PHP SQLSelect::setFrom方法代码示例

 /**
  * Set up the simplest initial query
  */
 public function initialiseQuery()
 {
     // Get the tables to join to.
     // Don't get any subclass tables - let lazy loading do that.
     $tableClasses = ClassInfo::ancestry($this->dataClass, true);
     // Error checking
     if (!$tableClasses) {
         if (!SS_ClassLoader::instance()->hasManifest()) {
             user_error("DataObjects have been requested before the manifest is loaded. Please ensure you are not" . " querying the database in _config.php.", E_USER_ERROR);
         } else {
             user_error("DataList::create Can't find data classes (classes linked to tables) for" . " {$this->dataClass}. Please ensure you run dev/build after creating a new DataObject.", E_USER_ERROR);
         }
     }
     $baseClass = array_shift($tableClasses);
     // Build our intial query
     $this->query = new SQLSelect(array());
     $this->query->setDistinct(true);
     if ($sort = singleton($this->dataClass)->stat('default_sort')) {
         $this->sort($sort);
     }
     $this->query->setFrom("\"{$baseClass}\"");
     $obj = Injector::inst()->get($baseClass);
     $obj->extend('augmentDataQueryCreation', $this->query, $this);
 }

    public function testParameterisedLeftJoins()
    {
        $query = new SQLSelect();
        $query->setSelect(array('"SQLSelectTest_DO"."Name"', '"SubSelect"."Count"'));
        $query->setFrom('"SQLSelectTest_DO"');
        $query->addLeftJoin('(SELECT "Title", COUNT(*) AS "Count" FROM "SQLSelectTestBase" GROUP BY "Title" HAVING "Title" NOT LIKE ?)', '"SQLSelectTest_DO"."Name" = "SubSelect"."Title"', 'SubSelect', 20, array('%MyName%'));
        $query->addWhere(array('"SQLSelectTest_DO"."Date" > ?' => '2012-08-08 12:00'));
        $this->assertSQLEquals('SELECT "SQLSelectTest_DO"."Name", "SubSelect"."Count"
			FROM "SQLSelectTest_DO" LEFT JOIN (SELECT "Title", COUNT(*) AS "Count" FROM "SQLSelectTestBase"
		   GROUP BY "Title" HAVING "Title" NOT LIKE ?) AS "SubSelect" ON "SQLSelectTest_DO"."Name" =
		   "SubSelect"."Title"
			WHERE ("SQLSelectTest_DO"."Date" > ?)', $query->sql($parameters));
        $this->assertEquals(array('%MyName%', '2012-08-08 12:00'), $parameters);
        $query->execute();
    }

 /**
  * Test passing in a LIMIT with OFFSET clause string.
  */
 public function testLimitSetFromClauseString()
 {
     $query = new SQLSelect();
     $query->setSelect('*');
     $query->setFrom('"SQLQueryTest_DO"');
     $query->setLimit('20 OFFSET 10');
     $limit = $query->getLimit();
     $this->assertEquals(20, $limit['limit']);
     $this->assertEquals(10, $limit['start']);
 }

 /**
  * Return the number of rows in this query if the limit were removed.  Useful in paged data sets.
  *
  * @param string $column
  * @return int
  */
 public function unlimitedRowCount($column = null)
 {
     // we can't clear the select if we're relying on its output by a HAVING clause
     if (count($this->having)) {
         $records = $this->execute();
         return $records->numRecords();
     }
     $clone = clone $this;
     $clone->limit = null;
     $clone->orderby = null;
     // Choose a default column
     if ($column == null) {
         if ($this->groupby) {
             // @todo Test case required here
             $countQuery = new SQLSelect();
             $countQuery->setSelect("count(*)");
             $countQuery->setFrom(array('(' . $clone->sql($innerParameters) . ') all_distinct'));
             $sql = $countQuery->sql($parameters);
             // $parameters should be empty
             $result = DB::prepared_query($sql, $innerParameters);
             return $result->value();
         } else {
             $clone->setSelect(array("count(*)"));
         }
     } else {
         $clone->setSelect(array("count({$column})"));
     }
     $clone->setGroupBy(array());
     return $clone->execute()->value();
 }

 /**
  * Gets the values for multiple rows on a database table by the ID column.
  * Useful when fields have been removed from the class' `$db` property,
  * and therefore are no longer accessible through the ORM.
  * Returns an empty array if the table, any of the columns or the row do not exist.
  *
  * @param    string $table
  * @param    array $fields
  * @param    string|int $id
  * @return    array        array('FieldName' => value)
  */
 public static function getRowValuesFromTable($table, array $fields, $id)
 {
     $values = array();
     if (self::tableColumnsExist($table, $fields)) {
         $id = (int) $id;
         $query = new SQLSelect();
         $query->setFrom($table)->setSelect($fields)->setWhere("ID = {$id}");
         $results = $query->execute();
         if ($results) {
             foreach ($results as $result) {
                 foreach ($fields as $field) {
                     $values[$field] = $result[$field];
                 }
                 break;
             }
         }
     }
     return $values;
 }