MySQL How to prevent string truncation

Question

I have a SELECT statement in MySQL 5.6 which uses the group_concat function to create a delimited string from many database rows in a table. The length of the string should be several thousand characters in length, but MySQL seems to be automatically truncating the resulting string at 2048 characters.

How can I prevent this from happening?

Answer 1

You can change the value of parameter group_concat_max_len. If you wanted to do that at session-level, that would be:

set session group_concat_max_len = 1000000;