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for.go
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for.go
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package clause
import (
"errors"
"fmt"
"io"
"github.com/stephenafamo/bob"
)
var ErrNoLockStrength = errors.New("No lock strength specified")
const (
LockStrengthUpdate = "UPDATE"
LockStrengthNoKeyUpdate = "NO KEY UPDATE"
LockStrengthShare = "SHARE"
LockStrengthKeyShare = "KEY SHARE"
)
const (
LockWaitNoWait = "NOWAIT"
LockWaitSkipLocked = "SKIP LOCKED"
)
type For struct {
Strength string
Tables []string
Wait string
}
func (f *For) SetFor(lock For) {
*f = lock
}
func (f For) WriteSQL(w io.Writer, d bob.Dialect, start int) ([]any, error) {
if f.Strength == "" {
return nil, nil
}
w.Write([]byte("FOR "))
if f.Strength != "" {
fmt.Fprintf(w, "%s ", f.Strength)
}
args, err := bob.ExpressSlice(w, d, start, f.Tables, "OF ", ", ", "")
if err != nil {
return nil, err
}
if f.Wait != "" {
w.Write([]byte(" "))
w.Write([]byte(f.Wait))
}
return args, nil
}