improved postgresql parser. for issue #1841

src/test/java/com/alibaba/druid/bvt/sql/postgresql/select/PGSelectTest54.java

@@ -0,0 +1,61 @@
+/*
+ * 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.postgresql.select;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
+import com.alibaba.druid.util.JdbcConstants;
+import junit.framework.TestCase;
+
+import java.util.List;
+
+public class PGSelectTest54 extends TestCase {
+    private final String dbType = JdbcConstants.POSTGRESQL;
+
+    public void test_0() throws Exception {
+        String sql = "select gid, kind, mapid, poi_id, telephone, admincode, x, y, zipcode, name, address, street, number,geom from public.v_poi order by public.v_poi.geom <-> st_point(?,?) limit 1";
+
+        List<SQLStatement> stmtList = SQLUtils.parseStatements(sql, dbType);
+        SQLStatement stmt = stmtList.get(0);
+
+        assertEquals("SELECT gid, kind, mapid, poi_id, telephone\n" +
+                "\t, admincode, x, y, zipcode, name\n" +
+                "\t, address, street, number, geom\n" +
+                "FROM public.v_poi\n" +
+                "ORDER BY public.v_poi.geom <-> st_point(?, ?)\n" +
+                "LIMIT 1", SQLUtils.toPGString(stmt));
+        
+        assertEquals("select gid, kind, mapid, poi_id, telephone\n" +
+                "\t, admincode, x, y, zipcode, name\n" +
+                "\t, address, street, number, geom\n" +
+                "from public.v_poi\n" +
+                "order by public.v_poi.geom <-> st_point(?, ?)\n" +
+                "limit 1", SQLUtils.toPGString(stmt, SQLUtils.DEFAULT_LCASE_FORMAT_OPTION));
+
+        assertEquals(1, stmtList.size());
+
+        SchemaStatVisitor visitor = SQLUtils.createSchemaStatVisitor(dbType);
+        stmt.accept(visitor);
+
+//        System.out.println("Tables : " + visitor.getTables());
+//        System.out.println("fields : " + visitor.getColumns());
+//        System.out.println("coditions : " + visitor.getConditions());
+
+        assertEquals(14, visitor.getColumns().size());
+        assertEquals(1, visitor.getTables().size());
+    }
+}