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big_int.go
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big_int.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"
"math/big"
)
func ReadWriteBigInt() error {
conn, err := GetNativeConnection(nil, nil, nil)
if err != nil {
return err
}
ctx := context.Background()
conn.Exec(ctx, "DROP TABLE IF EXISTS example")
if err = conn.Exec(ctx, `
CREATE TABLE example (
Col1 Int128,
Col2 UInt128,
Col3 Array(Int128),
Col4 Int256,
Col5 Array(Int256),
Col6 UInt256,
Col7 Array(UInt256)
) Engine Memory`); err != nil {
return err
}
batch, err := conn.PrepareBatch(ctx, "INSERT INTO example")
if err != nil {
return err
}
col1Data, _ := new(big.Int).SetString("170141183460469231731687303715884105727", 10)
col2Data := big.NewInt(128)
col3Data := []*big.Int{
big.NewInt(-128),
big.NewInt(128128),
big.NewInt(128128128),
}
col4Data := big.NewInt(256)
col5Data := []*big.Int{
big.NewInt(256),
big.NewInt(256256),
big.NewInt(256256256256),
}
col6Data := big.NewInt(256)
col7Data := []*big.Int{
big.NewInt(256),
big.NewInt(256256),
big.NewInt(256256256256),
}
if err = batch.Append(col1Data, col2Data, col3Data, col4Data, col5Data, col6Data, col7Data); err != nil {
return err
}
if err = batch.Send(); err != nil {
return err
}
var (
col1 big.Int
col2 big.Int
col3 []*big.Int
col4 big.Int
col5 []*big.Int
col6 big.Int
col7 []*big.Int
)
if err = conn.QueryRow(ctx, "SELECT * FROM example").Scan(&col1, &col2, &col3, &col4, &col5, &col6, &col7); err != nil {
return err
}
fmt.Printf("col1=%v, col2=%v, col3=%v, col4=%v, col5=%v, col6=%v, col7=%v\n", col1, col2, col3, col4, col5, col6, col7)
return nil
}