Function is_opclause

src/include/nodes/nodeFuncs.h:65–69

Is clause an OpExpr clause? */

/* Is clause an OpExpr clause? */
static inline bool
is_opclause(const void *clause)
{
	return clause != NULL && IsA(clause, OpExpr);
}

/* Extract left arg of a binary opclause, or only arg of a unary opclause */
static inline Node *