checkStatus = -1; // change status to skipped $result = null; // Remove any newlines $this->updateQuery = str_replace("\n", '', $this->updateQuery); // Fix up extra spaces around () and in general $find = array('#((\s*)\(\s*([^)\s]+)\s*)(\))#', '#(\s)(\s*)#'); $replace = array('($3)', '$1'); $updateQuery = preg_replace($find, $replace, $this->updateQuery); $wordArray = explode(' ', $updateQuery); // First, make sure we have an array of at least 6 elements // if not, we can't make a check query for this one if (count($wordArray) < 6) { // Done with method return; } // We can only make check queries for alter table and create table queries $command = strtoupper($wordArray[0] . ' ' . $wordArray[1]); if ($command === 'ALTER TABLE') { $alterCommand = strtoupper($wordArray[3] . ' ' . $wordArray[4]); if ($alterCommand == 'ADD') { $result = 'SELECT * FROM INFORMATION_SCHEMA.Columns ' . $wordArray[2] . ' WHERE COLUMN_NAME = ' . $this->fixQuote($wordArray[5]); $this->queryType = 'ADD'; $this->msgElements = array($this->fixQuote($wordArray[2]), $this->fixQuote($wordArray[5])); } elseif ($alterCommand == 'CREATE INDEX') { $index = $this->fixQuote(substr($wordArray[5], 0, strpos($wordArray[5], '('))); $result = 'SELECT * FROM SYS.INDEXES ' . $wordArray[2] . ' WHERE name = ' . $index; $this->queryType = 'CREATE INDEX'; $this->msgElements = array($this->fixQuote($wordArray[2]), $index); } elseif (strtoupper($wordArray[3]) == 'MODIFY' || strtoupper($wordArray[3]) == 'CHANGE') { $result = 'SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = ' . $this->fixQuote($wordArray[2]); $this->queryType = 'ALTER COLUMN COLUMN_NAME =' . $this->fixQuote($wordArray[4]); $this->msgElements = array($this->fixQuote($wordArray[2]), $this->fixQuote($wordArray[4])); } } if ($command == 'CREATE TABLE') { $table = $wordArray[5]; $result = 'SELECT * FROM sys.TABLES WHERE NAME = ' . $this->fixQuote($table); $this->queryType = 'CREATE_TABLE'; $this->msgElements = array($this->fixQuote($table)); } // Set fields based on results if ($this->checkQuery = $result) { // Unchecked status $this->checkStatus = 0; } else { // Skipped $this->checkStatus = -1; } } /** * Fix up integer. Fixes problem with MySQL integer descriptions. * If you change a column to "integer unsigned" it shows * as "int(10) unsigned" in the check query. * * @param string $type1 the column type * @param string $type2 the column attributes * * @return string The original or changed column type. * * @since 2.5 */ private function fixInteger($type1, $type2) { $result = $type1; if (strtolower($type1) == 'integer' && strtolower(substr($type2, 0, 8)) == 'unsigned') { $result = 'int'; } return $result; } /** * Fixes up a string for inclusion in a query. * Replaces name quote character with normal quote for literal. * Drops trailing semi-colon. Injects the database prefix. * * @param string $string The input string to be cleaned up. * * @return string The modified string. * * @since 2.5 */ private function fixQuote($string) { $string = str_replace('`', '', $string); $string = str_replace(';', '', $string); $string = str_replace('#__', $this->db->getPrefix(), $string); return $this->db->quote($string); } }