Valid For

Extract

Description

Use the EXTRACT parameter to specify an Extract group for online (continuous) change synchronization. This parameter links the current run with previous runs, so that data continuity is maintained between source and target tables. Unless stopped by a user, Extract runs continuously and maintains checkpoints in the data source and trail to ensure data integrity and fault tolerance throughout planned or unplanned process termination, system outages, or network failure. EXTRACT must be the first entry in the parameter file.

For more information about implementing change synchronization, see the Administering Oracle GoldenGate.

Default

None

Syntax

EXTRACT group_name
[NLS_LENTH_SEMANTICS BYTE | CHAR ]

group_name

The group name as defined with the ADD EXTRACT command.

NLS_LENGTH_SEMANTICS [BYTE | CHAR]

Use this option to switch index values between bytes and characters. The default is bytes.

Example

The following specifies an Extract group named finance.

EXTRACT finance