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package mssql
import (
"context"
"database/sql/driver"
"encoding/json"
"errors"
)
type copyin struct {
cn *Conn
bulkcopy *Bulk
closed bool
}
type serializableBulkConfig struct {
TableName string
ColumnsName []string
Options BulkOptions
}
func (d *Driver) OpenConnection(dsn string) (*Conn, error) {
return d.open(context.Background(), dsn)
}
func (c *Conn) prepareCopyIn(query string) (_ driver.Stmt, err error) {
config_json := query[11:]
bulkconfig := serializableBulkConfig{}
err = json.Unmarshal([]byte(config_json), &bulkconfig)
if err != nil {
return
}
bulkcopy := c.CreateBulk(bulkconfig.TableName, bulkconfig.ColumnsName)
bulkcopy.Options = bulkconfig.Options
ci := ©in{
cn: c,
bulkcopy: bulkcopy,
}
return ci, nil
}
func CopyIn(table string, options BulkOptions, columns ...string) string {
bulkconfig := &serializableBulkConfig{TableName: table, Options: options, ColumnsName: columns}
config_json, err := json.Marshal(bulkconfig)
if err != nil {
panic(err)
}
stmt := "INSERTBULK " + string(config_json)
return stmt
}
func (ci *copyin) NumInput() int {
return -1
}
func (ci *copyin) Query(v []driver.Value) (r driver.Rows, err error) {
return nil, errors.New("ErrNotSupported")
}
func (ci *copyin) Exec(v []driver.Value) (r driver.Result, err error) {
if ci.closed {
return nil, errors.New("errCopyInClosed")
}
if len(v) == 0 {
rowCount, err := ci.bulkcopy.Done()
ci.closed = true
return driver.RowsAffected(rowCount), err
}
t := make([]interface{}, len(v))
for i, val := range v {
t[i] = val
}
err = ci.bulkcopy.AddRow(t)
if err != nil {
return
}
return driver.RowsAffected(0), nil
}
func (ci *copyin) Close() (err error) {
return nil
}
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