goldengate 参数之GETTRUNCATES | IGNORETRUNCATES --转载

GETTRUNCATES | IGNORETRUNCATES
Valid For
Extract and Replicat
Description
Use the GETTRUNCATESand IGNORETRUNCATES parameters to control whether or not 
Oracle GoldenGate processes table truncate operations. By default, truncate operations 
are not captured from the source or replicated to the target.
GETTRUNCATES and IGNORETRUNCATES are table-specific. One parameter remains in 
effect for all subsequent TABLE or MAP statements, until the other parameter is 
encountered.
In a coordinated Replicat configuration, truncates are always processed by the thread 
that is responsible for barrier transactions.
默认的在仅仅开启DML复制的情况下TRUNCATE是不被捕获的，如果需要捕获请时候参数，EXTRACT端和REPLICAT端
都需要开启

3 Supported Databases
■ GETTRUNCATESand IGNORETRUNCATESare not supported for Teradata.
■ GETTRUNCATESand IGNORETRUNCATESare supported by Extract for Oracle and 
Sybase.
■ GETTRUNCATESand IGNORETRUNCATESare supported by Replicat for Oracle, SQL 
Server, Sybase, DB2 LUW, DB2 z/OS, MySQL, SQL/MX, and other ODBC targets 
that support the TRUNCATEcommand.
本组参数仅仅支持ORACLE和SYBASE

3 Oracle Limitations
■ Oracle GoldenGate supports the Oracle TRUNCATE TABLE command, but not 
TRUNCATE PARTITION. You can replicate TRUNCATE PARTITIONas part of the full 
Oracle GoldenGate DDL replication support.
■ The database does not log truncates against an empty table, so those operations 
are not captured by Oracle GoldenGate. The DDL support of Oracle GoldenGate 
can be used for this purpose.
■ The database does not log truncates for empty partitions, so Oracle GoldenGate 
cannot reliably process TRUNCATE TABLE when the table contains any empty 
partitions. Do not use GETTRUNCATES on any partitioned table. Oracle GoldenGate 
DDL support can be used to capture truncates on tables that might include empty 
partitions.

本组参数仅仅支持在未开启DDL复制的情况下需要TRUNCATE TABLE的情况，但是不支持TRUNCATE paration，
如果需要TRUNCATE PARATITION请开启DDL复制
如果TUNCATE一个空表，在只支持DML的情况下是不捕获的，如果需要捕获请开启DDL复制