ccache_cleanup: fix sql syntax for mysql

functions.php

@@ -6125,6 +6125,7 @@
 
 	function ccache_cleanup($link, $owner_uid) {
 
+		if (DB_TYPE == "pgsql") {
 			db_query($link, "DELETE FROM ttrss_counters_cache AS c1 WHERE
 				(SELECT count(*) FROM ttrss_counters_cache AS c2
 					WHERE c1.feed_id = c2.feed_id AND c2.owner_uid = c1.owner_uid) > 1
@@ -6134,6 +6135,24 @@
 				(SELECT count(*) FROM ttrss_cat_counters_cache AS c2
 					WHERE c1.feed_id = c2.feed_id AND c2.owner_uid = c1.owner_uid) > 1
 					AND owner_uid = '$owner_uid'");
+		} else {
+			db_query($link, "DELETE c1 FROM
+					ttrss_counters_cache AS c1,
+					ttrss_counters_cache AS c2
+				WHERE
+					c1.owner_uid = '$owner_uid' AND
+					c1.owner_uid = c2.owner_uid AND
+					c1.feed_id = c2.feed_id");
+
+			db_query($link, "DELETE c1 FROM
+					ttrss_cat_counters_cache AS c1,
+					ttrss_cat_counters_cache AS c2
+				WHERE
+					c1.owner_uid = '$owner_uid' AND
+					c1.owner_uid = c2.owner_uid AND
+					c1.feed_id = c2.feed_id");
+
+		}
 	}
 
 	function label_find_id($link, $label, $owner_uid) {