includes/installer/OracleUpdater.php

   1 <?php
   2 /**
   3  * Oracle-specific updater.
   4  *
   5  * @file
   6  * @ingroup Deployment
   7  */
   8
   9 /**
  10  * Class for handling updates to Oracle databases.
  11  *
  12  * @ingroup Deployment
  13  * @since 1.17
  14  */
  15 class OracleUpdater extends DatabaseUpdater {
  16
  17         /**
  18          * Handle to the database subclass
  19          *
  20          * @var DatabaseOracle
  21          */
  22         protected $db;
  23
  24         protected function getCoreUpdateList() {
  25                 return array(
  26                         // 1.17
  27                         array( 'doNamespaceDefaults' ),
  28                         array( 'doFKRenameDeferr' ),
  29                         array( 'doFunctions17' ),
  30                         array( 'doSchemaUpgrade17' ),
  31                         array( 'doInsertPage0' ),
  32                         array( 'doRemoveNotNullEmptyDefaults' ),
  33
  34                         //1.18
  35                         array( 'addIndex',      'user',          'i02',       'patch-user_email_index.sql' ),
  36                         array( 'modifyField', 'user_properties', 'up_property', 'patch-up_property.sql' ),
  37
  38                         // 1.19
  39                         array( 'addTable', 'config', 'patch-config.sql' ),
  40
  41
  42                         // till 2.0 i guess
  43                         array( 'doRebuildDuplicateFunction' ),
  44
  45                 );
  46         }
  47
  48         /**
  49          * MySQL uses datatype defaults for NULL inserted into NOT NULL fields
  50          * In namespace case that results into insert of 0 which is default namespace
  51          * Oracle inserts NULL, so namespace fields should have a default value
  52          */
  53         protected function doNamespaceDefaults() {
  54                 $this->output( "Altering namespace fields with default value ... " );
  55                 $meta = $this->db->fieldInfo( 'page', 'page_namespace' );
  56                 if ( $meta->defaultValue() != null ) {
  57                         $this->output( "defaults seem to present on namespace fields\n" );
  58                         return;
  59                 }
  60
  61                 $this->applyPatch( 'patch_namespace_defaults.sql', false );
  62                 $this->output( "ok\n" );
  63         }
  64
  65         /**
  66          * Uniform FK names + deferrable state
  67          */
  68         protected function doFKRenameDeferr() {
  69                 $this->output( "Altering foreign keys ... " );
  70                 $meta = $this->db->query( 'SELECT COUNT(*) cnt FROM user_constraints WHERE constraint_type = \'R\' AND deferrable = \'DEFERRABLE\'' );
  71                 $row = $meta->fetchRow();
  72                 if ( $row && $row['cnt'] > 0 ) {
  73                         $this->output( "at least one FK is deferrable, considering up to date\n" );
  74                         return;
  75                 }
  76
  77                 $this->applyPatch( 'patch_fk_rename_deferred.sql', false );
  78                 $this->output( "ok\n" );
  79         }
  80
  81         /**
  82          * Recreate functions to 17 schema layout
  83          */
  84         protected function doFunctions17() {
  85                 $this->output( "Recreating functions ... " );
  86                 $this->applyPatch( 'patch_create_17_functions.sql', false );
  87                 $this->output( "ok\n" );
  88         }
  89
  90         /**
  91          * Schema upgrade 16->17
  92          * there are no incremental patches prior to this
  93          */
  94         protected function doSchemaUpgrade17() {
  95                 $this->output( "Updating schema to 17 ... " );
  96                 // check if iwlinks table exists which was added in 1.17
  97                 if ( $this->db->tableExists( 'iwlinks' ) ) {
  98                         $this->output( "schema seem to be up to date.\n" );
  99                         return;
 100                 }
 101                 $this->applyPatch( 'patch_16_17_schema_changes.sql', false );
 102                 $this->output( "ok\n" );
 103         }
 104
 105         /**
 106          * Insert page (page_id = 0) to prevent FK constraint violation
 107          */
 108         protected function doInsertPage0() {
 109                 $this->output( "Inserting page 0 if missing ... " );
 110                 $row = array(
 111                         'page_id' => 0,
 112                         'page_namespace' => 0,
 113                         'page_title' => ' ',
 114                         'page_counter' => 0,
 115                         'page_is_redirect' => 0,
 116                         'page_is_new' => 0,
 117                         'page_random' => 0,
 118                         'page_touched' => $this->db->timestamp(),
 119                         'page_latest' => 0,
 120                         'page_len' => 0
 121                 );
 122                 $this->db->insert( 'page', $row, 'OracleUpdater:doInserPage0', array( 'IGNORE' ) );
 123                 $this->output( "ok\n" );
 124         }
 125
 126         /**
 127          * Remove DEFAULT '' NOT NULL constraints from fields as '' is internally
 128          * converted to NULL in Oracle
 129          */
 130         protected function doRemoveNotNullEmptyDefaults() {
 131                 $this->output( "Removing not null empty constraints ... " );
 132                 $meta = $this->db->fieldInfo( 'categorylinks' , 'cl_sortkey_prefix' );
 133                 if ( $meta->isNullable() ) {
 134                         $this->output( "constraints seem to be removed\n" );
 135                         return;
 136                 }
 137                 $this->applyPatch( 'patch_remove_not_null_empty_defs.sql', false );
 138                 $this->output( "ok\n" );
 139         }
 140
 141         /**
 142          * rebuilding of the function that duplicates tables for tests
 143          */
 144         protected function doRebuildDuplicateFunction() {
 145                 $this->output( "Rebuilding duplicate function ... " );
 146                 $this->applyPatch( 'patch_rebuild_dupfunc.sql', false );
 147                 $this->output( "ok\n" );
 148         }
 149
 150         /**
 151          * Overload: after this action field info table has to be rebuilt
 152          *
 153          * @param $what array
 154          */
 155         public function doUpdates( $what = array( 'core', 'extensions', 'purge' ) ) {
 156                 parent::doUpdates( $what );
 157
 158                 $this->db->query( 'BEGIN fill_wiki_info; END;' );
 159         }
 160
 161 }