oushu/lava-oushudb-dt-sql-parser
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

feat(flink): add grammar rules that pass the test

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
src/grammar/flinksql/FlinkSqlParser.g4
View File

@ -157,19 +157,27 @@ valuesRowDefinition
// Select statements // Select statements
queryStatement queryStatement
: : (
selectClause | selectStatement
) orderByCaluse? limitClause
; ;
selectStatement selectStatement
: SELECT setQuantifier? : selectClause fromClause whereClause? groupByClause? havingClause?
(ASTERISK_SIGN | projectItemDefinition (COMMA projectItemDefinition)*) ;
FROM tableExpression
selectClause
: SELECT setQuantifier? (ASTERISK_SIGN | projectItemDefinition (COMMA projectItemDefinition)*)
; ;
projectItemDefinition projectItemDefinition
: expression (AS? uid)? | uid '.' '*' : expression (AS? uid)? | uid '.' '*'
; ;
fromClause
: FROM tableExpression
;
tableExpression tableExpression
: tableReference (COMMA tableReference)* : tableReference (COMMA tableReference)*
; ;
@ -182,6 +190,39 @@ tablePrimary
: TABLE? uid : 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
expression expression
@ -227,7 +268,7 @@ primaryExpression
| FIRST '(' expression (IGNORE NULLS)? ')' #first | FIRST '(' expression (IGNORE NULLS)? ')' #first
| LAST '(' expression (IGNORE NULLS)? ')' #last | LAST '(' expression (IGNORE NULLS)? ')' #last
| POSITION '(' substr=valueExpression IN str=valueExpression ')' #position | POSITION '(' substr=valueExpression IN str=valueExpression ')' #position
| constant #constantDefault // | constant #constantDefault
| ASTERISK #star | ASTERISK #star
// | qualifiedName '.' ASTERISK #star // | qualifiedName '.' ASTERISK #star
// | '(' namedExpression (',' namedExpression)+ ')' #rowConstructor // | '(' namedExpression (',' namedExpression)+ ')' #rowConstructor
@ -236,8 +277,8 @@ primaryExpression
// (FILTER '(' WHERE where=booleanExpression ')')? (OVER windowSpec)? #functionCall // (FILTER '(' WHERE where=booleanExpression ')')? (OVER windowSpec)? #functionCall
// | identifier '->' expression #lambda // | identifier '->' expression #lambda
// | '(' identifier (',' identifier)+ ')' '->' expression #lambda // | '(' identifier (',' identifier)+ ')' '->' expression #lambda
| value=primaryExpression LS_BRACKET index=valueExpression RS_BRACKET #subscript // | value=primaryExpression LS_BRACKET index=valueExpression RS_BRACKET #subscript
// | identifier #columnReference | identifier #columnReference
// | base=primaryExpression '.' fieldName=identifier #dereference // | base=primaryExpression '.' fieldName=identifier #dereference
| '(' expression ')' #parenthesizedExpression | '(' expression ')' #parenthesizedExpression
// | EXTRACT '(' field=identifier FROM source=valueExpression ')' #extract // | EXTRACT '(' field=identifier FROM source=valueExpression ')' #extract
@ -685,9 +726,6 @@ RR_BRACKET: ')';
COMMA: ','; COMMA: ',';
SEMICOLON: ';'; SEMICOLON: ';';
AT_SIGN: '@'; AT_SIGN: '@';
ZERO_DECIMAL: '0';
ONE_DECIMAL: '1';
TWO_DECIMAL: '2';
SINGLE_QUOTE_SYMB: '\''; SINGLE_QUOTE_SYMB: '\'';
DOUBLE_QUOTE_SYMB: '"'; DOUBLE_QUOTE_SYMB: '"';
REVERSE_QUOTE_SYMB: '`'; REVERSE_QUOTE_SYMB: '`';