ipbl/vendor/xorm.io/xorm/internal/statements/delete.go
Paul Lecuq 945b53f28c
All checks were successful
continuous-integration/drone/push Build is passing
updated dependencies (#1)
Reviewed-on: #1
2023-09-10 20:41:55 +02:00

126 lines
3.4 KiB
Go

// Copyright 2023 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package statements
import (
"errors"
"fmt"
"time"
"xorm.io/builder"
"xorm.io/xorm/internal/utils"
"xorm.io/xorm/schemas"
)
func (statement *Statement) writeDeleteOrder(w *builder.BytesWriter) error {
if err := statement.writeOrderBys(w); err != nil {
return err
}
if statement.LimitN != nil && *statement.LimitN > 0 {
if statement.Start > 0 {
return fmt.Errorf("Delete with Limit start is unsupported")
}
limitNValue := *statement.LimitN
if _, err := fmt.Fprintf(w, " LIMIT %d", limitNValue); err != nil {
return err
}
}
return nil
}
// ErrNotImplemented not implemented
var ErrNotImplemented = errors.New("Not implemented")
func (statement *Statement) writeOrderCond(orderCondWriter *builder.BytesWriter, tableName string) error {
orderSQLWriter := builder.NewWriter()
if err := statement.writeDeleteOrder(orderSQLWriter); err != nil {
return err
}
if orderSQLWriter.Len() == 0 {
return nil
}
switch statement.dialect.URI().DBType {
case schemas.POSTGRES:
if statement.cond.IsValid() {
if _, err := fmt.Fprint(orderCondWriter, " AND "); err != nil {
return err
}
} else {
if _, err := fmt.Fprint(orderCondWriter, " WHERE "); err != nil {
return err
}
}
if _, err := fmt.Fprintf(orderCondWriter, "ctid IN (SELECT ctid FROM %s%s)", tableName, orderSQLWriter.String()); err != nil {
return err
}
orderCondWriter.Append(orderSQLWriter.Args()...)
return nil
case schemas.SQLITE:
if statement.cond.IsValid() {
if _, err := fmt.Fprint(orderCondWriter, " AND "); err != nil {
return err
}
} else {
if _, err := fmt.Fprint(orderCondWriter, " WHERE "); err != nil {
return err
}
}
if _, err := fmt.Fprintf(orderCondWriter, "rowid IN (SELECT rowid FROM %s%s)", tableName, orderSQLWriter.String()); err != nil {
return err
}
orderCondWriter.Append(orderSQLWriter.Args()...)
return nil
// TODO: how to handle delete limit on mssql?
case schemas.MSSQL:
return ErrNotImplemented
default:
return utils.WriteBuilder(orderCondWriter, orderSQLWriter)
}
}
func (statement *Statement) WriteDelete(realSQLWriter, deleteSQLWriter *builder.BytesWriter, nowTime func(*schemas.Column) (interface{}, time.Time, error)) error {
tableNameNoQuote := statement.TableName()
tableName := statement.dialect.Quoter().Quote(tableNameNoQuote)
table := statement.RefTable
if _, err := fmt.Fprint(deleteSQLWriter, "DELETE FROM ", tableName); err != nil {
return err
}
if err := statement.writeWhere(deleteSQLWriter); err != nil {
return err
}
orderCondWriter := builder.NewWriter()
if err := statement.writeOrderCond(orderCondWriter, tableName); err != nil {
return err
}
if statement.GetUnscoped() || table == nil || table.DeletedColumn() == nil { // tag "deleted" is disabled
return utils.WriteBuilder(realSQLWriter, deleteSQLWriter, orderCondWriter)
}
deletedColumn := table.DeletedColumn()
if _, err := fmt.Fprintf(realSQLWriter, "UPDATE %v SET %v = ?",
statement.dialect.Quoter().Quote(statement.TableName()),
statement.dialect.Quoter().Quote(deletedColumn.Name)); err != nil {
return err
}
val, _, err := nowTime(deletedColumn)
if err != nil {
return err
}
realSQLWriter.Append(val)
if err := statement.writeWhere(realSQLWriter); err != nil {
return err
}
return utils.WriteBuilder(realSQLWriter, orderCondWriter)
}