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array.go
79 lines (75 loc) · 1.98 KB
/
array.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"
"strconv"
)
func ArrayInsertRead() error {
conn, err := GetNativeConnection(nil, nil, nil)
if err != nil {
return err
}
ctx := context.Background()
defer func() {
conn.Exec(ctx, "DROP TABLE example")
}()
conn.Exec(context.Background(), "DROP TABLE IF EXISTS example")
err = conn.Exec(ctx, `
CREATE TABLE IF NOT EXISTS example (
Col1 Array(String)
, Col2 Array(Array(Int64))
) Engine = Memory
`)
if err != nil {
return err
}
batch, err := conn.PrepareBatch(ctx, "INSERT INTO example")
if err != nil {
return err
}
var i int64
for i = 0; i < 10; i++ {
err := batch.Append(
[]string{strconv.Itoa(int(i)), strconv.Itoa(int(i + 1)), strconv.Itoa(int(i + 2)), strconv.Itoa(int(i + 3))},
[][]int64{{i, i + 1}, {i + 2, i + 3}, {i + 4, i + 5}},
)
if err != nil {
return err
}
}
if err := batch.Send(); err != nil {
return err
}
var (
col1 []string
col2 [][]int64
)
rows, err := conn.Query(ctx, "SELECT * FROM example")
if err != nil {
return err
}
for rows.Next() {
if err := rows.Scan(&col1, &col2); err != nil {
return err
}
fmt.Printf("row: col1=%v, col2=%v\n", col1, col2)
}
rows.Close()
return rows.Err()
}