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| author | Andrew Dunstan <andrew@dunslane.net> | 2022-03-03 13:02:10 -0500 |
|---|---|---|
| committer | Andrew Dunstan <andrew@dunslane.net> | 2022-03-27 17:03:34 -0400 |
| commit | f4fb45d15c59d7add2e1b81a9d477d0119a9691a (patch) | |
| tree | 9025afb61fd4409ae48cd21d47c7fd58647e2633 /src/backend/optimizer/util | |
| parent | f79b803dcc98d707450e158db3638dc67ff8380b (diff) | |
SQL/JSON constructors
This patch introduces the SQL/JSON standard constructors for JSON:
JSON()
JSON_ARRAY()
JSON_ARRAYAGG()
JSON_OBJECT()
JSON_OBJECTAGG()
For the most part these functions provide facilities that mimic
existing json/jsonb functions. However, they also offer some useful
additional functionality. In addition to text input, the JSON() function
accepts bytea input, which it will decode and constuct a json value from.
The other functions provide useful options for handling duplicate keys
and null values.
This series of patches will be followed by a consolidated documentation
patch.
Nikita Glukhov
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/cd0bb935-0158-78a7-08b5-904886deac4b@postgrespro.ru
Diffstat (limited to 'src/backend/optimizer/util')
| -rw-r--r-- | src/backend/optimizer/util/clauses.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/backend/optimizer/util/clauses.c b/src/backend/optimizer/util/clauses.c index b9cefe88479..e1147c431e6 100644 --- a/src/backend/optimizer/util/clauses.c +++ b/src/backend/optimizer/util/clauses.c @@ -50,6 +50,8 @@ #include "utils/builtins.h" #include "utils/datum.h" #include "utils/fmgroids.h" +#include "utils/json.h" +#include "utils/jsonb.h" #include "utils/lsyscache.h" #include "utils/memutils.h" #include "utils/syscache.h" @@ -382,6 +384,27 @@ contain_mutable_functions_walker(Node *node, void *context) context)) return true; + if (IsA(node, JsonConstructorExpr)) + { + const JsonConstructorExpr *ctor = (JsonConstructorExpr *) node; + ListCell *lc; + bool is_jsonb = + ctor->returning->format->format_type == JS_FORMAT_JSONB; + + /* Check argument_type => json[b] conversions */ + foreach(lc, ctor->args) + { + Oid typid = exprType(lfirst(lc)); + + if (is_jsonb ? + !to_jsonb_is_immutable(typid) : + !to_json_is_immutable(typid)) + return true; + } + + /* Check all subnodes */ + } + if (IsA(node, SQLValueFunction)) { /* all variants of SQLValueFunction are stable */ |