- // JOIN on tag_summary
- $tables[] = 'tag_summary';
- $join_conds['tag_summary'] = array( 'LEFT JOIN', "ts_$join_cond=$join_cond" );
- $fields[] = 'ts_tags';
+ $fields['ts_tags'] = wfGetDB( DB_SLAVE )->buildGroupConcatField(
+ ',', 'change_tag', 'ct_tag', $join_cond
+ );