2022-07-01 10:57:40 +00:00
// (c) Copyright Ascensio System SIA 2010-2022
//
// This program is a free software product.
// You can redistribute it and/or modify it under the terms
// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
// any third-party rights.
//
// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
//
// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
//
// The interactive user interfaces in modified source and object code versions of the Program must
// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
//
// Pursuant to Section 7(b) of the License you must retain the original Product logo when
// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
// trademark law for use of our trademarks.
//
// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
namespace ASC.Core.Common.EF ;
public class CustomMySqlMigrationsSqlGenerator : MySqlMigrationsSqlGenerator
{
public CustomMySqlMigrationsSqlGenerator (
MigrationsSqlGeneratorDependencies dependencies ,
2022-08-01 10:41:33 +00:00
IRelationalAnnotationProvider migrationsAnnotations ,
#pragma warning disable EF1001 // Internal EF Core API usage.
IMySqlOptions mySqlOptions )
#pragma warning restore EF1001 // Internal EF Core API usage.
2022-07-01 10:57:40 +00:00
: base ( dependencies , migrationsAnnotations , mySqlOptions )
{
}
public override IReadOnlyList < MigrationCommand > Generate ( IReadOnlyList < MigrationOperation > operations , IModel model = null , MigrationsSqlGenerationOptions options = MigrationsSqlGenerationOptions . Default )
{
NotNull ( operations , "operations" ) ;
Options = options ;
var migrationCommandListBuilder = new CustomMigrationCommandListBuilder ( Dependencies ) ;
try
{
foreach ( var operation in operations )
{
Generate ( operation , model , migrationCommandListBuilder ) ;
}
}
finally
{
Options = MigrationsSqlGenerationOptions . Default ;
}
2022-07-08 11:24:18 +00:00
var test = migrationCommandListBuilder . GetCommandList ( ) ;
2022-07-01 10:57:40 +00:00
return migrationCommandListBuilder . GetCommandList ( ) ;
}
private void NotNull ( IReadOnlyList < MigrationOperation > value , string parameterName )
{
if ( value is null )
{
throw new ArgumentNullException ( parameterName ) ;
}
}
}
public class CustomMigrationCommandListBuilder : MigrationCommandListBuilder
{
private string _operationContainer ;
private bool _isIndexOperation ;
public CustomMigrationCommandListBuilder ( MigrationsSqlGeneratorDependencies dependencies )
: base ( dependencies ) { }
public override MigrationCommandListBuilder Append ( string o )
{
if ( o . StartsWith ( "INSERT INTO " ) )
{
o = o . Replace ( "INSERT INTO " , "INSERT IGNORE INTO " ) ;
}
else if ( o . StartsWith ( "CREATE TABLE " ) )
{
o = o . Replace ( "CREATE TABLE " , "CREATE TABLE IF NOT EXISTS " ) ;
}
else if ( o = = "CREATE " )
{
_isIndexOperation = true ;
}
if ( _isIndexOperation = = true )
{
_operationContainer + = o ;
}
else
{
base . Append ( o ) ;
}
return this ;
}
public override MigrationCommandListBuilder AppendLine ( string value )
{
if ( _isIndexOperation = = true )
{
AppendIndexOpeartion ( _operationContainer ) ;
_operationContainer = "" ;
_isIndexOperation = false ;
}
return base . AppendLine ( value ) ;
}
private void AppendIndexOpeartion ( string indexOperation )
{
const string startOpearation = "CREATE " ;
const string startUnique = "UNIQUE " ;
const string startIndexName = "INDEX `" ;
const string startTableName = "` ON `" ;
const string StartColumnsName = "` (`" ;
const string endColumnsName = "`)" ;
var separatingStrings = new [ ] { startOpearation , startUnique , startIndexName , startTableName , StartColumnsName , endColumnsName } ;
var separatedOpearion = indexOperation . Split ( separatingStrings , StringSplitOptions . RemoveEmptyEntries ) ;
2022-07-08 11:24:18 +00:00
var indexName = separatedOpearion [ 0 ] ;
var tableName = separatedOpearion [ 1 ] ;
2022-07-01 10:57:40 +00:00
var createIndexForMySQL =
$"set @x := (select count(*) from information_schema.statistics where table_name = '{tableName}' and index_name = '{indexName}' and table_schema = database()); " +
$"set @sql := if (@x > 0, 'select ''Index exists.''', '{indexOperation};'); " +
$"PREPARE stmt FROM @sql; " +
2022-07-08 11:24:18 +00:00
$"EXECUTE stmt" ;
2022-07-01 10:57:40 +00:00
switch ( Dependencies . CurrentContext . Context . Database . ProviderName )
{
case "Npgsql.EntityFrameworkCore.PostgreSQL" :
base . Append ( createIndexForMySQL ) ;
break ;
case "Microsoft.EntityFrameworkCore.SqlServer" :
base . Append ( createIndexForMySQL ) ;
break ;
case "Microsoft.EntityFrameworkCore.MySql" :
base . Append ( createIndexForMySQL ) ;
break ;
default :
base . Append ( createIndexForMySQL ) ;
break ;
}
}
}