* change REPLACE INTO to DELETE/INSERT for nonmysql

* change mysql style join deletes to subselect for nonmysql

diff --git a/includes/LinkCache.php b/includes/LinkCache.php
index d2e1880..512bc7d 100644 (file)
--- a/includes/LinkCache.php
+++ b/includes/LinkCache.php
@@ -302,34 +302,51 @@ class LinkCache {
        }
 
        /* private */ function saveToLinkscc( $pid ){
-               global $wgCompressedPersistentLC;
+               global $wgCompressedPersistentLC, $wgIsMySQL;
                if( $wgCompressedPersistentLC and function_exists( "gzcompress" ) ) {
                        $ser = wfStrencode( gzcompress( serialize( $this ), 3 ));
                } else {
                        $ser = wfStrencode( serialize( $this ) );
                }
-               wfQuery("REPLACE INTO linkscc(lcc_pageid,lcc_cacheobj) " .
-                       "VALUES({$pid}, '{$ser}')", DB_WRITE);
+               if ($isMySQL) {
+                       wfQuery("REPLACE INTO linkscc(lcc_pageid,lcc_cacheobj) " .
+                               "VALUES({$pid}, '{$ser}')", DB_WRITE);
+               } else {
+                       wfQuery("DELETE FROM linkscc WHERE lcc_pageid={$pid}",DB_WRITE);
+                       wfQuery("INSERT INTO linkscc(lcc_pageid,lcc_cacheobj) " .
+                               "VALUES({$pid}, '{$ser}')", DB_WRITE);
+               }
        }
 
        # $pid is a page id
        /* static */ function linksccClearLinksTo( $pid ){
-               global $wgEnablePersistentLC;
+               global $wgEnablePersistentLC, $wgIsMySQL;
                if ( $wgEnablePersistentLC ) {
                        $pid = intval( $pid );
-                       wfQuery("DELETE linkscc FROM linkscc,links ".
-                               "WHERE lcc_pageid=links.l_from AND l_to={$pid}", DB_WRITE);
-                       wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pid}'", DB_WRITE);
+                       if ($wgIsMySQL) {
+                               wfQuery("DELETE linkscc FROM linkscc,links ".
+                                       "WHERE lcc_pageid=links.l_from AND l_to={$pid}", DB_WRITE);
+                       } else {
+                               wfQuery("DELETE FROM linkscc WHERE lcc_pageid IN ".
+                                       "(SELECT l_from FROM links WHERE l_to={$pid}", DB_WRITE);
+                       }
+                       wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pid}')", DB_WRITE);
                }
        }
 
        # $title is a prefixed db title, for example like Title->getPrefixedDBkey() returns.
        /* static */ function linksccClearBrokenLinksTo( $title ){
-               global $wgEnablePersistentLC;
+               global $wgEnablePersistentLC,$wgIsMySQL;
                if ( $wgEnablePersistentLC ) {
                        $title = wfStrencode( $title );
-                       wfQuery("DELETE linkscc FROM linkscc,brokenlinks ".
-                               "WHERE lcc_pageid=bl_from AND bl_to='{$title}'", DB_WRITE);
+                       if ($wgIsMySQL) {
+                               wfQuery("DELETE linkscc FROM linkscc,brokenlinks ".
+                                       "WHERE lcc_pageid=bl_from AND bl_to='{$title}'", DB_WRITE);
+                       } else {
+                               wfQuery("DELETE FROM linkscc WHERE lcc_pageid IN ".
+                                       "(SELECT bl_from FROM brokenlinks ".
+                                       "WHERE bl_to='{$title}')",DB_WRITE);
+                       }
                }
        }