client/3.0/FB30Attachment.pas

(*
 *  Firebird Interface (fbintf). The fbintf components provide a set of
 *  Pascal language bindings for the Firebird API.
 *
 *  The contents of this file are subject to the Initial Developer's
 *  Public License Version 1.0 (the "License"); you may not use this
 *  file except in compliance with the License. You may obtain a copy
 *  of the License here:
 *
 *    http://www.firebirdsql.org/index.php?op=doc&id=idpl
 *
 *  Software distributed under the License is distributed on an "AS
 *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 *  implied. See the License for the specific language governing rights
 *  and limitations under the License.
 *
 *  The Initial Developer of the Original Code is Tony Whyman.
 *
 *  The Original Code is (C) 2016 Tony Whyman, MWA Software
 *  (http://www.mwasoftware.co.uk).
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): ______________________________________.
 *
*)
unit FB30Attachment;
{$IFDEF MSWINDOWS} 
{$DEFINE WINDOWS} 
{$ENDIF}

{$IFDEF FPC}
{$mode delphi}
{$interfaces COM}
{$ENDIF}

interface

uses
  Classes, SysUtils, FBAttachment, FBClientAPI, FB30ClientAPI, Firebird, IB,
  FBActivityMonitor, FBParamBlock;

type

  { TFB30Attachment }

  TFB30Attachment = class(TFBAttachment,IAttachment, IActivityMonitor)
  private
    FAttachmentIntf: Firebird.IAttachment;
    FFirebird30ClientAPI: TFB30ClientAPI;
    FTimeZoneServices: ITimeZoneServices;
    FUsingRemoteICU: boolean;
    FOwnsAttachmentHandle: boolean;
    procedure SetAttachmentIntf(AValue: Firebird.IAttachment);
    procedure SetUseRemoteICU(aValue: boolean);
  protected
    procedure CheckHandle; override;
    function GetAttachment: IAttachment; override;
  public
    constructor Create(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
          RaiseExceptionOnConnectError: boolean); overload;
    constructor Create(api: TFB30ClientAPI;
      attachment: Firebird.IAttachment; aDatabaseName: AnsiString); overload;
    constructor CreateDatabase(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB; RaiseExceptionOnError: boolean);  overload;
    constructor CreateDatabase(api: TFB30ClientAPI; sql: AnsiString; aSQLDialect: integer;
      RaiseExceptionOnError: boolean); overload;
    function GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer): IDBInformation;
      override;
    property AttachmentIntf: Firebird.IAttachment read FAttachmentIntf write SetAttachmentIntf;
    property Firebird30ClientAPI: TFB30ClientAPI read FFirebird30ClientAPI;

  public
    {IAttachment}
    procedure Connect;
    procedure Disconnect(Force: boolean=false); override;
    function IsConnected: boolean; override;
    procedure DropDatabase;
    function StartTransaction(TPB: array of byte; DefaultCompletion: TTransactionCompletion; aName: AnsiString=''): ITransaction; override;
    function StartTransaction(TPB: ITPB; DefaultCompletion: TTransactionCompletion; aName: AnsiString=''): ITransaction; override;
    procedure ExecImmediate(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer); override;
    function Prepare(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer; CursorName: AnsiString=''): IStatement; override;
    function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
                       aSQLDialect: integer; GenerateParamNames: boolean=false;
                       CaseSensitiveParams: boolean=false; CursorName: AnsiString=''): IStatement; override;

    {Events}
    function GetEventHandler(Events: TStrings): IEvents; override;

    {Blob - may use to open existing Blobs. However, ISQLData.AsBlob is preferred}

    function CreateBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BPB: IBPB=nil): IBlob; overload; override;
    function CreateBlob(transaction: ITransaction; SubType: integer; aCharSetID: cardinal=0; BPB: IBPB=nil): IBlob; overload;
    function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob;  overload; override;

    {Array}
    function OpenArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData; ArrayID: TISC_QUAD): IArray; overload; override;
    function CreateArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData): IArray; overload; override;
    function CreateArrayMetaData(SQLType: cardinal; tableName: AnsiString;
      columnName: AnsiString; Scale: integer; size: cardinal; aCharSetID: cardinal;
      dimensions: cardinal; bounds: TArrayBounds): IArrayMetaData;


    {Database Information}
    function GetBlobMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IBlobMetaData; override;
    function GetArrayMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IArrayMetaData; override;
    procedure getFBVersion(version: TStrings);
    function HasDecFloatSupport: boolean; override;
    function HasBatchMode: boolean; override;
    function HasScollableCursors: boolean;

    {Time Zone Support}
    function GetTimeZoneServices: ITimeZoneServices; override;
    function HasTimeZoneSupport: boolean; override;
  end;

implementation

uses FB30Transaction, FB30Statement, FB30Array, FB30Blob, FBMessages,
  FBOutputBlock, FB30Events, IBUtils, FB30TimeZoneServices;

type
  { TVersionCallback }

  TVersionCallback = class(Firebird.IVersionCallbackImpl)
  private
    FOutput: TStrings;
    FFirebirdClientAPI: TFBClientAPI;
  public
    constructor Create(FirebirdClientAPI: TFBClientAPI; output: TStrings);
    procedure callback(status: Firebird.IStatus; text: PAnsiChar); override;
  end;

{ TVersionCallback }

constructor TVersionCallback.Create(FirebirdClientAPI: TFBClientAPI;
  output: TStrings);
begin
  inherited Create;
  FFirebirdClientAPI := FirebirdClientAPI;
  FOutput := output;
end;

procedure TVersionCallback.callback(status: Firebird.IStatus; text: PAnsiChar);
var aStatus: IStatus;
begin
  aStatus := TFB30Status.Create(FFirebirdClientAPI,status);
  if aStatus.InErrorState then
      raise EIBInterBaseError.Create(aStatus);
  FOutput.Add(text);
end;


{ TFB30Attachment }

procedure TFB30Attachment.SetUseRemoteICU(aValue: boolean);
begin
  if (FUsingRemoteICU <> aValue) and (GetODSMajorVersion >= 13) then
  begin
    if aValue then
      ExecImmediate([isc_tpb_write,isc_tpb_wait,isc_tpb_concurrency],'SET BIND OF TIME ZONE TO EXTENDED')
    else
      ExecImmediate([isc_tpb_write,isc_tpb_wait,isc_tpb_concurrency],'SET BIND OF TIME ZONE TO NATIVE');
    FUsingRemoteICU := aValue;
  end;
end;

procedure TFB30Attachment.SetAttachmentIntf(AValue: Firebird.IAttachment);
begin
  if FAttachmentIntf = AValue then Exit;
  if FAttachmentIntf <> nil then
  try
    FAttachmentIntf.release;
  except {ignore - forced release}
  end;
  FOwnsAttachmentHandle := false;
  ClearCachedInfo;
  FTimeZoneServices := nil;
  FAttachmentIntf := AValue;
  if FAttachmentIntf <> nil then
    FAttachmentIntf.AddRef;
end;

procedure TFB30Attachment.CheckHandle;
begin
  if FAttachmentIntf = nil then
    IBError(ibxeDatabaseClosed,[nil]);
end;

function TFB30Attachment.GetAttachment: IAttachment;
begin
  Result := self;
end;

constructor TFB30Attachment.Create(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
  RaiseExceptionOnConnectError: boolean);
begin
  FFirebird30ClientAPI := api;
  if aDPB = nil then
  begin
    if RaiseExceptionOnConnectError then
       IBError(ibxeNoDPB,[nil]);
    Exit;
  end;
  inherited Create(api,DatabaseName,aDPB,RaiseExceptionOnConnectError);
  Connect;
end;

constructor TFB30Attachment.CreateDatabase(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
  RaiseExceptionOnError: boolean);
var Param: IDPBItem;
    sql: AnsiString;
    IsCreateDB: boolean;
    Intf: Firebird.IAttachment;
begin
  inherited Create(api,DatabaseName,aDPB,RaiseExceptionOnError);
  FFirebird30ClientAPI := api;
  IsCreateDB := true;
  if aDPB <> nil then
  begin
    Param := aDPB.Find(isc_dpb_set_db_SQL_dialect);
    if Param <> nil then
      SetSQLDialect(Param.AsByte);
  end;
  sql := GenerateCreateDatabaseSQL(DatabaseName,aDPB);
  with FFirebird30ClientAPI do
  begin
    Intf := UtilIntf.executeCreateDatabase(StatusIntf,Length(sql),
                                       PAnsiChar(sql),SQLDialect,@IsCreateDB);
    if FRaiseExceptionOnConnectError then Check4DataBaseError;
    if not InErrorState then
    begin
      if aDPB <> nil then
      {Connect using known parameters}
      begin
        Intf.Detach(StatusIntf); {releases interface}
        Check4DataBaseError;
        Connect;
      end
      else
        AttachmentIntf := Intf;
      FOwnsAttachmentHandle:= true;
    end;
  end;
end;

constructor TFB30Attachment.CreateDatabase(api: TFB30ClientAPI; sql: AnsiString; aSQLDialect: integer;
  RaiseExceptionOnError: boolean);
var IsCreateDB: boolean;
    Intf: Firebird.IAttachment;
begin
  inherited Create(api,'',nil,RaiseExceptionOnError);
  FFirebird30ClientAPI := api;
  SetSQLDialect(aSQLDialect);
  with FFirebird30ClientAPI do
  begin
    Intf := UtilIntf.executeCreateDatabase(StatusIntf,Length(sql),
                                       PAnsiChar(sql),aSQLDialect,@IsCreateDB);
    if FRaiseExceptionOnConnectError then Check4DataBaseError;
    if InErrorState then
      Exit;
  end;
  AttachmentIntf := Intf;
  FOwnsAttachmentHandle:= true;
  ExtractConnectString(sql,FDatabaseName);
  DPBFromCreateSQL(sql);
end;

constructor TFB30Attachment.Create(api: TFB30ClientAPI;
  attachment: Firebird.IAttachment; aDatabaseName: AnsiString);
begin
  inherited Create(api,aDatabaseName,nil,false);
  FFirebird30ClientAPI := api;
  AttachmentIntf := attachment;
end;

function TFB30Attachment.GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer): IDBInformation;
begin
  Result := TDBInformation.Create(Firebird30ClientAPI);
  with FFirebird30ClientAPI, Result as TDBInformation do
  begin
    FAttachmentIntf.getInfo(StatusIntf, ReqBufLen, BytePtr(ReqBuffer),
                               getBufSize, BytePtr(Buffer));
      Check4DataBaseError;
  end
end;

procedure TFB30Attachment.Connect;
var Intf: Firebird.IAttachment;
begin
  with FFirebird30ClientAPI do
  begin
    Intf := ProviderIntf.attachDatabase(StatusIntf,PAnsiChar(FDatabaseName),
                         (DPB as TDPB).getDataLength,
                         BytePtr((DPB as TDPB).getBuffer));
    if FRaiseExceptionOnConnectError then Check4DataBaseError;
    if not InErrorState then
    begin
      AttachmentIntf := Intf;
      FOwnsAttachmentHandle := true;
    end;
  end;
end;

procedure TFB30Attachment.Disconnect(Force: boolean);
begin
  if IsConnected then
  begin
    EndAllTransactions;
    if FOwnsAttachmentHandle then
    with FFirebird30ClientAPI do
    begin
      FAttachmentIntf.Detach(StatusIntf);
      if not Force and InErrorState then
        IBDataBaseError;
    end;
    AttachmentIntf := nil;
  end;
  inherited Disconnect(Force);
end;

function TFB30Attachment.IsConnected: boolean;
begin
  Result := FAttachmentIntf <> nil;
end;

procedure TFB30Attachment.DropDatabase;
begin
  if IsConnected then
  begin
    if not FOwnsAttachmentHandle then
      IBError(ibxeCantDropAcquiredDB,[nil]);
    with FFirebird30ClientAPI do
    begin
      EndAllTransactions;
      EndSession(false);
      FAttachmentIntf.dropDatabase(StatusIntf);
      Check4DataBaseError;
    end;
    AttachmentIntf := nil;
  end;
end;

function TFB30Attachment.StartTransaction(TPB: array of byte;
  DefaultCompletion: TTransactionCompletion; aName: AnsiString): ITransaction;
begin
  CheckHandle;
  Result := TFB30Transaction.Create(FFirebird30ClientAPI,self,TPB,DefaultCompletion, aName);
end;

function TFB30Attachment.StartTransaction(TPB: ITPB;
  DefaultCompletion: TTransactionCompletion; aName: AnsiString): ITransaction;
begin
  CheckHandle;
  Result := TFB30Transaction.Create(FFirebird30ClientAPI,self,TPB,DefaultCompletion,aName);
end;

procedure TFB30Attachment.ExecImmediate(transaction: ITransaction; sql: AnsiString;
  aSQLDialect: integer);
begin
  CheckHandle;
  with FFirebird30ClientAPI do
  try
    FAttachmentIntf.execute(StatusIntf,(transaction as TFB30Transaction).TransactionIntf,
                    Length(sql),PAnsiChar(sql),aSQLDialect,nil,nil,nil,nil);
    Check4DataBaseError;
  finally
    if JournalingActive and
      ((joReadOnlyQueries in GetJournalOptions)  or
      (joModifyQueries in GetJournalOptions)) then
      ExecImmediateJnl(sql,transaction);
  end;
end;

function TFB30Attachment.Prepare(transaction: ITransaction; sql: AnsiString;
  aSQLDialect: integer; CursorName: AnsiString): IStatement;
begin
  CheckHandle;
  Result := TFB30Statement.Create(self,transaction,sql,aSQLDialect,CursorName);
end;

function TFB30Attachment.PrepareWithNamedParameters(transaction: ITransaction;
  sql: AnsiString; aSQLDialect: integer; GenerateParamNames: boolean;
  CaseSensitiveParams: boolean; CursorName: AnsiString): IStatement;
begin
  CheckHandle;
  Result := TFB30Statement.CreateWithParameterNames(self,transaction,sql,aSQLDialect,
         GenerateParamNames,CaseSensitiveParams,CursorName);
end;

function TFB30Attachment.GetEventHandler(Events: TStrings): IEvents;
begin
  CheckHandle;
  Result := TFB30Events.Create(self,Events);
end;

function TFB30Attachment.CreateBlob(transaction: ITransaction;
  BlobMetaData: IBlobMetaData; BPB: IBPB): IBlob;
begin
  CheckHandle;
  Result := TFB30Blob.Create(self,transaction as TFB30Transaction, BlobMetaData,BPB);
end;

function TFB30Attachment.CreateBlob(transaction: ITransaction;
  SubType: integer; aCharSetID: cardinal; BPB: IBPB): IBlob;
begin
  CheckHandle;
  Result := TFB30Blob.Create(self,transaction as TFB30Transaction, SubType,aCharSetID,BPB);
end;

function TFB30Attachment.OpenBlob(transaction: ITransaction;
  BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB): IBlob;
begin
  CheckHandle;
  Result :=  TFB30Blob.Create(self,transaction as TFB30transaction,BlobMetaData,BlobID,BPB);
end;

function TFB30Attachment.OpenArray(transaction: ITransaction;
  ArrayMetaData: IArrayMetaData; ArrayID: TISC_QUAD): IArray;
begin
  CheckHandle;
  Result := TFB30Array.Create(self,transaction as TFB30Transaction,
                    ArrayMetaData,ArrayID);
end;

function TFB30Attachment.CreateArray(transaction: ITransaction;
  ArrayMetaData: IArrayMetaData): IArray;
begin
  CheckHandle;
  Result := TFB30Array.Create(self,transaction as TFB30Transaction,ArrayMetaData);
end;

function TFB30Attachment.CreateArrayMetaData(SQLType: cardinal; tableName: AnsiString; columnName: AnsiString;
  Scale: integer; size: cardinal; aCharSetID: cardinal; dimensions: cardinal;
  bounds: TArrayBounds): IArrayMetaData;
begin
  Result := TFB30ArrayMetaData.Create(self,SQLType,tableName,ColumnName,Scale,size,aCharSetID, dimensions,bounds);
end;

function TFB30Attachment.GetBlobMetaData(Transaction: ITransaction; tableName,
  columnName: AnsiString): IBlobMetaData;
begin
  CheckHandle;
  Result := TFB30BlobMetaData.Create(self,Transaction as TFB30Transaction,tableName,columnName);
end;

function TFB30Attachment.GetArrayMetaData(Transaction: ITransaction; tableName,
  columnName: AnsiString): IArrayMetaData;
begin
  CheckHandle;
  Result := TFB30ArrayMetaData.Create(self,Transaction as TFB30Transaction,tableName,columnName);
end;

procedure TFB30Attachment.getFBVersion(version: TStrings);
var bufferObj: TVersionCallback;
begin
  version.Clear;
  bufferObj := TVersionCallback.Create(Firebird30ClientAPI,version);
  try
    with FFirebird30ClientAPI do
    begin
       UtilIntf.getFbVersion(StatusIntf,FAttachmentIntf,bufferObj);
       Check4DataBaseError;
    end;
  finally
    bufferObj.Free;
  end;
end;

function TFB30Attachment.HasDecFloatSupport: boolean;
begin
  Result := (FFirebird30ClientAPI.GetClientMajor >= 4) and
   (GetODSMajorVersion >= 13);
end;

function TFB30Attachment.HasBatchMode: boolean;
begin
  Result := FFirebird30ClientAPI.Firebird4orLater and
     (GetODSMajorVersion >= 13);
end;

function TFB30Attachment.HasScollableCursors: boolean;
begin
  Result := (GetODSMajorVersion >= 12);
end;

function TFB30Attachment.GetTimeZoneServices: ITimeZoneServices;
begin
  if not HasTimeZoneSupport then
    IBError(ibxeNotSupported,[]);

  if FTimeZoneServices = nil then
    FTimeZoneServices := TFB30TimeZoneServices.Create(self);
  Result := FTimeZoneServices;
end;

function TFB30Attachment.HasTimeZoneSupport: boolean;
begin
  Result := (FFirebird30ClientAPI.GetClientMajor >= 4) and
   (GetODSMajorVersion >= 13);
end;

end.

Revision:	390
Committed:	Sat Jan 22 16:15:12 2022 UTC (2 years, 3 months ago) by tony
Content type:	text/x-pascal
File size:	16490 byte(s)
Log Message:	In Firebird 3 and later API: the status vector is now a thread var
#	Content
1	(*
2	* Firebird Interface (fbintf). The fbintf components provide a set of
3	* Pascal language bindings for the Firebird API.
4	*
5	* The contents of this file are subject to the Initial Developer's
6	* Public License Version 1.0 (the "License"); you may not use this
7	* file except in compliance with the License. You may obtain a copy
8	* of the License here:
9	*
10	* http://www.firebirdsql.org/index.php?op=doc&id=idpl
11	*
12	* Software distributed under the License is distributed on an "AS
13	* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
14	* implied. See the License for the specific language governing rights
15	* and limitations under the License.
16	*
17	* The Initial Developer of the Original Code is Tony Whyman.
18	*
19	* The Original Code is (C) 2016 Tony Whyman, MWA Software
20	* (http://www.mwasoftware.co.uk).
21	*
22	* All Rights Reserved.
23	*
24	* Contributor(s): ______________________________________.
25	*
26	*)
27	unit FB30Attachment;
28	{$IFDEF MSWINDOWS}
29	{$DEFINE WINDOWS}
30	{$ENDIF}
31
32	{$IFDEF FPC}
33	{$mode delphi}
34	{$interfaces COM}
35	{$ENDIF}
36
37	interface
38
39	uses
40	Classes, SysUtils, FBAttachment, FBClientAPI, FB30ClientAPI, Firebird, IB,
41	FBActivityMonitor, FBParamBlock;
42
43	type
44
45	{ TFB30Attachment }
46
47	TFB30Attachment = class(TFBAttachment,IAttachment, IActivityMonitor)
48	private
49	FAttachmentIntf: Firebird.IAttachment;
50	FFirebird30ClientAPI: TFB30ClientAPI;
51	FTimeZoneServices: ITimeZoneServices;
52	FUsingRemoteICU: boolean;
53	FOwnsAttachmentHandle: boolean;
54	procedure SetAttachmentIntf(AValue: Firebird.IAttachment);
55	procedure SetUseRemoteICU(aValue: boolean);
56	protected
57	procedure CheckHandle; override;
58	function GetAttachment: IAttachment; override;
59	public
60	constructor Create(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
61	RaiseExceptionOnConnectError: boolean); overload;
62	constructor Create(api: TFB30ClientAPI;
63	attachment: Firebird.IAttachment; aDatabaseName: AnsiString); overload;
64	constructor CreateDatabase(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB; RaiseExceptionOnError: boolean); overload;
65	constructor CreateDatabase(api: TFB30ClientAPI; sql: AnsiString; aSQLDialect: integer;
66	RaiseExceptionOnError: boolean); overload;
67	function GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer): IDBInformation;
68	override;
69	property AttachmentIntf: Firebird.IAttachment read FAttachmentIntf write SetAttachmentIntf;
70	property Firebird30ClientAPI: TFB30ClientAPI read FFirebird30ClientAPI;
71
72	public
73	{IAttachment}
74	procedure Connect;
75	procedure Disconnect(Force: boolean=false); override;
76	function IsConnected: boolean; override;
77	procedure DropDatabase;
78	function StartTransaction(TPB: array of byte; DefaultCompletion: TTransactionCompletion; aName: AnsiString=''): ITransaction; override;
79	function StartTransaction(TPB: ITPB; DefaultCompletion: TTransactionCompletion; aName: AnsiString=''): ITransaction; override;
80	procedure ExecImmediate(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer); override;
81	function Prepare(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer; CursorName: AnsiString=''): IStatement; override;
82	function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
83	aSQLDialect: integer; GenerateParamNames: boolean=false;
84	CaseSensitiveParams: boolean=false; CursorName: AnsiString=''): IStatement; override;
85
86	{Events}
87	function GetEventHandler(Events: TStrings): IEvents; override;
88
89	{Blob - may use to open existing Blobs. However, ISQLData.AsBlob is preferred}
90
91	function CreateBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BPB: IBPB=nil): IBlob; overload; override;
92	function CreateBlob(transaction: ITransaction; SubType: integer; aCharSetID: cardinal=0; BPB: IBPB=nil): IBlob; overload;
93	function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload; override;
94
95	{Array}
96	function OpenArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData; ArrayID: TISC_QUAD): IArray; overload; override;
97	function CreateArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData): IArray; overload; override;
98	function CreateArrayMetaData(SQLType: cardinal; tableName: AnsiString;
99	columnName: AnsiString; Scale: integer; size: cardinal; aCharSetID: cardinal;
100	dimensions: cardinal; bounds: TArrayBounds): IArrayMetaData;
101
102
103	{Database Information}
104	function GetBlobMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IBlobMetaData; override;
105	function GetArrayMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IArrayMetaData; override;
106	procedure getFBVersion(version: TStrings);
107	function HasDecFloatSupport: boolean; override;
108	function HasBatchMode: boolean; override;
109	function HasScollableCursors: boolean;
110
111	{Time Zone Support}
112	function GetTimeZoneServices: ITimeZoneServices; override;
113	function HasTimeZoneSupport: boolean; override;
114	end;
115
116	implementation
117
118	uses FB30Transaction, FB30Statement, FB30Array, FB30Blob, FBMessages,
119	FBOutputBlock, FB30Events, IBUtils, FB30TimeZoneServices;
120
121	type
122	{ TVersionCallback }
123
124	TVersionCallback = class(Firebird.IVersionCallbackImpl)
125	private
126	FOutput: TStrings;
127	FFirebirdClientAPI: TFBClientAPI;
128	public
129	constructor Create(FirebirdClientAPI: TFBClientAPI; output: TStrings);
130	procedure callback(status: Firebird.IStatus; text: PAnsiChar); override;
131	end;
132
133	{ TVersionCallback }
134
135	constructor TVersionCallback.Create(FirebirdClientAPI: TFBClientAPI;
136	output: TStrings);
137	begin
138	inherited Create;
139	FFirebirdClientAPI := FirebirdClientAPI;
140	FOutput := output;
141	end;
142
143	procedure TVersionCallback.callback(status: Firebird.IStatus; text: PAnsiChar);
144	var aStatus: IStatus;
145	begin
146	aStatus := TFB30Status.Create(FFirebirdClientAPI,status);
147	if aStatus.InErrorState then
148	raise EIBInterBaseError.Create(aStatus);
149	FOutput.Add(text);
150	end;
151
152
153	{ TFB30Attachment }
154
155	procedure TFB30Attachment.SetUseRemoteICU(aValue: boolean);
156	begin
157	if (FUsingRemoteICU <> aValue) and (GetODSMajorVersion >= 13) then
158	begin
159	if aValue then
160	ExecImmediate([isc_tpb_write,isc_tpb_wait,isc_tpb_concurrency],'SET BIND OF TIME ZONE TO EXTENDED')
161	else
162	ExecImmediate([isc_tpb_write,isc_tpb_wait,isc_tpb_concurrency],'SET BIND OF TIME ZONE TO NATIVE');
163	FUsingRemoteICU := aValue;
164	end;
165	end;
166
167	procedure TFB30Attachment.SetAttachmentIntf(AValue: Firebird.IAttachment);
168	begin
169	if FAttachmentIntf = AValue then Exit;
170	if FAttachmentIntf <> nil then
171	try
172	FAttachmentIntf.release;
173	except {ignore - forced release}
174	end;
175	FOwnsAttachmentHandle := false;
176	ClearCachedInfo;
177	FTimeZoneServices := nil;
178	FAttachmentIntf := AValue;
179	if FAttachmentIntf <> nil then
180	FAttachmentIntf.AddRef;
181	end;
182
183	procedure TFB30Attachment.CheckHandle;
184	begin
185	if FAttachmentIntf = nil then
186	IBError(ibxeDatabaseClosed,[nil]);
187	end;
188
189	function TFB30Attachment.GetAttachment: IAttachment;
190	begin
191	Result := self;
192	end;
193
194	constructor TFB30Attachment.Create(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
195	RaiseExceptionOnConnectError: boolean);
196	begin
197	FFirebird30ClientAPI := api;
198	if aDPB = nil then
199	begin
200	if RaiseExceptionOnConnectError then
201	IBError(ibxeNoDPB,[nil]);
202	Exit;
203	end;
204	inherited Create(api,DatabaseName,aDPB,RaiseExceptionOnConnectError);
205	Connect;
206	end;
207
208	constructor TFB30Attachment.CreateDatabase(api: TFB30ClientAPI; DatabaseName: AnsiString; aDPB: IDPB;
209	RaiseExceptionOnError: boolean);
210	var Param: IDPBItem;
211	sql: AnsiString;
212	IsCreateDB: boolean;
213	Intf: Firebird.IAttachment;
214	begin
215	inherited Create(api,DatabaseName,aDPB,RaiseExceptionOnError);
216	FFirebird30ClientAPI := api;
217	IsCreateDB := true;
218	if aDPB <> nil then
219	begin
220	Param := aDPB.Find(isc_dpb_set_db_SQL_dialect);
221	if Param <> nil then
222	SetSQLDialect(Param.AsByte);
223	end;
224	sql := GenerateCreateDatabaseSQL(DatabaseName,aDPB);
225	with FFirebird30ClientAPI do
226	begin
227	Intf := UtilIntf.executeCreateDatabase(StatusIntf,Length(sql),
228	PAnsiChar(sql),SQLDialect,@IsCreateDB);
229	if FRaiseExceptionOnConnectError then Check4DataBaseError;
230	if not InErrorState then
231	begin
232	if aDPB <> nil then
233	{Connect using known parameters}
234	begin
235	Intf.Detach(StatusIntf); {releases interface}
236	Check4DataBaseError;
237	Connect;
238	end
239	else
240	AttachmentIntf := Intf;
241	FOwnsAttachmentHandle:= true;
242	end;
243	end;
244	end;
245
246	constructor TFB30Attachment.CreateDatabase(api: TFB30ClientAPI; sql: AnsiString; aSQLDialect: integer;
247	RaiseExceptionOnError: boolean);
248	var IsCreateDB: boolean;
249	Intf: Firebird.IAttachment;
250	begin
251	inherited Create(api,'',nil,RaiseExceptionOnError);
252	FFirebird30ClientAPI := api;
253	SetSQLDialect(aSQLDialect);
254	with FFirebird30ClientAPI do
255	begin
256	Intf := UtilIntf.executeCreateDatabase(StatusIntf,Length(sql),
257	PAnsiChar(sql),aSQLDialect,@IsCreateDB);
258	if FRaiseExceptionOnConnectError then Check4DataBaseError;
259	if InErrorState then
260	Exit;
261	end;
262	AttachmentIntf := Intf;
263	FOwnsAttachmentHandle:= true;
264	ExtractConnectString(sql,FDatabaseName);
265	DPBFromCreateSQL(sql);
266	end;
267
268	constructor TFB30Attachment.Create(api: TFB30ClientAPI;
269	attachment: Firebird.IAttachment; aDatabaseName: AnsiString);
270	begin
271	inherited Create(api,aDatabaseName,nil,false);
272	FFirebird30ClientAPI := api;
273	AttachmentIntf := attachment;
274	end;
275
276	function TFB30Attachment.GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer): IDBInformation;
277	begin
278	Result := TDBInformation.Create(Firebird30ClientAPI);
279	with FFirebird30ClientAPI, Result as TDBInformation do
280	begin
281	FAttachmentIntf.getInfo(StatusIntf, ReqBufLen, BytePtr(ReqBuffer),
282	getBufSize, BytePtr(Buffer));
283	Check4DataBaseError;
284	end
285	end;
286
287	procedure TFB30Attachment.Connect;
288	var Intf: Firebird.IAttachment;
289	begin
290	with FFirebird30ClientAPI do
291	begin
292	Intf := ProviderIntf.attachDatabase(StatusIntf,PAnsiChar(FDatabaseName),
293	(DPB as TDPB).getDataLength,
294	BytePtr((DPB as TDPB).getBuffer));
295	if FRaiseExceptionOnConnectError then Check4DataBaseError;
296	if not InErrorState then
297	begin
298	AttachmentIntf := Intf;
299	FOwnsAttachmentHandle := true;
300	end;
301	end;
302	end;
303
304	procedure TFB30Attachment.Disconnect(Force: boolean);
305	begin
306	if IsConnected then
307	begin
308	EndAllTransactions;
309	if FOwnsAttachmentHandle then
310	with FFirebird30ClientAPI do
311	begin
312	FAttachmentIntf.Detach(StatusIntf);
313	if not Force and InErrorState then
314	IBDataBaseError;
315	end;
316	AttachmentIntf := nil;
317	end;
318	inherited Disconnect(Force);
319	end;
320
321	function TFB30Attachment.IsConnected: boolean;
322	begin
323	Result := FAttachmentIntf <> nil;
324	end;
325
326	procedure TFB30Attachment.DropDatabase;
327	begin
328	if IsConnected then
329	begin
330	if not FOwnsAttachmentHandle then
331	IBError(ibxeCantDropAcquiredDB,[nil]);
332	with FFirebird30ClientAPI do
333	begin
334	EndAllTransactions;
335	EndSession(false);
336	FAttachmentIntf.dropDatabase(StatusIntf);
337	Check4DataBaseError;
338	end;
339	AttachmentIntf := nil;
340	end;
341	end;
342
343	function TFB30Attachment.StartTransaction(TPB: array of byte;
344	DefaultCompletion: TTransactionCompletion; aName: AnsiString): ITransaction;
345	begin
346	CheckHandle;
347	Result := TFB30Transaction.Create(FFirebird30ClientAPI,self,TPB,DefaultCompletion, aName);
348	end;
349
350	function TFB30Attachment.StartTransaction(TPB: ITPB;
351	DefaultCompletion: TTransactionCompletion; aName: AnsiString): ITransaction;
352	begin
353	CheckHandle;
354	Result := TFB30Transaction.Create(FFirebird30ClientAPI,self,TPB,DefaultCompletion,aName);
355	end;
356
357	procedure TFB30Attachment.ExecImmediate(transaction: ITransaction; sql: AnsiString;
358	aSQLDialect: integer);
359	begin
360	CheckHandle;
361	with FFirebird30ClientAPI do
362	try
363	FAttachmentIntf.execute(StatusIntf,(transaction as TFB30Transaction).TransactionIntf,
364	Length(sql),PAnsiChar(sql),aSQLDialect,nil,nil,nil,nil);
365	Check4DataBaseError;
366	finally
367	if JournalingActive and
368	((joReadOnlyQueries in GetJournalOptions) or
369	(joModifyQueries in GetJournalOptions)) then
370	ExecImmediateJnl(sql,transaction);
371	end;
372	end;
373
374	function TFB30Attachment.Prepare(transaction: ITransaction; sql: AnsiString;
375	aSQLDialect: integer; CursorName: AnsiString): IStatement;
376	begin
377	CheckHandle;
378	Result := TFB30Statement.Create(self,transaction,sql,aSQLDialect,CursorName);
379	end;
380
381	function TFB30Attachment.PrepareWithNamedParameters(transaction: ITransaction;
382	sql: AnsiString; aSQLDialect: integer; GenerateParamNames: boolean;
383	CaseSensitiveParams: boolean; CursorName: AnsiString): IStatement;
384	begin
385	CheckHandle;
386	Result := TFB30Statement.CreateWithParameterNames(self,transaction,sql,aSQLDialect,
387	GenerateParamNames,CaseSensitiveParams,CursorName);
388	end;
389
390	function TFB30Attachment.GetEventHandler(Events: TStrings): IEvents;
391	begin
392	CheckHandle;
393	Result := TFB30Events.Create(self,Events);
394	end;
395
396	function TFB30Attachment.CreateBlob(transaction: ITransaction;
397	BlobMetaData: IBlobMetaData; BPB: IBPB): IBlob;
398	begin
399	CheckHandle;
400	Result := TFB30Blob.Create(self,transaction as TFB30Transaction, BlobMetaData,BPB);
401	end;
402
403	function TFB30Attachment.CreateBlob(transaction: ITransaction;
404	SubType: integer; aCharSetID: cardinal; BPB: IBPB): IBlob;
405	begin
406	CheckHandle;
407	Result := TFB30Blob.Create(self,transaction as TFB30Transaction, SubType,aCharSetID,BPB);
408	end;
409
410	function TFB30Attachment.OpenBlob(transaction: ITransaction;
411	BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB): IBlob;
412	begin
413	CheckHandle;
414	Result := TFB30Blob.Create(self,transaction as TFB30transaction,BlobMetaData,BlobID,BPB);
415	end;
416
417	function TFB30Attachment.OpenArray(transaction: ITransaction;
418	ArrayMetaData: IArrayMetaData; ArrayID: TISC_QUAD): IArray;
419	begin
420	CheckHandle;
421	Result := TFB30Array.Create(self,transaction as TFB30Transaction,
422	ArrayMetaData,ArrayID);
423	end;
424
425	function TFB30Attachment.CreateArray(transaction: ITransaction;
426	ArrayMetaData: IArrayMetaData): IArray;
427	begin
428	CheckHandle;
429	Result := TFB30Array.Create(self,transaction as TFB30Transaction,ArrayMetaData);
430	end;
431
432	function TFB30Attachment.CreateArrayMetaData(SQLType: cardinal; tableName: AnsiString; columnName: AnsiString;
433	Scale: integer; size: cardinal; aCharSetID: cardinal; dimensions: cardinal;
434	bounds: TArrayBounds): IArrayMetaData;
435	begin
436	Result := TFB30ArrayMetaData.Create(self,SQLType,tableName,ColumnName,Scale,size,aCharSetID, dimensions,bounds);
437	end;
438
439	function TFB30Attachment.GetBlobMetaData(Transaction: ITransaction; tableName,
440	columnName: AnsiString): IBlobMetaData;
441	begin
442	CheckHandle;
443	Result := TFB30BlobMetaData.Create(self,Transaction as TFB30Transaction,tableName,columnName);
444	end;
445
446	function TFB30Attachment.GetArrayMetaData(Transaction: ITransaction; tableName,
447	columnName: AnsiString): IArrayMetaData;
448	begin
449	CheckHandle;
450	Result := TFB30ArrayMetaData.Create(self,Transaction as TFB30Transaction,tableName,columnName);
451	end;
452
453	procedure TFB30Attachment.getFBVersion(version: TStrings);
454	var bufferObj: TVersionCallback;
455	begin
456	version.Clear;
457	bufferObj := TVersionCallback.Create(Firebird30ClientAPI,version);
458	try
459	with FFirebird30ClientAPI do
460	begin
461	UtilIntf.getFbVersion(StatusIntf,FAttachmentIntf,bufferObj);
462	Check4DataBaseError;
463	end;
464	finally
465	bufferObj.Free;
466	end;
467	end;
468
469	function TFB30Attachment.HasDecFloatSupport: boolean;
470	begin
471	Result := (FFirebird30ClientAPI.GetClientMajor >= 4) and
472	(GetODSMajorVersion >= 13);
473	end;
474
475	function TFB30Attachment.HasBatchMode: boolean;
476	begin
477	Result := FFirebird30ClientAPI.Firebird4orLater and
478	(GetODSMajorVersion >= 13);
479	end;
480
481	function TFB30Attachment.HasScollableCursors: boolean;
482	begin
483	Result := (GetODSMajorVersion >= 12);
484	end;
485
486	function TFB30Attachment.GetTimeZoneServices: ITimeZoneServices;
487	begin
488	if not HasTimeZoneSupport then
489	IBError(ibxeNotSupported,[]);
490
491	if FTimeZoneServices = nil then
492	FTimeZoneServices := TFB30TimeZoneServices.Create(self);
493	Result := FTimeZoneServices;
494	end;
495
496	function TFB30Attachment.HasTimeZoneSupport: boolean;
497	begin
498	Result := (FFirebird30ClientAPI.GetClientMajor >= 4) and
499	(GetODSMajorVersion >= 13);
500	end;
501
502	end.
503