improved sql parser.

src/test/java/com/alibaba/druid/benckmark/sql/MySqlParameterizedBenchmark.java

@@ -38,7 +38,7 @@ public class MySqlParameterizedBenchmark extends TestCase {
 //            perf_parse(sql3); // 9174 5875 5805 5536 5717
 //            perf_parse(sql4); // 2953 2502
 
-            perf_stat(sql); // 11793 13628 13561 13259 9946 7637 7444 7389
+            perf_stat(sql); // 11793 13628 13561 13259 9946 7637 7444 7389 7326
 
 //            perf_resolve(sql); // 4970 4586 3600
         }

src/test/java/com/alibaba/druid/bvt/sql/oracle/select/OracleSelectTest79.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 1999-2017 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.oracle.select;
+
+import com.alibaba.druid.sql.OracleTest;
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.oracle.parser.OracleStatementParser;
+import com.alibaba.druid.sql.dialect.oracle.visitor.OracleSchemaStatVisitor;
+import org.junit.Assert;
+
+import java.util.List;
+
+public class OracleSelectTest79 extends OracleTest {
+
+    public void test_0() throws Exception {
+        String sql = //
+                "SELECT * FROM `tasks` where projectId=?"; //
+
+        OracleStatementParser parser = new OracleStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement stmt = statementList.get(0);
+        print(statementList);
+
+        Assert.assertEquals(1, statementList.size());
+
+        OracleSchemaStatVisitor visitor = new OracleSchemaStatVisitor();
+        stmt.accept(visitor);
+
+        {
+            String text = SQLUtils.toOracleString(stmt);
+
+            assertEquals("SELECT *\n" +
+                    "FROM `tasks`\n" +
+                    "WHERE projectId = ?", text);
+        }
+
+        System.out.println("Tables : " + visitor.getTables());
+        System.out.println("fields : " + visitor.getColumns());
+        System.out.println("coditions : " + visitor.getConditions());
+        System.out.println("relationships : " + visitor.getRelationships());
+        System.out.println("orderBy : " + visitor.getOrderByColumns());
+
+        assertEquals(1, visitor.getTables().size());
+        assertEquals(2, visitor.getColumns().size());
+        assertEquals(1, visitor.getConditions().size());
+        assertEquals(0, visitor.getRelationships().size());
+        assertEquals(0, visitor.getOrderByColumns().size());
+
+
+        // Assert.assertTrue(visitor.getColumns().contains(new TableStat.Column("acduser.vw_acd_info", "xzqh")));
+
+        // Assert.assertTrue(visitor.getOrderByColumns().contains(new TableStat.Column("employees", "last_name")));
+    }
+}