forked from ClickHouse/clickhouse-go
/
compression.go
69 lines (66 loc) · 1.9 KB
/
compression.go
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// Licensed to ClickHouse, Inc. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. ClickHouse, Inc. 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.
package clickhouse_api
import (
"context"
"fmt"
"github.com/ClickHouse/clickhouse-go/v2"
"strconv"
)
func Compress() error {
env, err := GetNativeTestEnvironment()
if err != nil {
return err
}
conn, err := clickhouse.Open(&clickhouse.Options{
Addr: []string{fmt.Sprintf("%s:%d", env.Host, env.Port)},
Auth: clickhouse.Auth{
Database: env.Database,
Username: env.Username,
Password: env.Password,
},
Compression: &clickhouse.Compression{
Method: clickhouse.CompressionZSTD,
},
MaxOpenConns: 1,
})
ctx := context.Background()
defer func() {
conn.Exec(ctx, "DROP TABLE example")
}()
conn.Exec(context.Background(), "DROP TABLE IF EXISTS example")
if err = conn.Exec(ctx, `
CREATE TABLE example (
Col1 Array(String)
) Engine Memory
`); err != nil {
return err
}
batch, err := conn.PrepareBatch(ctx, "INSERT INTO example")
if err != nil {
return err
}
for i := 0; i < 1000; i++ {
if err := batch.Append([]string{strconv.Itoa(i), strconv.Itoa(i + 1), strconv.Itoa(i + 2), strconv.Itoa(i + 3)}); err != nil {
return err
}
}
if err := batch.Send(); err != nil {
return err
}
return nil
}