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add: grammar doc.
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‎README.md‎

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[![NPM Version][npm-image]][npm-url]
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[![NPM Downloads][downloads-image]][downloads-url]
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sql grammar follows https://dev.mysql.com/doc/refman/5.7/en/select.html
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## commonjs usage
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`npm install --save js-sql-parser`

‎dist/parser/sqlParser.js‎

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‎src/grammar.jison‎

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‎src/sqlParser.jison‎

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%%
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\s+ /* skip whitespace */
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[/][*](.|\n)*?[*][/] /* skip comments */
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[-][-]\s.*\n /* skip sql comments */
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[/][*](.|\n)*?[*][/] /* skip comments */
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[-][-]\s.*\n /* skip sql comments */
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[#]\s.*\n /* skip sql comments */
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\s+ /* skip whitespace */
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SELECT return 'SELECT'
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ALL return 'ALL'
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DISTINCT return 'DISTINCT'
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DISTINCTROW return 'DISTINCTROW'
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HIGH_PRIORITY return 'HIGH_PRIORITY'
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MAX_STATEMENT_TIME return 'MAX_STATEMENT_TIME'
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STRAIGHT_JOIN return 'STRAIGHT_JOIN'
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SQL_SMALL_RESULT return 'SQL_SMALL_RESULT'
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SQL_BIG_RESULT return 'SQL_BIG_RESULT'
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SQL_BUFFER_RESULT return 'SQL_BUFFER_RESULT'
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SQL_CACHE return 'SQL_CACHE'
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SQL_NO_CACHE return 'SQL_NO_CACHE'
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SQL_CALC_FOUND_ROWS return 'SQL_CALC_FOUND_ROWS'
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'*' return '*';
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([a-zA-Z_\u4e00-\u9fa5][a-zA-Z0-9_\u4e00-\u9fa5]+\.){1,2}\* return 'SELECT_EXPR_STAR'
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AS return 'AS'
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TRUE return 'TRUE'
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FALSE return 'FALSE'
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NULL return 'NULL'
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SELECT return 'SELECT'
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ALL return 'ALL'
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DISTINCT return 'DISTINCT'
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DISTINCTROW return 'DISTINCTROW'
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',' return ','
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'=' return '='
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'(' return '('
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')' return ')'
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['](\\.|[^'])*['] return 'STRING'
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["](\\.|[^"])*["] return 'STRING'
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[0][x][0-9a-fA-F]+ return 'HEX_NUMERIC'
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[-]?[0-9]+(\.[0-9]+)? return 'NUMERIC'
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[-]?[0-9]+(\.[0-9]+)?[eE][-][0-9]+(\.[0-9]+)? return 'EXPONENT_NUMERIC'
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['](\\.|[^'])*['] return 'STRING'
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["](\\.|[^"])*["] return 'STRING'
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[0-9]+(\.[0-9]+)? return 'NUMERIC'
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<<EOF>> return 'EOF'
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. return 'INVALID'
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[a-zA-Z_\u4e00-\u9fa5][a-zA-Z0-9_\u4e00-\u9fa5]* return 'IDENTIFIER'
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['"][a-zA-Z_\u4e00-\u9fa5][a-zA-Z0-9_\u4e00-\u9fa5]*["'] return 'QUOTED_IDENTIFIER'
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<<EOF>> return 'EOF'
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. return 'INVALID'
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/lex
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@@ -35,9 +61,30 @@ main
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selectClause
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: SELECT
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distinctOpt
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highPriorityOpt
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maxStateMentTimeOpt
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straightJoinOpt
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sqlSmallResultOpt
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sqlBigResultOpt
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sqlBufferResultOpt
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sqlCacheOpt
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sqlNoCacheOpt
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sqlCalcFoundRowsOpt
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selectExprList
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{
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return {
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distinctOpt: $2
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type: 'Select',
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distinctOpt: $2,
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highPriorityOpt: $3,
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maxStateMentTimeOpt: $4,
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straightJoinOpt: $5,
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sqlSmallResultOpt: $6,
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sqlBigResultOpt: $7,
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sqlBufferResultOpt: $8,
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sqlCacheOpt: $9,
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sqlNoCacheOpt: $10,
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sqlCalcFoundRowsOpt: $11,
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selectExprList: $12
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}
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}
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;
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| DISTINCTROW { $$ = $1 }
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| { $$ = null }
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;
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highPriorityOpt
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: HIGH_PRIORITY { $$ = true }
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| { $$ = null }
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;
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maxStateMentTimeOpt
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: MAX_STATEMENT_TIME '=' NUMERIC { $$ = $3 }
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| { $$ = null }
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;
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straightJoinOpt
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: STRAIGHT_JOIN { $$ = true }
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| { $$ = null }
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;
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sqlSmallResultOpt
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: SQL_SMALL_RESULT { $$ = true }
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| { $$ = null }
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;
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sqlBigResultOpt
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: SQL_BIG_RESULT { $$ = true }
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| { $$ = null }
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;
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sqlBufferResultOpt
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: SQL_BUFFER_RESULT { $$ = true }
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| { $$ = null }
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;
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sqlCacheOpt
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: SQL_CACHE { $$ = true }
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| { $$ = null }
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;
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sqlNoCacheOpt
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: SQL_NO_CACHE { $$ = true }
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| { $$ = null }
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;
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sqlCalcFoundRowsOpt
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: SQL_CALC_FOUND_ROWS { $$ = true }
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| { $$ = null }
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;
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selectExprList
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: selectExprList ',' selectExpr { $3.type = 'SelectExpr'; $$.push($3); }
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| selectExpr { $1.type = 'SelectExpr'; $$ = [ $1 ]; }
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;
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selectExpr
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: '*' { $$ = { value: $1 } }
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| SELECT_EXPR_STAR { $$ = { value: $1 } }
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| expr selectExprAliasOpt { $$ = $1; $$.alias = $2.alias; $$.hasAs = $2.hasAs; }
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;
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selectExprAliasOpt
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: { $$ = {alias: null, hasAs: null} }
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| AS IDENTIFIER { $$ = {alias: $2, hasAs: true} }
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| IDENTIFIER { $$ = {alias: $1, hasAs: false} }
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;
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string
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: QUOTED_IDENTIFIER { $$ = $1 }
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| STRING { $$ = $1 }
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;
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number
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: NUMERIC { $$ = $1 }
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| EXPONENT_NUMERIC = { $$ = $1 }
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| HEX_NUMERIC = { $$ = $1 }
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;
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boolean
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: TRUE { $$ = 'TRUE' }
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| FALSE { $$ = 'FALSE' }
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;
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literal
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: string { $$ = $1 }
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| number { $$ = $1 }
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| boolean { $$ = $1 }
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| NULL { $$ = $1 }
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;
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function_call
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: IDENTIFIER '(' function_call_param_list ')' { $$ = {type: 'FunctionCall', name: $1, params: $3} }
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;
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function_call_param_list
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: function_call_param_list ',' function_call_param { $1.push($3); $$ = $1; }
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| function_call_param { $$ = [$1]; }
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;
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function_call_param
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: { $$ = null }
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| NULL { $$ = $1 }
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| '*' { $$ = $1 }
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| SELECT_EXPR_STAR { $$ = $1 }
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| expr { $$ = $1 }
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;
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simple_expr
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: literal { $$ = $1 }
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| IDENTIFIER { $$ = $1 }
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| function_call { $$ = $1 }
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;
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bit_expr
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: simple_expr { $$ = $1 }
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;
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predicate
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: bit_expr { $$ = $1 }
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;
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boolean_primary
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: predicate { $$ = $1 }
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;
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expr
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: boolean_primary { $$ = $1 }
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;

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