Function ExecPrepareCheck

src/backend/executor/execExpr.c:808–823

* ExecPrepareCheck -- initialize check constraint for execution outside a * normal Plan tree context. * * See ExecPrepareExpr() and ExecInitCheck() for details. */

 * See ExecPrepareExpr() and ExecInitCheck() for details.
 */
ExprState *
ExecPrepareCheck(List *qual, EState *estate)
{
	ExprState  *result;
	MemoryContext oldcontext;

	oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);

	qual = (List *) expression_planner((Expr *) qual);

	result = ExecInitCheck(qual, NULL);

	MemoryContextSwitchTo(oldcontext);

	return result;
}

/*
 * Call ExecPrepareExpr() on each member of a list of Exprs, and return