sql parser refactor

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

@@ -176,7 +176,7 @@ public class MySqlCreateTableParser extends SQLCreateTableParser {
         }
 
         if (lexer.token() == (Token.SELECT)) {
-            SQLSelect query = new MySqlSelectParser(this.lexer).select();
+            SQLSelect query = new MySqlSelectParser(this.exprParser).select();
             stmt.setQuery(query);
         }
 

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

@@ -454,7 +454,7 @@ public class MySqlExprParser extends SQLExprParser {
     }
 
     public SQLSelectParser createSelectParser() {
-        return new MySqlSelectParser(this.lexer);
+        return new MySqlSelectParser(this);
     }
 
     protected SQLExpr parseInterval() {

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

@@ -33,20 +33,19 @@ import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectGroupBy;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock.Limit;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlUnionQuery;
-import com.alibaba.druid.sql.parser.Lexer;
 import com.alibaba.druid.sql.parser.ParserException;
+import com.alibaba.druid.sql.parser.SQLExprParser;
 import com.alibaba.druid.sql.parser.SQLSelectParser;
 import com.alibaba.druid.sql.parser.Token;
 
 public class MySqlSelectParser extends SQLSelectParser {
 
-    public MySqlSelectParser(Lexer lexer){
-        super(lexer);
+    public MySqlSelectParser(SQLExprParser exprParser){
+        super(exprParser);
     }
 
     public MySqlSelectParser(String sql) throws ParserException{
-        this(new MySqlLexer(sql));
-        this.lexer.nextToken();
+        this(new MySqlExprParser(sql));
     }
 
     @Override

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

@@ -144,7 +144,7 @@ public class MySqlStatementParser extends SQLStatementParser {
     }
 
     public SQLSelectStatement parseSelect() throws ParserException {
-        return new SQLSelectStatement(new MySqlSelectParser(lexer).select());
+        return new SQLSelectStatement(new MySqlSelectParser(this.exprParser).select());
     }
 
     public SQLUpdateStatement parseUpdateStatement() throws ParserException {
@@ -1917,7 +1917,7 @@ public class MySqlStatementParser extends SQLStatementParser {
     }
 
     public SQLSelectParser createSQLSelectParser() {
-        return new MySqlSelectParser(this.lexer);
+        return new MySqlSelectParser(this.exprParser);
     }
 
     public SQLStatement parseSet() throws ParserException {