) changes.

When you use Oracle Streams, the capture process captures changes in the form of LCRs and enqueues them into a queue. These LCRs can be propagated from a queue in one database to a queue in another database. Finally, the apply process can apply LCRs at a destination database. You also have the option of creating, enqueuing, and dequeuing LCRs manually.

See Also:

Oracle Streams Concepts and Administration for more information about LCRs

Security Model

PUBLIC is granted EXECUTE privilege on the types described in this chapter.


Summary of Logical Change Record Types

Table 247-1 Logical Change Record (LCR) Types

Type Description

LCR$_DDL_RECORD Type

Represents a data definition language (DDL) change to a database object

LCR$_ROW_RECORD Type

Represents a data manipulation language (DML) change to a database object

LCR$_ROW_LIST Type

Identifies a list of column values for a row in a table

LCR$_ROW_UNIT Type

Identifies the value for a column in a row


These logical change record (LCR) types can be used with the following Oracle-supplied PL/SQL packages:


LCR$_DDL_RECORD Type

This type represents a data definition language (DDL) change to a database object.

If you create or modify a DDL logical change record (DDL LCR), then make sure the ddl_text is consistent with the base_table_name, base_table_owner, object_type, object_owner, object_name, and command_type attributes.

This section contains information about the constructor for DDL LCRs and information about the member subprograms for this type:

LCR$_DDL_RECORD Constructor

Creates a SYS.LCR$_DDL_RECORD object with the specified information.

STATIC FUNCTION CONSTRUCT(
   source_database_name  IN  VARCHAR2,
   command_type          IN  VARCHAR2,
   object_owner          IN  VARCHAR2,
   object_name           IN  VARCHAR2,
   object_type           IN  VARCHAR2,
   ddl_text              IN  CLOB,
   logon_user            IN  VARCHAR2,
   current_schema        IN  VARCHAR2,
   base_table_owner      IN  VARCHAR2,
   base_table_name       IN  VARCHAR2,
   tag                   IN  RAW       DEFAULT NULL,
   transaction_id        IN  VARCHAR2  DEFAULT NULL,
   scn                   IN  NUMBER    DEFAULT NULL,
   position              IN  RAW       DEFAULT NULL,
   edition_name          IN  VARCHAR2  DEFAULT NULL)
RETURN SYS.LCR$_DDL_RECORD;

LCR$_DDL_RECORD Constructor Function Parameters

Table 247-2 Constructor Function Parameters for LCR$_DDL_RECORD

Parameter Description

source_database_name

The database where the DDL statement occurred

If you do not include the domain name, then the function appends the local domain to the database name automatically. For example, if you specify DBS1 and the local domain is EXAMPLE.COM, then the function specifies DBS1.EXAMPLE.COM automatically. Set this parameter to a non-NULL value.

command_type

The type of command executed in the DDL statement

Set this parameter to a non-NULL value.

See Also: The "SQL Command Codes" table in the Oracle Call Interface Programmer's Guide for a complete list of command types

The following command types are not supported in DDL LCRs:

ALTER MATERIALIZED VIEW
ALTER MATERIALIZED VIEW LOG
ALTER SUMMARY
CREATE SCHEMA
CREATE MATERIALIZED VIEW
CREATE MATERIALIZED VIEW LOG
CREATE SUMMARY
DROP MATERIALIZED VIEW
DROP MATERIALIZED VIEW LOG
DROP SUMMARY
RENAME

The snapshot equivalents of the materialized view command types are also not supported.

object_owner

The user who owns the object on which the DDL statement was executed

object_name

The database object on which the DDL statement was executed

object_type

The type of object on which the DDL statement was executed

The following are valid object types:

CLUSTER
FUNCTION
INDEX
LINK
OUTLINE
PACKAGE
PACKAGE BODY
PROCEDURE
SEQUENCE
SYNONYM
TABLE
TRIGGER
TYPE
USER
VIEW

LINK represents a database link.

NULL is also a valid object type. Specify NULL for all object types not listed. The GET_OBJECT_TYPE member procedure returns NULL for object types not listed.

ddl_text

The text of the DDL statement

Set this parameter to a non-NULL value.

logon_user

The user whose session executed the DDL statement

current_schema

The schema that is used if no schema is specified explicitly for the modified database objects in ddl_text

If a schema is specified in ddl_text that differs from the one specified for current_schema, then the function uses the schema specified in ddl_text.

Set this parameter to a non-NULL value.

base_table_owner

If the DDL statement is a table-related DDL (such as CREATE TABLE and ALTER TABLE), or if the DDL statement involves a table (such as creating a trigger on a table), then base_table_owner specifies the owner of the table involved. Otherwise, base_table_owner is NULL.

base_table_name

If the DDL statement is a table-related DDL (such as CREATE TABLE and ALTER TABLE), or if the DDL statement involves a table (such as creating a trigger on a table), then base_table_name specifies the name of the table involved. Otherwise, base_table_name is NULL.

tag

A binary tag that enables tracking of the LCR

For example, this tag can be used to determine the original source database of the DDL statement if apply forwarding is used.

See Also: Oracle Streams Replication Administrator's Guide

transaction_id

The identifier of the transaction

scn

The SCN at the time when the change record for a captured LCR was written to the redo log

The SCN value is meaningless for a user-created LCR.

position

The position of the LCR

LCR position is commonly used in XStream configurations. Using XStream requires purchasing a license for the Oracle GoldenGate product.

See Also: Oracle Database XStream Guide

edition_name

The name of the edition in which the DDL statement was executed


Summary of LCR$_DDL_RECORD Subprograms

Table 247-3 LCR$_DDL_RECORD Type Subprograms

Subprogram Description

EXECUTE Member Procedure

Executes the LCR under the security domain of the current user

GET_BASE_TABLE_NAME Member Function

Gets the base (dependent) table name

GET_BASE_TABLE_OWNER Member Function

Gets the base (dependent) table owner

GET_CURRENT_SCHEMA Member Function

Gets the default schema (user) name

GET_DDL_TEXT Member Procedure

Gets the DDL text in a CLOB

GET_EDITION_NAME Member Function

Gets the name of the edition in which the DDL statement was executed

GET_LOGON_USER Member Function

Gets the logon user name

GET_OBJECT_TYPE Member Function

Gets the type of the object involved for the DDL

SET_BASE_TABLE_NAME Member Procedure

Sets the base (dependent) table name

SET_BASE_TABLE_OWNER Member Procedure

Sets the base (dependent) table owner

SET_CURRENT_SCHEMA Member Procedure

Sets the default schema (user) name

SET_DDL_TEXT Member Procedure

Sets the DDL text

SET_EDITION_NAME Member Procedure

Sets the name of the edition in which the DDL statement was executed

SET_LOGON_USER Member Procedure

Sets the logon user name

SET_OBJECT_TYPE Member Procedure

Sets the object type

Common Subprograms

See "Common Subprograms for LCR$_DDL_RECORD and LCR$_ROW_RECORD" for a list of subprograms common to the SYS.LCR$_ROW_RECORD and SYS.LCR$_DDL_RECORD types


EXECUTE Member Procedure

Executes the DDL LCR under the security domain of the current user. Apply handlers are not run when the LCR is applied using this procedure.

Note:

The EXECUTE member procedure can be invoked only in an apply handler for an Oracle Streams apply process.

Syntax

MEMBER PROCEDURE EXECUTE;

GET_BASE_TABLE_NAME Member Function

Gets the base (dependent) table name.

Syntax

MEMBER FUNCTION GET_BASE_TABLE_NAME()
RETURN VARCHAR2;

GET_BASE_TABLE_OWNER Member Function

Gets the base (dependent) table owner.

Syntax

MEMBER FUNCTION GET_BASE_TABLE_OWNER() 
RETURN VARCHAR2;

GET_CURRENT_SCHEMA Member Function

Gets the current schema name.

Syntax

MEMBER FUNCTION GET_CURRENT_SCHEMA() 
RETURN VARCHAR2;

GET_DDL_TEXT Member Procedure

Gets the DDL text in a CLOB.

For example, the following PL/SQL code uses this procedure to get the DDL text in a DDL LCR:

CREATE OR REPLACE PROCEDURE ddl_in_lcr (ddl_lcr in SYS.LCR$_DDL_RECORD)
IS
  ddl_text   CLOB;
BEGIN
  DBMS_OUTPUT.PUT_LINE( '  -----------------------------------------' ); 
  DBMS_OUTPUT.PUT_LINE( '  Displaying DDL text in a DDL LCR: ' );
  DBMS_OUTPUT.PUT_LINE( '  -----------------------------------------' ); 
  DBMS_LOB.CREATETEMPORARY(ddl_text, true);
  ddl_lcr.GET_DDL_TEXT(ddl_text);
  DBMS_OUTPUT.PUT_LINE('DDL text:' || ddl_text);
  DBMS_LOB.FREETEMPORARY(ddl_text);
END;
/

Note:

GET_DDL_TEXT is a member procedure and not a member function to make it easier for you to manage the space used by the CLOB. Notice that the previous example creates temporary space for the CLOB and then frees the temporary space when it is no longer needed.

Syntax

MEMBER FUNCTION GET_DDL_TEXT(
  ddl_text  IN/OUT  CLOB);

Parameter

Table 247-4 GET_DDL_TEXT Procedure Parameter

Parameter Description

ddl_text

The DDL text in the DDL LCR


GET_EDITION_NAME Member Function

Gets the name of the edition in which the DDL statement was executed.

Syntax

MEMBER FUNCTION GET_EDITION_NAME() 
RETURN VARCHAR2;

GET_LOGON_USER Member Function

Gets the logon user name.

Syntax

MEMBER FUNCTION GET_LOGON_USER() 
RETURN VARCHAR2;

GET_OBJECT_TYPE Member Function

Gets the type of the object involved for the DDL.

Syntax

MEMBER FUNCTION GET_OBJECT_TYPE() 
RETURN VARCHAR2;

SET_BASE_TABLE_NAME Member Procedure

Sets the base (dependent) table name.

Syntax

MEMBER PROCEDURE SET_BASE_TABLE_NAME(
   base_table_name  IN  VARCHAR2);

Parameter

Table 247-5 SET_BASE_TABLE_NAME Procedure Parameter

Parameter Description

base_table_name

The name of the base table


SET_BASE_TABLE_OWNER Member Procedure

Sets the base (dependent) table owner.

Syntax

MEMBER PROCEDURE SET_BASE_TABLE_OWNER(
   base_table_owner  IN  VARCHAR2);

Parameter

Table 247-6 SET_BASE_TABLE_OWNER Procedure Parameter

Parameter Description

base_table_owner

The name of the base owner


SET_CURRENT_SCHEMA Member Procedure

Sets the default schema (user) name.

Syntax

MEMBER PROCEDURE SET_CURRENT_SCHEMA(
   current_schema  IN  VARCHAR2);

Parameter

Table 247-7 SET_CURRENT_SCHEMA Procedure Parameter

Parameter Description

current_schema

The name of the schema to set as the current schema

Set this parameter to a non-NULL value.


SET_DDL_TEXT Member Procedure

Sets the DDL text.

Syntax

MEMBER PROCEDURE SET_DDL_TEXT(
   ddl_text  IN  CLOB);

Parameter

Table 247-8 SET_DDL_TEXT Procedure Parameter

Parameter Description

ddl_text

The DDL text

Set this parameter to a non-NULL value.


SET_EDITION_NAME Member Procedure

Sets the name of the edition in which the DDL statement was executed.

Syntax

MEMBER PROCEDURE SET_EDITION_NAME(
   edition_name  IN  VARCHAR2);

Parameter

Table 247-9 SET_EDITION_NAME Procedure Parameter

Parameter Description

edition_name

Name of the edition


SET_LOGON_USER Member Procedure

Sets the logon user name.

Syntax

MEMBER PROCEDURE SET_LOGON_USER(
   logon_user  IN  VARCHAR2);

Parameter

Table 247-10 SET_LOGON_USER Procedure Parameter

Parameter Description

logon_user

The name of the schema to set as the logon user


SET_OBJECT_TYPE Member Procedure

Sets the object type.

Syntax

MEMBER PROCEDURE SET_OBJECT_TYPE(
   object_type  IN  VARCHAR2);

Parameter

Table 247-11 SET_OBJECT_TYPE Procedure Parameter

Parameter Description

object_type

The object type

The following are valid object types:

CLUSTER
FUNCTION
INDEX
LINK
OUTLINE
PACKAGE
PACKAGE BODY
PROCEDURE
SEQUENCE
SYNONYM
TABLE
TRIGGER
TYPE
USER
VIEW

LINK represents a database link.

NULL is also a valid object type. Specify NULL for all object types not listed. The GET_OBJECT_TYPE member procedure returns NULL for object types not listed.



LCR$_ROW_RECORD Type

This type represents a data manipulation language (DML) change to a row in a table. This type uses the LCR$_ROW_LIST type.

If you create or modify a row logical change record (row LCR), then make sure the command_type attribute is consistent with the presence or absence of old column values and the presence or absence of new column values.

This section contains information about the constructor for DDL LCRs and information about the member subprograms for this type:

LCR$_ROW_RECORD Constructor

Creates a SYS.LCR$_ROW_RECORD object with the specified information.

STATIC FUNCTION CONSTRUCT(
   source_database_name  IN  VARCHAR2,
   command_type          IN  VARCHAR2,
   object_owner          IN  VARCHAR2,
   object_name           IN  VARCHAR2,
   tag                   IN  RAW                DEFAULT NULL,
   transaction_id        IN  VARCHAR2           DEFAULT NULL,
   scn                   IN  NUMBER             DEFAULT NULL,
   old_values            IN  SYS.LCR$_ROW_LIST  DEFAULT NULL,
   new_values            IN  SYS.LCR$_ROW_LIST  DEFAULT NULL,
   position              IN  RAW                DEFAULT NULL,
   statement             IN  VARCHAR2           DEFAULT NULL,
   bind_variables        IN  SYS.LCR$_ROW_LIST  DEFAULT NULL,
   bind_by_position      IN  VARCHAR2           DEFAULT 'N')
RETURN SYS.LCR$_ROW_RECORD;

LCR$_ROW_RECORD Constructor Function Parameters

Table 247-12 Constructor Function Parameters for LCR$_ROW_RECORD

Parameter Description

source_database_name

The database where the row change occurred

If you do not include the domain name, then the function appends the local domain to the database name automatically. For example, if you specify DBS1 and the local domain is EXAMPLE.COM, then the function specifies DBS1.EXAMPLE.COM automatically. Set this parameter to a non-NULL value.

command_type

The type of command executed in the DML statement

Set this parameter to a non-NULL value.

Valid values are the following:

INSERT
UPDATE
DELETE
LOB ERASE
LOB WRITE
LOB TRIM

If INSERT, then ensure that the LCR has a new_values collection that is not empty and an empty or NULL old_values collection.

If UPDATE, then ensure that the LCR has a new_values collection that is not empty and an old_values collection that is not empty.

If DELETE, then ensure that the LCR has a NULL or empty new_values collection and an old_values collection that is not empty.

If LOB ERASE, LOB WRITE, or LOB TRIM, then ensure that the LCR has a new_values collection that is not empty and an empty or NULL old_values collection.

object_owner

The user who owns the table on which the row change occurred

Set this parameter to a non-NULL value.

object_name

The table on which the DML statement was executed

Set this parameter to a non-NULL value.

tag

A binary tag that enables tracking of the LCR

For example, this tag can be used to determine the original source database of the DML change when apply forwarding is used.

See Also: Oracle Streams Replication Administrator's Guide

transaction_id

The identifier of the transaction

scn

The SCN at the time when the change record was written to the redo log

The SCN value is meaningless for a user-created LCR.

old_values

The column values for the row before the DML change

If the DML statement is an UPDATE or a DELETE statement, then this parameter contains the values of columns in the row before the DML statement. If the DML statement is an INSERT statement, then there are no old values.

new_values

The column values for the row after the DML change

If the DML statement is an UPDATE or an INSERT statement, then this parameter contains the values of columns in the row after the DML statement. If the DML statement is a DELETE statement, then there are no new values.

If the LCR reflects a LOB operation, then this parameter contains the supplementally logged columns and any relevant LOB information.

position

The position of the LCR

LCR position is commonly used in XStream configurations. Using XStream requires purchasing a license for the Oracle GoldenGate product.

See Also: Oracle Database XStream Guide

statement

This parameter is reserved for internal use only.

bind_variables

This parameter is reserved for internal use only.

bind_by_position

This parameter is reserved for internal use only.


Note:

Starting with Oracle Database 11g Release 2 (11.2.0.2), this constructor function includes the following new parameters: statement, bind_variables, and bind_by_position.

Summary of LCR$_ROW_RECORD Subprograms

Table 247-13 LCR$_ROW_RECORD Type Subprograms

Subprogram Description

ADD_COLUMN Member Procedure

Adds the value as old or new, depending on the value type specified, for the column

CONVERT_LONG_TO_LOB_CHUNK Member Procedure

Converts LONG data in a row LCR into fixed width CLOB, or converts LONG RAW data in a row LCR into a BLOB

DELETE_COLUMN Member Procedure

Deletes the old value, the new value, or both, for the specified column, depending on the value type specified

EXECUTE Member Procedure

Executes the LCR under the security domain of the current user

GET_LOB_INFORMATION Member Function

Gets the LOB information for the column

GET_LOB_OFFSET Member Function

Gets the LOB offset for the specified column

GET_LOB_OPERATION_SIZE Member Function

Gets the operation size for the LOB column

GET_LONG_INFORMATION Member Function

Gets the LONG information for the column

GET_ROW_TEXT Member Procedure

Gets the SQL statement for the change that is encapsulated in the LCR

GET_VALUE Member Function

Gets the old or new value for the specified column, depending on the value type specified

GET_VALUES Member Function

Gets a list of old or new values, depending on the value type specified

GET_WHERE_CLAUSE Member Procedure

Gets a WHERE clause for the change that is encapsulated in the row LCR

GET_XML_INFORMATION Member Function

Gets the XML information for the specified column

IS_STATEMENT_LCR Member Function

Reserved for internal use only

KEEP_COLUMNS Member Procedure

Keeps a list of columns a row LCR

RENAME_COLUMN Member Procedure

Renames a column in an LCR

SET_LOB_INFORMATION Member Procedure

Sets LOB information for the column

SET_LOB_OFFSET Member Procedure

Sets the LOB offset for the specified column

SET_LOB_OPERATION_SIZE Member Procedure

Sets the operation size for the LOB column

SET_ROW_TEXT Member Procedure

Reserved for internal use only

SET_VALUE Member Procedure

Overwrites the value of the specified column

SET_VALUES Member Procedure

Replaces the existing old or new values for the LCR, depending on the value type specified

SET_XML_INFORMATION Member Procedure

Sets the XML information for the column

Common Subprograms

See Common Subprograms for LCR$_DDL_RECORD and LCR$_ROW_RECORD for a list of subprograms common to the SYS.LCR$_ROW_RECORD and SYS.LCR$_DDL_RECORD types


ADD_COLUMN Member Procedure

Adds the value as old or new, depending on the value type specified, for the column. An error is raised if a value of the same type already exists for the column.

Note:

To set a column value that already exists, run SET_VALUE.

Considerations for LOB Columns

When processing a row LCR with LOB columns with a procedure DML handler or error handler and the handler is using LOB assembly (the assemble_lobs parameter is set to TRUE for the handler), you use this member procedure in the handler procedure to add a LOB column to a row LCR. If assemble_lobs is set to FALSE for the handler, then you cannot use this member procedure to add a LOB column to a row LCR.

To use a DML or error handler to add a LOB column, specify the LOB locator for the column_value parameter in the member procedure. The ADD_COLUMN member procedure verifies that an ANYDATA encapsulated LOB locator is processed with a DML or error handler that is using LOB assembly. An error is raised under the following conditions:

If an error is raised because of one of these conditions, then the transaction that includes the row LCR is moved to the error queue, and the LOB is represented by the original (nonassembled) row LCRs.

Note:

  • Database compatibility must be 10.2.0 or higher to use LOB assembly.

  • When you are processing a row LCR with a rule-based transformation, you cannot use this member procedure to add a LOB column.

  • When you are processing a row LCR with a rule-based transformation, procedure DML handler, or error handler, you cannot use this member procedure to add a LONG or LONG RAW column.

Syntax

MEMBER PROCEDURE ADD_COLUMN(
   value_type    IN  VARCHAR2,
   column_name   IN  VARCHAR2,
   column_value  IN  ANYDATA);

Parameters

Table 247-14 ADD_COLUMN Procedure Parameters

Parameter Description

value_type

The type of value to add for the column

Specify old to add the old value of the column. Specify new to add the new value of the column.

column_name

The column name

This name is not validated. An error can be raised during application of the LCRs if an invalid name is specified.

column_value

The value of the column

If NULL, then this procedure raises an error.

If the member procedure is used in a procedure DML handler or error handler that uses LOB assembly, then a LOB locator can be specified.

A NULL column value can be specified by encapsulating the NULL value in an ANYDATA wrapper.


CONVERT_LONG_TO_LOB_CHUNK Member Procedure

Converts LONG data in a row LCR into a CLOB, or converts LONG RAW data in a row LCR into a BLOB.

This procedure can change the operation code from LONG WRITE to LOB WRITE for the row LCR.

This member procedure can be used in rule-based transformations.

The following restrictions apply to this member procedure:

Syntax

MEMBER PROCEDURE CONVERT_LONG_TO_LOB_CHUNK;

DELETE_COLUMN Member Procedure

Deletes the old value, the new value, or both, for the specified column, depending on the value type specified.

Syntax

MEMBER PROCEDURE DELETE_COLUMN(
   column_name  IN  VARCHAR2,
   value_type   IN  VARCHAR2  DEFAULT '*');

Parameters

Table 247-15 DELETE_COLUMN Procedure Parameters

Parameter Description

column_name

The column name

An error is raised if the column does not exist in the LCR.

value_type

The type of value to delete for the column

Specify old to delete the old value of the column. Specify new to delete the new value of the column. If * is specified, then the procedure deletes both the old and new values.


EXECUTE Member Procedure

Executes the row LCR under the security domain of the current user. Any apply handlers that would be run for an LCR are not run when the LCR is applied using this procedure.

This member procedure can be run on a row LCR under any of the following conditions:

Note:

Do not run this member procedure in a custom rule-based transformation on a row LCR. Doing so could execute the row LCR outside of its transactional context.

Considerations for LOB Columns

When processing a row LCR with LOB columns with a procedure DML handler or error handler, and the handler is using LOB assembly (the assemble_lobs parameter is set to TRUE for the handler), this member procedure executes the assembled row LCR. An assembled row LCR represents a LOB value with a LOB locator or NULL.

If assemble_lobs is set to FALSE for the handler, then this member procedure executes the nonassembled row LCRs. Nonassembled row LCRs represent LOB values with VARCHAR2 and RAW data types. These nonassembled row LCRs might have been modified by the handler.

An error is raised under the following conditions:

If an error is raised because of one of these conditions, then the transaction that includes the row LCR is moved to the error queue, and the LOB is represented by the original (nonassembled) row LCRs.

Syntax

MEMBER PROCEDURE EXECUTE(
   conflict_resolution  IN  BOOLEAN);

Parameters

Table 247-16 EXECUTE Procedure Parameters

Parameter Description

conflict_resolution

If TRUE, then any conflict resolution defined for the table using the SET_UPDATE_CONFLICT_HANDLER procedure in the DBMS_APPLY_ADM package is used to resolve conflicts resulting from the execution of the LCR.

If FALSE, then conflict resolution is not used.

An error is raised if this parameter is not specified or is set to NULL.


GET_LOB_INFORMATION Member Function

Gets the LOB information for the column.

The return value can be one of the following:

DBMS_LCR.NOT_A_LOB        CONSTANT NUMBER := 1;
DBMS_LCR.NULL_LOB         CONSTANT NUMBER := 2;
DBMS_LCR.INLINE_LOB       CONSTANT NUMBER := 3;
DBMS_LCR.EMPTY_LOB        CONSTANT NUMBER := 4;
DBMS_LCR.LOB_CHUNK        CONSTANT NUMBER := 5;
DBMS_LCR.LAST_LOB_CHUNK   CONSTANT NUMBER := 6;

Returns NULL if the specified column does not exist.

If the command type of the row LCR is UPDATE, then specifying 'Y' for the use_old parameter is a convenient way to get the value of the columns.

Syntax

MEMBER FUNCTION GET_LOB_INFORMATION(
  value_type   IN  VARCHAR2,
  column_name  IN  VARCHAR2,
  use_old      IN  VARCHAR2  DEFAULT 'Y') 
RETURN NUMBER;

Parameters

Table 247-17 GET_LOB_INFORMATION Function Parameters

Parameter Description

value_type

The type of value to return for the column, either old or new

column_name

The name of the column

use_old

If Y and value_type is new, and no new value exists, then the function returns the corresponding old value. If N and value_type is new, then the function does not return the old value if no new value exists.

If value_type is old or if the command_type of the row LCR is not UPDATE, then the function ignores the value of the use_old parameter.

NULL is not a valid specification for the use_old parameter.


GET_LOB_OFFSET Member Function

Gets the LOB offset for the specified column in the number of characters for CLOB columns and the number of bytes for BLOB columns. Returns a non-NULL value only if all of the following conditions are met:

Otherwise, returns NULL.

Syntax

GET_LOB_OFFSET(
   value_type   IN  VARCHAR2,
   column_name  IN  VARCHAR2) 
RETURN NUMBER;

Parameters

Table 247-18 GET_LOB_OFFSET Procedure Parameters

Parameter Description

value_type

The type of value to return for the column

Currently, only new can be specified.

column_name

The name of the LOB column


GET_LOB_OPERATION_SIZE Member Function

Gets the operation size for the LOB column in the number of characters for CLOB columns and the number of bytes for BLOB columns. Returns a non-NULL value only if all of the following conditions are met:

Otherwise, returns NULL.

Syntax

MEMBER FUNCTION GET_LOB_OPERATION_SIZE(
  value_type   IN  VARCHAR2,
  column_name  IN  VARCHAR2) 
RETURN NUMBER,

Parameters

Table 247-19 GET_LOB_OPERATION_SIZE Function Parameters

Parameter Description

value_type

The type of value to return for the column

Currently, only new can be specified.

column_name

The name of the LOB column


GET_LONG_INFORMATION Member Function

Gets the LONG information for the column.

The return value can be one of the following:

DBMS_LCR.NOT_A_LONG        CONSTANT NUMBER := 1;
DBMS_LCR.NULL_LONG         CONSTANT NUMBER := 2;
DBMS_LCR.INLINE_LONG       CONSTANT NUMBER := 3;
DBMS_LCR.LONG_CHUNK        CONSTANT NUMBER := 4;
DBMS_LCR.LAST_LONG_CHUNK   CONSTANT NUMBER := 5;

Returns NULL if the specified column does not exist.

If the command type of the row LCR is UPDATE, then specifying 'Y' for the use_old parameter is a convenient way to get the value of the columns.

Syntax

MEMBER FUNCTION GET_LONG_INFORMATION(
  value_type   IN  VARCHAR2,
  column_name  IN  VARCHAR2,
  use_old      IN  VARCHAR2  DEFAULT 'Y') 
RETURN NUMBER;

Parameters

Table 247-20 GET_LONG_INFORMATION Function Parameters

Parameter Description

value_type

The type of value to return for the column, either old or new

column_name

The name of the column

use_old

If Y and value_type is new, and no new value exists, then the function returns the corresponding old value. If N and value_type is new, then the function does not return the old value if no new value exists.

If value_type is old or if the command_type of the row LCR is not UPDATE, then the function ignores the value of the use_old parameter.

NULL is not a valid specification for the use_old parameter.


GET_ROW_TEXT Member Procedure

Gets the SQL statement for the change that is encapsulated in the row LCR. This method performs SQL generation in PL/SQL.

This method is overloaded. The different functionality of each form of syntax is presented along with the definitions.

Syntax

The following procedure returns the SQL statement in a CLOB data type.

MEMBER PROCEDURE GET_ROW_TEXT(
   row_text  IN/OUT  CLOB);

The following procedure returns the SQL statement with bind variables in a CLOB data type.

MEMBER PROCEDURE GET_ROW_TEXT(
   row_text         IN/OUT  CLOB,
   variable_list    IN/OUT  LCR$_ROW_LIST,
   bind_var_syntax  IN      VARCHAR2  DEFAULT ':');

Parameters

Table 247-21 GET_ROW_TEXT Procedure Parameters

Parameter Description

row_text

The SQL statement for the change that is encapsulated in the LCR

variable_list

The values for the bind variables in the order of the bind variables

bind_var_syntax

The syntax for the bind variables

One of the following values is valid:

  • Specify :, the default, for bind values to be in the form :1, :2, and so on.

  • Specify ? for bind values to be in the form ?.


GET_VALUE Member Function

Gets the old or new value for the specified column, depending on the value type specified.

If the command type of the row LCR is UPDATE, then specifying 'Y' for the use_old parameter is a convenient way to get the value of a column.

Syntax

MEMBER FUNCTION GET_VALUE(
   value_type   IN  VARCHAR2,
   column_name  IN  VARCHAR2,
   use_old      IN  VARCHAR2  DEFAULT 'Y') 
RETURN ANYDATA;

Parameters

Table 247-22 GET_VALUE Function Parameters

Parameter Description

value_type

The type of value to return for the column

Specify old to get the old value for the column. Specify new to get the new value for the column.

column_name

The column name

If the column is present and has a NULL value, then the function returns an ANYDATA instance containing a NULL value. If the column value is absent, then the function returns a NULL.

use_old

If Y and value_type is new, and no new value exists, then the function returns the corresponding old value.

If N and value_type is new, then the function returns NULL if no new value exists.

If value_type is old or if the command_type of the row LCR is not UPDATE, then the function ignores the value of the use_old parameter.

NULL is not a valid specification for the use_old parameter.


GET_VALUES Member Function

Gets a list of old or new values, depending on the value type specified.

If the command type of the row LCR is UPDATE, then specifying 'Y' for the use_old parameter is a convenient way to get the values of all columns.

Syntax

MEMBER FUNCTION GET_VALUES(
   value_type  IN  VARCHAR2,
   use_old     IN  VARCHAR2  DEFAULT 'Y')
RETURN SYS.LCR$_ROW_LIST;

Parameters

Table 247-23 GET_VALUES Function Parameters

Parameter Description

value_type

The type of values to return

Specify old to return a list of old values. Specify new to return a list of new values.

use_old

If Y and value_type is new, then the function returns a list of all new values in the LCR. If a new value does not exist in the list, then the function returns the corresponding old value. Therefore, the returned list contains all existing new values and the old values where there are no new values.

If N and value_type is new, then the function returns a list of all new values in the LCR without returning any old values.

If value_type is old or if the command_type of the row LCR is not UPDATE, then the function ignores the value of the use_old parameter.

NULL is not a valid specification for the use_old parameter.


GET_WHERE_CLAUSE Member Procedure

Gets a WHERE clause for the change that is encapsulated in the row LCR.

Use the WHERE clause returned by GET_WHERE_CLAUSE instead of using the ROWID, because the ROWID is not ANSI compatible. The generated WHERE clause might not match the WHERE clause in the original DML operation.

The ROWID of an INSERT statement is the ROWID of the new row created by the INSERT. The WHERE clause generated for an INSERT operation identifies the new row. Therefore, the generated WHERE clause includes all of the new values inserted.

For example, consider the following insert into the hr.departments table:

INSERT INTO hr.departments (
   department_id, department_name, manager_id, location_id) 
   VALUES (10, 'HR', 20, 40);

The generated WHERE clause represents the row with the values 10, 'HR', 20, and 40. Hence, the generated WHERE clause is the following:

WHERE "DEPARTMENT_ID" = 10 AND "DEPARTMENT_NAME" = 'HR' AND
      "MANAGER_ID" = 20 AND "LOCATION_ID" = 40

The ROWID of an UPDATE statement is the ROWID of the row that was updated. The WHERE clause generated for an UPDATE operation identifies the row after the UPDATE executes. The generated WHERE clause is based on the old and new values of the UPDATE.

For example, consider the following update to the hr.departments table:

UPDATE hr.departments SET department_name='Management'
 WHERE department_name='Administration' AND location_id = 20 AND
       manager_id = 30 AND department_id = 10;

The values of the row after the UPDATE are 10, 'Management', 30, and 20. Hence, the generated WHERE clause to identify the row is the following:

WHERE "DEPARTMENT_ID" = 10 AND "DEPARTMENT_NAME" = 'MANAGEMENT' AND
      "MANAGER_ID" = 30 AND "LOCATION_ID" = 20

Notice that the new value is used for "DEPARTMENT_NAME", because the new value is the value of the column after the UPDATE. For the rest of the columns, the old values are used.

The ROWID of a DELETE operation is the row that existed before it was deleted. The generated WHERE clause consists of all the old column values present in the DELETE operation.

LOB columns do not appear in generated WHERE clauses. The generated WHERE clause is not affected by the presence of LOB columns in the LCR.

This method is overloaded. The different functionality of each form of syntax is presented along with the definitions.

Syntax

The following procedure returns the WHERE clause of a SQL statement in a CLOB data type.

MEMBER PROCEDURE GET_WHERE_CLAUSE(
   where_clause  IN/OUT  CLOB);

The following procedure returns the WHERE clause of a SQL statement with bind variables in a CLOB data type.

MEMBER PROCEDURE GET_WHERE_CLAUSE(
   where_clause     IN/OUT  CLOB,
   variable_list    IN/OUT  LCR$_ROW_LIST,
   bind_var_syntax  IN      VARCHAR2  DEFAULT ':');

Parameters

Table 247-24 GET_WHERE_CLAUSE Procedure Parameters

Parameter Description

where_clause

The WHERE clause of the SQL statement for the change that is encapsulated in the LCR

variable_list

The values for the bind variables in the order of the bind variables

bind_var_syntax

The syntax for the bind variables

One of the following values is valid:

  • Specify :, the default, for bind values to be in the form :1, :2, and so on.

  • Specify ? for bind values to be in the form ?.


GET_XML_INFORMATION Member Function

Gets the XML information for the specified column.

The return value can be one of the following:

DBMS_LCR.NOT_XML   CONSTANT NUMBER := 1;
DBMS_LCR.XML_DOC   CONSTANT NUMBER := 2;
DBMS_LCR.XML_DIFF  CONSTANT NUMBER := 3;

DBMS_LCR.NOT_XML indicates that the column is not an XMLType column. DBMS_LCR.XML_DOC indicates that the column contains an XML document. DBMS_LCR.XML_DIFF indicates that the column contains differences between old and new XML documents for an update operation.

Returns NULL if the specified column does not exist.

Syntax

MEMBER FUNCTION GET_XML_INFORMATION(
   column_name  IN  VARCHAR2)
RETURN NUMBER;

Parameter

Table 247-25 GET_XML_INFORMATION Function Parameter

Parameter Description

column_name

The column name


IS_STATEMENT_LCR Member Function

This function is reserved for internal use only.

Note:

This functionality is available starting with Oracle Database 11g Release 2 (11.2.0.2).

KEEP_COLUMNS Member Procedure

This procedure keeps a list of columns in a row LCR. The procedure deletes columns that are not in the list from the row LCR.

Syntax

MEMBER PROCEDURE KEEP_COLUMNS(
   column_list  IN  VARCHAR2,
   value_type   IN  VARCHAR2  DEFAULT '*');

Parameters

Table 247-26 KEEP_COLUMNS Procedure Parameters

Parameter Description

column_list

The names of the columns kept for the row LCR

Specify a comma-delimited list of type VARCHAR2. This procedure removes columns that are not in the list from the current row LCR.

value_type

The type of value for which to keep the columns

Specify old to keep the old values of the columns. An error is raised if the old values do not exist in the LCR.

Specify new to keep the new values of the columns. An error is raised if the new values do not exist in the LCR.

If * is specified, then the procedure keeps both the old and the new columns.


RENAME_COLUMN Member Procedure

Renames a column in a row LCR.

Syntax

MEMBER PROCEDURE RENAME_COLUMN(
   from_column_name  IN  VARCHAR2,
   to_column_name    IN  VARCHAR2,
   value_type        IN  VARCHAR2  DEFAULT '*');

Parameters

Table 247-27 RENAME_COLUMN Procedure Parameters

Parameter Description

from_column_name

The existing column name

to_column_name

The new column name

An error is raised if a column with the specified name already exists.

value_type

The type of value for which to rename the column

Specify old to rename the old value of the column. An error is raised if the old value does not exist in the LCR.

Specify new to rename the new value of the column. An error is raised if the new value does not exist in the LCR.

If * is specified, then the procedure renames the column names for both old and new value. The procedure raises an error if either column value does not exist in the LCR.


SET_LOB_INFORMATION Member Procedure

Sets LOB information for the column.

Note:

When you are processing a row LCR with a rule-based transformation, procedure DML handler, or error handler, you cannot use this member procedure.

Syntax

MEMBER PROCEDURE SET_LOB_INFORMATION(
  value_type       IN  VARCHAR2,
  column_name      IN  VARCHAR2,
  lob_information  IN  NUMBER);

Parameters

Table 247-28 SET_LOB_INFORMATION Procedure Parameters

Parameter Description

value_type

The type of value to set for the column, either old or new

Specify old only if lob_information is set to DBMS_LCR.NOT_A_LOB.

column_name

The name of the column.

An exception is raised if the column value does not exist. You might need to set this parameter for non-LOB columns.

lob_information

Specify one of the following values:

DBMS_LCR.NOT_A_LOB        CONSTANT NUMBER := 1;
  DBMS_LCR.NULL_LOB         CONSTANT NUMBER := 2;
  DBMS_LCR.INLINE_LOB       CONSTANT NUMBER := 3;
  DBMS_LCR.EMPTY_LOB        CONSTANT NUMBER := 4;
  DBMS_LCR.LOB_CHUNK        CONSTANT NUMBER := 5;
  DBMS_LCR.LAST_LOB_CHUNK   CONSTANT NUMBER := 6;

SET_LOB_OFFSET Member Procedure

Sets the LOB offset for the specified column in the number of characters for CLOB columns and the number of bytes for BLOB columns.

Note:

When you are processing a row LCR with a rule-based transformation, procedure DML handler, or error handler, you cannot use this member procedure.

Syntax

MEMBER PROCEDURE SET_LOB_OFFSET(
   value_type   IN  VARCHAR2,
   column_name  IN  VARCHAR2,
   lob_offset   IN  NUMBER);

Parameters

Table 247-29 SET_LOB_OFFSET Procedure Parameters

Parameter Description

value_type

The type of value to set for the column

Currently, only new can be specified.

column_name

The column name

An error is raised if the column value does not exist in the LCR.

lob_offset

The LOB offset number

Valid values are NULL or a positive integer less than or equal to DBMS_LOB.LOBMAXSIZE.


SET_LOB_OPERATION_SIZE Member Procedure

Sets the operation size for the LOB column in the number of characters for CLOB columns and bytes for BLOB columns.

Note:

When you are processing a row LCR with a rule-based transformation, procedure DML handler, or error handler, you cannot use this member procedure.

Syntax

MEMBER PROCEDURE SET_LOB_OPERATION_SIZE(
  value_type          IN  VARCHAR2,
  column_name         IN  VARCHAR2,
  lob_operation_size  IN  NUMBER);

Parameters

Table 247-30 SET_LOB_OPERATION_SIZE Procedure Parameters

Parameter Description

value_type

The type of value to set for the column

Currently, only new can be specified.

column_name

The name of the LOB column

An exception is raised if the column value does not exist in the LCR.

lob_operation_size

If lob_information for the LOB is or will be DBMS_LCR.LAST_LOB_CHUNK, then this parameter can be set to either a valid LOB ERASE value or a valid LOB TRIM value. A LOB ERASE value must be a positive integer less than or equal to DBMS_LOB.LOBMAXSIZE. A LOB TRIM value must be a nonnegative integer less than or equal to DBMS_LOB.LOBMAXSIZE.

Otherwise, set to NULL.


SET_ROW_TEXT Member Procedure

This procedure is reserved for internal use only.

Note:

This functionality is available starting with Oracle Database 11g Release 2 (11.2.0.2).

SET_VALUE Member Procedure

Overwrites the old or new value of the specified column.

One reason to overwrite an old value for a column is to resolve an error that resulted from a conflict.

Note:

To add a column to a row LCR, run ADD_COLUMN.

Considerations for LOB Columns

When processing a row LCR with LOB columns with a procedure DML handler or error handler, and the handler is using LOB assembly (the assemble_lobs parameter is set to TRUE for the handler), you can use this member procedure in the handler procedure on a LOB column in a row LCR. If assemble_lobs is set to FALSE for the handler, then you cannot use this member procedure on a LOB column.

To use a DML or error handler to set the value of a LOB column, specify the LOB locator for the column_value parameter in the member procedure. The SET_VALUE member procedure verifies that an ANYDATA encapsulated LOB locator is processed with a DML or error handler that is using LOB assembly. An error is raised under the following conditions:

If an error is raised because of one of these conditions, then the transaction that includes the row LCR is moved to the error queue, and the LOB is represented by the original (nonassembled) row LCRs.

Note:

  • Database compatibility must be 10.2.0 or higher to use LOB assembly.

  • When you are processing a row LCR with a rule-based transformation, you cannot use this member procedure on a LOB column.

  • When you are processing a row LCR with a rule-based transformation, procedure DML handler, or error handler, you cannot use this member procedure on a LONG or LONG RAW column.

Considerations for XMLType Columns

When processing a row LCR with XMLType columns with a procedure DML handler or error handler, any XMLType columns and LOB columns in the LCR are always assembled using LOB assembly. You can use this member procedure in the handler procedure on a row LCR that contains one or more XMLType columns.

To use a DML or error handler to set the value an XMLType column, specify the XMLType for the column_value parameter. The SET_VALUE member procedure verifies that an ANYDATA encapsulated XMLType is processed with a DML or error handler. An error is raised under the following conditions:

If an error is raised because of one of these conditions, then the transaction that includes the row LCR is moved to the error queue, and the XMLType column is represented by the original (nonassembled) row LCRs.

Note:

  • Database compatibility must be 11.1.0 or higher to process row LCRs with XMLType columns.

  • When you are processing a row LCR with a rule-based transformation, you cannot use this member procedure on XMLType columns.

Syntax

MEMBER PROCEDURE SET_VALUE(
   value_type    IN  VARCHAR2,
   column_name   IN  VARCHAR2,
   column_value  IN  ANYDATA);

Parameters

Table 247-31 SET_VALUE Procedure Parameters

Parameter Description

value_type

The type of value to set

Specify old to set the old value of the column. Specify new to set the new value of the column.

column_name

The column name

An error is raised if the specified column_value does not exist in the LCR for the specified column_type.

column_value

The new value of the column

If NULL is specified, then this procedure raises an error. To set the value to NULL, encapsulate the NULL in an ANYDATA instance.

If the member procedure is used in a procedure DML handler or error handler that uses LOB assembly, then specify a LOB locator for LOB columns.


SET_VALUES Member Procedure

Replaces all old values or all new values for the LCR, depending on the value type specified.

Considerations for LOB Columns

You can use this procedure when processing a row LCR with LOB columns with a procedure DML handler or error handler. If the handler is using LOB assembly (the assemble_lobs parameter is set to TRUE for the handler), then you can use this member procedure in the handler procedure. If assemble_lobs is set to FALSE for the handler, then you cannot use this member procedure on a row LCR.

To use a DML or error handler to set the value of one or more LOB columns in a row LCR, specify a LOB locator for each LOB column in the value_list parameter. The SET_VALUES member procedure verifies that an ANYDATA encapsulated LOB locator is processed with a DML or error handler that is using LOB assembly. An error is raised under the following conditions:

If an error is raised because of one of these conditions, then the transaction that includes the row LCR is moved to the error queue, and the LOB columns are represented by the original (nonassembled) row LCRs.

Note:

  • Database compatibility must be 10.2.0 or higher to use LOB assembly.

  • When you are processing a row LCR with a rule-based transformation, you cannot use this member procedure on LOB columns.

  • When you are processing a row LCR with a rule-based transformation, procedure DML handler, or error handler, you cannot use this member procedure on LONG or LONG RAW columns.

Considerations for XMLType Columns

When processing a row LCR with XMLType columns with a procedure DML handler or error handler, any XMLType and LOB columns in the LCR are always assembled using LOB assembly. You can use this member procedure in the handler procedure on a row LCR that contains one or more XMLType columns.

To use a DML or error handler to set the value of one or more XMLType columns in a row LCR, specify an XMLType for each XMLType column in the value_list parameter. The SET_VALUES member procedure verifies that an ANYDATA encapsulated XMLType is processed with a DML or error handler. An error is raised under the following conditions:

If an error is raised because of one of these conditions, then the transaction that includes the row LCR is moved to the error queue, and the XMLType columns are represented by the original (nonassembled) row LCRs.

Note:

  • Database compatibility must be 11.1.0 or higher to process row LCRs with XMLType columns.

  • When you are processing a row LCR with a rule-based transformation, you cannot use this member procedure on XMLType columns.

Syntax

MEMBER PROCEDURE SET_VALUES(
   value_type  IN  VARCHAR2,
   value_list  IN  SYS.LCR$_ROW_LIST);

Parameters

Table 247-32 SET_VALUES Procedure Parameters

Parameter Description

value_type

The type of values to replace

Specify old to replace the old values. Specify new to replace the new values.

value_list

List of values to replace the existing list

Use a NULL or an empty list to remove all values.

If the member procedure is used in a procedure DML handler or error handler that uses LOB assembly, then specify one or more LOB locators for LOB columns.


SET_XML_INFORMATION Member Procedure

Sets the XML information for the column.

Syntax

MEMBER PROCEDURE SET_XML_INFORMATION(
   column_name      IN  VARCHAR2,
   xml_information  IN  NUMBER);

Parameters

Table 247-33 SET_XML_INFORMATION Procedure Parameters

Parameter Description

column_name

The name of the column

An exception is raised if the column value does not exist in the LCR.

xml_information

Specify one of the following values:

DBMS_LCR.NOT_XML   CONSTANT NUMBER := 1;
  DBMS_LCR.XML_DOC   CONSTANT NUMBER := 2;
  DBMS_LCR.XML_DIFF  CONSTANT NUMBER := 3;

DBMS_LCR.NOT_XML indicates that the column is not an XMLType column. DBMS_LCR.XML_DOC indicates that the column contains an XML document. DBMS_LCR.XML_DIFF indicates that the column contains differences between old and new XML documents for an update operation.



Common Subprograms for LCR$_DDL_RECORD and LCR$_ROW_RECORD

The following functions and procedures are common to both the LCR$_DDL_RECORD and LCR$_ROW_RECORD type.

See Also:

For descriptions of the subprograms for these types that are exclusive to each type:

Table 247-34 Summary of Common Subprograms for DDL and Row LCR Types

Subprogram Description

GET_COMMAND_TYPE Member Function

Gets the command type of the logical change record (LCR)

GET_COMMIT_SCN Member Function

Gets the commit system change number (SCN) of the transaction to which the current LCR belongs

GET_COMMIT_SCN_FROM_POSITION Static Function

Gets the commit SCN of a transaction from the input position, which is generated by an XStream outbound server

GET_COMMIT_TIME

Gets the commit time of the transaction to which the current LCR belongs

GET_COMPATIBLE Member Function

Gets the minimal database compatibility required to support the LCR

GET_EXTRA_ATTRIBUTE Member Function

Gets the value for the specified extra attribute in the LCR

GET_OBJECT_NAME Member Function

Gets the name of the object that is changed by the LCR

GET_OBJECT_OWNER Member Function

Gets the owner of the object that is changed by the LCR

GET_POSITION Member Function

Gets the position of the current LCR

GET_SCN Member Function

Gets the SCN of the LCR

GET_SCN_FROM_POSITION Static Function

Gets the SCN from the input position, which is generated by an XStream outbound server

GET_SOURCE_DATABASE_NAME Member Function

Gets the source database name.

GET_SOURCE_TIME Member Function

Gets the time when the change in an LCR captured by a capture process was generated in the redo log of the source database, or the time when a persistent LCR was created

GET_TAG Member Function

Gets the tag for the LCR

GET_THREAD_NUMBER Member Function

Gets the thread number of the database instance that made the change that is encapsulated in the LCR

GET_TRANSACTION_ID Member Function

Gets the transaction identifier of the LCR

IS_NULL_TAG Member Function

Returns Y if the tag for the LCR is NULL, or returns N if the tag for the LCR is not NULL

SET_COMMAND_TYPE Member Procedure

Sets the command type in the LCR

SET_EXTRA_ATTRIBUTE Member Procedure

Sets the value for the specified extra attribute in the LCR

SET_OBJECT_NAME Member Procedure

Sets the name of the object that is changed by the LCR

SET_OBJECT_OWNER Member Procedure

Sets the owner of the object that is changed by the LCR

SET_SOURCE_DATABASE_NAME Member Procedure

Sets the source database name of the object that is changed by the LCR

SET_TAG Member Procedure

Sets the tag for the LCR


GET_COMMAND_TYPE Member Function

Gets the command type of the LCR.

See Also:

The "SQL Command Codes" table in the Oracle Call Interface Programmer's Guide for a complete list of command types

Syntax

MEMBER FUNCTION GET_COMMAND_TYPE() 
RETURN VARCHAR2;

GET_COMMIT_SCN Member Function

Gets the commit system change number (SCN) of the transaction to which the current LCR belongs.

The commit SCN for a transaction is available only during apply or during error transaction execution. This function can be used only in a procedure DML handler, DDL handler, or error handler.

The commit SCN might not be available for an LCR that is part of an incomplete transaction. For example, persistent LCRs might not have a commit SCN. If the commit SCN is not available for an LCR, then this function returns NULL.

Syntax

MEMBER FUNCTION GET_COMMIT_SCN() 
RETURN NUMBER;

GET_COMMIT_SCN_FROM_POSITION Static Function

Gets the commit system change number (SCN) of a transaction from the input position, which is generated by an XStream outbound server.

Syntax

STATIC FUNCTION GET_COMMIT_SCN_FROM_POSITION(
   position  IN  RAW) 
RETURN NUMBER;

Parameters

Table 247-35 GET_COMMIT_SCN_FROM_POSITION Function Parameter

Parameter Description

position

The position

You can obtain the position by using the GET_POSITION member function or by querying the DBA_XSTREAM_OUTBOUND_PROGRESS data dictionary view.


Note:

Using XStream requires purchasing a license for the Oracle GoldenGate product. See Oracle Database XStream Guide.

GET_COMMIT_TIME

Gets the commit time of the transaction to which the current LCR belongs.

The commit time for a transaction is available only during apply or during error transaction execution. This function can be used only in a procedure DML handler, DDL handler, or error handler.

The commit time might not be available for an LCR that is part of an incomplete transaction. For example, persistent LCRs might not have a commit time. If the commit time is not available for an LCR, then this function returns NULL.

Syntax

MEMBER FUNCTION GET_COMMIT_TIME() 
RETURN DATE;

GET_COMPATIBLE Member Function

Gets the minimal database compatibility required to support the LCR. You control the compatibility of an Oracle database using the COMPATIBLE initialization parameter.

The return value for this function can be one of the following:

Return Value COMPATIBLE Initialization Parameter Equivalent
DBMS_STREAMS.COMPATIBLE_9_2 9.2.0
DBMS_STREAMS.COMPATIBLE_10_1 10.1.0
DBMS_STREAMS.COMPATIBLE_10_2 10.2.0
DBMS_STREAMS.COMPATIBLE_11_1 11.1.0
DBMS_STREAMS.COMPATIBLE_11_2 11.2.0

DDL LCRs always return DBMS_STREAMS.COMPATIBLE_9_2.

You can use the following functions in the DBMS_STREAMS package for constant compatibility return values:

You can use these functions with the GET_COMPATIBLE member function for an LCR in rule conditions and apply handlers.

Note:

You can determine which database objects in a database are not supported by Oracle Streams by querying the DBA_STREAMS_UNSUPPORTED data dictionary view.

See Also:

Syntax

MEMBER FUNCTION GET_COMPATIBLE() 
RETURN NUMBER;

GET_EXTRA_ATTRIBUTE Member Function

Gets the value for the specified extra attribute in the LCR. The returned extra attribute is contained within an ANYDATA instance. You can use the INCLUDE_EXTRA_ATTRIBUTE procedure in the DBMS_CAPTURE_ADM package to instruct a capture process to capture one or more extra attributes.

Syntax

MEMBER FUNCTION GET_EXTRA_ATTRIBUTE(
   attribute_name  IN  VARCHAR2) 
RETURN ANYDATA;

Parameters

Table 247-36 GET_EXTRA_ATTRIBUTE Function Parameter

Parameter Description

attribute_name

The name of the extra attribute to return

Valid names are:

  • row_id

    The rowid of the row changed in a row LCR. This attribute is not included in DDL LCRs, nor in row LCRs for index-organized tables. The type is UROWID.

  • serial#

    The serial number of the session that performed the change captured in the LCR. The type is NUMBER.

  • session#

    The identifier of the session that performed the change captured in the LCR. The type is NUMBER.

  • thread#

    The thread number of the instance in which the change captured in the LCR was performed. Typically, the thread number is relevant only in an Oracle Real Application Clusters (Oracle RAC) environment. The type is NUMBER.

  • tx_name

    The name of the transaction that includes the LCR. The type is VARCHAR2.

  • username

    The name of the current user who performed the change captured in the LCR. The type is VARCHAR2.

An error is raised if the specified attribute_name is not valid.

If no value exists for the specified extra attribute, then the function returns a NULL.

See Also: Oracle Database PL/SQL Language Reference for more information about the current user


GET_OBJECT_NAME Member Function

Gets the name of the object that is changed by the LCR.

Syntax

MEMBER FUNCTION GET_OBJECT_NAME()
RETURN VARCHAR2;

GET_OBJECT_OWNER Member Function

Gets the owner of the object that is changed by the LCR.

Syntax

MEMBER FUNCTION GET_OBJECT_OWNER() 
RETURN VARCHAR2;

GET_POSITION Member Function

Gets the position of the current LCR. The position uniquely identifies each LCR. The position strictly increases within each transaction and across transactions.

LCR position is commonly used in XStream configurations.

Syntax

MEMBER FUNCTION GET_POSITION() 
RETURN RAW;

Note:

Using XStream requires purchasing a license for the Oracle GoldenGate product. See Oracle Database XStream Guide.

GET_SCN Member Function

Gets the system change number (SCN) of the LCR.

Syntax

MEMBER FUNCTION GET_SCN() 
RETURN NUMBER;

GET_SCN_FROM_POSITION Static Function

Gets the system change number (SCN) from the input position, which is generated by an XStream outbound server.

Syntax

STATIC FUNCTION GET_SCN_FROM_POSITION(
   position  IN  RAW) 
RETURN NUMBER;

Parameters

Table 247-37 GET_SCN_FROM_POSITION Function Parameter

Parameter Description

position

The position

You can obtain the position by using the GET_POSITION member function or by querying the DBA_XSTREAM_OUTBOUND_PROGRESS data dictionary view.


Note:

Using XStream requires purchasing a license for the Oracle GoldenGate product. See Oracle Database XStream Guide.

GET_SOURCE_DATABASE_NAME Member Function

Gets the global name of the source database. The source database is the database where the change occurred.

Syntax

MEMBER FUNCTION GET_SOURCE_DATABASE_NAME() 
RETURN VARCHAR2;

GET_SOURCE_TIME Member Function

Gets the time when the change in an LCR captured by a capture process was generated in the redo log of the source database, or the time when a persistent LCR was created.

Syntax

MEMBER FUNCTION GET_SOURCE_TIME() 
RETURN DATE;

GET_TAG Member Function

Gets the tag for the LCR. An LCR tag is a binary tag that enables tracking of the LCR. For example, this tag can be used to determine the original source database of the DML or DDL change when apply forwarding is used.

See Also:

Oracle Streams Replication Administrator's Guide for more information about tags

Syntax

MEMBER FUNCTION GET_TAG() 
RETURN RAW;

GET_THREAD_NUMBER Member Function

Gets the thread number of the database instance that made the change that is encapsulated in the LCR. Typically, the thread number is relevant in an Oracle Real Application Clusters configuration.

Syntax

MEMBER FUNCTION GET_THREAD_NUMBER()
RETURN NUMBER;

GET_TRANSACTION_ID Member Function

Gets the transaction identifier of the LCR.

Syntax

MEMBER FUNCTION GET_TRANSACTION_ID() 
RETURN VARCHAR2;

IS_NULL_TAG Member Function

Returns Y if the tag for the LCR is NULL, or returns N if the tag for the LCR is not NULL.

See Also:

Oracle Streams Replication Administrator's Guide for more information about tags

Syntax

MEMBER FUNCTION IS_NULL_TAG() 
RETURN VARCHAR2;

SET_COMMAND_TYPE Member Procedure

Sets the command type in the LCR. If the command type specified cannot be interpreted, then this procedure raises an error. For example, changing INSERT to GRANT would raise an error.

See Also:

Syntax

MEMBER PROCEDURE SET_COMMAND_TYPE(
   command_type  IN  VARCHAR2);

Parameter

Table 247-38 SET_COMMAND_TYPE Procedure Parameter

Parameter Description

command_type

The command type

Set this parameter to a non-NULL value.


SET_EXTRA_ATTRIBUTE Member Procedure

Sets the value for the specified extra attribute in the LCR. You can use the INCLUDE_EXTRA_ATTRIBUTE procedure in the DBMS_CAPTURE_ADM package to instruct a capture process to capture one or more extra attributes.

Syntax

MEMBER PROCEDURE SET_EXTRA_ATTRIBUTE(
   attribute_name   IN  VARCHAR2,
   attribute_value  IN  ANYDATA);

Parameters

Table 247-39 SET_EXTRA_ATTRIBUTE Procedure Parameter

Parameter Description

attribute_name

The name of the extra attribute to set

Valid names are:

  • row_id

    The rowid of the row changed in a row LCR. This attribute is not included in DDL LCRs, nor in row LCRs for index-organized tables. The type is VARCHAR2.

  • serial#

    The serial number of the session that performed the change captured in the LCR. The type is NUMBER.

  • session#

    The identifier of the session that performed the change captured in the LCR. The type is NUMBER.

  • thread#

    The thread number of the instance in which the change captured in the LCR was performed. Typically, the thread number is relevant only in an Oracle Real Application Clusters (Oracle RAC) environment. The type is NUMBER.

  • tx_name

    The name of the transaction that includes the LCR. The type is VARCHAR2.

  • username

    The name of the current user who performed the change captured in the LCR. The type is VARCHAR2.

An error is raised if the specified attribute_name is not valid.

See Also: Oracle Database PL/SQL Language Reference for more information about the current user

attribute_value

The value to which the specified extra attribute is set

If set to NULL, then this procedure removes the specified extra attribute from the LCR. To set to NULL, encapsulate the NULL in an ANYDATA instance.


SET_OBJECT_NAME Member Procedure

Sets the name of the object that is changed by the LCR.

Syntax

MEMBER PROCEDURE SET_OBJECT_NAME(
   object_name  IN  VARCHAR2);

Parameter

Table 247-40 SET_OBJECT_NAME Procedure Parameter

Parameter Description

object_name

The name of the object


SET_OBJECT_OWNER Member Procedure

Sets the owner of the object that is changed by the LCR.

Syntax

MEMBER PROCEDURE SET_OBJECT_OWNER(
   object_owner  IN  VARCHAR2);

Parameter

Table 247-41 SET_OBJECT_OWNER Procedure Parameter

Parameter Description

object_owner

The schema that contains the object


SET_SOURCE_DATABASE_NAME Member Procedure

Sets the source database name of the object that is changed by the LCR.

Syntax

MEMBER PROCEDURE SET_SOURCE_DATABASE_NAME(
   source_database_name  IN  VARCHAR2);

Parameter

Table 247-42 SET_SOURCE_DATABASE_NAME Procedure Parameter

Parameter Description

source_database_name

The source database of the change

If you do not include the domain name, then the procedure appends the local domain to the database name automatically. For example, if you specify DBS1 and the local domain is EXAMPLE.COM, then the procedure specifies DBS1.EXAMPLE.COM automatically. Set this parameter to a non-NULL value.


SET_TAG Member Procedure

Sets the tag for the LCR. An LCR tag is a binary tag that enables tracking of the LCR. For example, this tag can be used to determine the original source database of the change when apply forwarding is used.

See Also:

Oracle Streams Replication Administrator's Guide for more information about tags

Syntax

MEMBER PROCEDURE SET_TAG(
   tag  IN  RAW);

Parameter

Table 247-43 SET_TAG Procedure Parameter

Parameter Description

tag

The binary tag for the LCR

The size limit for a tag value is two kilobytes.



LCR$_ROW_LIST Type

Identifies a list of column values for a row in a table.

This type uses the LCR$_ROW_UNIT type and is used in the LCR$_ROW_RECORD type.

Syntax

CREATE TYPE SYS.LCR$_ROW_LIST AS TABLE OF SYS.LCR$_ROW_UNIT
/

LCR$_ROW_UNIT Type

Identifies the value for a column in a row.

This type is used in the LCR$_ROW_LIST type.

Syntax

CREATE TYPE LCR$_ROW_UNIT AS OBJECT (
  column_name         VARCHAR2(4000),
  data                ANYDATA,
  lob_information     NUMBER,
  lob_offset          NUMBER,
  lob_operation_size  NUMBER
  long_information    NUMBER);
/

Attributes

Table 247-44 LCR$_ROW_UNIT Attributes

Attribute Description

column_name

The name of the column

data

The data contained in the column

lob_information

Contains the LOB information for the column and contains one of the following values:

DBMS_LCR.NOT_A_LOB        CONSTANT NUMBER := 1;
  DBMS_LCR.NULL_LOB         CONSTANT NUMBER := 2;
  DBMS_LCR.INLINE_LOB       CONSTANT NUMBER := 3;
  DBMS_LCR.EMPTY_LOB        CONSTANT NUMBER := 4;
  DBMS_LCR.LOB_CHUNK        CONSTANT NUMBER := 5;
  DBMS_LCR.LAST_LOB_CHUNK   CONSTANT NUMBER := 6;

lob_offset

The LOB offset specified in the number of characters for CLOB columns and the number of bytes for BLOB columns

Valid values are NULL or a positive integer less than or equal to DBMS_LOB.LOBMAXSIZE.

lob_operation_size

If lob_information for the LOB is DBMS_LCR.LAST_LOB_CHUNK, then this parameter can be set to either a valid LOB ERASE value or a valid LOB TRIM value. A LOB ERASE value must be a positive integer less than or equal to DBMS_LOB.LOBMAXSIZE. A LOB TRIM value must be a nonnegative integer less than or equal to DBMS_LOB.LOBMAXSIZE.

If lob_information is not DBMS_LCR.LAST_LOB_CHUNK and for all other operations, is NULL.

long_information

Contains the LONG information for the column and contains one of the following values:

DBMS_LCR.not_a_long CONSTANT NUMBER := 1;

DBMS_LCR.null_long CONSTANT NUMBER := 2;

DBMS_LCR.inline_long CONSTANT NUMBER := 3;

DBMS_LCR.long_chunk CONSTANT NUMBER := 4;

DBMS_LCR.last_long_chunk CONSTANT NUMBER := 5;