mysql parser ddl support

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlStatementParser.java

@@ -54,6 +54,7 @@ import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlKillStatement;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlLoadDataInFileStatement;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlLoadXmlStatement;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlPrepareStatement;
+import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlRenameTableStatement;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlReplicateStatement;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlResetStatement;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlRollbackStatement;
@@ -1970,4 +1971,30 @@ public class MySqlStatementParser extends SQLStatementParser {
         }
         throw new ParserException("TODO " + lexer.token() + " " + lexer.stringVal());
     }
+    
+    public SQLStatement parseRename() {
+        MySqlRenameTableStatement stmt = new MySqlRenameTableStatement();
+        
+        acceptIdentifier("RENAME");
+        
+        accept(Token.TABLE);
+        
+        for (;;) {
+            MySqlRenameTableStatement.Item item = new MySqlRenameTableStatement.Item();
+            item.setName(this.exprParser.name());
+            acceptIdentifier("TO");
+            item.setTo(this.exprParser.name());
+         
+            stmt.getItems().add(item);
+            
+            if (lexer.token() == Token.COMMA) {
+                lexer.nextToken();
+                continue;
+            }
+            
+            break;
+        }
+        
+        return stmt;
+    }
 }

src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlOutputVisitor.java

@@ -2265,7 +2265,7 @@ public class MySqlOutputVisitor extends SQLASTOutputVisitor implements MySqlASTV
 
     @Override
     public boolean visit(MySqlRenameTableStatement x) {
-        print("RENAME ");
+        print("RENAME TABLE ");
         printAndAccept(x.getItems(), ", ");
         return false;
     }

src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleExprParser.java

@@ -381,7 +381,7 @@ public class OracleExprParser extends SQLExprParser {
                 accept(Token.RPAREN);
             }
             
-            accept(Token.TO);
+            identifierEquals("TO");
             if (identifierEquals("SECOND")) {
                 lexer.nextToken();
                 interval.setToType(OracleIntervalType.SECOND);
@@ -702,8 +702,8 @@ public class OracleExprParser extends SQLExprParser {
             accept(Token.RPAREN);
         }
         
-        if (lexer.token() == Token.TO) {
-            accept(Token.TO);
+        if (identifierEquals("TO")) {
+            lexer.nextToken();
             if (identifierEquals("SECOND")) {
                 lexer.nextToken();
                 interval.setToType(OracleIntervalType.SECOND);

src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleLexer.java

@@ -98,7 +98,6 @@ public class OracleLexer extends Lexer {
 
         map.put("CURSOR", Token.CURSOR);
         
-        map.put("TO", Token.TO);
         map.put("MODEL", Token.MODEL);
         map.put("MERGE", Token.MERGE);
         map.put("USING", Token.USING);

src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleSelectParser.java

@@ -140,7 +140,7 @@ public class OracleSelectParser extends SQLSelectParser {
                     createExprParser().exprList(cycleClause.getAliases());
                     accept(Token.SET);
                     cycleClause.setMark(createExprParser().expr());
-                    accept(Token.TO);
+                    acceptIdentifier("TO");
                     cycleClause.setValue(createExprParser().expr());
                     accept(Token.DEFAULT);
                     cycleClause.setDefaultValue(createExprParser().expr());

src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleStatementParser.java

@@ -388,7 +388,7 @@ public class OracleStatementParser extends SQLStatementParser {
 
                 OracleRollbackStatement stmt = new OracleRollbackStatement();
 
-                if (lexer.token() == Token.TO) {
+                if (identifierEquals("TO")) {
                     lexer.nextToken();
                     stmt.setTo(this.exprParser.name());
                 }
@@ -402,7 +402,7 @@ public class OracleStatementParser extends SQLStatementParser {
 
                 OracleSavePointStatement stmt = new OracleSavePointStatement();
 
-                if (lexer.token() == Token.TO) {
+                if (identifierEquals("TO")) {
                     lexer.nextToken();
                     stmt.setTo(this.exprParser.name());
                 }
@@ -640,7 +640,7 @@ public class OracleStatementParser extends SQLStatementParser {
 
             if (identifierEquals("RENAME")) {
                 lexer.nextToken();
-                accept(Token.TO);
+                acceptIdentifier("TO");
                 stmt.setRenameTo(this.exprParser.name());
             }
 
@@ -915,7 +915,7 @@ public class OracleStatementParser extends SQLStatementParser {
     private OracleAlterTableItem parseAlterTableRename() {
         acceptIdentifier("RENAME");
 
-        if (lexer.token() == Token.TO) {
+        if (identifierEquals("TO")) {
             lexer.nextToken();
             OracleAlterTableRenameTo item = new OracleAlterTableRenameTo();
             item.setTo(this.exprParser.name());

src/main/java/com/alibaba/druid/sql/parser/Token.java

@@ -139,7 +139,6 @@ public enum Token {
     WITH("WITH"),
     EXTRACT("EXTRACT"),
     CURSOR("CURSOR"),
-    TO("TO"),
     MODEL("MODEL"),
     MERGE("MERGE"),
     MATCHED("MATCHED"),