8.1 Mapping XDS Events for Indirect Synchronization

The following table summarizes how the Subscriber channel maps XDS events to DML SQL statements for indirect synchronization:

Table 8-1 Mapping XDS Events for Indirect Synchronization

XML Event

SQL Equivalent

<add>

  • 0 or more select statements, depending upon the matching policy.

  • 1 parent table insert statement for all single value <add-attr> elements.

  • 0 or 1 stored procedure/function calls to retrieve primary key values before or after the parent table insert statement.

  • 1 child table insert statement for each multivalue <add-attr> element. 

<modify>

  • 1 parent table update statement for each single value <add-value> or <remove-value> element.

  • 1 child table insert statement for each multivalue <add-value> element.

  • 1 child table delete statement for each <remove-value> element.

<delete>

  • 1 parent table delete statement.

  • 1 delete statement for each child table.

<query>

  • 1 parent table select statement.

  • 1 select statement for each childtable.

<move> <rename> <modify-password> <check-object-password>

  • 0 statements unless bound to embedded SQL statements.