query against pg_trigger causes exception to be raised in PG 9.2

[snorkel]

Hi,
I just noticed that if you do a query like this:

select * from pg_trigger; a exception is raised.

I did some hacking around and discovered that the cause is the tgargs column which is type
bytea.

The exception is not raised on version 8.4 of PostgreSQL, just on 9.0 and up.

I am currently using version 3.2.8 of the PostgresDAC lib.

[AlexP]

Hello,

We cannot reproduce the problem. Please try executing the following code, if the code returns errors - contact us again.

Code: Select all

  PgConnection1.StartTransaction;
  PgQuery1.SQL.Text := 'select * from pg_trigger';
  PgQuery1.Options.OIDAsInt := True;
  PgQuery1.Open;
  ShowMessage(IntToStr(PgQuery1.RecordCount));
  PgQuery1.Close;
  PgConnection1.Rollback;

[snorkel]

yes, that query works, as it's not attached to a dbgrid.
If I attach the query to a dbgrid, it raises this exception:

Project xxxxx raised exception class 'External: SIGSEGV,
in file 'c:\lazarus\components\PGDAC\Source\Memdata.pas' at line 9210: Piece.Blob:=Self.GetHashCode;

exception is also raised in Delphi xe2 when using the stock dbgrid and the quantum grid from dev express except it does not give a line in the source as Lazarus/FPC does.

If I list all the fields in the query except for the args it works as expected. , note this works fine in servers 8.4 and below and shows up in the grid as (blob)

[AlexP]

Hello,

We cannot reproduce the problem either in Lazarus 1.0.12 or in XE2. Please try to reproduce the problem on the latest PgDAC version 4.1.4