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Don't use unbounded SHOW TABLES in is_blog_installed(). Do a more targeted DESCRIBE loop over the blog table list. fixes #19026 

git-svn-id: http://svn.automattic.com/wordpress/trunk@19039 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
ryan 2011-10-21 22:16:33 +00:00
parent f708c5eaff
commit 7a3fc7d36c
1 changed files with 21 additions and 18 deletions
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39
wp-includes/functions.php
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@ -1899,32 +1899,35 @@ function is_blog_installed() {
if ( $installed )
return true;
$suppress = $wpdb->suppress_errors();
$tables = $wpdb->get_col('SHOW TABLES');
$wpdb->suppress_errors( $suppress );
// If visiting repair.php, return true and let it take over.
if ( defined( 'WP_REPAIRING' ) )
return true;
$suppress = $wpdb->suppress_errors();
$wp_tables = $wpdb->tables();
// Loop over the WP tables. If none exist, then scratch install is allowed.
// If one or more exist, suggest table repair since we got here because the options
// table could not be accessed.
$wp_tables = $wpdb->tables();
foreach ( $wp_tables as $table ) {
// If one of the WP tables exist, then we are in an insane state.
if ( in_array( $table, $tables ) ) {
// The existence of custom user tables shouldn't suggest an insane state or prevent a clean install.
if ( defined( 'CUSTOM_USER_TABLE' ) && CUSTOM_USER_TABLE == $table )
continue;
if ( defined( 'CUSTOM_USER_META_TABLE' ) && CUSTOM_USER_META_TABLE == $table )
continue;
// The existence of custom user tables shouldn't suggest an insane state or prevent a clean install.
if ( defined( 'CUSTOM_USER_TABLE' ) && CUSTOM_USER_TABLE == $table )
continue;
if ( defined( 'CUSTOM_USER_META_TABLE' ) && CUSTOM_USER_META_TABLE == $table )
continue;
// If visiting repair.php, return true and let it take over.
if ( defined('WP_REPAIRING') )
return true;
// Die with a DB error.
$wpdb->error = sprintf( /*WP_I18N_NO_TABLES*/'One or more database tables are unavailable. The database may need to be <a href="%s">repaired</a>.'/*/WP_I18N_NO_TABLES*/, 'maint/repair.php?referrer=is_blog_installed' );
dead_db();
}
if ( ! $wpdb->get_results( "DESCRIBE $table;" ) )
continue;
// One or more tables exist. We are insane.
// Die with a DB error.
$wpdb->error = sprintf( /*WP_I18N_NO_TABLES*/'One or more database tables are unavailable. The database may need to be <a href="%s">repaired</a>.'/*/WP_I18N_NO_TABLES*/, 'maint/repair.php?referrer=is_blog_installed' );
dead_db();
}
$wpdb->suppress_errors( $suppress );
wp_cache_set( 'is_blog_installed', false );
return false;