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PostgreSQL documentation

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files. When <literal>off</> (the default), a statement in a

transaction block that generates an error aborts the entire

transaction. The on_error_rollback-on mode works by issuing an

implicit <command>SAVEPONT</> for you, just before each command

implicit <command>SAVEPOINT</> for you, just before each command

that is in a transaction block, and rolls back to the savepoint

on error.

</para>