bug fixed for sql parser SchemaStatVisitor. for issue #1798

src/test/java/com/alibaba/druid/bvt/sql/mysql/visitor/MySqlSchemaStatVisitorTest7.java

@@ -0,0 +1,59 @@
+/*
+ * 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.mysql.visitor;
+
+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 junit.framework.TestCase;
+import org.junit.Assert;
+
+import java.util.List;
+
+public class MySqlSchemaStatVisitorTest7 extends TestCase {
+
+	public void test_0() throws Exception {
+		String sql = "select * from t1 where b in (select b from t2) and a = 1";
+
+//		sql = "select columnName from table1 where id in (select id from table3 where name = ?)";
+		MySqlStatementParser parser = new MySqlStatementParser(sql);
+		List<SQLStatement> statementList = parser.parseStatementList();
+		SQLStatement stmt = statementList.get(0);
+
+		assertEquals(1, statementList.size());
+
+		MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+		stmt.accept(visitor);
+
+		System.out.println(sql);
+		System.out.println("Tables : " + visitor.getTables());
+		System.out.println("fields : " + visitor.getColumns());
+		System.out.println(visitor.getConditions());
+
+		assertEquals(2, visitor.getTables().size());
+		assertEquals(true, visitor.containsTable("t1"));
+		assertEquals(true, visitor.containsTable("t2"));
+
+		assertEquals(4, visitor.getColumns().size());
+		assertEquals(true, visitor.containsColumn("t1", "b"));
+		assertEquals(true, visitor.containsColumn("t2", "b"));
+		assertEquals(true, visitor.containsColumn("t1", "a"));
+		// assertEquals(true, visitor.getFields().contains(new
+		// Column("users", "name")));
+
+	}
+
+}