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MysqlChangeItem.php 0000644 00000030745 15234474541 0010331 0 ustar 00 <?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2011 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\Schema\ChangeItem;
defined('JPATH_PLATFORM') or die;
use Joomla\CMS\Schema\ChangeItem;
/**
* Checks the database schema against one MySQL DDL query to see if it has been run.
*
* @since 2.5
*/
class MysqlChangeItem extends ChangeItem
{
/**
* Checks a DDL query to see if it is a known type
* If yes, build a check query to see if the DDL has been run on the database.
* If successful, the $msgElements, $queryType, $checkStatus and $checkQuery fields are populated.
* The $msgElements contains the text to create the user message.
* The $checkQuery contains the SQL query to check whether the schema change has
* been run against the current database. The $queryType contains the type of
* DDL query that was run (for example, CREATE_TABLE, ADD_COLUMN, CHANGE_COLUMN_TYPE, ADD_INDEX).
* The $checkStatus field is set to zero if the query is created
*
* If not successful, $checkQuery is empty and , and $checkStatus is -1.
* For example, this will happen if the current line is a non-DDL statement.
*
* @return void
*
* @since 2.5
*/
protected function buildCheckQuery()
{
// Initialize fields in case we can't create a check query
$this->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);
$wordArray = preg_split("~'[^']*'(*SKIP)(*F)|\s+~u", trim($updateQuery, "; \t\n\r\0\x0B"));
// 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] . ' ' . $wordArray[1]);
// Check for special update statement to reset utf8mb4 conversion status
if (($command === 'UPDATE `#__UTF8_CONVERSION`'
|| $command === 'UPDATE #__UTF8_CONVERSION')
&& strtoupper($wordArray[2]) === 'SET'
&& strtolower(substr(str_replace('`', '', $wordArray[3]), 0, 9)) === 'converted')
{
// Statement is special statement to reset conversion status
$this->queryType = 'UTF8CNV';
// Done with method
return;
}
if ($command === 'ALTER TABLE')
{
$alterCommand = strtoupper($wordArray[3] . ' ' . $wordArray[4]);
if ($alterCommand === 'ADD COLUMN')
{
$result = 'SHOW COLUMNS IN ' . $wordArray[2] . ' WHERE field = ' . $this->fixQuote($wordArray[5]);
$this->queryType = 'ADD_COLUMN';
$this->msgElements = array($this->fixQuote($wordArray[2]), $this->fixQuote($wordArray[5]));
}
elseif ($alterCommand === 'ADD INDEX' || $alterCommand === 'ADD KEY')
{
if ($pos = strpos($wordArray[5], '('))
{
$index = $this->fixQuote(substr($wordArray[5], 0, $pos));
}
else
{
$index = $this->fixQuote($wordArray[5]);
}
$result = 'SHOW INDEXES IN ' . $wordArray[2] . ' WHERE Key_name = ' . $index;
$this->queryType = 'ADD_INDEX';
$this->msgElements = array($this->fixQuote($wordArray[2]), $index);
}
elseif ($alterCommand === 'ADD UNIQUE')
{
$idxIndexName = 5;
if (isset($wordArray[6]))
{
$addCmdCheck = strtoupper($wordArray[5]);
if ($addCmdCheck === 'INDEX' || $addCmdCheck === 'KEY')
{
$idxIndexName = 6;
}
}
if ($pos = strpos($wordArray[$idxIndexName], '('))
{
$index = $this->fixQuote(substr($wordArray[$idxIndexName], 0, $pos));
}
else
{
$index = $this->fixQuote($wordArray[$idxIndexName]);
}
$result = 'SHOW INDEXES IN ' . $wordArray[2] . ' WHERE Key_name = ' . $index;
$this->queryType = 'ADD_INDEX';
$this->msgElements = array($this->fixQuote($wordArray[2]), $index);
}
elseif ($alterCommand === 'DROP INDEX' || $alterCommand === 'DROP KEY')
{
$index = $this->fixQuote($wordArray[5]);
$result = 'SHOW INDEXES IN ' . $wordArray[2] . ' WHERE Key_name = ' . $index;
$this->queryType = 'DROP_INDEX';
$this->checkQueryExpected = 0;
$this->msgElements = array($this->fixQuote($wordArray[2]), $index);
}
elseif ($alterCommand === 'DROP COLUMN')
{
$index = $this->fixQuote($wordArray[5]);
$result = 'SHOW COLUMNS IN ' . $wordArray[2] . ' WHERE Field = ' . $index;
$this->queryType = 'DROP_COLUMN';
$this->checkQueryExpected = 0;
$this->msgElements = array($this->fixQuote($wordArray[2]), $index);
}
elseif (strtoupper($wordArray[3]) === 'MODIFY')
{
// Kludge to fix problem with "integer unsigned"
$type = $wordArray[5];
if (isset($wordArray[6]))
{
$type = $this->fixInteger($wordArray[5], $wordArray[6]);
}
// Detect changes in NULL and in DEFAULT column attributes
$changesArray = array_slice($wordArray, 6);
$defaultCheck = $this->checkDefault($changesArray, $type);
$nullCheck = $this->checkNull($changesArray);
/**
* When we made the UTF8MB4 conversion then text becomes medium text - so loosen the checks to these two types
* otherwise (for example) the profile fields profile_value check fails - see https://github.com/joomla/joomla-cms/issues/9258
*/
$typeCheck = $this->fixUtf8mb4TypeChecks($type);
$result = 'SHOW COLUMNS IN ' . $wordArray[2] . ' WHERE field = ' . $this->fixQuote($wordArray[4])
. ' AND ' . $typeCheck
. ($defaultCheck ? ' AND ' . $defaultCheck : '')
. ($nullCheck ? ' AND ' . $nullCheck : '');
$this->queryType = 'CHANGE_COLUMN_TYPE';
$this->msgElements = array($this->fixQuote($wordArray[2]), $this->fixQuote($wordArray[4]), $type);
}
elseif (strtoupper($wordArray[3]) === 'CHANGE')
{
// Kludge to fix problem with "integer unsigned"
$type = $wordArray[6];
if (isset($wordArray[7]))
{
$type = $this->fixInteger($wordArray[6], $wordArray[7]);
}
// Detect changes in NULL and in DEFAULT column attributes
$changesArray = array_slice($wordArray, 6);
$defaultCheck = $this->checkDefault($changesArray, $type);
$nullCheck = $this->checkNull($changesArray);
/**
* When we made the UTF8MB4 conversion then text becomes medium text - so loosen the checks to these two types
* otherwise (for example) the profile fields profile_value check fails - see https://github.com/joomla/joomla-cms/issues/9258
*/
$typeCheck = $this->fixUtf8mb4TypeChecks($type);
$result = 'SHOW COLUMNS IN ' . $wordArray[2] . ' WHERE field = ' . $this->fixQuote($wordArray[5])
. ' AND ' . $typeCheck
. ($defaultCheck ? ' AND ' . $defaultCheck : '')
. ($nullCheck ? ' AND ' . $nullCheck : '');
$this->queryType = 'CHANGE_COLUMN_TYPE';
$this->msgElements = array($this->fixQuote($wordArray[2]), $this->fixQuote($wordArray[5]), $type);
}
}
if ($command === 'CREATE TABLE')
{
if (strtoupper($wordArray[2] . $wordArray[3] . $wordArray[4]) === 'IFNOTEXISTS')
{
$table = $wordArray[5];
}
else
{
$table = $wordArray[2];
}
$result = 'SHOW TABLES LIKE ' . $this->fixQuote($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.
* On MySQL 8 display length is not shown anymore.
* This means we have to match e.g. both "int(10) unsigned" and
* "int unsigned", or both "int(11)" and "int" and so on.
* The same applies to the other integer data types "tinyint",
* "smallint", "mediumint" and "bigint".
*
* @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 (preg_match('/^(?P<type>(big|medium|small|tiny)?int)(\([0-9]+\))?$/i', $type1, $matches))
{
$result = strtolower($matches['type']);
}
if (strtolower(substr($type2, 0, 8)) === 'unsigned')
{
$result .= ' unsigned';
}
return $result;
}
/**
* Fixes up a string for inclusion in a query.
* Replaces name quote character with normal quote for literal.
* Drops trailing semicolon. 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);
}
/**
* Make check query for column changes/modifications tolerant
* for automatic type changes of text columns, e.g. from TEXT
* to MEDIUMTEXT, after conversion from utf8 to utf8mb4, and
* fix integer columns without display length for MySQL 8
* (see also function "fixInteger" above).
*
* @param string $type The column type found in the update query
*
* @return string The condition for type check in the check query
*
* @since 3.5
*/
private function fixUtf8mb4TypeChecks($type)
{
$uType = strtoupper(str_replace(';', '', $type));
switch ($uType)
{
case 'BIGINT UNSIGNED':
case 'INT UNSIGNED':
case 'MEDIUMINT UNSIGNED':
case 'SMALLINT UNSIGNED':
case 'TINYINT UNSIGNED':
// Eg for "INT": "UPPER(type) REGEXP '^INT([(][0-9]+[)])? UNSIGNED$'"
$typeCheck = 'UPPER(type) REGEXP ' . $this->db->quote('^' . str_replace(' ', '([(][0-9]+[)])? ', $uType) . '$');
break;
case 'BIGINT':
case 'INT':
case 'MEDIUMINT':
case 'SMALLINT':
case 'TINYINT':
// Eg for "INT": "UPPER(type) REGEXP '^INT([(][0-9]+[)])?$'"
$typeCheck = 'UPPER(type) REGEXP ' . $this->db->quote('^' . $uType . '([(][0-9]+[)])?$');
break;
case 'MEDIUMTEXT':
$typeCheck = $this->db->hasUTF8mb4Support()
? 'UPPER(type) IN (' . $this->db->quote('MEDIUMTEXT') . ',' . $this->db->quote('LONGTEXT') . ')'
: 'UPPER(type) = ' . $this->db->quote('MEDIUMTEXT');
break;
case 'TEXT':
$typeCheck = $this->db->hasUTF8mb4Support()
? 'UPPER(type) IN (' . $this->db->quote('TEXT') . ',' . $this->db->quote('MEDIUMTEXT') . ')'
: 'UPPER(type) = ' . $this->db->quote('TEXT');
break;
case 'TINYTEXT':
$typeCheck = $this->db->hasUTF8mb4Support()
? 'UPPER(type) IN (' . $this->db->quote('TINYTEXT') . ',' . $this->db->quote('TEXT') . ')'
: 'UPPER(type) = ' . $this->db->quote('TINYTEXT');
break;
default:
$typeCheck = 'UPPER(type) = ' . $this->db->quote($uType);
}
return $typeCheck;
}
/**
* Create query clause for column changes/modifications for NULL attribute
*
* @param array $changesArray The array of words after COLUMN name
*
* @return string The query clause for NULL check in the check query
*
* @since 3.8.6
*/
private function checkNull($changesArray)
{
// Find NULL keyword
$index = array_search('null', array_map('strtolower', $changesArray));
// Create the check
if ($index !== false)
{
if ($index == 0 || strtolower($changesArray[$index - 1]) !== 'not')
{
return ' `null` = ' . $this->db->quote('YES');
}
else
{
return ' `null` = ' . $this->db->quote('NO');
}
}
return false;
}
/**
* Create query clause for column changes/modifications for DEFAULT attribute
*
* @param array $changesArray The array of words after COLUMN name
* @param string $type The type of the COLUMN
*
* @return string The query clause for DEFAULT check in the check query
*
* @since 3.8.6
*/
private function checkDefault($changesArray, $type)
{
// Skip types that do not support default values
$type = strtolower($type);
if (substr($type, -4) === 'text' || substr($type, -4) === 'blob')
{
return false;
}
// Find DEFAULT keyword
$index = array_search('default', array_map('strtolower', $changesArray));
// Create the check
if ($index !== false)
{
if (strtolower($changesArray[$index + 1]) === 'null')
{
return ' `default` IS NULL';
}
else
{
return ' `default` = ' . $changesArray[$index + 1];
}
}
return false;
}
}
PostgresqlChangeItem.php 0000644 00000024243 15234474541 0011363 0 ustar 00 <?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2012 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\Schema\ChangeItem;
defined('JPATH_PLATFORM') or die;
use Joomla\CMS\Schema\ChangeItem;
/**
* Checks the database schema against one PostgreSQL DDL query to see if it has been run.
*
* @since 3.0
*/
class PostgresqlChangeItem extends ChangeItem
{
/**
* Checks a DDL query to see if it is a known type
* If yes, build a check query to see if the DDL has been run on the database.
* If successful, the $msgElements, $queryType, $checkStatus and $checkQuery fields are populated.
* The $msgElements contains the text to create the user message.
* The $checkQuery contains the SQL query to check whether the schema change has
* been run against the current database. The $queryType contains the type of
* DDL query that was run (for example, CREATE_TABLE, ADD_COLUMN, CHANGE_COLUMN_TYPE, ADD_INDEX).
* The $checkStatus field is set to zero if the query is created
*
* If not successful, $checkQuery is empty and , and $checkStatus is -1.
* For example, this will happen if the current line is a non-DDL statement.
*
* @return void
*
* @since 3.0
*/
protected function buildCheckQuery()
{
// Initialize fields in case we can't create a check query
$this->checkStatus = -1; // change status to skipped
$result = null;
$splitIntoWords = "~'[^']*'(*SKIP)(*F)|\s+~";
$splitIntoActions = "~'[^']*'(*SKIP)(*F)|\([^)]*\)(*SKIP)(*F)|,~";
// Remove any newlines
$this->updateQuery = str_replace("\n", '', $this->updateQuery);
// Remove trailing whitespace and semicolon
$this->updateQuery = rtrim($this->updateQuery, "; \t\n\r\0\x0B");
// 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);
$wordArray = preg_split($splitIntoWords, $updateQuery, -1, PREG_SPLIT_NO_EMPTY);
$totalWords = count($wordArray);
// 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 ($totalWords < 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')
{
// Check only the last action
$actions = ltrim(substr($updateQuery, strpos($updateQuery, $wordArray[2]) + strlen($wordArray[2])));
$actions = preg_split($splitIntoActions, $actions);
// Get the last action
$lastActionArray = preg_split($splitIntoWords, end($actions), -1, PREG_SPLIT_NO_EMPTY);
// Replace all actions by the last one
array_splice($wordArray, 3, $totalWords, $lastActionArray);
$alterCommand = strtoupper($wordArray[3] . ' ' . $wordArray[4]);
if ($alterCommand === 'ADD COLUMN')
{
$result = 'SELECT column_name'
. ' FROM information_schema.columns'
. ' WHERE table_name='
. $this->fixQuote($wordArray[2])
. ' AND column_name=' . $this->fixQuote($wordArray[5]);
$this->queryType = 'ADD_COLUMN';
$this->msgElements = array(
$this->fixQuote($wordArray[2]),
$this->fixQuote($wordArray[5])
);
}
elseif ($alterCommand === 'DROP COLUMN')
{
$result = 'SELECT column_name'
. ' FROM information_schema.columns'
. ' WHERE table_name='
. $this->fixQuote($wordArray[2])
. ' AND column_name=' . $this->fixQuote($wordArray[5]);
$this->queryType = 'DROP_COLUMN';
$this->checkQueryExpected = 0;
$this->msgElements = array(
$this->fixQuote($wordArray[2]),
$this->fixQuote($wordArray[5])
);
}
elseif ($alterCommand === 'ALTER COLUMN')
{
$alterAction = strtoupper($wordArray[6]);
if ($alterAction === 'TYPE')
{
$type = implode(' ', array_slice($wordArray, 7));
if ($pos = stripos($type, ' USING '))
{
$type = substr($type, 0, $pos);
}
if ($pos = strpos($type, '('))
{
$datatype = substr($type, 0, $pos);
}
else
{
$datatype = $type;
}
$result = 'SELECT column_name, data_type '
. 'FROM information_schema.columns WHERE table_name='
. $this->fixQuote($wordArray[2]) . ' AND column_name='
. $this->fixQuote($wordArray[5])
. ' AND data_type=' . $this->fixQuote($datatype);
if ($datatype === 'character varying')
{
$result .= ' AND character_maximum_length = ' . (int) substr($type, $pos + 1);
}
$this->queryType = 'CHANGE_COLUMN_TYPE';
$this->msgElements = array(
$this->fixQuote($wordArray[2]),
$this->fixQuote($wordArray[5]),
$type
);
}
elseif ($alterAction === 'SET')
{
$alterType = strtoupper($wordArray[7]);
if ($alterType === 'NOT' && strtoupper($wordArray[8]) === 'NULL')
{
$result = 'SELECT column_name, data_type, is_nullable'
. ' FROM information_schema.columns'
. ' WHERE table_name=' . $this->fixQuote($wordArray[2])
. ' AND column_name=' . $this->fixQuote($wordArray[5])
. ' AND is_nullable=' . $this->fixQuote('NO');
$this->queryType = 'CHANGE_COLUMN_TYPE';
$this->msgElements = array(
$this->fixQuote($wordArray[2]),
$this->fixQuote($wordArray[5]),
'NOT NULL'
);
}
elseif ($alterType === 'DEFAULT')
{
$result = 'SELECT column_name, data_type, is_nullable'
. ' FROM information_schema.columns'
. ' WHERE table_name=' . $this->fixQuote($wordArray[2])
. ' AND column_name=' . $this->fixQuote($wordArray[5])
. ' AND (CASE (position(' . $this->db->quote('::') . ' in column_default))'
. ' WHEN 0 THEN '
. ' column_default = ' . $this->db->quote($wordArray[8])
. ' ELSE '
. ' substring(column_default, 1, (position(' . $this->db->quote('::')
. ' in column_default) -1)) = ' . $this->db->quote($wordArray[8])
. ' END)';
$this->queryType = 'CHANGE_COLUMN_TYPE';
$this->msgElements = array(
$this->fixQuote($wordArray[2]),
$this->fixQuote($wordArray[5]),
'DEFAULT ' . $wordArray[8]
);
}
}
elseif ($alterAction === 'DROP')
{
$alterType = strtoupper($wordArray[7]);
if ($alterType === 'DEFAULT')
{
$result = 'SELECT column_name, data_type, is_nullable , column_default'
. ' FROM information_schema.columns'
. ' WHERE table_name=' . $this->fixQuote($wordArray[2])
. ' AND column_name=' . $this->fixQuote($wordArray[5])
. ' AND column_default IS NOT NULL';
$this->queryType = 'CHANGE_COLUMN_TYPE';
$this->checkQueryExpected = 0;
$this->msgElements = array(
$this->fixQuote($wordArray[2]),
$this->fixQuote($wordArray[5]),
'NOT DEFAULT'
);
}
elseif ($alterType === 'NOT' && strtoupper($wordArray[8]) === 'NULL')
{
$result = 'SELECT column_name, data_type, is_nullable , column_default'
. ' FROM information_schema.columns'
. ' WHERE table_name=' . $this->fixQuote($wordArray[2])
. ' AND column_name=' . $this->fixQuote($wordArray[5])
. ' AND is_nullable = ' . $this->fixQuote('NO');
$this->queryType = 'CHANGE_COLUMN_TYPE';
$this->checkQueryExpected = 0;
$this->msgElements = array(
$this->fixQuote($wordArray[2]),
$this->fixQuote($wordArray[5]),
'NULL'
);
}
}
}
}
elseif ($command === 'DROP INDEX')
{
if (strtoupper($wordArray[2] . $wordArray[3]) === 'IFEXISTS')
{
$idx = $this->fixQuote($wordArray[4]);
}
else
{
$idx = $this->fixQuote($wordArray[2]);
}
$result = 'SELECT * FROM pg_indexes WHERE indexname=' . $idx;
$this->queryType = 'DROP_INDEX';
$this->checkQueryExpected = 0;
$this->msgElements = array($this->fixQuote($idx));
}
elseif ($command === 'CREATE INDEX' || (strtoupper($command . $wordArray[2]) === 'CREATE UNIQUE INDEX'))
{
if ($wordArray[1] === 'UNIQUE')
{
$idx = $this->fixQuote($wordArray[3]);
$table = $this->fixQuote($wordArray[5]);
}
else
{
$idx = $this->fixQuote($wordArray[2]);
$table = $this->fixQuote($wordArray[4]);
}
$result = 'SELECT * FROM pg_indexes WHERE indexname=' . $idx . ' AND tablename=' . $table;
$this->queryType = 'ADD_INDEX';
$this->checkQueryExpected = 1;
$this->msgElements = array($table, $idx);
}
if ($command === 'CREATE TABLE')
{
if (strtoupper($wordArray[2] . $wordArray[3] . $wordArray[4]) === 'IFNOTEXISTS')
{
$table = $this->fixQuote($wordArray[5]);
}
else
{
$table = $this->fixQuote($wordArray[2]);
}
$result = 'SELECT table_name FROM information_schema.tables WHERE table_name=' . $table;
$this->queryType = 'CREATE_TABLE';
$this->checkQueryExpected = 1;
$this->msgElements = array($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 PostgreSQL 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 $type2 the column attributes
*
* @return string The original or changed column type.
*
* @since 3.0
*/
private function fixInteger($type1, $type2)
{
$result = $type1;
if (strtolower($type1) === 'integer' && strtolower(substr($type2, 0, 8)) === 'unsigned')
{
$result = 'unsigned int(10)';
}
return $result;
}
/**
* Fixes up a string for inclusion in a query.
* Replaces name quote character with normal quote for literal.
* Drops trailing semicolon. Injects the database prefix.
*
* @param string $string The input string to be cleaned up.
*
* @return string The modified string.
*
* @since 3.0
*/
private function fixQuote($string)
{
$string = str_replace('"', '', $string);
$string = str_replace(';', '', $string);
$string = str_replace('#__', $this->db->getPrefix(), $string);
return $this->db->quote($string);
}
}
SqlsrvChangeItem.php 0000644 00000011554 15234474541 0010513 0 ustar 00 <?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2012 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\Schema\ChangeItem;
defined('JPATH_PLATFORM') or die;
use Joomla\CMS\Schema\ChangeItem;
/**
* Checks the database schema against one SQL Server DDL query to see if it has been run.
*
* @since 2.5
*/
class SqlsrvChangeItem extends ChangeItem
{
/**
* Checks a DDL query to see if it is a known type
* If yes, build a check query to see if the DDL has been run on the database.
* If successful, the $msgElements, $queryType, $checkStatus and $checkQuery fields are populated.
* The $msgElements contains the text to create the user message.
* The $checkQuery contains the SQL query to check whether the schema change has
* been run against the current database. The $queryType contains the type of
* DDL query that was run (for example, CREATE_TABLE, ADD_COLUMN, CHANGE_COLUMN_TYPE, ADD_INDEX).
* The $checkStatus field is set to zero if the query is created
*
* If not successful, $checkQuery is empty and , and $checkStatus is -1.
* For example, this will happen if the current line is a non-DDL statement.
*
* @return void
*
* @since 2.5
*/
protected function buildCheckQuery()
{
// Initialize fields in case we can't create a check query
$this->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[2];
$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 semicolon. 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('"', '', $string);
$string = str_replace(';', '', $string);
$string = str_replace('#__', $this->db->getPrefix(), $string);
return $this->db->quote($string);
}
}