bug fixed for postgresql parser

src/test/java/com/alibaba/druid/bvt/bug/Bug_for_xuershan.java

@@ -19,7 +19,7 @@ public class Bug_for_xuershan extends TestCase {
 
     protected void setUp() throws Exception {
         driver = new MockDriver() {
-            protected ResultSet createResultSet(MockPreparedStatement stmt) {
+            public ResultSet createResultSet(MockPreparedStatement stmt) {
                 return null;
             }
         };

src/test/java/com/alibaba/druid/bvt/sql/postgresql/PGSelectForUpdateTest.java

@@ -0,0 +1,41 @@
+package com.alibaba.druid.bvt.sql.postgresql;
+
+import java.util.List;
+
+import junit.framework.Assert;
+
+import com.alibaba.druid.sql.PGTest;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.postgresql.parser.PGSQLStatementParser;
+import com.alibaba.druid.sql.dialect.postgresql.visitor.PGSchemaStatVisitor;
+
+public class PGSelectForUpdateTest extends PGTest {
+
+    public void test_0() throws Exception {
+        String sql = "select pkvalue from dbtpktable where tablename = 'taturvisit' for update";
+
+        PGSQLStatementParser parser = new PGSQLStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement statemen = statementList.get(0);
+        print(statementList);
+
+        Assert.assertEquals(1, statementList.size());
+
+        PGSchemaStatVisitor visitor = new PGSchemaStatVisitor();
+        statemen.accept(visitor);
+
+        System.out.println("Tables : " + visitor.getTables());
+        System.out.println("fields : " + visitor.getColumns());
+        System.out.println("coditions : " + visitor.getConditions());
+
+        Assert.assertEquals(2, visitor.getColumns().size());
+        Assert.assertEquals(1, visitor.getTables().size());
+    }
+
+}
+
+// select categoryId , offerIds from cnres.function_select_get_spt_p4p_offer_list (' 1031918 , 1031919 , 1037004 ') as
+// a(categoryId numeric,offerIds character varying(4000))
+// select memberId , offerIds from cnres.function_select_get_seller_hot_offer_list('\'gzyyd168\'') as a(memberId
+// character varying(20),offerIds character varying(4000))
+