hunt.database.driver.postgresql.impl.codec.ExtendedBatchQueryCommandCodec source code

1 /*
2  * Copyright (C) 2018 Julien Viet
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 module hunt.database.driver.postgresql.impl.codec.ExtendedBatchQueryCommandCodec;
18 
19 import hunt.database.driver.postgresql.impl.codec.ExtendedQueryCommandBaseCodec;
20 import hunt.database.driver.postgresql.impl.codec.Parse;
21 import hunt.database.driver.postgresql.impl.codec.PgEncoder;
22 import hunt.database.driver.postgresql.impl.codec.PgPreparedStatement;
23 
24 import hunt.database.base.Tuple;
25 import hunt.database.base.impl.command.ExtendedBatchQueryCommand;
26 
27 import hunt.collection.List;
28 import hunt.logging;
29 
30 import std.variant;
31 
32 /**
33 */
34 class ExtendedBatchQueryCommandCodec(R) : ExtendedQueryCommandBaseCodec!(R,
35         ExtendedBatchQueryCommand!(R)) {
36 
37     this(ExtendedBatchQueryCommand!(R) cmd) {
38         super(cmd);
39     }
40 
41     override void encode(PgEncoder encoder) {
42         if (cmd.isSuspended()) {
43             encoder.writeExecute(cmd.cursorId(), cmd.fetch());
44             encoder.writeSync();
45         } else {
46             PgPreparedStatement ps = cast(PgPreparedStatement) cmd.preparedStatement();
47             version(HUNT_DB_DEBUG) tracef("batch sql: %s", ps.sql());
48             if (ps.bind.statement == 0) {
49                 encoder.writeParse(new Parse(ps.sql()));
50             }
51             if (cmd.params().isEmpty()) {
52                 // We set suspended to false as we won't get a command complete command back from Postgres
53                 this.result = false;
54             } else {
55                 foreach (Tuple param; cmd.params()) {
56                     encoder.writeBind(ps.bind, cmd.cursorId(), cast(List!(Variant)) param);
57                     encoder.writeExecute(cmd.cursorId(), cmd.fetch());
58                 }
59             }
60             encoder.writeSync();
61         }
62     }
63 }