bug fixed for mysql sql parser. fixed issue #2065

src/main/java/com/alibaba/druid/sql/ast/statement/SQLCheck.java

@@ -18,7 +18,7 @@ package com.alibaba.druid.sql.ast.statement;
 import com.alibaba.druid.sql.ast.SQLExpr;
 import com.alibaba.druid.sql.visitor.SQLASTVisitor;
 
-public class SQLCheck extends SQLConstraintImpl implements SQLTableElement {
+public class SQLCheck extends SQLConstraintImpl implements SQLTableElement, SQLTableConstraint {
 
     private SQLExpr expr;
 
@@ -34,11 +34,11 @@ public class SQLCheck extends SQLConstraintImpl implements SQLTableElement {
         return expr;
     }
 
-    public void setExpr(SQLExpr expr) {
-        if (expr != null) {
-            expr.setParent(this);
+    public void setExpr(SQLExpr x) {
+        if (x != null) {
+            x.setParent(this);
         }
-        this.expr = expr;
+        this.expr = x;
     }
 
     @Override

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

@@ -849,7 +849,7 @@ public class MySqlCreateTableParser extends SQLCreateTableParser {
                 pk.setName(name);
             }
             pk.setHasConstaint(hasConstaint);
-            return (SQLTableConstraint) pk;
+            return pk;
         }
 
         if (lexer.token() == Token.UNIQUE) {
@@ -858,14 +858,23 @@ public class MySqlCreateTableParser extends SQLCreateTableParser {
                 uk.setName(name);
             }
             uk.setHasConstaint(hasConstaint);
-            return (SQLTableConstraint) uk;
+            return uk;
         }
 
         if (lexer.token() == Token.FOREIGN) {
             MysqlForeignKey fk = this.getExprParser().parseForeignKey();
             fk.setName(name);
             fk.setHasConstraint(hasConstaint);
-            return (SQLTableConstraint) fk;
+            return fk;
+        }
+
+        if (lexer.token() == Token.CHECK) {
+            lexer.nextToken();
+            SQLCheck check = new SQLCheck();
+            check.setName(name);
+            SQLExpr expr = this.exprParser.expr();
+            check.setExpr(expr);
+            return check;
         }
 
         throw new ParserException("TODO. " + lexer.info());