/** * Compute the difference between two index objects * * @param Index $fromIndex * @param Index $toIndex * @param boolean $caseInsensitive Whether the comparison is case insensitive. * False by default. * * @return boolean false if the two indices are similar, true if they have differences */ public static function computeDiff(Index $fromIndex, Index $toIndex, $caseInsensitive = false) { // Check for removed index columns in $toIndex $fromIndexColumns = $fromIndex->getColumns(); for ($i = 0; $i < count($fromIndexColumns); $i++) { $indexColumn = $fromIndexColumns[$i]; if (!$toIndex->hasColumnAtPosition($i, $indexColumn, null, $caseInsensitive)) { return true; } } // Check for new index columns in $toIndex $toIndexColumns = $toIndex->getColumns(); for ($i = 0; $i < count($toIndexColumns); $i++) { $indexColumn = $toIndexColumns[$i]; if (!$fromIndex->hasColumnAtPosition($i, $indexColumn, null, $caseInsensitive)) { return true; } } // Check for difference in unicity if ($fromIndex->isUnique() != $toIndex->isUnique()) { return true; } return false; }
/** * Finds the difference between the indexes $index1 and $index2. * * Compares $index1 with $index2 and returns $index2 if there are any * differences or false in case there are no differences. * * @param Index $index1 * @param Index $index2 * @return bool */ public function diffIndex(Index $index1, Index $index2) { if ($index1->isPrimary() != $index2->isPrimary()) { return true; } if ($index1->isUnique() != $index2->isUnique()) { return true; } // Check for removed index fields in $index2 $index1Columns = $index1->getColumns(); for ($i = 0; $i < count($index1Columns); $i++) { $indexColumn = $index1Columns[$i]; if (!$index2->hasColumnAtPosition($indexColumn, $i)) { return true; } } // Check for new index fields in $index2 $index2Columns = $index2->getColumns(); for ($i = 0; $i < count($index2Columns); $i++) { $indexColumn = $index2Columns[$i]; if (!$index1->hasColumnAtPosition($indexColumn, $i)) { return true; } } return false; }