Function transformExpr

src/backend/parser/parse_expr.c:97–113

* transformExpr - * Analyze and transform expressions. Type checking and type casting is * done here. This processing converts the raw grammar output into * expression trees with fully determined semantics. */

 *	  expression trees with fully determined semantics.
 */
Node *
transformExpr(ParseState *pstate, Node *expr, ParseExprKind exprKind)
{
	Node	   *result;
	ParseExprKind sv_expr_kind;

	/* Save and restore identity of expression type we're parsing */
	Assert(exprKind != EXPR_KIND_NONE);
	sv_expr_kind = pstate->p_expr_kind;
	pstate->p_expr_kind = exprKind;

	result = transformExprRecurse(pstate, expr);

	pstate->p_expr_kind = sv_expr_kind;

	return result;
}

static Node *
transformExprRecurse(ParseState *pstate, Node *expr)