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| author | Andrew Dunstan <andrew@dunslane.net> | 2022-03-03 13:02:53 -0500 |
|---|---|---|
| committer | Andrew Dunstan <andrew@dunslane.net> | 2022-03-28 15:37:08 -0400 |
| commit | 33a377608fc29cdd1f6b63be561eab0aee5c81f0 (patch) | |
| tree | 47abccafdaeae1c4466c917bbd85912f39558360 /src/include/executor | |
| parent | 6198420ad8a72e37f4fe4964616b17e0fd33b808 (diff) | |
| download | postgresql-33a377608fc29cdd1f6b63be561eab0aee5c81f0.tar.gz postgresql-33a377608fc29cdd1f6b63be561eab0aee5c81f0.zip | |
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/executor')
| -rw-r--r-- | src/include/executor/execExpr.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/include/executor/execExpr.h b/src/include/executor/execExpr.h index c830fcf7262..a41722ae1e4 100644 --- a/src/include/executor/execExpr.h +++ b/src/include/executor/execExpr.h @@ -240,6 +240,7 @@ typedef enum ExprEvalOp EEOP_WINDOW_FUNC, EEOP_SUBPLAN, EEOP_JSON_CONSTRUCTOR, + EEOP_IS_JSON, /* aggregation related nodes */ EEOP_AGG_STRICT_DESERIALIZE, @@ -680,6 +681,12 @@ typedef struct ExprEvalStep int nargs; } json_constructor; + /* for EEOP_IS_JSON */ + struct + { + JsonIsPredicate *pred; /* original expression node */ + } is_json; + } d; } ExprEvalStep; @@ -774,6 +781,7 @@ extern void ExecEvalHashedScalarArrayOp(ExprState *state, ExprEvalStep *op, extern void ExecEvalConstraintNotNull(ExprState *state, ExprEvalStep *op); extern void ExecEvalConstraintCheck(ExprState *state, ExprEvalStep *op); extern void ExecEvalXmlExpr(ExprState *state, ExprEvalStep *op); +extern void ExecEvalJsonIsPredicate(ExprState *state, ExprEvalStep *op); extern void ExecEvalGroupingFunc(ExprState *state, ExprEvalStep *op); extern void ExecEvalSubPlan(ExprState *state, ExprEvalStep *op, ExprContext *econtext); |