92 lines
2.4 KiB
Go
92 lines
2.4 KiB
Go
|
// +build go1.8
|
||
|
|
|
||
|
|
package mssql
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"database/sql"
|
||
|
|
"database/sql/driver"
|
||
|
|
"errors"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
var _ driver.Pinger = &Conn{}
|
||
|
|
|
||
|
|
// Ping is used to check if the remote server is available and satisfies the Pinger interface.
|
||
|
|
func (c *Conn) Ping(ctx context.Context) error {
|
||
|
|
if !c.connectionGood {
|
||
|
|
return driver.ErrBadConn
|
||
|
|
}
|
||
|
|
stmt := &Stmt{c, `select 1;`, 0, nil}
|
||
|
|
_, err := stmt.ExecContext(ctx, nil)
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
var _ driver.ConnBeginTx = &Conn{}
|
||
|
|
|
||
|
|
// BeginTx satisfies ConnBeginTx.
|
||
|
|
func (c *Conn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
|
||
|
|
if !c.connectionGood {
|
||
|
|
return nil, driver.ErrBadConn
|
||
|
|
}
|
||
|
|
if opts.ReadOnly {
|
||
|
|
return nil, errors.New("Read-only transactions are not supported")
|
||
|
|
}
|
||
|
|
|
||
|
|
var tdsIsolation isoLevel
|
||
|
|
switch sql.IsolationLevel(opts.Isolation) {
|
||
|
|
case sql.LevelDefault:
|
||
|
|
tdsIsolation = isolationUseCurrent
|
||
|
|
case sql.LevelReadUncommitted:
|
||
|
|
tdsIsolation = isolationReadUncommited
|
||
|
|
case sql.LevelReadCommitted:
|
||
|
|
tdsIsolation = isolationReadCommited
|
||
|
|
case sql.LevelWriteCommitted:
|
||
|
|
return nil, errors.New("LevelWriteCommitted isolation level is not supported")
|
||
|
|
case sql.LevelRepeatableRead:
|
||
|
|
tdsIsolation = isolationRepeatableRead
|
||
|
|
case sql.LevelSnapshot:
|
||
|
|
tdsIsolation = isolationSnapshot
|
||
|
|
case sql.LevelSerializable:
|
||
|
|
tdsIsolation = isolationSerializable
|
||
|
|
case sql.LevelLinearizable:
|
||
|
|
return nil, errors.New("LevelLinearizable isolation level is not supported")
|
||
|
|
default:
|
||
|
|
return nil, errors.New("Isolation level is not supported or unknown")
|
||
|
|
}
|
||
|
|
return c.begin(ctx, tdsIsolation)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *Conn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
|
||
|
|
if !c.connectionGood {
|
||
|
|
return nil, driver.ErrBadConn
|
||
|
|
}
|
||
|
|
if len(query) > 10 && strings.EqualFold(query[:10], "INSERTBULK") {
|
||
|
|
return c.prepareCopyIn(query)
|
||
|
|
}
|
||
|
|
|
||
|
|
return c.prepareContext(ctx, query)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *Stmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
|
||
|
|
if !s.c.connectionGood {
|
||
|
|
return nil, driver.ErrBadConn
|
||
|
|
}
|
||
|
|
list := make([]namedValue, len(args))
|
||
|
|
for i, nv := range args {
|
||
|
|
list[i] = namedValue(nv)
|
||
|
|
}
|
||
|
|
return s.queryContext(ctx, list)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *Stmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
|
||
|
|
if !s.c.connectionGood {
|
||
|
|
return nil, driver.ErrBadConn
|
||
|
|
}
|
||
|
|
list := make([]namedValue, len(args))
|
||
|
|
for i, nv := range args {
|
||
|
|
list[i] = namedValue(nv)
|
||
|
|
}
|
||
|
|
return s.exec(ctx, list)
|
||
|
|
}
|