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Understood with the question. The topic is closed.

I'll make an adjustment. "Toad for my sql" also works slowly.

I wanted to clarify. version of Mysql was 5.7.19 and changed to 5.7.22

Hello. There is such a development of "LimeSurvey" which uses the Mysql database (v.5.7). I wrote the program on delphi 5 and ZEOSDBO-6.6.5-stable which executes sql query to several mysql database tables (v.5.7). This sql-request was executed less than 1 second. Recently I had to change t...

Looked in the source files of version 7.2.0 this restriction remains.

file ZPlainMySqlConstants.pas

string

MYSQL_ROW = array [00 .. $ ff] of PAnsiChar;

The error appears from the ZPlainMySqlDriver module in function TZMySQL5PlainDriver.GetFieldData Going further I found in the module zplainMySql5 I found MYSQL_ROW = array [00 .. $ ff] of PChar; This is the restriction in connection with which this error arises. I do not know if it's enough to chang...

As it turned out, I had version 6.6.5-stable. I work with delphi5 and as I understand the version above 6.6.5 it is not supported. In any case, the delphi5 directory does not exist and it is impossible to install from another directory

Well I'll try and write about the result later

when there were 176 fields it worked

Hi!
I would like to clarify. I have a table with 386 columns and this is not the limit that can be. on this amount I have an error

the version I'm using ZEOSDBO-7.1.4-stable

Hello!
I had the same problem. There is a table in mysql where the number of columns is greater than 128, the same error occurs. How to solve it?