bug fixed for pg sql parser 'with update', for issue #1727

src/main/java/com/alibaba/druid/sql/dialect/postgresql/parser/PGSQLStatementParser.java

@@ -322,6 +322,12 @@ public class PGSQLStatementParser extends SQLStatementParser {
             stmt.setWith(with);
             return stmt;
         }
+
+        if (lexer.token() == Token.UPDATE) {
+            PGUpdateStatement stmt = (PGUpdateStatement) this.parseUpdateStatement();
+            stmt.setWith(with);
+            return stmt;
+        }
         throw new ParserException("TODO");
     }
 

src/test/java/com/alibaba/druid/bvt/sql/postgresql/select/PGSelectTest49.java

@@ -0,0 +1,74 @@
+/*
+ * 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 PGSelectTest49 extends TestCase {
+    private final String dbType = JdbcConstants.POSTGRESQL;
+
+    public void test_0() throws Exception {
+        String sql = "WITH sel AS (SELECT\n" +
+                "       unnest(ARRAY [4275]) AS gdid,\n" +
+                "       unnest(ARRAY [1])    AS gdnumber)\n" +
+                "UPDATE goods_detail\n" +
+                "SET gd_number = gd_number - gdnumber FROM sel\n" +
+                "WHERE gd_id = gdid;";
+
+        List<SQLStatement> stmtList = SQLUtils.parseStatements(sql, dbType);
+        SQLStatement stmt = stmtList.get(0);
+
+        assertEquals("WITH\n" +
+                "\tsel\n" +
+                "\tAS\n" +
+                "\t(\n" +
+                "\t\tSELECT unnest(ARRAY[4275]) AS gdid, unnest(ARRAY[1]) AS gdnumber\n" +
+                "\t)\n" +
+                "UPDATE goods_detail\n" +
+                "SET gd_number = gd_number - gdnumber\n" +
+                "FROM sel\n" +
+                "WHERE gd_id = gdid", SQLUtils.toPGString(stmt));
+        
+        assertEquals("with\n" +
+                "\tsel\n" +
+                "\tas\n" +
+                "\t(\n" +
+                "\t\tselect unnest(ARRAY[4275]) as gdid, unnest(ARRAY[1]) as gdnumber\n" +
+                "\t)\n" +
+                "update goods_detail\n" +
+                "set gd_number = gd_number - gdnumber\n" +
+                "from sel\n" +
+                "where gd_id = gdid", 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(4, visitor.getColumns().size());
+        assertEquals(1, visitor.getTables().size());
+    }
+}