UpdateDatabase/EngineCharset.php

diff --git a/UpdateDatabase/EngineCharset.php b/UpdateDatabase/EngineCharset.php
index e69de29..c80b1a3 100644 (file)
--- a/UpdateDatabase/EngineCharset.php
+++ b/UpdateDatabase/EngineCharset.php
@@ -0,0 +1,144 @@
+<?php
+/**
+ * our standard code relies on links.ini files for the relationships in mysql.
+ *
+ * as we use 'loose' relationships - eg. we allow '0' as a missing link mysql FORIEGN KEYS do not really work.
+ *
+ * There are a couple of ideas behind this code.
+ *
+ * a) put the relationships in the table comments FK(col=table:col,col=table:col)
+ *  -- we can not put it in the column comments as there is no clean way to update column comments.
+ *  -- This can be used by external programs to extract the Relationships.
+ *
+ * b) generate triggers? to protect against updates to the database..
+ *
+ *  -- stored procedures are named
+ *     {tablename}_before_{insert|delete|update}
+ *     
+ *  
+ *   initial code will auto generate triggers
+ *   -- how to add User defined modifications to triggers?
+ *   -- we can CALL a stored procedure..?
+ *   -- {tablename}_trigger_{optional_string}_before_delete_{column_name}(NEW.column)
+ *   -- {tablename}_trigger_{optional_string}_before_update_{column_name}(OLD.column, NEW.column}
+ *   -- {tablename}_trigger_{optional_string}_before_insert_{column_name}(OLD.column}
+ *
+ *
+ * ------- Importing with triggers disabled.
+ *
+ *  SET @DISABLE_TRIGGER=1; (or anything you like except NULL) 
+ *  do imports
+ * SET @DISABLE_TRIGGER=NULL;
+ *
+ * ------ Call a method disabling a particular set of triggers
+ *  SET @DISABLE_TRIGGER_the_table_name=1; (or anything you like except NULL) 
+ *  do action
+ *  SET @DISABLE_TRIGGER_the_table_name=NULL;*
+ */
+
+class Pman_Core_UpdateDatabase_MysqlLinks {
+    
+    var $dburl;
+    var $schema;
+    var $links;
+    
+    function __construct()
+    {
+          
+        $this->loadIniFiles(); //?? shared???
+        $this->updateCharacterSet();
+        $this->updateEngine();
+        
+        
+    }
+    
+    function loadIniFiles()
+    {
+        // will create the combined ini cache file for the running user.
+        
+        $ff = HTML_FlexyFramework::get();
+        $ff->generateDataobjectsCache(true);
+        $this->dburl = parse_url($ff->database);
+        
+        $dbini = 'ini_'. basename($this->dburl['path']);
+        
+        
+        $iniCache = $ff->DB_DataObject[$dbini];
+        
+        $this->schema = parse_ini_file($iniCache, true);
+        $this->links = parse_ini_file(preg_replace('/\.ini$/', '.links.ini', $iniCache), true);
+        
+
+        
+    }
+   
+    function updateCharacterSet()
+    {
+        foreach (array_keys($this->schema) as $tbl){
+            
+            if(strpos($tbl, '__keys') !== false ){
+                continue;
+            }
+            
+            $ce = DB_DataObject::factory('core_enum');
+            
+            $ce->query("
+                SELECT
+                        CCSA.character_set_name csname,
+                        CCSA.collation_name collatename
+                FROM
+                        information_schema.`TABLES` T,
+                        information_schema.`COLLATION_CHARACTER_SET_APPLICABILITY` CCSA
+                WHERE
+                        CCSA.collation_name = T.table_collation
+                    AND
+                        T.table_schema = '{$ce->database()}' -- COLLATE utf8_general_ci
+                    AND
+                        T.table_name = '{$tbl}' -- COLLATE utf8_general_ci
+            ");
+                     
+            $ce->fetch();
+            
+            if($ce->csname == 'utf8' && $ce->collatename == 'utf8_general_ci'){
+                echo "$tbl is Already utf8 \n";
+                continue;
+            }
+            // this used to be utf8_unicode_ci
+            //as the default collation for stored procedure parameters is utf8_general_ci and you can't mix collations.
+            
+            $ce = DB_DataObject::factory('core_enum');
+            $ce->query("ALTER TABLE {$tbl} CONVERT TO CHARACTER SET  utf8 COLLATE utf8_general_ci");
+            echo "FIXED utf8 on {$tbl}\n";
+            
+        }
+    }
+    function updateEngine()
+    {
+        foreach (array_keys($this->schema) as $tbl){
+            
+            if(strpos($tbl, '__keys') !== false ){
+                continue;
+            }
+            
+            $ce = DB_DataObject::factory('core_enum');
+            
+            $ce->query("select engine from information_schema.tables where table_schema='hydra' and table_name = 'core_enum'");
+
+            $ce->fetch();
+            
+            if($ce->engine == 'InnoDB' ){
+                echo "SKIP engine on $tbl - already InnoDB\n";
+                continue;
+            }
+            // this used to be utf8_unicode_ci
+            //as the default collation for stored procedure parameters is utf8_general_ci and you can't mix collations.
+            
+            $ce = DB_DataObject::factory('core_enum');
+            $ce->query("ALTER TABLE $tbl ENGINE=InnoDB");
+            echo "FIXED engine on {$tbl}\n";
+            
+        }
+    }
+    
+}
+