diff --git a/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlLexer.java b/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlLexer.java
index 74bfba168d..a7535038a9 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlLexer.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlLexer.java
@@ -112,6 +112,7 @@ public class MySqlLexer extends Lexer {
         map.put("KILL", Token.KILL);
         map.put("IDENTIFIED", Token.IDENTIFIED);
         map.put("PASSWORD", Token.PASSWORD);
+        map.put("DUAL", Token.DUAL);
 
         DEFAULT_MYSQL_KEYWORDS = new Keywords(map);
     }
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlStatementParser.java b/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlStatementParser.java
index d430341685..6b16264f57 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlStatementParser.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlStatementParser.java
@@ -768,7 +768,7 @@ public class MySqlStatementParser extends SQLStatementParser {
 
         if (identifierEquals("ROWS")) {
             lexer.nextToken();
-            acceptIdentifier("IDENTIFIED");
+            accept(Token.IDENTIFIED);
             accept(Token.BY);
             SQLExpr rowsIdentifiedBy = exprParser.expr();
             stmt.setRowsIdentifiedBy(rowsIdentifiedBy);
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlSchemaStatVisitor.java b/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlSchemaStatVisitor.java
index c721d58d96..3548137860 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlSchemaStatVisitor.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlSchemaStatVisitor.java
@@ -5,6 +5,7 @@ import java.util.Map;
 
 import com.alibaba.druid.sql.ast.SQLName;
 import com.alibaba.druid.sql.ast.expr.SQLIdentifierExpr;
+import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
 import com.alibaba.druid.sql.dialect.mysql.ast.MySqlKey;
 import com.alibaba.druid.sql.dialect.mysql.ast.MySqlPrimaryKey;
 import com.alibaba.druid.sql.dialect.mysql.ast.expr.MySqlBinaryExpr;
@@ -43,6 +44,13 @@ import com.alibaba.druid.stat.TableStat.Mode;
 
 public class MySqlSchemaStatVisitor extends SchemaStatVisitor implements MySqlASTVisitor {
 
+    public boolean visit(SQLSelectStatement x) {
+        aliasLocal.set(new HashMap<String, String>());
+        aliasLocal.get().put("DUAL", null);
+        
+        return true;
+    }
+    //DUAL
     public boolean visit(MySqlDeleteStatement x) {
         aliasLocal.set(new HashMap<String, String>());
 
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/postgresql/ast/stmt/PGSelectStatement.java b/src/main/java/com/alibaba/druid/sql/dialect/postgresql/ast/stmt/PGSelectStatement.java
index cd570b372d..1c760e401e 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/postgresql/ast/stmt/PGSelectStatement.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/postgresql/ast/stmt/PGSelectStatement.java
@@ -1,5 +1,6 @@
 package com.alibaba.druid.sql.dialect.postgresql.ast.stmt;
 
+import com.alibaba.druid.sql.ast.statement.SQLSelect;
 import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
 import com.alibaba.druid.sql.dialect.postgresql.ast.PGWithClause;
 import com.alibaba.druid.sql.dialect.postgresql.visitor.PGASTVisitor;
@@ -10,6 +11,13 @@ public class PGSelectStatement extends SQLSelectStatement implements PGSQLStatem
     private static final long serialVersionUID = 1L;
     private PGWithClause      with;
 
+    public PGSelectStatement(){
+    }
+
+    public PGSelectStatement(SQLSelect select){
+        super(select);
+    }
+
     public PGWithClause getWith() {
         return with;
     }
@@ -17,7 +25,7 @@ public class PGSelectStatement extends SQLSelectStatement implements PGSQLStatem
     public void setWith(PGWithClause with) {
         this.with = with;
     }
-    
+
     protected void accept0(SQLASTVisitor visitor) {
         accept0((PGASTVisitor) visitor);
     }
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/postgresql/parser/PGSQLStatementParser.java b/src/main/java/com/alibaba/druid/sql/dialect/postgresql/parser/PGSQLStatementParser.java
index f27dbbf17f..8c9e059d18 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/postgresql/parser/PGSQLStatementParser.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/postgresql/parser/PGSQLStatementParser.java
@@ -15,6 +15,7 @@ import com.alibaba.druid.sql.dialect.postgresql.ast.PGWithClause;
 import com.alibaba.druid.sql.dialect.postgresql.ast.PGWithQuery;
 import com.alibaba.druid.sql.dialect.postgresql.ast.stmt.PGDeleteStatement;
 import com.alibaba.druid.sql.dialect.postgresql.ast.stmt.PGInsertStatement;
+import com.alibaba.druid.sql.dialect.postgresql.ast.stmt.PGSelectStatement;
 import com.alibaba.druid.sql.dialect.postgresql.ast.stmt.PGTruncateStatement;
 import com.alibaba.druid.sql.dialect.postgresql.ast.stmt.PGUpdateStatement;
 import com.alibaba.druid.sql.parser.Lexer;
@@ -311,6 +312,10 @@ public class PGSQLStatementParser extends SQLStatementParser {
         return withQuery;
     }
     
+    public PGSelectStatement parseSelect() throws ParserException {
+        return new PGSelectStatement(createSQLSelectParser().select());
+    }
+    
     public SQLStatement parseWith() {
         PGWithClause with = this.parseWithClause();
         if (lexer.token() == Token.INSERT) {
@@ -318,7 +323,12 @@ public class PGSQLStatementParser extends SQLStatementParser {
             stmt.setWith(with);
             return stmt;
         }
-        
+
+        if (lexer.token() == Token.SELECT) {
+            PGSelectStatement stmt = this.parseSelect();
+            stmt.setWith(with);
+            return stmt;
+        }
         throw new ParserException("TODO");
     }
 }
diff --git a/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java b/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java
index d661f45d4d..ac439eac62 100644
--- a/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java
+++ b/src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java
@@ -198,6 +198,12 @@ public class SQLExprParser extends SQLParser {
                 sqlExpr = new SQLDefaultExpr();
                 lexer.nextToken();
                 break;
+            case USER:
+            case PASSWORD:
+            case DUAL:
+                sqlExpr = new SQLIdentifierExpr(lexer.stringVal());
+                lexer.nextToken();
+                break;
             case CASE:
                 SQLCaseExpr caseExpr = new SQLCaseExpr();
                 lexer.nextToken();
diff --git a/src/main/java/com/alibaba/druid/sql/parser/Token.java b/src/main/java/com/alibaba/druid/sql/parser/Token.java
index 01551c75c0..1d8f33d527 100644
--- a/src/main/java/com/alibaba/druid/sql/parser/Token.java
+++ b/src/main/java/com/alibaba/druid/sql/parser/Token.java
@@ -102,6 +102,7 @@ public enum Token {
     KILL("KILL"),
     IDENTIFIED("IDENTIFIED"),
     PASSWORD("PASSWORD"),
+    DUAL("DUAL"),
     
     //postgresql
     WINDOW("WINDOW"),
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlSelectTest_0.java b/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlSelectTest_0.java
new file mode 100644
index 0000000000..c9f403b4c5
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlSelectTest_0.java
@@ -0,0 +1,43 @@
+package com.alibaba.druid.bvt.sql.mysql;
+
+import java.util.List;
+
+import junit.framework.Assert;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+import com.alibaba.druid.stat.TableStat.Column;
+
+public class MySqlSelectTest_0 extends MysqlTest {
+
+    public void test_0() throws Exception {
+        String sql = "SELECT CONCAT(last_name,', ',first_name) AS full_name FROM mytable ORDER BY full_name;";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement statemen = statementList.get(0);
+        System.out.println(output(statementList));
+
+        Assert.assertEquals(1, statementList.size());
+
+        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        statemen.accept(visitor);
+
+        System.out.println("Tables : " + visitor.getTables());
+        System.out.println("fields : " + visitor.getFields());
+        System.out.println("coditions : " + visitor.getConditions());
+
+        Assert.assertEquals(1, visitor.getTables().size());
+        Assert.assertEquals(3, visitor.getFields().size());
+        Assert.assertEquals(0, visitor.getConditions().size());
+
+        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("mytable")));
+
+        Assert.assertTrue(visitor.getFields().contains(new Column("mytable", "last_name")));
+        Assert.assertTrue(visitor.getFields().contains(new Column("mytable", "first_name")));
+        Assert.assertTrue(visitor.getFields().contains(new Column("mytable", "full_name")));
+    }
+}
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlSelectTest_1.java b/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlSelectTest_1.java
new file mode 100644
index 0000000000..fb5db3fb7e
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlSelectTest_1.java
@@ -0,0 +1,44 @@
+package com.alibaba.druid.bvt.sql.mysql;
+
+import java.util.List;
+
+import junit.framework.Assert;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
+import com.alibaba.druid.stat.TableStat;
+import com.alibaba.druid.stat.TableStat.Column;
+
+public class MySqlSelectTest_1 extends MysqlTest {
+
+    public void test_0() throws Exception {
+        String sql = "SELECT t1.name, t2.salary FROM employee t1, info t2  WHERE t1.name = t2.name;";
+
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement statemen = statementList.get(0);
+        System.out.println(output(statementList));
+
+        Assert.assertEquals(1, statementList.size());
+
+        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+        statemen.accept(visitor);
+
+        System.out.println("Tables : " + visitor.getTables());
+        System.out.println("fields : " + visitor.getFields());
+        System.out.println("coditions : " + visitor.getConditions());
+
+        Assert.assertEquals(2, visitor.getTables().size());
+        Assert.assertEquals(3, visitor.getFields().size());
+        Assert.assertEquals(2, visitor.getConditions().size());
+
+        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("employee")));
+        Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("info")));
+
+        Assert.assertTrue(visitor.getFields().contains(new Column("employee", "name")));
+        Assert.assertTrue(visitor.getFields().contains(new Column("info", "name")));
+        Assert.assertTrue(visitor.getFields().contains(new Column("info", "salary")));
+    }
+}
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGDeleteTest5.java b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGDeleteTest5.java
index 1734388cee..46d47c8fce 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGDeleteTest5.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGDeleteTest5.java
@@ -27,6 +27,7 @@ public class PGDeleteTest5 extends PGTest {
 
         System.out.println("Tables : " + visitor.getTables());
         System.out.println("fields : " + visitor.getFields());
+        System.out.println("coditions : " + visitor.getConditions());
 
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("films")));
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("producers")));
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest0.java b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest0.java
index bed33fac79..e99712dc23 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest0.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest0.java
@@ -27,6 +27,7 @@ public class PGInsertTest0 extends PGTest {
 
         System.out.println("Tables : " + visitor.getTables());
         System.out.println("fields : " + visitor.getFields());
+        System.out.println("coditions : " + visitor.getConditions());
 
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("films")));
 
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest1.java b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest1.java
index 805a594863..78efe5323f 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest1.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest1.java
@@ -27,6 +27,7 @@ public class PGInsertTest1 extends PGTest {
 
         System.out.println("Tables : " + visitor.getTables());
         System.out.println("fields : " + visitor.getFields());
+        System.out.println("coditions : " + visitor.getConditions());
 
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("films")));
 
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest3.java b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest3.java
index 45883abd4d..497ff30bfc 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest3.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest3.java
@@ -27,6 +27,7 @@ public class PGInsertTest3 extends PGTest {
 
         System.out.println("Tables : " + visitor.getTables());
         System.out.println("fields : " + visitor.getFields());
+        System.out.println("coditions : " + visitor.getConditions());
 
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("films")));
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("tmp_films")));
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest4.java b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest4.java
index 6ec42097da..b3b4da579e 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest4.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest4.java
@@ -27,6 +27,7 @@ public class PGInsertTest4 extends PGTest {
 
         System.out.println("Tables : " + visitor.getTables());
         System.out.println("fields : " + visitor.getFields());
+        System.out.println("coditions : " + visitor.getConditions());
 
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("distributors")));
 
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest5.java b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest5.java
index 911aa17f62..8573628669 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest5.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGInsertTest5.java
@@ -32,6 +32,7 @@ public class PGInsertTest5 extends PGTest {
 
         System.out.println("Tables : " + visitor.getTables());
         System.out.println("fields : " + visitor.getFields());
+        System.out.println("coditions : " + visitor.getConditions());
 
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("employees_log")));
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("employees")));
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGSelectIntoTest.java b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGSelectIntoTest.java
index fc7817122c..ca75e61c51 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGSelectIntoTest.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGSelectIntoTest.java
@@ -27,6 +27,7 @@ public class PGSelectIntoTest extends PGTest {
         
         System.out.println("Tables : " + visitor.getTables());
         System.out.println("fields : " + visitor.getFields());
+        System.out.println("coditions : " + visitor.getConditions());
         
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("films_recent")));
         Assert.assertTrue(visitor.getTables().containsKey(new TableStat.Name("films")));
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PostgresqlResourceTest.java b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PostgresqlResourceTest.java
index 6c540323f8..bdd427d23f 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PostgresqlResourceTest.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/postgresql/PostgresqlResourceTest.java
@@ -49,6 +49,7 @@ public class PostgresqlResourceTest extends PGTest {
         System.out.println(sql);
         System.out.println("Tables : " + visitor.getTables());
         System.out.println("fields : " + visitor.getFields());
+        System.out.println("coditions : " + visitor.getConditions());
 
         System.out.println();
         System.out.println();