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| author | Andrew Dunstan | 2022-03-03 18:02:53 +0000 |
|---|---|---|
| committer | Andrew Dunstan | 2022-03-28 19:37:08 +0000 |
| commit | 33a377608fc29cdd1f6b63be561eab0aee5c81f0 (patch) | |
| tree | 47abccafdaeae1c4466c917bbd85912f39558360 /src/include/utils/jsonfuncs.h | |
| parent | 6198420ad8a72e37f4fe4964616b17e0fd33b808 (diff) | |
IS JSON predicate
This patch intrdocuces 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 an IS and IS NOT variant. The tests are:
IS JSON [VALUE]
IS JSON ARRAY
IS JSON OBJECT
IS JSON SCALAR
IS JSON WITH | WITHOUT UNIQUE KEYS
These are mostly self-explanatory, but note that IS JSON WITHOUT UNIQUE
KEYS is true whenever IS JSON is true, and IS JSON WITH UNIQUE KEYS is
true whenever IS JSON is true except it IS JSON OBJECT is true and there
are duplicate keys (which is never the case when applied to jsonb values).
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/include/utils/jsonfuncs.h')
| -rw-r--r-- | src/include/utils/jsonfuncs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/include/utils/jsonfuncs.h b/src/include/utils/jsonfuncs.h index 865b2ff7c11..cd16b6c0c84 100644 --- a/src/include/utils/jsonfuncs.h +++ b/src/include/utils/jsonfuncs.h @@ -45,6 +45,9 @@ extern void pg_parse_json_or_ereport(JsonLexContext *lex, JsonSemAction *sem); /* report an error during json lexing or parsing */ extern void json_ereport_error(JsonParseErrorType error, JsonLexContext *lex); +/* get first JSON token */ +extern JsonTokenType json_get_first_token(text *json, bool throw_error); + extern uint32 parse_jsonb_index_flags(Jsonb *jb); extern void iterate_jsonb_values(Jsonb *jb, uint32 flags, void *state, JsonIterateStringValuesAction action); |