From 865fe4d5df560a6f5353da652018ff876978ad2d Mon Sep 17 00:00:00 2001 From: Andrew Dunstan Date: Thu, 3 Mar 2022 13:00:49 -0500 Subject: Common SQL/JSON clauses This introduces some of the building blocks used by the SQL/JSON constructor and query functions. Specifically, it provides node executor and grammar support for the FORMAT JSON [ENCODING foo] clause, and values decorated with it, and for the RETURNING clause. The following SQL/JSON patches will leverage these. Nikita Glukhov (who probably deserves an award for perseverance). Reviewers have included (in no particular order) Andres Freund, Alexander Korotkov, Pavel Stehule, Andrew Alsup. Erik Rijkers, Zihong Yu and Himanshu Upadhyaya. Discussion: https://postgr.es/m/cd0bb935-0158-78a7-08b5-904886deac4b@postgrespro.ru --- src/backend/optimizer/util/clauses.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'src/backend/optimizer/util') diff --git a/src/backend/optimizer/util/clauses.c b/src/backend/optimizer/util/clauses.c index 413dcac0363..b9cefe88479 100644 --- a/src/backend/optimizer/util/clauses.c +++ b/src/backend/optimizer/util/clauses.c @@ -3512,6 +3512,29 @@ eval_const_expressions_mutator(Node *node, return ece_evaluate_expr((Node *) newcre); return (Node *) newcre; } + case T_JsonValueExpr: + { + JsonValueExpr *jve = (JsonValueExpr *) node; + Node *raw = eval_const_expressions_mutator((Node *) jve->raw_expr, + context); + + if (raw && IsA(raw, Const)) + { + Node *formatted; + Node *save_case_val = context->case_val; + + context->case_val = raw; + + formatted = eval_const_expressions_mutator((Node *) jve->formatted_expr, + context); + + context->case_val = save_case_val; + + if (formatted && IsA(formatted, Const)) + return formatted; + } + break; + } default: break; } -- cgit v1.2.3