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fix(flink): #455 fix json functions' params problem in flink #459

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fix(flink): #455 fix json functions' params problem in flink #459

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39 changes: 39 additions & 0 deletions src/grammar/flink/FlinkSqlParser.g4
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Original file line number Diff line number Diff line change
Expand Up @@ -738,6 +738,15 @@ predicate
| KW_IS KW_JSON (KW_VALUE | KW_ARRAY | identifier)?
;

jsonFunctionBranch
: KW_NULL
| KW_EMPTY KW_ARRAY
| KW_EMPTY uid
| KW_TRUE
| KW_FALSE
| KW_UNKNOWN
;

likePredicate
: KW_NOT? kind=KW_LIKE quantifier=(KW_ANY | KW_ALL) (
LR_BRACKET RR_BRACKET
Expand Down Expand Up @@ -825,6 +834,36 @@ functionParam
| timeIntervalUnit
| timePointUnit
| expression
| jsonValueParams
| jsonQueryParams
| jsonObjectParams
| jsonArrayParams
;

jsonValueParams
: columnNamePath (uid columnType)? (
(uid | KW_NULL | KW_DEFAULT valueExpression) KW_ON KW_EMPTY
)? ((uid | KW_NULL | KW_DEFAULT valueExpression) KW_ON uid)?
;

jsonQueryParams
: columnNamePath ((KW_WITHOUT | KW_WITH uid?) KW_ARRAY? uid)? (
jsonFunctionBranch KW_ON KW_EMPTY
)? (jsonFunctionBranch KW_ON uid)?
;

// JSON 函数只能在 JSON_OBJECT 函数中使用
jsonObjectParams
: (
KW_KEY? columnNamePath KW_VALUE? (
valueExpression
| KW_JSON LR_BRACKET (valueExpression)* RR_BRACKET
)
)* ((KW_NULL | uid) KW_ON KW_NULL)?
;

jsonArrayParams
: valueExpression* ((KW_NULL | uid) KW_ON KW_NULL)?
;

dereferenceDefinition
Expand Down
7 changes: 6 additions & 1 deletion src/lib/flink/FlinkSqlParser.interp
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