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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
/*
* Content before git sha 34fdeebefcbf183ed7f916f931aa0586fdaa1b40
* Copyright (c) 2016, The Gocql authors,
* provided under the BSD-3-Clause License.
* See the NOTICE file distributed with this work for additional information.
*/
package gocql_test
import (
"context"
"fmt"
"log"
gocql "github.com/gocql/gocql"
)
// Example_batch demonstrates how to execute a batch of statements.
func Example_batch() {
/* The example assumes the following CQL was used to setup the keyspace:
create keyspace example with replication = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 };
create table example.batches(pk int, ck int, description text, PRIMARY KEY(pk, ck));
*/
cluster := gocql.NewCluster("localhost:9042")
cluster.Keyspace = "example"
cluster.ProtoVersion = 4
session, err := cluster.CreateSession()
if err != nil {
log.Fatal(err)
}
defer session.Close()
ctx := context.Background()
b := session.NewBatch(gocql.UnloggedBatch).WithContext(ctx)
b.Entries = append(b.Entries, gocql.BatchEntry{
Stmt: "INSERT INTO example.batches (pk, ck, description) VALUES (?, ?, ?)",
Args: []interface{}{1, 2, "1.2"},
Idempotent: true,
})
b.Entries = append(b.Entries, gocql.BatchEntry{
Stmt: "INSERT INTO example.batches (pk, ck, description) VALUES (?, ?, ?)",
Args: []interface{}{1, 3, "1.3"},
Idempotent: true,
})
err = session.ExecuteBatch(b)
if err != nil {
log.Fatal(err)
}
scanner := session.Query("SELECT pk, ck, description FROM example.batches").Iter().Scanner()
for scanner.Next() {
var pk, ck int32
var description string
err = scanner.Scan(&pk, &ck, &description)
if err != nil {
log.Fatal(err)
}
fmt.Println(pk, ck, description)
}
// 1 2 1.2
// 1 3 1.3
}
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