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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit Sql.Database.Physical.Mysql;
interface
uses
Boolean,
Character.Encoding,
Integer,
Sql.Connection.Settings,
Sql.Database,
Sql.Database.Physical.Default,
Sql.Database.Physical.Mysql.Protocol.Client,
Sql.Database.PreparedStatement,
Sql.Result,
Sql.Statement,
Sql.Variable,
Text;
type
TMysql = class(TDefaultPhysicalSqlDatabase)
protected
Encoding: TCharacterEncoding;
Client: TMysqlProtocolClient;
function GetCouldConnect(): TBoolean; override;
procedure ExecuteStartTransaction(); override;
procedure ExecuteCommitTransaction(); override;
procedure ExecuteRollbackTransaction(); override;
function CompileStatement(Statement: TSqlStatement): TText;
function HandleLoadLocalDataInfile(Statement: TSqlStatement): TBoolean;
public
const
DEFAULT_PORT = 3306;
constructor Create(ConnectionSettings: TSqlConnectionSettings); override;
destructor Destroy(); override;
function NumberOfAffectedRows(): TInteger; override;
function ConnectionIdentifier(): TInteger; override;
function InsertId(): TInteger; override;
function IsAlive(): TBoolean; override;
function Query(Statement: TSqlStatement; ResultMethod: TSqlQueryResultMethod = sqrmStoreResult): TSqlResult; override;
function Prepare(Statement: TSqlStatement): TSqlPreparedStatement; override;
function Embellish(): TSqlDatabase; override;
function UserExists(const Name: TText): TBoolean; override;
function GetSystemInformation(): TObject; override;
public
class var
UniqueChecks: TSqlVariable;
ForeignKeyChecks: TSqlVariable;
class constructor Create();
class destructor Destroy();
end;
implementation
uses
Exception,
Internet.Address,
Log,
Socket.Address.Internet,
Sql,
Sql.Database.Logical.Hierarchical,
Sql.Database.Logical.Optimizing,
Sql.Database.Logical.PrepareBlob,
Sql.Database.Logical.Versioned,
Sql.Database.Physical.Mysql.Compiler,
Sql.Database.Physical.Mysql.Schema.System,
Sql.Database.Physical.Mysql.SystemInformation,
Sql.Result.RecordSet,
Sql.Statement.DataManipulation,
Type_.Structured.Value,
Windows.Api.Kernel.DateTime;
{ TMysql }
function TMysql.CompileStatement(Statement: TSqlStatement): TText;
var
Compiler: TMysqlCompiler;
begin
Statement.AddReference();
try
Compiler := TMysqlCompiler.Create();
Result := Compiler.Compile(Encoding, Statement);
Compiler.Free();
finally
Statement.ReleaseReference();
end;
end;
function TMysql.ConnectionIdentifier(): TInteger;
begin
Result := Client.ConnectionId;
end;
class constructor TMysql.Create();
begin
UniqueChecks := TSqlVariable.Create(TSqlVariableType.System, 'unique_checks');
ForeignKeyChecks := TSqlVariable.Create(TSqlVariableType.System, 'foreign_key_checks');
end;
constructor TMysql.Create(ConnectionSettings: TSqlConnectionSettings);
begin
inherited Create(ConnectionSettings);
Encoding := TCharacterEncoding.Utf8;
if ConnectionSettings.Port = 0 then
ConnectionSettings.Port := DEFAULT_PORT;
if ConnectionSettings.DatabaseName.Count > 0 then
try
Client := TMysqlProtocolClient.Create(
TInternetSocketAddress.Create(TInternetAddress.FromText(ConnectionSettings.Server), ConnectionSettings.Port),
Encoding,
ConnectionSettings.UserName,
ConnectionSettings.Password,
ConnectionSettings.DatabaseName
);
except
on Exception: EException do
TLog.Get(['Sql', 'Database', 'Physical', 'MySQL']).AppendException(Exception);
end;
if CouldConnect then
begin
Client.Query('SET SESSION sql_mode=''STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION''');
Client.Query('SET SESSION character_set_server=utf8');
Client.Query('SET SESSION collation_server=utf8_unicode_ci');
Client.Query('SET SESSION collation_connection=utf8_unicode_ci');
end;
end;
destructor TMysql.Destroy();
begin
Client.Free();
inherited Destroy();
end;
function TMysql.Embellish(): TSqlDatabase;
begin
Result := inherited Embellish();
Result := TOptimizingSqlDatabase.Create(
THierarchicalSqlDatabase.Create(
TVersionedSqlDatabase.Create(
TPrepareBlobSqlDatabase.Create(Result, True),
True
),
True
),
True
);
end;
procedure TMysql.ExecuteCommitTransaction();
begin
Client.Query('COMMIT');
end;
procedure TMysql.ExecuteRollbackTransaction();
begin
Client.Query('ROLLBACK');
end;
procedure TMysql.ExecuteStartTransaction();
begin
Client.Query('START TRANSACTION');
end;
function TMysql.GetCouldConnect(): TBoolean;
begin
Result := Client <> nil;
end;
function TMysql.GetSystemInformation(): TObject;
begin
Result := TMysqlSystemInformation.Instance;
end;
function TMysql.HandleLoadLocalDataInfile(Statement: TSqlStatement): TBoolean;
var
LoadDataInfile: TSqlLoadDataInfile;
begin
Result := False;
if Statement is TSqlLoadDataInfile then
begin
LoadDataInfile := Statement as TSqlLoadDataInfile;
if LoadDataInfile.Data <> nil then
begin
Result := True;
Client.LoadLocalDataInfile(CompileStatement(Statement), LoadDataInfile.Data)
end;
end;
end;
function TMysql.InsertId(): TInteger;
begin
Result := Client.LastInsertId;
end;
function TMysql.IsAlive(): TBoolean;
begin
Result := Client.Ping();
end;
function TMysql.NumberOfAffectedRows(): TInteger;
begin
Result := Client.NumberOfEffectedRows;
end;
function TMysql.Prepare(Statement: TSqlStatement): TSqlPreparedStatement;
begin
Result := Client.Prepare(CompileStatement(Statement));
end;
function TMysql.Query(Statement: TSqlStatement; ResultMethod: TSqlQueryResultMethod): TSqlResult;
var
Records: TRecordSet;
begin
Result := nil;
if not HandleLoadLocalDataInfile(Statement) then
begin
Records := Client.Query(CompileStatement(Statement));
if Records <> nil then
Result := TRecordSetSqlResult.Create(Records, Encoding);
end;
TickCountLastQuery := GetTickCount();
end;
function TMysql.UserExists(const Name: TText): TBoolean;
var
UserTable: TMysqlUserTable;
begin
UserTable := TMysqlSystemSchema.Instance.UserTable;
Result := Exists(Select([ UserTable.User ], [ UserTable ], [ UserTable.User = Name ]));
end;
class destructor TMysql.Destroy();
begin
UniqueChecks.Free();
ForeignKeyChecks.Free();
end;
end.
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