我正在从FIBPlus转换为FireDAC,并且我需要的大多数功能都在FireDAC中,我只是在努力寻找与TpFIBDBSchemaExtract和TpFIBScripter等效的FIBPlus,以将存储过程提取为DDL。
FireDAC是否可以从数据库中提取存储过程DDL?
例如,如下所示:
SET TERM ^ ;
CREATE PROCEDURE MY_PROC RETURNS (aParam INTEGER) AS
BEGIN
aParam = 10;
END^
答案 0 :(得分:3)
FireDAC目前不支持(统一)获取存储过程的DDL定义。因此,您需要自己从RDB$PROCEDURES表的 RDB $ PROCEDURE_SOURCE 列中获取该DDL。例如(尽管不是理想地设计为连接对象助手):
uses
FireDAC.Stan.Util;
type
TFDConnectionHelper = class helper for TFDConnection
public
function GetStoredProcCode(const AName: string): string;
end;
implementation
{ TFDConnectionHelper }
function TFDConnectionHelper.GetStoredProcCode(const AName: string): string;
var
Table: TFDDatSTable;
Command: IFDPhysCommand;
begin
CheckActive;
if RDBMSKind <> TFDRDBMSKinds.Firebird then
raise ENotSupportedException.Create('This feature is supported only for Firebird');
Result := '';
ConnectionIntf.CreateCommand(Command);
Command.CommandText := 'SELECT RDB$PROCEDURE_SOURCE FROM RDB$PROCEDURES WHERE RDB$PROCEDURE_NAME = :Name';
Command.Params[0].DataType := ftString;
Command.Params[0].Size := 31;
Command.Params[0].AsString := UpperCase(AName);
Table := TFDDatSTable.Create;
try
Command.Define(Table);
Command.Open;
Command.Fetch(Table);
if Table.Rows.Count > 0 then
Result := Table.Rows[0].GetData(0);
finally
FDFree(Table);
end;
end;
然后使用(当您连接到Firebird DBMS时):
procedure TForm1.Button1Click(Sender: TObject);
var
S: string;
begin
S := FDConnection1.GetStoredProcCode('MyProcedure');
...
end;