add base dml and ddl .g4 files

sharding-jdbc-ddl-parser/pom.xml

+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>io.sharding</groupId>
+	<artifactId>sharding-jdbc-ddl-parser</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<packaging>jar</packaging>
+
+	<name>sharding-jdbc-ddl-parser</name>
+	<url>http://maven.apache.org</url>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.antlr</groupId>
+			<artifactId>antlr4</artifactId>
+			<version>4.7.1</version>
+		</dependency>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>3.8.1</version>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+</project>

sharding-jdbc-ddl-parser/src/main/resources/io/shardingsphere/parser/antlr/DDLBase.g4

+grammar DDLBase;
+
+import SQLBase, Keyword, Symbol;
+
+execute:
+	alterTable
+	
+	;
+	
+alterTable:
+    ALTER TABLE prefixTableName tableName alterSpecifications? partitionOptions?
+	;
+
+prefixTableName:
+    ; 	
+
+alterSpecifications:
+	;
+
+partitionOptions:
+	;

sharding-jdbc-ddl-parser/src/main/resources/io/shardingsphere/parser/antlr/DMLBase.g4

+grammar DMLBase;
+
+import SQLBase, Keyword, Symbol;
+
+execute:
+	select
+	|insert
+	|update
+	|delete
+	;
+	
+insert:
+	;
+	
+//define delete rule template 
+select: 
+	withClause
+	|unionSelect
+	;
+
+withClause:
+	WITH RECURSIVE? cteClause (COMMA cteClause)*
+	unionSelect
+	;
+
+cteClause:
+	cteName itemList? AS subquery
+	;
+	
+cteName:
+   ID
+   ;
+   
+   	
+unionSelect:
+	selectExpression (UNION ALL? selectExpression)*
+	;
+
+selectExpression:
+	selectClause 
+	fromClause? 
+	whereClause? 
+	groupByClause? 
+	orderByClause? 
+	limitClause?
+	;
+	
+selectClause:
+	SELECT selectSpec selectExprs
+	;
+	
+selectSpec:
+	;
+fromClause: 
+	FROM tableReferences
+	;
+	
+tableReferences:
+	;
+		
+whereClause: 
+	WHERE expr
+	;
+	
+groupByClause: 
+	GROUP BY groupByItem (COMMA groupByItem)* 
+	(WITH ROLLUP)? 
+	havingClause?
+	;
+	
+havingClause: 
+	HAVING  expr
+	;
+	
+orderByClause: 
+	ORDER BY groupByItem (COMMA groupByItem)*
+	;
+	
+groupByItem:
+	(columnName | NUMBER |expr)  (ASC|DESC)?
+	;
+	
+limitClause:
+	LIMIT rangeClause
+	;
+	
+rangeClause:
+	NUMBER (COMMA  NUMBER)* 
+	| NUMBER OFFSET NUMBER
+	;
+    
+subquery:
+	LEFT_PAREN unionSelect RIGHT_PAREN
+	;
+	
+selectExprs:
+    (ASTERISK (COMMA selectExpr)*) 
+    |selectExpr (COMMA ASTERISK)? (COMMA selectExpr)*
+    ;
+     
+selectExpr:
+	bitExpr AS? alias?
+	;
+
+bitExpr:
+	;
+ 
+alias:
+	ID
+	;
+
+//define delete rule template
+delete: 
+	deleteClause 
+	whereClause? 
+	orderByClause? 
+	limitClause?
+	;
+
+deleteClause:
+	;
+	
+partitionClause: 
+	PARTITION itemList
+	;
+
+update: 
+	updateClause 
+	setClause 
+	whereClause? 
+	orderByClause? 
+	limitClause?
+	;
+
+updateClause:
+	;
+	
+updateSpec: 
+	;
+
+setClause: 
+	SET assignmentList
+	;
+	
+assignmentList: 
+	assignment (COMMA assignment)*
+	;
+	
+assignment:
+	columnName EQ_OR_ASSIGN value
+	;
+	
+value:
+	DEFAULT
+	|expr
+	;
+
+expr:
+	;

sharding-jdbc-ddl-parser/src/main/resources/io/shardingsphere/parser/antlr/Keyword.g4

+lexer grammar Keyword;
+
+import Symbol;
+    
+SELECT: S E L E C T;
+ALL: A L L;
+ANY: A N Y;
+DISTINCT: D I S T I N C T;
+
+FROM: F R O M;
+PARTITION: P A R T I T I O N;
+WHERE: W H E R E;
+GROUP: G R O U P;
+BY: B Y;
+ASC: A S C;
+DESC: D E S C;
+WITH: W I T H;
+RECURSIVE: R E C U R S I V E;
+ROLLUP: R O L L U P;
+HAVING: H A V I N G;
+WINDOW: W I N D O W;
+AS: A S;
+ORDER: O R D E R;
+LIMIT: L I M I T;
+OFFSET: O F F S E T;
+INTO: I N T O;
+
+ALTER: A L T E R;
+TABLE: T A B L E;
+COLUMN: C O L U M N;
+ADD: A D D;
+DROP: D R O P;
+ENABLE: E N A B L E;
+DISABLE: D I S A B L E;
+CONSTRAINT: C O N S T R A I N T;
+UNIQUE: U N I Q U E;
+FULLTEXT: F U L L T E X T;
+FOREIGN: F O R E I G N;
+NONE: N O N E;
+MODIFY: M O D I F Y; 
+RENAME: R E N A M E;
+VALIDATION: V A L I D A T I O N;
+IMPORT_: I M P O R T;
+TABLESPACE: T A B L E S P A C E;
+TRUNCATE: T R U N C A T E; 
+ANALYZE: A N A L Y Z E; 
+CHECK: C H E C K;
+OPTIMIZE: O P T I M I Z E;
+REBUILD: R E B U I L D;
+REPAIR: R E P A I R;
+REMOVE: R E M O V E;
+UPGRADE: U P G R A D E;
+TO: T O;
+COPY: C O P Y;
+PRIMARY: P R I M A R Y;
+KEYS: K E Y S;
+WITHOUT: W I T H O U T;
+COALESCE: C O A L E S C E;
+
+SET: S E T;
+FOR: F O R;
+UPDATE: U P D A T E;
+SHARE: S H A R E;
+OF: O F;
+NOWAIT: N O W A I T;
+
+LOCKED: L O C K E D;
+LOCK: L O C K;
+IN: I N;
+MODE: M O D E;
+
+INNER: I N N E R;
+CROSS: C R O S S;
+JOIN: J O I N;
+ON: O N;
+LEFT: L E F T;
+RIGHT: R I G H T;
+OUTER: O U T E R;
+NATURAL: N A T U R A L;
+USING: U S I N G;
+USE: U S E;
+INDEX: I N D E X;
+KEY: K E Y;
+IGNORE: I G N O R E;
+FORCE: F O R C E;
+UNION: U N I O N;
+
+
+DEFAULT: D E F A U L T;
+DELETE: D E L E T E;
+QUICK: Q U I C K;
+INSERT: I N S E R T;
+
+VALUES: V A L U E S;
+VALUE: V A L U E;
+DUPLICATE: D U P L I C A T E;
+
+EXISTS: E X I S T S;
+IS: I S;
+AND: A N D;
+OR: O R;
+XOR: X O R;
+NOT: N O T;
+
+
+BETWEEN: B E T W E E N;
+NULL: N U L L;
+TRUE:T R U E;
+FALSE : F A L S E;
+UNKNOWN: U N K N O W N;
+
+SOUNDS: S O U N D S; 
+LIKE: L I K E;
+DIV: D I V;
+MOD: M O D;
+BINARY: B I N A R Y;
+ROW: R O W;
+ESCAPE: E S C A P E;
+REGEXP: R E G E X P; 
+
+DATE: D A T E;
+TIME: T I M E;
+TIMESTAMP:TIME S T A M P;
+
+CASE: C A S E;
+WHEN: W H E N;
+THEN: T H E N;
+IF: I F;
+ELSE: E L S E;
+END: E N D;
+
+
+ID: 
+	(BACK_QUOTA?[a-zA-Z_$][a-zA-Z0-9_$]* BACK_QUOTA? DOT)?
+	(BACK_QUOTA?[a-zA-Z_$][a-zA-Z0-9_$]* BACK_QUOTA?)
+	|[a-zA-Z_$0-9]+ DOT ASTERISK
+	;

sharding-jdbc-ddl-parser/src/main/resources/io/shardingsphere/parser/antlr/MySQLBase.g4

+grammar MySQLBase;
+
+import MySQLKeyword,SQLBase,Keyword,Symbol;
+
+//https://dev.mysql.com/doc/refman/8.0/en/expressions.html
+expr:
+	expr OR expr
+  	| expr OR_SYM  expr
+  	| expr XOR expr
+  	| expr AND expr
+ 	| expr AND_SYM expr
+ 	| LEFT_PAREN expr RIGHT_PAREN
+  	| NOT expr
+  	| NOT_SYM expr
+  	| booleanPrimary
+	;
+	
+booleanPrimary:
+    booleanPrimary IS NOT? (TRUE | FALSE | UNKNOWN |NULL)
+  	| booleanPrimary SAFE_EQ predicate
+ 	| booleanPrimary comparisonOperator predicate
+  	| booleanPrimary comparisonOperator (ALL | ANY) subquery
+  	| predicate
+  	;
+
+comparisonOperator:
+	EQ_OR_ASSIGN | GTE | GT | LTE | LT | NEQ_SYM | NEQ
+	;
+
+predicate:
+	bitExpr NOT? IN subquery
+	| bitExpr NOT? IN LEFT_PAREN simpleExpr ( COMMA  simpleExpr)* RIGHT_PAREN
+	| bitExpr NOT? BETWEEN simpleExpr AND predicate
+	| bitExpr SOUNDS LIKE simpleExpr
+	| bitExpr NOT? LIKE simpleExpr (ESCAPE simpleExpr)*
+	| bitExpr NOT? REGEXP simpleExpr
+	| bitExpr
+	;
+  
+bitExpr:
+	bitExpr BIT_INCLUSIVE_OR bitExpr
+	| bitExpr BIT_AND bitExpr
+	| bitExpr SIGNED_LEFT_SHIFT bitExpr
+	| bitExpr SIGNED_RIGHT_SHIFT bitExpr
+	| bitExpr PLUS bitExpr
+	| bitExpr MINUS bitExpr
+	| bitExpr ASTERISK bitExpr
+	| bitExpr SLASH bitExpr
+	| bitExpr DIV bitExpr
+	| bitExpr MOD bitExpr
+	| bitExpr MOD_SYM bitExpr
+	| bitExpr BIT_EXCLUSIVE_OR bitExpr
+	//| bitExpr '+' interval_expr
+	//| bitExpr '-' interval_expr
+	| simpleExpr
+	;
+	
+simpleExpr:
+	| functionCall
+	| liter
+	| ID
+	| simpleExpr collateClause
+	//| param_marker
+	//| variable
+	| simpleExpr AND_SYM simpleExpr
+	| PLUS simpleExpr
+	| MINUS simpleExpr
+	| UNARY_BIT_COMPLEMENT simpleExpr
+	| NOT_SYM simpleExpr
+	| BINARY simpleExpr
+	| LEFT_PAREN expr RIGHT_PAREN
+	| ROW LEFT_PAREN simpleExpr( COMMA  simpleExpr)* RIGHT_PAREN
+	| subquery
+	| EXISTS subquery
+	// | (identifier expr)
+	//| match_expr
+	//| case_expr
+	// | interval_expr 
+	;
+ 
+liter:
+	QUESTION
+	|INT
+	|NUMBER
+	|TRUE 
+	|FALSE
+	|NULL
+	|LEFT_BRACE ID STRING RIGHT_BRACE //
+	|HEX_DIGIT
+	|ID? STRING  collateClause?
+	|(DATE | TIME |TIMESTAMP)STRING
+	|ID? BIT_NUM collateClause?
+	; 
+
+subquery:
+	;
+	
+collateClause:
+	COLLATE ID
+	;
+
+functionCall:
+	ID LEFT_PAREN(|expr ( COMMA  expr)*) RIGHT_PAREN
+	;
+
+value:
+	DEFAULT|expr;
+
+valueList:
+	 value (COMMA value)*
+	;
+	
+valueListWithParen:
+	LEFT_PAREN valueList RIGHT_PAREN
+	;
+	
+columnList:
+	LEFT_PAREN columnName (COMMA columnName)* RIGHT_PAREN
+	;
\ No newline at end of file

sharding-jdbc-ddl-parser/src/main/resources/io/shardingsphere/parser/antlr/MySQLKeyword.g4

+lexer grammar MySQLKeyword;
+
+import Symbol;
+   
+FIRST: F I R S T;
+AFTER: A F T E R;
+SPATIAL: S P A T I A L;
+ALGORITHM: A L G O R I T H M;
+CHANGE: C H A N G E;
+DISCARD: D I S C A R D;
+CHARACTER: C H A R A C T E R;
+COLLATE: C O L L A T E;
+CONVERT: C O N V E R T;
+SHARED: S H A R E D;
+EXCLUSIVE: E X C L U S I V E;
+REORGANIZE: R E O R G A N I Z E;
+EXCHANGE: E X C H A N G E;
+BTREE: B T R E E;
+HASH: H A S H;
+
+
+KEY_BLOCK_SIZE: K E Y UL_ B L O C K UL_ S I Z E;
+PARSER: P A R S E R;
+COMMENT: C O M M E N T;
+AUTO_INCREMENT: A U T O UL_ I N C R E M E N T;
+AVG_ROW_LENGTH: A V G UL_ R O W UL_ L E N G T H;
+CHECKSUM: C H E C K S U M;
+COMPRESSION: C O M P R E S S I O N;
+ZLIB: Z L I B;
+LZ: L Z;
+CONNECTION: C O N N E C T I O N;
+DATA: D A T A;
+DIRECTORY: D I R E C T O R Y;
+DELAY_KEY_WRITE: D E L A Y UL_ K E Y UL_ W R I T E;
+ENCRYPTION: E N C R Y P T I O N;
+ENGINE: E N G I N E;
+INSERT_METHOD: I N S E R T UL_ M E T H O D;
+NO: N O;
+LAST: L A S T;
+MAX_ROWS: M A X UL_ R O W S;
+MIN_ROWS: M I N UL_ R O W S;
+PACK_KEYS: P A C K UL_ K E Y S;
+PASSWORD: P A S S W O R D;
+ROW_FORMAT: R O W UL_ F O R M A T;
+DYNAMIC: D Y N A M I C;
+FIXED: F I X E D;
+COMPRESSED: C O M P R E S S E D;
+REDUNDANT: R E D U N D A N T;
+COMPACT: C O M P A C T;
+STATS_AUTO_RECALC: S T A T S UL_ A U T O UL_ R E C A L C;
+STATS_PERSISTENT: S T A T S UL_ P E R S I S T E N T;
+STATS_SAMPLE_PAGES: S T A T S UL_ S A M P L E UL_ P A G E S;
+STORAGE: S T O R A G E;
+DISK: D I S K;
+MEMORY: M E M O R Y;
+PARTITIONING: P A R T I T I O N I N G;
+GENERATED: G E N E R A T E D;
+ALWAYS: A L W A Y S;
+COLUMN_FORMAT: C O L U M N UL_ F O R M A T;
+VIRTUAL: V I R T U A L;
+STORED: S T O R E D;
+INPLACE: I N P L A C E;
+SUBPARTITION: S U B P A R T I T I O N;
+MAXVALUE: M A X V A L U E;
+LESS: L E S S;
+THAN: T H A N;  
+
+DISTINCTROW: D I S T I N C T R O W;
+HIGH_PRIORITY: H I G H UL_ P R I O R I T Y;
+STRAIGHT_JOIN: S T R A I G H T UL_ J O I N;
+SQL_SMALL_RESULT: S Q L UL_ S M A L L UL_ R E S U L T;
+SQL_BIG_RESULT: S Q L UL_ B I G UL_ R E S U L T;
+SQL_BUFFER_RESULT: S Q L UL_ B U F F E R UL_ R E S U L T;
+SQL_CACHE: S Q L UL_ C A C H E;
+SQL_NO_CACHE: S Q L UL_ N O UL_ C A C H E;
+SQL_CALC_FOUND_ROWS: S Q L UL_ C A L C UL_ F O U N D UL_ R O W S;
+
+REFERENCES: R E F E R E N C E S;
+MATCH: M A T C H; 
+FULL: F U L L;
+PARTIAL: P A R T I A L;
+SIMPLE: S I M P L E;
+
+RESTRICT: R E S T R I C T;
+CASCADE: C A S C A D E ;
+ACTION: A C T I O N;
+
+LINEAR: L I N E A R;
+COLUMNS: C O L U M N S;
+RANGE: R A N G E;
+LIST: L I S T;
+PARTITIONS: P A R T I T I O N S;
+SUBPARTITIONS: S U B P A R T I T I O N S;
+
+OUTFILE: O U T F I L E;
+DUMPFILE: D U M P F I L E;
+
+SKIP_: S K I P;
+OJ: O J;
+
+LOW_PRIORITY: L O W UL_ P R I O R I T Y;
+
+DELAYED: D E L A Y E D;
+

sharding-jdbc-ddl-parser/src/main/resources/io/shardingsphere/parser/antlr/SQLBase.g4

+grammar SQLBase;
+
+import Keyword,Symbol;
+
+
+expr:
+	;
+
+itemList:
+    LEFT_PAREN item (COMMA  item)* RIGHT_PAREN
+    ;
+    
+item:
+	;
+
+schemaName: ID;
+tableName: ID;
+columnName: ID; 
+
+STRING: 
+	DOUBLE_QUOTA ('\\"'|.)*? DOUBLE_QUOTA
+    |SINGLE_QUOTA (SINGLE_QUOTA |.)*? SINGLE_QUOTA
+	;
+    
+ INT :
+   '0' | [1-9] [0-9]*
+   ;
+
+
+NUMBER:
+     MINUS? INT DOT [0-9]+ EXP?
+     |MINUS? INT | EXP
+     |MINUS? INT
+     ;
+       
+EXP :
+    E [+\-]? INT
+    ;
+    
+fragment HEX : 
+	[0-9a-fA-F] 
+	;
+	
+HEX_DIGIT:
+	'0x' HEX+
+	|'X' SINGLE_QUOTA HEX+ SINGLE_QUOTA
+	;
+
+BIT_NUM:
+	('0b' ('0'|'1')+)
+	|
+	(B SINGLE_QUOTA ('0'|'1')+ SINGLE_QUOTA) 
+	;
+	
+WS:  
+	[ \t\r\n] + ->skip
+	;

sharding-jdbc-ddl-parser/src/main/resources/io/shardingsphere/parser/antlr/Symbol.g4

+lexer grammar Symbol;
+    
+AND_SYM: '&&';
+OR_SYM: '||';
+NOT_SYM: '!';
+
+UNARY_BIT_COMPLEMENT: '~';
+BIT_INCLUSIVE_OR: '|';
+BIT_AND: '&';
+SIGNED_LEFT_SHIFT: '<<';
+SIGNED_RIGHT_SHIFT: '>>';
+BIT_EXCLUSIVE_OR: '^';
+MOD_SYM: '%';
+
+
+PLUS: '+' ;
+MINUS: '-' ;
+ASTERISK: '*' ;
+SLASH: '/' ;
+DOT: '.';
+
+SAFE_EQ: '<=>';
+EQ: '==';
+EQ_OR_ASSIGN: '=';
+NEQ: '!=';
+NEQ_SYM: '<>';
+GT: '>';
+GTE: '>=';
+LT: '<' ;
+LTE: '<=' ;
+
+LEFT_PAREN: '(';
+RIGHT_PAREN: ')';
+LEFT_BRACE: '{';
+RIGHT_BRACE: '}';
+COMMA: ',';
+DOUBLE_QUOTA: '"';
+SINGLE_QUOTA: '\'';
+BACK_QUOTA: '`';
+UL_: '_';
+QUESTION: '?' ;
+
+fragment A: [Aa];
+fragment B: [Bb];
+fragment C: [Cc];
+fragment D: [Dd];
+fragment E: [Ee];
+fragment F: [Ff];
+fragment G: [Gg];
+fragment H: [Hh];
+fragment I: [Ii];
+fragment J: [Jj];
+fragment K: [Kk];
+fragment L: [Ll];
+fragment M: [Mm];
+fragment N: [Nn];
+fragment O: [Oo];
+fragment P: [Pp];
+fragment Q: [Qq];
+fragment R: [Rr];
+fragment S: [Ss];
+fragment T: [Tt];
+fragment U: [Uu];
+fragment V: [Vv];
+fragment W: [Ww];
+fragment X: [Xx];
+fragment Y: [Yy];
+fragment Z: [Zz];