0002718: Update the documentation for sym_trigger.use_capture_old_data

symmetric-core/src/main/resources/symmetric-schema.xml

@@ -776,7 +776,7 @@
         <column name="sync_key_names" type="LONGVARCHAR"  description="Specify a comma-delimited list of columns that should be used as the key for synchronization operations.  By default, if not specified, then the primary key of the table will be used." />
         <column name="use_stream_lobs" type="BOOLEANINT" size="1" required="true" default="0"  description="Specifies whether to capture lob data as the trigger is firing or to stream lob columns from the source tables using callbacks during extraction. A value of 1 indicates to stream from the source via callback; a value of 0, lob data is captured by the trigger." />
         <column name="use_capture_lobs" type="BOOLEANINT" size="1" required="true" default="0" description="Provides a hint as to whether this trigger will capture big lobs data.  If set to 1 every effort will be made during data capture in trigger and during data selection for initial load to use lob facilities to extract and store data in the database.  On Oracle, this may need to be set to 1 to get around 4k concatenation errors during data capture and during initial load."/>
-        <column name="use_capture_old_data" type="BOOLEANINT" size="1" required="true" default="1" description="Indicates whether this trigger should capture and send the old data (previous state of the row before the change)."/>
+        <column name="use_capture_old_data" type="BOOLEANINT" size="1" required="true" default="1" description="Set this to 1 to capture old data.  Old data is used for conflict resolution and it also is used to calculate which columns have changed.  The software will only update changed columns when old data is captured."/>
         <column name="use_handle_key_updates" type="BOOLEANINT" size="1" required="true" default="0" description="Allows handling of primary key updates (SQLServer dialect only)"/>
         <column name="create_time" type="TIMESTAMP" required="true"  description="Timestamp when this entry was created." />
         <column name="last_update_by" type="VARCHAR" size="50"  description="The user who last updated this entry." />