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Re: V 2.17.0 - dml.mysqili.class.inc [message #7530 is a reply to message #7529] Sun, 06 December 2020 12:12 Go to previous messageGo to previous message
AJM is currently offline  AJM
Messages: 2382
Registered: April 2006
Location: Surrey, UK
Senior Member
As the SQL_CALC_FOUND_ROWS query modifier is being deprecated in MySQL 8 (refer to https://dev.mysql.com/doc/refman/8.0/en/information-function s.html#function_found-rows) I have had to perform the count in a separate query. I do this by enclosing the query in the following
SELECT count(*) FROM (
   ... your query ...
) AS x
If your query starts with 'SELECT *' and joins to one or more other tables, then any column name which appears in more than one table will be flagged as a duplicate. You can get around this by specifying 'SELECT <table>.*' so that it ignores columns on any JOINed tables.

I am surprised that the call to selectAllColumns() within the _sqlAssembleWhere() method of std.table.class.inc did not automatically replace '*' with a full list of column names. This is followed by a call to removeDuplicateFromSelect() which is supposed to remove any duplicate column names and so avoid this issue.

Tony Marston
http://www.tonymarston.net
http://www.radicore.org

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