Дата публикации: 20.04.2020
Получение плана запроса (C#, FB)
//////////////////////////////////////////////////////////////////////////////// //Samples for LCPI ADO.NET Data provider for OLEDB. // ibprovider.com. 19.04.2020 using System; using lcpi.data.oledb; //nuget package: lcpi.sdk.ibprovider.v05 using ibp_sdk=lcpi.sdk.ibprovider.v05; namespace Sample_0029{ //////////////////////////////////////////////////////////////////////////////// //class Program class Program { private const string c_cn_str ="provider=LCPI.IBProvider.5;" +"location=localhost:d:\\database\\ram\\ibp_test_fb30_d3.gdb;" +"dbclient_type=fb.direct;" +"user id=GAMER;" +"password=vermut;"; //---------------------------------------------------------------------- static int Main(string[] args) { int resultCode=0; OleDbConnection cn=null; OleDbTransaction tr=null; OleDbCommand cmd=null; try { cn=new OleDbConnection(c_cn_str); cn.Open(); tr=cn.BeginTransaction(); cmd=new OleDbCommand(null,cn,tr); //-------------------- cmd.CommandText ="select ID from DUAL where ID=1"; cmd.Prepare(); object stmtPlan =cmd.Properties.ReadByID (ibp_sdk.IBP_DBPROPSET.STATEMENTINFO.ID, ibp_sdk.IBP_DBPROPSET.STATEMENTINFO.PROPID.PLAN); Console.WriteLine("Stmt Plan: {0}",stmtPlan); //-------------------- tr.Commit(); } catch(Exception e) { resultCode=1; Console.WriteLine(""); Console.WriteLine("ERROR: {0} - {1}",e.Source,e.Message); }//catch finally { Helper__Dispose(ref cmd); Helper__Dispose(ref tr); Helper__Dispose(ref cn); }//finally return resultCode; }//Main //Helper interface ------------------------------------------------------ private static void Helper__Dispose<T>(ref T obj) where T:class, IDisposable { var x=System.Threading.Interlocked.Exchange(ref obj,null); Helper__Dispose(x); }//Helper__Dispose //----------------------------------------------------------------------- private static void Helper__Dispose(IDisposable obj) { if(!Object.ReferenceEquals(obj,null)) obj.Dispose(); }//Helper__Dispose }//class Program //////////////////////////////////////////////////////////////////////////////// }//namespace Sample_0029
Вывод.