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<?php
declare(strict_types=1);
namespace PhpMyAdmin;
use PhpMyAdmin\ConfigStorage\Features\BookmarkFeature;
use PhpMyAdmin\ConfigStorage\Relation;
use PhpMyAdmin\ConfigStorage\RelationCleanup;
use PhpMyAdmin\Dbal\ResultInterface;
use PhpMyAdmin\Display\Results as DisplayResults;
use PhpMyAdmin\Html\Generator;
use PhpMyAdmin\Html\MySQLDocumentation;
use PhpMyAdmin\Query\Generator as QueryGenerator;
use PhpMyAdmin\Query\Utilities;
use PhpMyAdmin\SqlParser\Statements\AlterStatement;
use PhpMyAdmin\SqlParser\Statements\DropStatement;
use PhpMyAdmin\SqlParser\Statements\SelectStatement;
use PhpMyAdmin\SqlParser\Utils\Query;
use PhpMyAdmin\Utils\ForeignKey;
use function __;
use function array_keys;
use function array_map;
use function bin2hex;
use function ceil;
use function count;
use function defined;
use function explode;
use function htmlspecialchars;
use function in_array;
use function is_array;
use function is_bool;
use function is_object;
use function session_start;
use function session_write_close;
use function sprintf;
use function str_contains;
use function str_replace;
use function ucwords;
/**
* Set of functions for the SQL executor
*/
class Sql
{
/** @var DatabaseInterface */
private $dbi;
/** @var Relation */
private $relation;
/** @var RelationCleanup */
private $relationCleanup;
/** @var Transformations */
private $transformations;
/** @var Operations */
private $operations;
/** @var Template */
private $template;
public function __construct(
DatabaseInterface $dbi,
Relation $relation,
RelationCleanup $relationCleanup,
Operations $operations,
Transformations $transformations,
Template $template
) {
$this->dbi = $dbi;
$this->relation = $relation;
$this->relationCleanup = $relationCleanup;
$this->operations = $operations;
$this->transformations = $transformations;
$this->template = $template;
}
/**
* Handle remembered sorting order, only for single table query
*
* @param string $db database name
* @param string $table table name
* @param array $analyzedSqlResults the analyzed query results
* @param string $fullSqlQuery SQL query
*/
private function handleSortOrder(
$db,
$table,
array &$analyzedSqlResults,
&$fullSqlQuery
): void {
$tableObject = new Table($table, $db);
if (empty($analyzedSqlResults['order'])) {
// Retrieving the name of the column we should sort after.
$sortCol = $tableObject->getUiProp(Table::PROP_SORTED_COLUMN);
if (empty($sortCol)) {
return;
}
// Remove the name of the table from the retrieved field name.
$sortCol = str_replace(
Util::backquote($table) . '.',
'',
$sortCol
);
// Create the new query.
$fullSqlQuery = Query::replaceClause(
$analyzedSqlResults['statement'],
$analyzedSqlResults['parser']->list,
'ORDER BY ' . $sortCol
);
// TODO: Avoid reparsing the query.
$analyzedSqlResults = Query::getAll($fullSqlQuery);
} else {
// Store the remembered table into session.
$tableObject->setUiProp(
Table::PROP_SORTED_COLUMN,
Query::getClause(
$analyzedSqlResults['statement'],
$analyzedSqlResults['parser']->list,
'ORDER BY'
)
);
}
}
/**
* Append limit clause to SQL query
*
* @param array $analyzedSqlResults the analyzed query results
*
* @return string limit clause appended SQL query
*/
private function getSqlWithLimitClause(array $analyzedSqlResults)
{
return Query::replaceClause(
$analyzedSqlResults['statement'],
$analyzedSqlResults['parser']->list,
'LIMIT ' . $_SESSION['tmpval']['pos'] . ', '
. $_SESSION['tmpval']['max_rows']
);
}
/**
* Verify whether the result set has columns from just one table
*
* @param array $fieldsMeta meta fields
*/
private function resultSetHasJustOneTable(array $fieldsMeta): bool
{
$justOneTable = true;
$prevTable = '';
foreach ($fieldsMeta as $oneFieldMeta) {
if ($oneFieldMeta->table != '' && $prevTable != '' && $oneFieldMeta->table != $prevTable) {
$justOneTable = false;
}
if ($oneFieldMeta->table == '') {
continue;
}
$prevTable = $oneFieldMeta->table;
}
return $justOneTable && $prevTable != '';
}
/**
* Verify whether the result set contains all the columns
* of at least one unique key
*
* @param string $db database name
* @param string $table table name
* @param array $fieldsMeta meta fields
*/
private function resultSetContainsUniqueKey(string $db, string $table, array $fieldsMeta): bool
{
$columns = $this->dbi->getColumns($db, $table);
$resultSetColumnNames = [];
foreach ($fieldsMeta as $oneMeta) {
$resultSetColumnNames[] = $oneMeta->name;
}
foreach (Index::getFromTable($table, $db) as $index) {
if (! $index->isUnique()) {
continue;
}
$indexColumns = $index->getColumns();
$numberFound = 0;
foreach (array_keys($indexColumns) as $indexColumnName) {
if (
! in_array($indexColumnName, $resultSetColumnNames)
&& in_array($indexColumnName, $columns)
&& ! str_contains($columns[$indexColumnName]['Extra'], 'INVISIBLE')
) {
continue;
}
$numberFound++;
}
if ($numberFound == count($indexColumns)) {
return true;
}
}
return false;
}
/**
* Get the HTML for relational column dropdown
* During grid edit, if we have a relational field, returns the html for the
* dropdown
*
* @param string $db current database
* @param string $table current table
* @param string $column current column
* @param string $currentValue current selected value
*
* @return string html for the dropdown
*/
public function getHtmlForRelationalColumnDropdown($db, $table, $column, $currentValue)
{
$foreigners = $this->relation->getForeigners($db, $table, $column);
$foreignData = $this->relation->getForeignData($foreigners, $column, false, '', '');
if ($foreignData['disp_row'] == null) {
//Handle the case when number of values
//is more than $cfg['ForeignKeyMaxLimit']
$urlParams = [
'db' => $db,
'table' => $table,
'field' => $column,
];
$dropdown = $this->template->render('sql/relational_column_dropdown', [
'current_value' => $_POST['curr_value'],
'params' => $urlParams,
]);
} else {
$dropdown = $this->relation->foreignDropdown(
$foreignData['disp_row'],
$foreignData['foreign_field'],
$foreignData['foreign_display'],
$currentValue,
$GLOBALS['cfg']['ForeignKeyMaxLimit']
);
$dropdown = '<select>' . $dropdown . '</select>';
}
return $dropdown;
}
/** @return array<string, int|array> */
private function getDetailedProfilingStats(array $profilingResults): array
{
$profiling = [
'total_time' => 0,
'states' => [],
'chart' => [],
'profile' => [],
];
foreach ($profilingResults as $oneResult) {
$status = ucwords($oneResult['Status']);
$profiling['total_time'] += $oneResult['Duration'];
$profiling['profile'][] = [
'status' => $status,
'duration' => Util::formatNumber($oneResult['Duration'], 3, 1),
'duration_raw' => $oneResult['Duration'],
];
if (! isset($profiling['states'][$status])) {
$profiling['states'][$status] = [
'total_time' => $oneResult['Duration'],
'calls' => 1,
];
$profiling['chart'][$status] = $oneResult['Duration'];
} else {
$profiling['states'][$status]['calls']++;
$profiling['chart'][$status] += $oneResult['Duration'];
}
}
return $profiling;
}
/**
* Get value of a column for a specific row (marked by $whereClause)
*/
public function getFullValuesForSetColumn(
string $db,
string $table,
string $column,
string $whereClause
): string {
$row = $this->dbi->fetchSingleRow(sprintf(
'SELECT `%s` FROM `%s`.`%s` WHERE %s',
$column,
$db,
$table,
$whereClause
));
if ($row === null) {
return '';
}
return $row[$column];
}
/**
* Get all the values for a enum column or set column in a table
*
* @param string $db current database
* @param string $table current table
* @param string $column current column
*
* @return array|null array containing the value list for the column, null on failure
*/
public function getValuesForColumn(string $db, string $table, string $column): ?array
{
$fieldInfoQuery = QueryGenerator::getColumnsSql($db, $table, $this->dbi->escapeString($column));
$fieldInfoResult = $this->dbi->fetchResult($fieldInfoQuery);
if (! isset($fieldInfoResult[0])) {
return null;
}
return Util::parseEnumSetValues($fieldInfoResult[0]['Type']);
}
/**
* Function to check whether to remember the sorting order or not
*
* @param array $analyzedSqlResults the analyzed query and other variables set
* after analyzing the query
*/
private function isRememberSortingOrder(array $analyzedSqlResults): bool
{
return isset($analyzedSqlResults['select_expr'], $analyzedSqlResults['select_tables'])
&& $GLOBALS['cfg']['RememberSorting']
&& ! ($analyzedSqlResults['is_count']
|| $analyzedSqlResults['is_export']
|| $analyzedSqlResults['is_func']
|| $analyzedSqlResults['is_analyse'])
&& $analyzedSqlResults['select_from']
&& (empty($analyzedSqlResults['select_expr'])
|| ((count($analyzedSqlResults['select_expr']) === 1)
&& ($analyzedSqlResults['select_expr'][0] === '*')))
&& count($analyzedSqlResults['select_tables']) === 1;
}
/**
* Function to check whether the LIMIT clause should be appended or not
*
* @param array $analyzedSqlResults the analyzed query and other variables set
* after analyzing the query
*/
private function isAppendLimitClause(array $analyzedSqlResults): bool
{
// Assigning LIMIT clause to an syntactically-wrong query
// is not needed. Also we would want to show the true query
// and the true error message to the query executor
return (isset($analyzedSqlResults['parser'])
&& count($analyzedSqlResults['parser']->errors) === 0)
&& ($_SESSION['tmpval']['max_rows'] !== 'all')
&& ! ($analyzedSqlResults['is_export']
|| $analyzedSqlResults['is_analyse'])
&& ($analyzedSqlResults['select_from']
|| $analyzedSqlResults['is_subquery'])
&& empty($analyzedSqlResults['limit']);
}
/**
* Function to check whether this query is for just browsing
*
* @param array<string, mixed> $analyzedSqlResults the analyzed query and other variables set
* after analyzing the query
* @param bool|null $findRealEnd whether the real end should be found
*/
public static function isJustBrowsing(array $analyzedSqlResults, ?bool $findRealEnd): bool
{
return ! $analyzedSqlResults['is_group']
&& ! $analyzedSqlResults['is_func']
&& empty($analyzedSqlResults['union'])
&& empty($analyzedSqlResults['distinct'])
&& $analyzedSqlResults['select_from']
&& (count($analyzedSqlResults['select_tables']) === 1)
&& (empty($analyzedSqlResults['statement']->where)
|| (count($analyzedSqlResults['statement']->where) === 1
&& $analyzedSqlResults['statement']->where[0]->expr === '1'))
&& empty($analyzedSqlResults['group'])
&& ! isset($findRealEnd)
&& ! $analyzedSqlResults['is_subquery']
&& ! $analyzedSqlResults['join']
&& empty($analyzedSqlResults['having']);
}
/**
* Function to check whether the related transformation information should be deleted
*
* @param array $analyzedSqlResults the analyzed query and other variables set
* after analyzing the query
*/
private function isDeleteTransformationInfo(array $analyzedSqlResults): bool
{
return ! empty($analyzedSqlResults['querytype'])
&& (($analyzedSqlResults['querytype'] === 'ALTER')
|| ($analyzedSqlResults['querytype'] === 'DROP'));
}
/**
* Function to check whether the user has rights to drop the database
*
* @param array $analyzedSqlResults the analyzed query and other variables set
* after analyzing the query
* @param bool $allowUserDropDatabase whether the user is allowed to drop db
* @param bool $isSuperUser whether this user is a superuser
*/
public function hasNoRightsToDropDatabase(
array $analyzedSqlResults,
$allowUserDropDatabase,
$isSuperUser
): bool {
return ! $allowUserDropDatabase
&& isset($analyzedSqlResults['drop_database'])
&& $analyzedSqlResults['drop_database']
&& ! $isSuperUser;
}
/**
* Function to set a column property
*
* @param Table $table Table instance
* @param string $requestIndex col_order|col_visib
*
* @return bool|Message
*/
public function setColumnProperty(Table $table, string $requestIndex)
{
$propertyValue = array_map('intval', explode(',', $_POST[$requestIndex]));
switch ($requestIndex) {
case 'col_order':
$propertyToSet = Table::PROP_COLUMN_ORDER;
break;
case 'col_visib':
$propertyToSet = Table::PROP_COLUMN_VISIB;
break;
default:
$propertyToSet = '';
}
return $table->setUiProp($propertyToSet, $propertyValue, $_POST['table_create_time'] ?? null);
}
/**
* Function to find the real end of rows
*
* @param string $db the current database
* @param string $table the current table
*
* @return mixed the number of rows if "retain" param is true, otherwise true
*/
public function findRealEndOfRows($db, $table)
{
$unlimNumRows = $this->dbi->getTable($db, $table)->countRecords(true);
$_SESSION['tmpval']['pos'] = $this->getStartPosToDisplayRow($unlimNumRows);
return $unlimNumRows;
}
/**
* Function to get the default sql query for browsing page
*
* @param string $db the current database
* @param string $table the current table
*
* @return string the default $sql_query for browse page
*/
public function getDefaultSqlQueryForBrowse($db, $table): string
{
$bookmark = Bookmark::get($this->dbi, $GLOBALS['cfg']['Server']['user'], $db, $table, 'label', false, true);
if ($bookmark !== null && $bookmark->getQuery() !== '') {
$GLOBALS['using_bookmark_message'] = Message::notice(
__('Using bookmark "%s" as default browse query.')
);
$GLOBALS['using_bookmark_message']->addParam($table);
$GLOBALS['using_bookmark_message']->addHtml(
MySQLDocumentation::showDocumentation('faq', 'faq6-22')
);
return $bookmark->getQuery();
}
$defaultOrderByClause = '';
if (
isset($GLOBALS['cfg']['TablePrimaryKeyOrder'])
&& ($GLOBALS['cfg']['TablePrimaryKeyOrder'] !== 'NONE')
) {
$primaryKey = null;
$primary = Index::getPrimary($table, $db);
if ($primary !== false) {
$primarycols = $primary->getColumns();
foreach ($primarycols as $col) {
$primaryKey = $col->getName();
break;
}
if ($primaryKey !== null) {
$defaultOrderByClause = ' ORDER BY '
. Util::backquote($table) . '.'
. Util::backquote($primaryKey) . ' '
. $GLOBALS['cfg']['TablePrimaryKeyOrder'];
}
}
}
return 'SELECT * FROM ' . Util::backquote($table) . $defaultOrderByClause;
}
/**
* Responds an error when an error happens when executing the query
*
* @param bool $isGotoFile whether goto file or not
* @param string $error error after executing the query
* @param string $fullSqlQuery full sql query
*/
private function handleQueryExecuteError($isGotoFile, $error, $fullSqlQuery): void
{
if ($isGotoFile) {
$message = Message::rawError($error);
$response = ResponseRenderer::getInstance();
$response->setRequestStatus(false);
$response->addJSON('message', $message);
} else {
Generator::mysqlDie($error, $fullSqlQuery, false);
}
exit;
}
/**
* Function to store the query as a bookmark
*
* @param string $db the current database
* @param string $bookmarkUser the bookmarking user
* @param string $sqlQueryForBookmark the query to be stored in bookmark
* @param string $bookmarkLabel bookmark label
* @param bool $bookmarkReplace whether to replace existing bookmarks
*/
public function storeTheQueryAsBookmark(
?BookmarkFeature $bookmarkFeature,
$db,
$bookmarkUser,
$sqlQueryForBookmark,
$bookmarkLabel,
bool $bookmarkReplace
): void {
$bfields = [
'bkm_database' => $db,
'bkm_user' => $bookmarkUser,
'bkm_sql_query' => $sqlQueryForBookmark,
'bkm_label' => $bookmarkLabel,
];
// Should we replace bookmark?
if ($bookmarkReplace && $bookmarkFeature !== null) {
$bookmarks = Bookmark::getList($bookmarkFeature, $this->dbi, $GLOBALS['cfg']['Server']['user'], $db);
foreach ($bookmarks as $bookmark) {
if ($bookmark->getLabel() != $bookmarkLabel) {
continue;
}
$bookmark->delete();
}
}
$bookmark = Bookmark::createBookmark(
$this->dbi,
$bfields,
isset($_POST['bkm_all_users'])
);
if ($bookmark === false) {
return;
}
$bookmark->save();
}
/**
* Function to get the affected or changed number of rows after executing a query
*
* @param bool $isAffected whether the query affected a table
* @param ResultInterface|false $result results of executing the query
*
* @return int|string number of rows affected or changed
* @psalm-return int|numeric-string
*/
private function getNumberOfRowsAffectedOrChanged($isAffected, $result)
{
if ($isAffected) {
return $this->dbi->affectedRows();
}
if ($result) {
return $result->numRows();
}
return 0;
}
/**
* Checks if the current database has changed
* This could happen if the user sends a query like "USE `database`;"
*
* @param string $db the database in the query
*
* @return bool whether to reload the navigation(1) or not(0)
*/
private function hasCurrentDbChanged(string $db): bool
{
if ($db === '') {
return false;
}
$currentDb = $this->dbi->fetchValue('SELECT DATABASE()');
// $current_db is false, except when a USE statement was sent
return ($currentDb != false) && ($db !== $currentDb);
}
/**
* If a table, database or column gets dropped, clean comments.
*
* @param string $db current database
* @param string $table current table
* @param string|null $column current column
* @param bool $purge whether purge set or not
*/
private function cleanupRelations(string $db, string $table, ?string $column, bool $purge): void
{
if (! $purge || $db === '') {
return;
}
if ($table !== '') {
if ($column !== null && $column !== '') {
$this->relationCleanup->column($db, $table, $column);
} else {
$this->relationCleanup->table($db, $table);
}
} else {
$this->relationCleanup->database($db);
}
}
/**
* Function to count the total number of rows for the same 'SELECT' query without
* the 'LIMIT' clause that may have been programmatically added
*
* @param int|string $numRows number of rows affected/changed by the query
* @param bool $justBrowsing whether just browsing or not
* @param string $db the current database
* @param string $table the current table
* @param array $analyzedSqlResults the analyzed query and other variables set after analyzing the query
* @psalm-param int|numeric-string $numRows
*
* @return int|string unlimited number of rows
* @psalm-return int|numeric-string
*/
private function countQueryResults(
$numRows,
bool $justBrowsing,
string $db,
string $table,
array $analyzedSqlResults
) {
/* Shortcut for not analyzed/empty query */
if ($analyzedSqlResults === []) {
return 0;
}
if (! $this->isAppendLimitClause($analyzedSqlResults)) {
// if we did not append a limit, set this to get a correct
// "Showing rows..." message
// $_SESSION['tmpval']['max_rows'] = 'all';
$unlimNumRows = $numRows;
} elseif ($_SESSION['tmpval']['max_rows'] > $numRows) {
// When user has not defined a limit in query and total rows in
// result are less than max_rows to display, there is no need
// to count total rows for that query again
$unlimNumRows = $_SESSION['tmpval']['pos'] + $numRows;
} elseif ($analyzedSqlResults['querytype'] === 'SELECT' || $analyzedSqlResults['is_subquery']) {
// c o u n t q u e r y
// If we are "just browsing", there is only one table (and no join),
// and no WHERE clause (or just 'WHERE 1 '),
// we do a quick count (which uses MaxExactCount) because
// SQL_CALC_FOUND_ROWS is not quick on large InnoDB tables
// However, do not count again if we did it previously
// due to $find_real_end == true
if ($justBrowsing) {
// Get row count (is approximate for InnoDB)
$unlimNumRows = $this->dbi->getTable($db, $table)->countRecords();
/**
* @todo Can we know at this point that this is InnoDB,
* (in this case there would be no need for getting
* an exact count)?
*/
if ($unlimNumRows < $GLOBALS['cfg']['MaxExactCount']) {
// Get the exact count if approximate count
// is less than MaxExactCount
/**
* @todo In countRecords(), MaxExactCount is also verified,
* so can we avoid checking it twice?
*/
$unlimNumRows = $this->dbi->getTable($db, $table)
->countRecords(true);
}
} else {
$statement = $analyzedSqlResults['statement'];
$tokenList = $analyzedSqlResults['parser']->list;
$replaces = [
// Remove ORDER BY to decrease unnecessary sorting time
[
'ORDER BY',
'',
],
// Removes LIMIT clause that might have been added
[
'LIMIT',
'',
],
];
$countQuery = 'SELECT COUNT(*) FROM (' . Query::replaceClauses(
$statement,
$tokenList,
$replaces
) . ') as cnt';
$unlimNumRows = $this->dbi->fetchValue($countQuery);
if ($unlimNumRows === false) {
$unlimNumRows = 0;
}
}
} else {// not $is_select
$unlimNumRows = 0;
}
return $unlimNumRows;
}
/**
* Function to handle all aspects relating to executing the query
*
* @param array $analyzedSqlResults analyzed sql results
* @param string $fullSqlQuery full sql query
* @param bool $isGotoFile whether to go to a file
* @param string $db current database
* @param string|null $table current table
* @param bool|null $findRealEnd whether to find the real end
* @param string|null $sqlQueryForBookmark sql query to be stored as bookmark
* @param array|null $extraData extra data
*
* @psalm-return array{
* ResultInterface|false|null,
* int|numeric-string,
* int|numeric-string,
* array<string, string>|null,
* array|null
* }
*/
private function executeTheQuery(
array $analyzedSqlResults,
$fullSqlQuery,
$isGotoFile,
string $db,
?string $table,
?bool $findRealEnd,
?string $sqlQueryForBookmark,
$extraData
): array {
$response = ResponseRenderer::getInstance();
$response->getHeader()->getMenu()->setTable($table ?? '');
// Only if we ask to see the php code
if (isset($GLOBALS['show_as_php'])) {
$result = null;
$numRows = 0;
$unlimNumRows = 0;
$profilingResults = null;
} else { // If we don't ask to see the php code
Profiling::enable($this->dbi);
if (! defined('TESTSUITE')) {
// close session in case the query takes too long
session_write_close();
}
$result = $this->dbi->tryQuery($fullSqlQuery);
$GLOBALS['querytime'] = $this->dbi->lastQueryExecutionTime;
if (! defined('TESTSUITE')) {
// reopen session
session_start();
}
// Displays an error message if required and stop parsing the script
$error = $this->dbi->getError();
if ($error && $GLOBALS['cfg']['IgnoreMultiSubmitErrors']) {
$extraData['error'] = $error;
} elseif ($error) {
$this->handleQueryExecuteError($isGotoFile, $error, $fullSqlQuery);
}
// If there are no errors and bookmarklabel was given,
// store the query as a bookmark
if (! empty($_POST['bkm_label']) && $sqlQueryForBookmark) {
$bookmarkFeature = $this->relation->getRelationParameters()->bookmarkFeature;
$this->storeTheQueryAsBookmark(
$bookmarkFeature,
$db,
$bookmarkFeature !== null ? $GLOBALS['cfg']['Server']['user'] : '',
$sqlQueryForBookmark,
$_POST['bkm_label'],
isset($_POST['bkm_replace'])
);
}
// Gets the number of rows affected/returned
// (This must be done immediately after the query because
// mysql_affected_rows() reports about the last query done)
$numRows = $this->getNumberOfRowsAffectedOrChanged($analyzedSqlResults['is_affected'], $result);
$profilingResults = Profiling::getInformation($this->dbi);
$justBrowsing = self::isJustBrowsing($analyzedSqlResults, $findRealEnd ?? null);
$unlimNumRows = $this->countQueryResults($numRows, $justBrowsing, $db, $table ?? '', $analyzedSqlResults);
$this->cleanupRelations($db, $table ?? '', $_POST['dropped_column'] ?? null, ! empty($_POST['purge']));
if (
isset($_POST['dropped_column'])
&& $db !== '' && $table !== null && $table !== ''
) {
// to refresh the list of indexes (Ajax mode)
$indexes = Index::getFromTable($table, $db);
$indexesDuplicates = Index::findDuplicates($table, $db);
$template = new Template();
$extraData['indexes_list'] = $template->render('indexes', [
'url_params' => $GLOBALS['urlParams'],
'indexes' => $indexes,
'indexes_duplicates' => $indexesDuplicates,
]);
}
}
return [
$result,
$numRows,
$unlimNumRows,
$profilingResults,
$extraData,
];
}
/**
* Delete related transformation information
*
* @param string $db current database
* @param string $table current table
* @param array $analyzedSqlResults analyzed sql results
*/
private function deleteTransformationInfo(string $db, string $table, array $analyzedSqlResults): void
{
if (! isset($analyzedSqlResults['statement'])) {
return;
}
$statement = $analyzedSqlResults['statement'];
if ($statement instanceof AlterStatement) {
if (
! empty($statement->altered[0])
&& $statement->altered[0]->options->has('DROP')
&& ! empty($statement->altered[0]->field->column)
) {
$this->transformations->clear($db, $table, $statement->altered[0]->field->column);
}
} elseif ($statement instanceof DropStatement) {
$this->transformations->clear($db, $table);
}
}
/**
* Function to get the message for the no rows returned case
*
* @param string|null $messageToShow message to show
* @param array $analyzedSqlResults analyzed sql results
* @param int|string $numRows number of rows
*/
private function getMessageForNoRowsReturned(
?string $messageToShow,
array $analyzedSqlResults,
$numRows
): Message {
if ($analyzedSqlResults['querytype'] === 'DELETE') {
$message = Message::getMessageForDeletedRows($numRows);
} elseif ($analyzedSqlResults['is_insert']) {
if ($analyzedSqlResults['querytype'] === 'REPLACE') {
// For REPLACE we get DELETED + INSERTED row count,
// so we have to call it affected
$message = Message::getMessageForAffectedRows($numRows);
} else {
$message = Message::getMessageForInsertedRows($numRows);
}
$insertId = $this->dbi->insertId();
if ($insertId !== 0) {
// insert_id is id of FIRST record inserted in one insert,
// so if we inserted multiple rows, we had to increment this
$message->addText('[br]');
// need to use a temporary because the Message class
// currently supports adding parameters only to the first
// message
$inserted = Message::notice(__('Inserted row id: %1$d'));
$inserted->addParam($insertId + $numRows - 1);
$message->addMessage($inserted);
}
} elseif ($analyzedSqlResults['is_affected']) {
$message = Message::getMessageForAffectedRows($numRows);
// Ok, here is an explanation for the !$is_select.
// The form generated by PhpMyAdmin\SqlQueryForm
// and /database/sql has many submit buttons
// on the same form, and some confusion arises from the
// fact that $message_to_show is sent for every case.
// The $message_to_show containing a success message and sent with
// the form should not have priority over errors
} elseif ($messageToShow && $analyzedSqlResults['querytype'] !== 'SELECT') {
$message = Message::rawSuccess(htmlspecialchars($messageToShow));
} elseif (! empty($GLOBALS['show_as_php'])) {
$message = Message::success(__('Showing as PHP code'));
} elseif (isset($GLOBALS['show_as_php'])) {
/* User disable showing as PHP, query is only displayed */
$message = Message::notice(__('Showing SQL query'));
} else {
$message = Message::success(
__('MySQL returned an empty result set (i.e. zero rows).')
);
}
if (isset($GLOBALS['querytime'])) {
$queryTime = Message::notice(
'(' . __('Query took %01.4f seconds.') . ')'
);
$queryTime->addParam($GLOBALS['querytime']);
$message->addMessage($queryTime);
}
// In case of ROLLBACK, notify the user.
if (isset($_POST['rollback_query'])) {
$message->addText(__('[ROLLBACK occurred.]'));
}
return $message;
}
/**
* Function to respond back when the query returns zero rows
* This method is called
* 1-> When browsing an empty table
* 2-> When executing a query on a non empty table which returns zero results
* 3-> When executing a query on an empty table
* 4-> When executing an INSERT, UPDATE, DELETE query from the SQL tab
* 5-> When deleting a row from BROWSE tab
* 6-> When searching using the SEARCH tab which returns zero results
* 7-> When changing the structure of the table except change operation
*
* @param array $analyzedSqlResults analyzed sql results
* @param string $db current database
* @param string|null $table current table
* @param string|null $messageToShow message to show
* @param int|string $numRows number of rows
* @param DisplayResults $displayResultsObject DisplayResult instance
* @param array|null $extraData extra data
* @param array|null $profilingResults profiling results
* @param ResultInterface|false|null $result executed query results
* @param string $sqlQuery sql query
* @param string|null $completeQuery complete sql query
* @psalm-param int|numeric-string $numRows
*
* @return string html
*/
private function getQueryResponseForNoResultsReturned(
array $analyzedSqlResults,
string $db,
?string $table,
?string $messageToShow,
$numRows,
$displayResultsObject,
?array $extraData,
?array $profilingResults,
$result,
$sqlQuery,
?string $completeQuery
): string {
if ($this->isDeleteTransformationInfo($analyzedSqlResults)) {
$this->deleteTransformationInfo($db, $table ?? '', $analyzedSqlResults);
}
if (isset($extraData['error'])) {
$message = Message::rawError($extraData['error']);
} else {
$message = $this->getMessageForNoRowsReturned($messageToShow, $analyzedSqlResults, $numRows);
}
$queryMessage = Generator::getMessage($message, $GLOBALS['sql_query'], 'success');
if (isset($GLOBALS['show_as_php'])) {
return $queryMessage;
}
if (! empty($GLOBALS['reload'])) {
$extraData['reload'] = 1;
$extraData['db'] = $GLOBALS['db'];
}
// For ajax requests add message and sql_query as JSON
if (empty($_REQUEST['ajax_page_request'])) {
$extraData['message'] = $message;
if ($GLOBALS['cfg']['ShowSQL']) {
$extraData['sql_query'] = $queryMessage;
}
}
$response = ResponseRenderer::getInstance();
$response->addJSON($extraData ?? []);
if (empty($analyzedSqlResults['is_select']) || isset($extraData['error'])) {
return $queryMessage;
}
$displayParts = [
'edit_lnk' => null,
'del_lnk' => null,
'sort_lnk' => '1',
'nav_bar' => '0',
'bkm_form' => '1',
'text_btn' => '1',
'pview_lnk' => '1',
];
$sqlQueryResultsTable = $this->getHtmlForSqlQueryResultsTable(
$displayResultsObject,
$displayParts,
false,
0,
$numRows,
null,
$result,
$analyzedSqlResults,
true
);
$profilingChart = '';
if ($profilingResults !== null) {
$header = $response->getHeader();
$scripts = $header->getScripts();
$scripts->addFile('sql.js');
$profiling = $this->getDetailedProfilingStats($profilingResults);
$profilingChart = $this->template->render('sql/profiling_chart', ['profiling' => $profiling]);
}
$bookmark = '';
$bookmarkFeature = $this->relation->getRelationParameters()->bookmarkFeature;
if (
$bookmarkFeature !== null
&& empty($_GET['id_bookmark'])
&& $sqlQuery
) {
$bookmark = $this->template->render('sql/bookmark', [
'db' => $db,
'goto' => Url::getFromRoute('/sql', [
'db' => $db,
'table' => $table,
'sql_query' => $sqlQuery,
'id_bookmark' => 1,
]),
'user' => $GLOBALS['cfg']['Server']['user'],
'sql_query' => $completeQuery ?? $sqlQuery,
]);
}
return $this->template->render('sql/no_results_returned', [
'message' => $queryMessage,
'sql_query_results_table' => $sqlQueryResultsTable,
'profiling_chart' => $profilingChart,
'bookmark' => $bookmark,
'db' => $db,
'table' => $table,
'sql_query' => $sqlQuery,
'is_procedure' => ! empty($analyzedSqlResults['procedure']),
]);
}
/**
* Function to send response for ajax grid edit
*
* @param ResultInterface $result result of the executed query
*/
private function getResponseForGridEdit(ResultInterface $result): void
{
$row = $result->fetchRow();
$fieldsMeta = $this->dbi->getFieldsMeta($result);
if (isset($fieldsMeta[0]) && $fieldsMeta[0]->isBinary()) {
$row[0] = bin2hex($row[0]);
}
$response = ResponseRenderer::getInstance();
$response->addJSON('value', $row[0]);
}
/**
* Returns a message for successful creation of a bookmark or null if a bookmark
* was not created
*/
private function getBookmarkCreatedMessage(): string
{
$output = '';
if (isset($_GET['label'])) {
$message = Message::success(
__('Bookmark %s has been created.')
);
$message->addParam($_GET['label']);
$output = $message->getDisplay();
}
return $output;
}
/**
* Function to get html for the sql query results table
*
* @param DisplayResults $displayResultsObject instance of DisplayResult
* @param array $displayParts the parts to display
* @param bool $editable whether the result table is
* editable or not
* @param int|string $unlimNumRows unlimited number of rows
* @param int|string $numRows number of rows
* @param array|null $showTable table definitions
* @param ResultInterface|false|null $result result of the executed query
* @param array $analyzedSqlResults analyzed sql results
* @param bool $isLimitedDisplay Show only limited operations or not
* @psalm-param int|numeric-string $unlimNumRows
* @psalm-param int|numeric-string $numRows
*/
private function getHtmlForSqlQueryResultsTable(
$displayResultsObject,
array $displayParts,
$editable,
$unlimNumRows,
$numRows,
?array $showTable,
$result,
array $analyzedSqlResults,
$isLimitedDisplay = false
): string {
$printView = isset($_POST['printview']) && $_POST['printview'] == '1' ? '1' : null;
$tableHtml = '';
$isBrowseDistinct = ! empty($_POST['is_browse_distinct']);
if ($analyzedSqlResults['is_procedure']) {
do {
if ($result === null) {
$result = $this->dbi->storeResult();
}
if ($result === false) {
$result = null;
continue;
}
$numRows = $result->numRows();
if ($numRows > 0) {
$fieldsMeta = $this->dbi->getFieldsMeta($result);
$fieldsCount = count($fieldsMeta);
$displayResultsObject->setProperties(
$numRows,
$fieldsMeta,
$analyzedSqlResults['is_count'],
$analyzedSqlResults['is_export'],
$analyzedSqlResults['is_func'],
$analyzedSqlResults['is_analyse'],
$numRows,
$fieldsCount,
$GLOBALS['querytime'],
$GLOBALS['text_dir'],
$analyzedSqlResults['is_maint'],
$analyzedSqlResults['is_explain'],
$analyzedSqlResults['is_show'],
$showTable,
$printView,
$editable,
$isBrowseDistinct
);
$displayParts = [
'edit_lnk' => $displayResultsObject::NO_EDIT_OR_DELETE,
'del_lnk' => $displayResultsObject::NO_EDIT_OR_DELETE,
'sort_lnk' => '1',
'nav_bar' => '1',
'bkm_form' => '1',
'text_btn' => '1',
'pview_lnk' => '1',
];
$tableHtml .= $displayResultsObject->getTable(
$result,
$displayParts,
$analyzedSqlResults,
$isLimitedDisplay
);
}
$result = null;
} while ($this->dbi->moreResults() && $this->dbi->nextResult());
} else {
$fieldsMeta = [];
if (isset($result) && ! is_bool($result)) {
$fieldsMeta = $this->dbi->getFieldsMeta($result);
}
$fieldsCount = count($fieldsMeta);
$_SESSION['is_multi_query'] = false;
$displayResultsObject->setProperties(
$unlimNumRows,
$fieldsMeta,
$analyzedSqlResults['is_count'],
$analyzedSqlResults['is_export'],
$analyzedSqlResults['is_func'],
$analyzedSqlResults['is_analyse'],
$numRows,
$fieldsCount,
$GLOBALS['querytime'],
$GLOBALS['text_dir'],
$analyzedSqlResults['is_maint'],
$analyzedSqlResults['is_explain'],
$analyzedSqlResults['is_show'],
$showTable,
$printView,
$editable,
$isBrowseDistinct
);
if (! is_bool($result)) {
$tableHtml .= $displayResultsObject->getTable(
$result,
$displayParts,
$analyzedSqlResults,
$isLimitedDisplay
);
}
}
return $tableHtml;
}
/**
* Function to get html for the previous query if there is such.
*
* @param string|null $displayQuery display query
* @param bool $showSql whether to show sql
* @param array $sqlData sql data
* @param Message|string $displayMessage display message
*/
private function getHtmlForPreviousUpdateQuery(
?string $displayQuery,
bool $showSql,
array $sqlData,
$displayMessage
): string {
$output = '';
if ($displayQuery !== null && $showSql && $sqlData === []) {
$output = Generator::getMessage($displayMessage, $displayQuery, 'success');
}
return $output;
}
/**
* To get the message if a column index is missing. If not will return null
*
* @param string|null $table current table
* @param string $database current database
* @param bool $editable whether the results table can be editable or not
* @param bool $hasUniqueKey whether there is a unique key
*/
private function getMessageIfMissingColumnIndex(
?string $table,
string $database,
bool $editable,
bool $hasUniqueKey
): string {
if ($table === null) {
return '';
}
$output = '';
if (Utilities::isSystemSchema($database) || ! $editable) {
$output = Message::notice(
sprintf(
__(
'Current selection does not contain a unique column.'
. ' Grid edit, checkbox, Edit, Copy and Delete features'
. ' are not available. %s'
),
MySQLDocumentation::showDocumentation(
'config',
'cfg_RowActionLinksWithoutUnique'
)
)
)->getDisplay();
} elseif (! $hasUniqueKey) {
$output = Message::notice(
sprintf(
__(
'Current selection does not contain a unique column.'
. ' Grid edit, Edit, Copy and Delete features may result in'
. ' undesired behavior. %s'
),
MySQLDocumentation::showDocumentation(
'config',
'cfg_RowActionLinksWithoutUnique'
)
)
)->getDisplay();
}
return $output;
}
/**
* Function to display results when the executed query returns non empty results
*
* @param ResultInterface|false|null $result executed query results
* @param array $analyzedSqlResults analysed sql results
* @param string $db current database
* @param string|null $table current table
* @param array|null $sqlData sql data
* @param DisplayResults $displayResultsObject Instance of DisplayResults
* @param int|string $unlimNumRows unlimited number of rows
* @param int|string $numRows number of rows
* @param string|null $dispQuery display query
* @param Message|string|null $dispMessage display message
* @param array|null $profilingResults profiling results
* @param string $sqlQuery sql query
* @param string|null $completeQuery complete sql query
* @psalm-param int|numeric-string $unlimNumRows
* @psalm-param int|numeric-string $numRows
*
* @return string html
*/
private function getQueryResponseForResultsReturned(
$result,
array $analyzedSqlResults,
string $db,
?string $table,
?array $sqlData,
$displayResultsObject,
$unlimNumRows,
$numRows,
?string $dispQuery,
$dispMessage,
?array $profilingResults,
$sqlQuery,
?string $completeQuery
): string {
global $showtable;
// If we are retrieving the full value of a truncated field or the original
// value of a transformed field, show it here
if (isset($_POST['grid_edit']) && $_POST['grid_edit'] == true && is_object($result)) {
$this->getResponseForGridEdit($result);
exit;
}
// Gets the list of fields properties
$fieldsMeta = [];
if ($result !== null && ! is_bool($result)) {
$fieldsMeta = $this->dbi->getFieldsMeta($result);
}
// Should be initialized these parameters before parsing
if (! is_array($showtable)) {
$showtable = null;
}
$response = ResponseRenderer::getInstance();
$header = $response->getHeader();
$scripts = $header->getScripts();
$justOneTable = $this->resultSetHasJustOneTable($fieldsMeta);
// hide edit and delete links:
// - for information_schema
// - if the result set does not contain all the columns of a unique key
// (unless this is an updatable view)
// - if the SELECT query contains a join or a subquery
$updatableView = false;
$statement = $analyzedSqlResults['statement'] ?? null;
if ($statement instanceof SelectStatement) {
if ($statement->expr && $statement->expr[0]->expr === '*' && $table) {
$_table = new Table($table, $db);
$updatableView = $_table->isUpdatableView();
}
if (
$analyzedSqlResults['join']
|| $analyzedSqlResults['is_subquery']
|| count($analyzedSqlResults['select_tables']) !== 1
) {
$justOneTable = false;
}
}
$hasUnique = $table !== null && $this->resultSetContainsUniqueKey($db, $table, $fieldsMeta);
$editable = ($hasUnique
|| $GLOBALS['cfg']['RowActionLinksWithoutUnique']
|| $updatableView)
&& $justOneTable
&& ! Utilities::isSystemSchema($db);
$_SESSION['tmpval']['possible_as_geometry'] = $editable;
$displayParts = [
'edit_lnk' => $displayResultsObject::UPDATE_ROW,
'del_lnk' => $displayResultsObject::DELETE_ROW,
'sort_lnk' => '1',
'nav_bar' => '1',
'bkm_form' => '1',
'text_btn' => '0',
'pview_lnk' => '1',
];
if (! $editable) {
$displayParts = [
'edit_lnk' => $displayResultsObject::NO_EDIT_OR_DELETE,
'del_lnk' => $displayResultsObject::NO_EDIT_OR_DELETE,
'sort_lnk' => '1',
'nav_bar' => '1',
'bkm_form' => '1',
'text_btn' => '1',
'pview_lnk' => '1',
];
}
if (isset($_POST['printview']) && $_POST['printview'] == '1') {
$displayParts = [
'edit_lnk' => $displayResultsObject::NO_EDIT_OR_DELETE,
'del_lnk' => $displayResultsObject::NO_EDIT_OR_DELETE,
'sort_lnk' => '0',
'nav_bar' => '0',
'bkm_form' => '0',
'text_btn' => '0',
'pview_lnk' => '0',
];
}
if (! isset($_POST['printview']) || $_POST['printview'] != '1') {
$scripts->addFile('makegrid.js');
$scripts->addFile('sql.js');
unset($GLOBALS['message']);
//we don't need to buffer the output in getMessage here.
//set a global variable and check against it in the function
$GLOBALS['buffer_message'] = false;
}
$previousUpdateQueryHtml = $this->getHtmlForPreviousUpdateQuery(
$dispQuery,
(bool) $GLOBALS['cfg']['ShowSQL'],
$sqlData ?? [],
$dispMessage ?? ''
);
$profilingChartHtml = '';
if ($profilingResults) {
$profiling = $this->getDetailedProfilingStats($profilingResults);
$profilingChartHtml = $this->template->render('sql/profiling_chart', ['profiling' => $profiling]);
}
$missingUniqueColumnMessage = $this->getMessageIfMissingColumnIndex($table, $db, $editable, $hasUnique);
$bookmarkCreatedMessage = $this->getBookmarkCreatedMessage();
$tableHtml = $this->getHtmlForSqlQueryResultsTable(
$displayResultsObject,
$displayParts,
$editable,
$unlimNumRows,
$numRows,
$showtable,
$result,
$analyzedSqlResults
);
$bookmarkSupportHtml = '';
$bookmarkFeature = $this->relation->getRelationParameters()->bookmarkFeature;
if (
$bookmarkFeature !== null
&& $displayParts['bkm_form'] == '1'
&& empty($_GET['id_bookmark'])
&& $sqlQuery
) {
$bookmarkSupportHtml = $this->template->render('sql/bookmark', [
'db' => $db,
'goto' => Url::getFromRoute('/sql', [
'db' => $db,
'table' => $table,
'sql_query' => $sqlQuery,
'id_bookmark' => 1,
]),
'user' => $GLOBALS['cfg']['Server']['user'],
'sql_query' => $completeQuery ?? $sqlQuery,
]);
}
return $this->template->render('sql/sql_query_results', [
'previous_update_query' => $previousUpdateQueryHtml,
'profiling_chart' => $profilingChartHtml,
'missing_unique_column_message' => $missingUniqueColumnMessage,
'bookmark_created_message' => $bookmarkCreatedMessage,
'table' => $tableHtml,
'bookmark_support' => $bookmarkSupportHtml,
]);
}
/**
* Function to execute the query and send the response
*
* @param array|null $analyzedSqlResults analysed sql results
* @param bool $isGotoFile whether goto file or not
* @param string $db current database
* @param string|null $table current table
* @param bool|null $findRealEnd whether to find real end or not
* @param string|null $sqlQueryForBookmark the sql query to be stored as bookmark
* @param array|null $extraData extra data
* @param string|null $messageToShow message to show
* @param array|null $sqlData sql data
* @param string $goto goto page url
* @param string|null $dispQuery display query
* @param Message|string|null $dispMessage display message
* @param string $sqlQuery sql query
* @param string|null $completeQuery complete query
*/
public function executeQueryAndSendQueryResponse(
$analyzedSqlResults,
$isGotoFile,
string $db,
?string $table,
$findRealEnd,
$sqlQueryForBookmark,
$extraData,
$messageToShow,
$sqlData,
$goto,
$dispQuery,
$dispMessage,
$sqlQuery,
$completeQuery
): string {
if ($analyzedSqlResults == null) {
// Parse and analyze the query
[
$analyzedSqlResults,
$db,
$tableFromSql,
] = ParseAnalyze::sqlQuery($sqlQuery, $db);
$table = $tableFromSql ?: $table;
}
return $this->executeQueryAndGetQueryResponse(
$analyzedSqlResults, // analyzed_sql_results
$isGotoFile, // is_gotofile
$db, // db
$table, // table
$findRealEnd, // find_real_end
$sqlQueryForBookmark, // sql_query_for_bookmark
$extraData, // extra_data
$messageToShow, // message_to_show
$sqlData, // sql_data
$goto, // goto
$dispQuery, // disp_query
$dispMessage, // disp_message
$sqlQuery, // sql_query
$completeQuery // complete_query
);
}
/**
* Function to execute the query and send the response
*
* @param array $analyzedSqlResults analysed sql results
* @param bool $isGotoFile whether goto file or not
* @param string $db current database
* @param string|null $table current table
* @param bool|null $findRealEnd whether to find real end or not
* @param string|null $sqlQueryForBookmark the sql query to be stored as bookmark
* @param array|null $extraData extra data
* @param string|null $messageToShow message to show
* @param array|null $sqlData sql data
* @param string $goto goto page url
* @param string|null $dispQuery display query
* @param Message|string|null $dispMessage display message
* @param string $sqlQuery sql query
* @param string|null $completeQuery complete query
*
* @return string html
*/
public function executeQueryAndGetQueryResponse(
array $analyzedSqlResults,
$isGotoFile,
string $db,
?string $table,
$findRealEnd,
?string $sqlQueryForBookmark,
$extraData,
?string $messageToShow,
$sqlData,
$goto,
?string $dispQuery,
$dispMessage,
$sqlQuery,
?string $completeQuery
): string {
// Handle disable/enable foreign key checks
$defaultFkCheck = ForeignKey::handleDisableCheckInit();
// Handle remembered sorting order, only for single table query.
// Handling is not required when it's a union query
// (the parser never sets the 'union' key to 0).
// Handling is also not required if we came from the "Sort by key"
// drop-down.
if (
$analyzedSqlResults !== []
&& $this->isRememberSortingOrder($analyzedSqlResults)
&& empty($analyzedSqlResults['union'])
&& ! isset($_POST['sort_by_key'])
) {
if (! isset($_SESSION['sql_from_query_box'])) {
$this->handleSortOrder($db, $table, $analyzedSqlResults, $sqlQuery);
} else {
unset($_SESSION['sql_from_query_box']);
}
}
$displayResultsObject = new DisplayResults(
$GLOBALS['dbi'],
$GLOBALS['db'],
$GLOBALS['table'],
$GLOBALS['server'],
$goto,
$sqlQuery
);
$displayResultsObject->setConfigParamsForDisplayTable($analyzedSqlResults);
// assign default full_sql_query
$fullSqlQuery = $sqlQuery;
// Do append a "LIMIT" clause?
if ($this->isAppendLimitClause($analyzedSqlResults)) {
$fullSqlQuery = $this->getSqlWithLimitClause($analyzedSqlResults);
}
$GLOBALS['reload'] = $this->hasCurrentDbChanged($db);
$this->dbi->selectDb($db);
[
$result,
$numRows,
$unlimNumRows,
$profilingResults,
$extraData,
] = $this->executeTheQuery(
$analyzedSqlResults,
$fullSqlQuery,
$isGotoFile,
$db,
$table,
$findRealEnd,
$sqlQueryForBookmark,
$extraData
);
if ($this->dbi->moreResults()) {
$this->dbi->nextResult();
}
$warningMessages = $this->operations->getWarningMessagesArray();
// No rows returned -> move back to the calling page
if (($numRows == 0 && $unlimNumRows == 0) || $analyzedSqlResults['is_affected']) {
$htmlOutput = $this->getQueryResponseForNoResultsReturned(
$analyzedSqlResults,
$db,
$table,
$messageToShow,
$numRows,
$displayResultsObject,
$extraData,
$profilingResults,
$result,
$sqlQuery,
$completeQuery
);
} else {
// At least one row is returned -> displays a table with results
$htmlOutput = $this->getQueryResponseForResultsReturned(
$result,
$analyzedSqlResults,
$db,
$table,
$sqlData,
$displayResultsObject,
$unlimNumRows,
$numRows,
$dispQuery,
$dispMessage,
$profilingResults,
$sqlQuery,
$completeQuery
);
}
// Handle disable/enable foreign key checks
ForeignKey::handleDisableCheckCleanup($defaultFkCheck);
foreach ($warningMessages as $warning) {
$message = Message::notice(Message::sanitize($warning));
$htmlOutput .= $message->getDisplay();
}
return $htmlOutput;
}
/**
* Function to define pos to display a row
*
* @param int $numberOfLine Number of the line to display
*
* @return int Start position to display the line
*/
private function getStartPosToDisplayRow($numberOfLine)
{
$maxRows = $_SESSION['tmpval']['max_rows'];
return @((int) ceil($numberOfLine / $maxRows) - 1) * $maxRows;
}
/**
* Function to calculate new pos if pos is higher than number of rows
* of displayed table
*
* @param string $db Database name
* @param string $table Table name
* @param int|null $pos Initial position
*
* @return int Number of pos to display last page
*/
public function calculatePosForLastPage($db, $table, $pos)
{
if ($pos === null) {
$pos = $_SESSION['tmpval']['pos'];
}
$tableObject = new Table($table, $db);
$unlimNumRows = $tableObject->countRecords(true);
//If position is higher than number of rows
if ($unlimNumRows <= $pos && $pos != 0) {
$pos = $this->getStartPosToDisplayRow($unlimNumRows);
}
return $pos;
}
}