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-rw-r--r--include/dblayer/functions_mysqli.inc.php13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/dblayer/functions_mysqli.inc.php b/include/dblayer/functions_mysqli.inc.php
index 5b40cfe5b..f0bca9be6 100644
--- a/include/dblayer/functions_mysqli.inc.php
+++ b/include/dblayer/functions_mysqli.inc.php
@@ -73,6 +73,19 @@ function pwg_db_connect($host, $user, $password, $database)
{
throw new Exception('Connection to server succeed, but it was impossible to connect to database');
}
+
+ // MySQL 5.7 default settings forbid to select a colum that is not in the
+ // group by. We've use that in Piwigo, for years. As an immediate solution
+ // we can remove this constraint in the current MySQL session.
+ list($sql_mode_current) = pwg_db_fetch_row(pwg_query('SELECT @@SESSION.sql_mode'));
+
+ // remove ONLY_FULL_GROUP_BY from the list
+ $sql_mode_altered = implode(',', array_diff(explode(',', $sql_mode_current), array('ONLY_FULL_GROUP_BY')));
+
+ if ($sql_mode_altered != $sql_mode_current)
+ {
+ pwg_query("SET SESSION sql_mode='".$sql_mode_altered."'");
+ }
}
/**