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| author | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2023-03-31 22:34:04 +0200 |
|---|---|---|
| committer | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2023-03-31 22:34:04 +0200 |
| commit | 6ee30209a6f161d0a267a33f090c70c579c87c00 (patch) | |
| tree | eda2b3a9f0a61f3fc484819b39abf1eb130e0d88 /src/backend/utils/adt/ruleutils.c | |
| parent | a2a0c7c29e47f39da905577659e66b0086b769cc (diff) | |
| download | postgresql-6ee30209a6f161d0a267a33f090c70c579c87c00.tar.gz postgresql-6ee30209a6f161d0a267a33f090c70c579c87c00.zip | |
SQL/JSON: support the IS JSON predicate
This patch introduces the SQL standard IS JSON predicate. It operates
on text and bytea values representing JSON, as well as on the json and
jsonb types. Each test has IS and IS NOT variants and supports a WITH
UNIQUE KEYS flag. The tests are:
IS JSON [VALUE]
IS JSON ARRAY
IS JSON OBJECT
IS JSON SCALAR
These should be self-explanatory.
The WITH UNIQUE KEYS flag makes these return false when duplicate keys
exist in any object within the value, not necessarily directly contained
in the outermost object.
Author: Nikita Glukhov <n.gluhov@postgrespro.ru>
Author: Teodor Sigaev <teodor@sigaev.ru>
Author: Oleg Bartunov <obartunov@gmail.com>
Author: Alexander Korotkov <aekorotkov@gmail.com>
Author: Amit Langote <amitlangote09@gmail.com>
Author: Andrew Dunstan <andrew@dunslane.net>
Reviewers have included (in no particular order) Andres Freund, Alexander
Korotkov, Pavel Stehule, Andrew Alsup, Erik Rijkers, Zihong Yu,
Himanshu Upadhyaya, Daniel Gustafsson, Justin Pryzby.
Discussion: https://postgr.es/m/CAF4Au4w2x-5LTnN_bxky-mq4=WOqsGsxSpENCzHRAzSnEd8+WQ@mail.gmail.com
Discussion: https://postgr.es/m/cd0bb935-0158-78a7-08b5-904886deac4b@postgrespro.ru
Discussion: https://postgr.es/m/20220616233130.rparivafipt6doj3@alap3.anarazel.de
Discussion: https://postgr.es/m/abd9b83b-aa66-f230-3d6d-734817f0995d%40postgresql.org
Diffstat (limited to 'src/backend/utils/adt/ruleutils.c')
| -rw-r--r-- | src/backend/utils/adt/ruleutils.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c index 1c078d700d4..461735e84f0 100644 --- a/src/backend/utils/adt/ruleutils.c +++ b/src/backend/utils/adt/ruleutils.c @@ -8227,6 +8227,7 @@ isSimpleNode(Node *node, Node *parentNode, int prettyFlags) case T_NullTest: case T_BooleanTest: case T_DistinctExpr: + case T_JsonIsPredicate: switch (nodeTag(parentNode)) { case T_FuncExpr: @@ -9530,6 +9531,42 @@ get_rule_expr(Node *node, deparse_context *context, get_json_constructor((JsonConstructorExpr *) node, context, false); break; + case T_JsonIsPredicate: + { + JsonIsPredicate *pred = (JsonIsPredicate *) node; + + if (!PRETTY_PAREN(context)) + appendStringInfoChar(context->buf, '('); + + get_rule_expr_paren(pred->expr, context, true, node); + + appendStringInfoString(context->buf, " IS JSON"); + + /* TODO: handle FORMAT clause */ + + switch (pred->item_type) + { + case JS_TYPE_SCALAR: + appendStringInfoString(context->buf, " SCALAR"); + break; + case JS_TYPE_ARRAY: + appendStringInfoString(context->buf, " ARRAY"); + break; + case JS_TYPE_OBJECT: + appendStringInfoString(context->buf, " OBJECT"); + break; + default: + break; + } + + if (pred->unique_keys) + appendStringInfoString(context->buf, " WITH UNIQUE KEYS"); + + if (!PRETTY_PAREN(context)) + appendStringInfoChar(context->buf, ')'); + } + break; + case T_List: { char *sep; |