plsql - Oracle: Deferring a constraint in a begin/end block? -

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how defer constraint inside begin/end block?

this works:

sql> set constraint t_pk deferred;                                               constraint set.

but identical statement fails in begin/end block:

sql> begin 2  set constraint t_pk deferred; 3  end; 4  / set constraint t_pk deferred;     * error @ line 2: ora-06550: line 2, column 5: pl/sql: ora-00922: missing or invalid option ora-06550: line 2, column 1: pl/sql: sql statement ignored

you need use execute immediate:

begin execute immediate 'set constraint t_pk deferred'; end;

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