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memory allocation error
Posted: 15.07.2013, 07:36
by hyperlinx
Hello there,
I'm using ZEOSDBO-7.0.3-stable. I got this exception occasionally when inserting values using TZQuery, but other function using similar syntax just fine. so i doing some testing today, and come up something wrong in SetStatementParams().
is something wrong with this code?
Code: Select all
Parameter := TStringList.Create;
Parameter.Delimiter := ';';
Parameter.QuoteChar := '"';
Parameter.Add('PARAM1='+param1);
Parameter.Add('PARAM2='+param2);
Parameter.Add('PARAM3='+param3);
Parameter.Add('PARAM4='+param4);
Parameter.Add('PARAM5='+param5);
MyQuery := TZQuery.Create(nil);
MyQuery.Connection := MainForm.ConnectSQL;
try
SQL := 'INSERT INTO test_table0 (param1, param2, param3, param4, param5, param6, param7, param8, param9) VALUES '+
'(:param1, :param2, :param3, :param4, :param5, :param6, :param7, :param8, :param9)';
MyQuery.SQL.Text := SQL;
MyQuery.ParamByName('param1').AsString := param1;
MyQuery.ParamByName('param2').AsString := param2;
MyQuery.ParamByName('param3').AsString := param3;
MyQuery.ParamByName('param4').AsString := param4;
MyQuery.ParamByName('param5').AsString := param5;
MyQuery.ParamByName('param6').AsString := param6;
MyQuery.ParamByName('param7').AsString := param7;
MyQuery.ParamByName('param8').AsString := param8;
MyQuery.ParamByName('param9').AsString := param9;
MyQuery.ExecSQL;
finally
MyQuery.Close;
MyQuery.Free;
end;
Parameter.Clear;
Parameter.Free;
by the way, i'm using mysql. using connector v5.2w through ado.
thanks in advance
Posted: 16.07.2013, 13:15
by EgonHugeist
hyperlinx,
don't understand your code here.
Parameter := TStringList.Create;
Parameter.Delimiter := ';';
Parameter.QuoteChar := '"';
Parameter.Add('PARAM1='+param1);
Parameter.Add('PARAM2='+param2);
Parameter.Add('PARAM3='+param3);
Parameter.Add('PARAM4='+param4);
Parameter.Add('PARAM5='+param5);
I don't understand the purpose of this code. What is your intention to do?
SQL := 'INSERT INTO test_table0 (param1, param2, param3, param4, param5, param6, param7, param8, param9) VALUES '+
'(:param1, :param2, :param3, :param4, :param5, :param6, :param7, :param8, :param9)';
Are the fields named as param1, param2, param3, param4, param5, param6, param7, param8, param9 ???? Or do you use different names?
MyQuery.SQL.Text := SQL;
MyQuery.ParamByName('param1').AsString := param1;
MyQuery.ParamByName('param2').AsString := param2;
MyQuery.ParamByName('param3').AsString := param3;
MyQuery.ParamByName('param4').AsString := param4;
MyQuery.ParamByName('param5').AsString := param5;
MyQuery.ParamByName('param6').AsString := param6;
MyQuery.ParamByName('param7').AsString := param7;
MyQuery.ParamByName('param8').AsString := param8;
MyQuery.ParamByName('param9').AsString := param9;
MyQuery.ExecSQL;
This part seems to be ok as long the fieldnames are corectly.
Posted: 30.07.2013, 12:31
by hyperlinx
i'm sorry, my code above is not simple enough... here is the one
Code: Select all
MyQuery.SQL.Text := 'INSERT INTO test_table (param1, param2, param3, param4) VALUES (:param1, :param2, :param3, :param4)';
MyQuery.ParamByName('param1').AsString := param1;
MyQuery.ParamByName('param2').Clear;
MyQuery.ParamByName('param3').AsString := param3;
MyQuery.ParamByName('param4').Value := NULL;
if param1 contain text, the operation is ok.
if i use MyQuery.ParamByName('param2').Clear then it will put string 'NULL' into table. hmm?
using this also raise mem alloc error.
if param3 is an empty string (not contain any text), it will raise exception : memory allocation error.
param4 have the same value with param2, column contain text 'NULL'
all column type is varchar(32) how to set null by insert ?
Posted: 30.07.2013, 20:49
by EgonHugeist
hyperlinx,
grumble. ADO and null values.
May i ask for the defaults of the columns? Is it possible they are declared as 'NULL'?
I was also trying to get the issues of miab3 running, see
http://zeos.firmos.at/viewtopic.php?p=17686#17686
I never tryed to use MySQL-connector since the native access is loads faster than using ado. MySQL has it's own affinity like null=null but ''-is not null. I had a look to the ADOStatement. Ther was a user who di omit the null-variants. the code still exists. can you try to play with the null variants there?
Posted: 31.07.2013, 22:23
by EgonHugeist
hyperlinx,
hope i've resolved your issues. Patch done R2596 \testing-7.1 (SVN)
well you've been right. We didn't handle Null values corectly. This patch will be backported to 7.0.5 in a periode of two weeks. If you want to test it than please download 7.1 from our SVN repository.
Re: memory allocation error
Posted: 20.08.2013, 05:54
by hyperlinx
thank you sir, now downloading r2665, and will test it for the other codes.
seem a lot of trouble using ado, now i'm using native mysql as you suggested
