oushu/lava-oushudb-dt-sql-parser
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feat(flink): add grammar rules that pass the test

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This commit is contained in:
Erindcl
2020-11-20 17:08:17 +08:00
parent da9660c6fe
commit afef8e6d72
1 changed files with 48 additions and 10 deletions
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58
src/grammar/flinksql/FlinkSqlParser.g4
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@ -157,19 +157,27 @@ valuesRowDefinition
// Select statements
queryStatement
:
: (
selectClause | selectStatement
) orderByCaluse? limitClause
;
selectStatement
: SELECT setQuantifier?
(ASTERISK_SIGN | projectItemDefinition (COMMA projectItemDefinition)*)
FROM tableExpression
: selectClause fromClause whereClause? groupByClause? havingClause?
;
selectClause
: SELECT setQuantifier? (ASTERISK_SIGN | projectItemDefinition (COMMA projectItemDefinition)*)
;
projectItemDefinition
: expression (AS? uid)? | uid '.' '*'
;
fromClause
: FROM tableExpression
;
tableExpression
: tableReference (COMMA tableReference)*
;
@ -182,6 +190,39 @@ tablePrimary
: TABLE? uid
;
whereClause
: WHERE booleanExpression
;
groupByClause
: GROUP BY groupItemDefinition (COMMA groupItemDefinition)*
;
groupItemDefinition
: expression
| LR_BRACKET RR_BRACKET
| LR_BRACKET expression (COMMA expression)* RR_BRACKET
| CUBE LR_BRACKET expression (COMMA expression)* RR_BRACKET
| ROLLUP LR_BRACKET expression (COMMA expression)* RR_BRACKET
| GROUPING SETS LR_BRACKET groupItemDefinition (COMMA groupItemDefinition)* RR_BRACKET
;
havingClause
: HAVING booleanExpression
;
orderByCaluse
: ORDER BY orderItemDefition (COMMA orderItemDefition)*
;
orderItemDefition
: expression (ASC | DESC)
;
limitClause
: LIMIT (ALL | limit=expression)
;
// expression
expression
@ -227,7 +268,7 @@ primaryExpression
| FIRST '(' expression (IGNORE NULLS)? ')' #first
| LAST '(' expression (IGNORE NULLS)? ')' #last
| POSITION '(' substr=valueExpression IN str=valueExpression ')' #position
| constant #constantDefault
// | constant #constantDefault
| ASTERISK #star
// | qualifiedName '.' ASTERISK #star
// | '(' namedExpression (',' namedExpression)+ ')' #rowConstructor
@ -236,8 +277,8 @@ primaryExpression
// (FILTER '(' WHERE where=booleanExpression ')')? (OVER windowSpec)? #functionCall
// | identifier '->' expression #lambda
// | '(' identifier (',' identifier)+ ')' '->' expression #lambda
| value=primaryExpression LS_BRACKET index=valueExpression RS_BRACKET #subscript
// | identifier #columnReference
// | value=primaryExpression LS_BRACKET index=valueExpression RS_BRACKET #subscript
| identifier #columnReference
// | base=primaryExpression '.' fieldName=identifier #dereference
| '(' expression ')' #parenthesizedExpression
// | EXTRACT '(' field=identifier FROM source=valueExpression ')' #extract
@ -685,9 +726,6 @@ RR_BRACKET: ')';
COMMA: ',';
SEMICOLON: ';';
AT_SIGN: '@';
ZERO_DECIMAL: '0';
ONE_DECIMAL: '1';
TWO_DECIMAL: '2';
SINGLE_QUOTE_SYMB: '\'';
DOUBLE_QUOTE_SYMB: '"';
REVERSE_QUOTE_SYMB: '`';