sql parser refactor

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

@@ -25,8 +25,8 @@ public class SQLCreateTableParser extends SQLDDLParser {
         super(sql);
     }
 
-    public SQLCreateTableParser(Lexer lexer){
-        super(lexer);
+    public SQLCreateTableParser(SQLExprParser exprParser){
+        super(exprParser);
     }
 
     public SQLCreateTableStatement parseCrateTable() {

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

@@ -24,8 +24,8 @@ public class SQLDDLParser extends SQLStatementParser {
         super(sql);
     }
 
-    public SQLDDLParser(Lexer lexer){
-        super(lexer);
+    public SQLDDLParser(SQLExprParser exprParser){
+        super(exprParser);
     }
 
     protected SQLTableConstaint parseConstraint() {

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

@@ -59,6 +59,11 @@ public class SQLStatementParser extends SQLParser {
         super(lexer);
         this.exprParser = new SQLExprParser(lexer);
     }
+    
+    public SQLStatementParser(SQLExprParser exprParser){
+        super(exprParser.getLexer());
+        this.exprParser = exprParser;
+    }
 
     public SQLExprParser getExprParser() {
         return exprParser;
@@ -476,7 +481,7 @@ public class SQLStatementParser extends SQLParser {
     }
 
     public SQLCreateTableParser getSQLCreateTableParser() {
-        return new SQLCreateTableParser(lexer);
+        return new SQLCreateTableParser(this.exprParser);
     }
 
     public SQLSelectStatement parseSelect() throws ParserException {