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Relation.php
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Relation.php
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<?php
/**
* Set of functions used with the relation and PDF feature
*/
declare(strict_types=1);
namespace PhpMyAdmin;
use PhpMyAdmin\Html\MySQLDocumentation;
use PhpMyAdmin\SqlParser\Parser;
use PhpMyAdmin\SqlParser\Statements\CreateStatement;
use PhpMyAdmin\SqlParser\Utils\Table as TableUtils;
use function array_reverse;
use function array_search;
use function array_shift;
use function asort;
use function bin2hex;
use function count;
use function defined;
use function explode;
use function file_get_contents;
use function htmlspecialchars;
use function implode;
use function in_array;
use function is_array;
use function is_bool;
use function is_string;
use function ksort;
use function mb_check_encoding;
use function mb_strlen;
use function mb_strtolower;
use function mb_strtoupper;
use function mb_substr;
use function natcasesort;
use function preg_match;
use function sprintf;
use function str_replace;
use function strlen;
use function strpos;
use function trim;
use function uksort;
use function usort;
/**
* Set of functions used with the relation and PDF feature
*/
class Relation
{
/** @var DatabaseInterface */
public $dbi;
/** @var Template */
public $template;
/**
* @param DatabaseInterface|null $dbi Database interface
* @param Template|null $template Template instance
*/
public function __construct(?DatabaseInterface $dbi, ?Template $template = null)
{
$this->dbi = $dbi;
$this->template = $template ?? new Template();
}
/**
* Executes a query as controluser if possible, otherwise as normal user
*
* @param string $sql the query to execute
* @param bool $show_error whether to display SQL error messages or not
* @param int $options query options
*
* @return mixed|bool the result set, or false if no result set
*
* @access public
*/
public function queryAsControlUser($sql, $show_error = true, $options = 0)
{
// Avoid caching of the number of rows affected; for example, this function
// is called for tracking purposes but we want to display the correct number
// of rows affected by the original query, not by the query generated for
// tracking.
$cache_affected_rows = false;
if ($show_error) {
$result = $this->dbi->query(
$sql,
DatabaseInterface::CONNECT_CONTROL,
$options,
$cache_affected_rows
);
} else {
$result = @$this->dbi->tryQuery(
$sql,
DatabaseInterface::CONNECT_CONTROL,
$options,
$cache_affected_rows
);
}
if ($result) {
return $result;
}
return false;
}
/**
* Returns current relation parameters
*
* @return string[]
*/
public function getRelationsParam(): array
{
if (empty($_SESSION['relation'][$GLOBALS['server']])
|| empty($_SESSION['relation'][$GLOBALS['server']]['PMA_VERSION'])
|| $_SESSION['relation'][$GLOBALS['server']]['PMA_VERSION'] != PMA_VERSION
) {
$_SESSION['relation'][$GLOBALS['server']] = $this->checkRelationsParam();
}
// just for BC but needs to be before getRelationsParamDiagnostic()
// which uses it
$GLOBALS['cfgRelation'] = $_SESSION['relation'][$GLOBALS['server']];
return $_SESSION['relation'][$GLOBALS['server']];
}
/**
* prints out diagnostic info for pma relation feature
*
* @param array $cfgRelation Relation configuration
*
* @return string
*/
public function getRelationsParamDiagnostic(array $cfgRelation)
{
$retval = '<br>';
$messages = [];
$messages['error'] = '<span class="caution"><strong>'
. __('not OK')
. '</strong></span>';
$messages['ok'] = '<span class="success"><strong>'
. _pgettext('Correctly working', 'OK')
. '</strong></span>';
$messages['enabled'] = '<span class="success">' . __('Enabled') . '</span>';
$messages['disabled'] = '<span class="caution">' . __('Disabled') . '</span>';
if (strlen((string) $cfgRelation['db']) == 0) {
$retval .= __('Configuration of pmadb…') . ' '
. $messages['error']
. MySQLDocumentation::showDocumentation('setup', 'linked-tables')
. '<br>' . "\n"
. __('General relation features')
. ' <font color="green">' . __('Disabled')
. '</font>' . "\n";
if ($GLOBALS['cfg']['ZeroConf']) {
if (strlen($GLOBALS['db']) == 0) {
$retval .= $this->getHtmlFixPmaTables(true, true);
} else {
$retval .= $this->getHtmlFixPmaTables(true);
}
}
} else {
$retval .= '<table class="pma-table">' . "\n";
if (! $cfgRelation['allworks']
&& $GLOBALS['cfg']['ZeroConf']
// Avoid showing a "Create missing tables" link if it's a
// problem of missing definition
&& $this->arePmadbTablesDefined()
) {
$retval .= $this->getHtmlFixPmaTables(false);
$retval .= '<br>';
}
$retval .= $this->getDiagMessageForParameter(
'pmadb',
$cfgRelation['db'],
$messages,
'pmadb'
);
$retval .= $this->getDiagMessageForParameter(
'relation',
isset($cfgRelation['relation']),
$messages,
'relation'
);
$retval .= $this->getDiagMessageForFeature(
__('General relation features'),
'relwork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'table_info',
isset($cfgRelation['table_info']),
$messages,
'table_info'
);
$retval .= $this->getDiagMessageForFeature(
__('Display Features'),
'displaywork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'table_coords',
isset($cfgRelation['table_coords']),
$messages,
'table_coords'
);
$retval .= $this->getDiagMessageForParameter(
'pdf_pages',
isset($cfgRelation['pdf_pages']),
$messages,
'pdf_pages'
);
$retval .= $this->getDiagMessageForFeature(
__('Designer and creation of PDFs'),
'pdfwork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'column_info',
isset($cfgRelation['column_info']),
$messages,
'column_info'
);
$retval .= $this->getDiagMessageForFeature(
__('Displaying Column Comments'),
'commwork',
$messages,
false
);
$retval .= $this->getDiagMessageForFeature(
__('Browser transformation'),
'mimework',
$messages
);
if ($cfgRelation['commwork'] && ! $cfgRelation['mimework']) {
$retval .= '<tr><td colspan=2 class="left error">';
$retval .= __(
'Please see the documentation on how to'
. ' update your column_info table.'
);
$retval .= MySQLDocumentation::showDocumentation(
'config',
'cfg_Servers_column_info'
);
$retval .= '</td></tr>';
}
$retval .= $this->getDiagMessageForParameter(
'bookmarktable',
isset($cfgRelation['bookmark']),
$messages,
'bookmark'
);
$retval .= $this->getDiagMessageForFeature(
__('Bookmarked SQL query'),
'bookmarkwork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'history',
isset($cfgRelation['history']),
$messages,
'history'
);
$retval .= $this->getDiagMessageForFeature(
__('SQL history'),
'historywork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'recent',
isset($cfgRelation['recent']),
$messages,
'recent'
);
$retval .= $this->getDiagMessageForFeature(
__('Persistent recently used tables'),
'recentwork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'favorite',
isset($cfgRelation['favorite']),
$messages,
'favorite'
);
$retval .= $this->getDiagMessageForFeature(
__('Persistent favorite tables'),
'favoritework',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'table_uiprefs',
isset($cfgRelation['table_uiprefs']),
$messages,
'table_uiprefs'
);
$retval .= $this->getDiagMessageForFeature(
__('Persistent tables\' UI preferences'),
'uiprefswork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'tracking',
isset($cfgRelation['tracking']),
$messages,
'tracking'
);
$retval .= $this->getDiagMessageForFeature(
__('Tracking'),
'trackingwork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'userconfig',
isset($cfgRelation['userconfig']),
$messages,
'userconfig'
);
$retval .= $this->getDiagMessageForFeature(
__('User preferences'),
'userconfigwork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'users',
isset($cfgRelation['users']),
$messages,
'users'
);
$retval .= $this->getDiagMessageForParameter(
'usergroups',
isset($cfgRelation['usergroups']),
$messages,
'usergroups'
);
$retval .= $this->getDiagMessageForFeature(
__('Configurable menus'),
'menuswork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'navigationhiding',
isset($cfgRelation['navigationhiding']),
$messages,
'navigationhiding'
);
$retval .= $this->getDiagMessageForFeature(
__('Hide/show navigation items'),
'navwork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'savedsearches',
isset($cfgRelation['savedsearches']),
$messages,
'savedsearches'
);
$retval .= $this->getDiagMessageForFeature(
__('Saving Query-By-Example searches'),
'savedsearcheswork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'central_columns',
isset($cfgRelation['central_columns']),
$messages,
'central_columns'
);
$retval .= $this->getDiagMessageForFeature(
__('Managing Central list of columns'),
'centralcolumnswork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'designer_settings',
isset($cfgRelation['designer_settings']),
$messages,
'designer_settings'
);
$retval .= $this->getDiagMessageForFeature(
__('Remembering Designer Settings'),
'designersettingswork',
$messages
);
$retval .= $this->getDiagMessageForParameter(
'export_templates',
isset($cfgRelation['export_templates']),
$messages,
'export_templates'
);
$retval .= $this->getDiagMessageForFeature(
__('Saving export templates'),
'exporttemplateswork',
$messages
);
$retval .= '</table>' . "\n";
if (! $cfgRelation['allworks']) {
$retval .= $this->template->render('relation/diagnostic_info', ['sql_dir' => SQL_DIR]);
}
}
return $retval;
}
/**
* prints out one diagnostic message for a feature
*
* @param string $feature_name feature name in a message string
* @param string $relation_parameter the $GLOBALS['cfgRelation'] parameter to check
* @param array $messages utility messages
* @param bool $skip_line whether to skip a line after the message
*
* @return string
*/
public function getDiagMessageForFeature(
$feature_name,
$relation_parameter,
array $messages,
$skip_line = true
) {
$retval = ' <tr><td colspan=2 class="right">' . $feature_name . ': ';
if (isset($GLOBALS['cfgRelation'][$relation_parameter])
&& $GLOBALS['cfgRelation'][$relation_parameter]
) {
$retval .= $messages['enabled'];
} else {
$retval .= $messages['disabled'];
}
$retval .= '</td></tr>';
if ($skip_line) {
$retval .= '<tr><td> </td></tr>';
}
return $retval;
}
/**
* prints out one diagnostic message for a configuration parameter
*
* @param string $parameter config parameter name to display
* @param bool $relationParameterSet whether this parameter is set
* @param array $messages utility messages
* @param string $docAnchor anchor in documentation
*
* @return string
*/
public function getDiagMessageForParameter(
$parameter,
$relationParameterSet,
array $messages,
$docAnchor
) {
$retval = '<tr><th class="left">';
$retval .= '$cfg[\'Servers\'][$i][\'' . $parameter . '\'] ... ';
$retval .= '</th><td class="right">';
if ($relationParameterSet) {
$retval .= $messages['ok'];
} else {
$retval .= sprintf(
$messages['error'],
MySQLDocumentation::getDocumentationLink('config', 'cfg_Servers_' . $docAnchor)
);
}
$retval .= '</td></tr>' . "\n";
return $retval;
}
private function checkTableAccess(array $cfgRelation): array
{
if (isset($cfgRelation['relation'], $cfgRelation['table_info'])) {
if ($this->canAccessStorageTable($cfgRelation['table_info'])) {
$cfgRelation['displaywork'] = true;
}
}
if (isset($cfgRelation['table_coords'], $cfgRelation['pdf_pages'])) {
if ($this->canAccessStorageTable($cfgRelation['table_coords'])) {
if ($this->canAccessStorageTable($cfgRelation['pdf_pages'])) {
$cfgRelation['pdfwork'] = true;
}
}
}
if (isset($cfgRelation['column_info'])) {
if ($this->canAccessStorageTable($cfgRelation['column_info'])) {
$cfgRelation['commwork'] = true;
// phpMyAdmin 4.3+
// Check for input transformations upgrade.
$cfgRelation['mimework'] = $this->tryUpgradeTransformations();
}
}
if (isset($cfgRelation['users'], $cfgRelation['usergroups'])) {
if ($this->canAccessStorageTable($cfgRelation['users'])) {
if ($this->canAccessStorageTable($cfgRelation['usergroups'])) {
$cfgRelation['menuswork'] = true;
}
}
}
$settings = [
'export_templates' => 'exporttemplateswork',
'designer_settings' => 'designersettingswork',
'central_columns' => 'centralcolumnswork',
'savedsearches' => 'savedsearcheswork',
'navigationhiding' => 'navwork',
'bookmark' => 'bookmarkwork',
'userconfig' => 'userconfigwork',
'tracking' => 'trackingwork',
'table_uiprefs' => 'uiprefswork',
'favorite' => 'favoritework',
'recent' => 'recentwork',
'history' => 'historywork',
'relation' => 'relwork',
];
foreach ($settings as $setingName => $worksKey) {
if (! isset($cfgRelation[$setingName])) {
continue;
}
if (! $this->canAccessStorageTable($cfgRelation[$setingName])) {
continue;
}
$cfgRelation[$worksKey] = true;
}
return $cfgRelation;
}
private function fillCfgRelationWithTableNames(array $cfgRelation): ?array
{
$tabQuery = 'SHOW TABLES FROM '
. Util::backquote(
$GLOBALS['cfg']['Server']['pmadb']
);
$tableRes = $this->queryAsControlUser(
$tabQuery,
false,
DatabaseInterface::QUERY_STORE
);
if (is_bool($tableRes)) {
return null;
}
while ($currTable = @$this->dbi->fetchRow($tableRes)) {
if ($currTable[0] == $GLOBALS['cfg']['Server']['bookmarktable']) {
$cfgRelation['bookmark'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['relation']) {
$cfgRelation['relation'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['table_info']) {
$cfgRelation['table_info'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['table_coords']) {
$cfgRelation['table_coords'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['column_info']) {
$cfgRelation['column_info'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['pdf_pages']) {
$cfgRelation['pdf_pages'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['history']) {
$cfgRelation['history'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['recent']) {
$cfgRelation['recent'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['favorite']) {
$cfgRelation['favorite'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['table_uiprefs']) {
$cfgRelation['table_uiprefs'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['tracking']) {
$cfgRelation['tracking'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['userconfig']) {
$cfgRelation['userconfig'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['users']) {
$cfgRelation['users'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['usergroups']) {
$cfgRelation['usergroups'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['navigationhiding']) {
$cfgRelation['navigationhiding'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['savedsearches']) {
$cfgRelation['savedsearches'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['central_columns']) {
$cfgRelation['central_columns'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['designer_settings']) {
$cfgRelation['designer_settings'] = $currTable[0];
} elseif ($currTable[0] == $GLOBALS['cfg']['Server']['export_templates']) {
$cfgRelation['export_templates'] = $currTable[0];
}
}
$this->dbi->freeResult($tableRes);
return $cfgRelation;
}
/**
* Defines the relation parameters for the current user
* just a copy of the functions used for relations ;-)
* but added some stuff to check what will work
*
* @return string[] the relation parameters for the current user
*
* @access protected
*/
public function checkRelationsParam(): array
{
$cfgRelation = [];
$cfgRelation['PMA_VERSION'] = PMA_VERSION;
$workToTable = [
'relwork' => 'relation',
'displaywork' => [
'relation',
'table_info',
],
'bookmarkwork' => 'bookmarktable',
'pdfwork' => [
'table_coords',
'pdf_pages',
],
'commwork' => 'column_info',
'mimework' => 'column_info',
'historywork' => 'history',
'recentwork' => 'recent',
'favoritework' => 'favorite',
'uiprefswork' => 'table_uiprefs',
'trackingwork' => 'tracking',
'userconfigwork' => 'userconfig',
'menuswork' => [
'users',
'usergroups',
],
'navwork' => 'navigationhiding',
'savedsearcheswork' => 'savedsearches',
'centralcolumnswork' => 'central_columns',
'designersettingswork' => 'designer_settings',
'exporttemplateswork' => 'export_templates',
];
foreach ($workToTable as $work => $table) {
$cfgRelation[$work] = false;
}
$cfgRelation['allworks'] = false;
$cfgRelation['user'] = null;
$cfgRelation['db'] = null;
if ($GLOBALS['server'] == 0
|| empty($GLOBALS['cfg']['Server']['pmadb'])
|| ! $this->dbi->selectDb(
$GLOBALS['cfg']['Server']['pmadb'],
DatabaseInterface::CONNECT_CONTROL
)
) {
// No server selected -> no bookmark table
// we return the array with the falses in it,
// to avoid some 'Uninitialized string offset' errors later
$GLOBALS['cfg']['Server']['pmadb'] = false;
return $cfgRelation;
}
$cfgRelation['user'] = $GLOBALS['cfg']['Server']['user'];
$cfgRelation['db'] = $GLOBALS['cfg']['Server']['pmadb'];
// Now I just check if all tables that i need are present so I can for
// example enable relations but not pdf...
// I was thinking of checking if they have all required columns but I
// fear it might be too slow
$cfgRelationFilled = $this->fillCfgRelationWithTableNames($cfgRelation);
if ($cfgRelationFilled === null) {
// query failed ... ?
//$GLOBALS['cfg']['Server']['pmadb'] = false;
return $cfgRelation;
}
// Filling did success
$cfgRelation = $cfgRelationFilled;
$cfgRelation = $this->checkTableAccess($cfgRelation);
$allWorks = true;
foreach ($workToTable as $work => $table) {
if ($cfgRelation[$work]) {
continue;
}
if (is_string($table)) {
if (isset($GLOBALS['cfg']['Server'][$table])
&& $GLOBALS['cfg']['Server'][$table] !== false
) {
$allWorks = false;
break;
}
} elseif (is_array($table)) {
$oneNull = false;
foreach ($table as $t) {
if (isset($GLOBALS['cfg']['Server'][$t])
&& $GLOBALS['cfg']['Server'][$t] === false
) {
$oneNull = true;
break;
}
}
if (! $oneNull) {
$allWorks = false;
break;
}
}
}
$cfgRelation['allworks'] = $allWorks;
return $cfgRelation;
}
/**
* Check if the table is accessible
*
* @param string $tableDbName The table or table.db
*
* @return bool The table is accessible
*/
public function canAccessStorageTable(string $tableDbName): bool
{
$result = $this->queryAsControlUser(
'SELECT NULL FROM ' . Util::backquote($tableDbName) . ' LIMIT 0',
false,
DatabaseInterface::QUERY_STORE
);
return $result !== false;
}
/**
* Check whether column_info table input transformation
* upgrade is required and try to upgrade silently
*
* @return bool false if upgrade failed
*
* @access public
*/
public function tryUpgradeTransformations()
{
// From 4.3, new input oriented transformation feature was introduced.
// Check whether column_info table has input transformation columns
$new_cols = [
'input_transformation',
'input_transformation_options',
];
$query = 'SHOW COLUMNS FROM '
. Util::backquote($GLOBALS['cfg']['Server']['pmadb'])
. '.' . Util::backquote(
$GLOBALS['cfg']['Server']['column_info']
)
. ' WHERE Field IN (\'' . implode('\', \'', $new_cols) . '\')';
$result = $this->queryAsControlUser(
$query,
false,
DatabaseInterface::QUERY_STORE
);
if ($result) {
$rows = $this->dbi->numRows($result);
$this->dbi->freeResult($result);
// input transformations are present
// no need to upgrade
if ($rows === 2) {
return true;
// try silent upgrade without disturbing the user
}
// read upgrade query file
$query = @file_get_contents(SQL_DIR . 'upgrade_column_info_4_3_0+.sql');
// replace database name from query to with set in config.inc.php
// replace pma__column_info table name from query
// to with set in config.inc.php
$query = str_replace(
[
'`phpmyadmin`',
'`pma__column_info`',
],
[
Util::backquote($GLOBALS['cfg']['Server']['pmadb']),
Util::backquote($GLOBALS['cfg']['Server']['column_info']),
],
(string) $query
);
$this->dbi->tryMultiQuery($query, DatabaseInterface::CONNECT_CONTROL);
// skips result sets of query as we are not interested in it
do {
$hasResult = (
$this->dbi->moreResults(DatabaseInterface::CONNECT_CONTROL)
&& $this->dbi->nextResult(DatabaseInterface::CONNECT_CONTROL)
);
} while ($hasResult);
$error = $this->dbi->getError(DatabaseInterface::CONNECT_CONTROL);
// return true if no error exists otherwise false
return empty($error);
}
// some failure, either in upgrading or something else
// make some noise, time to wake up user.
return false;
}
/**
* Gets all Relations to foreign tables for a given table or
* optionally a given column in a table
*
* @param string $db the name of the db to check for
* @param string $table the name of the table to check for
* @param string $column the name of the column to check for
* @param string $source the source for foreign key information
*
* @return array db,table,column
*
* @access public
*/
public function getForeigners($db, $table, $column = '', $source = 'both')
{
$cfgRelation = $this->getRelationsParam();
$foreign = [];
if ($cfgRelation['relwork'] && ($source === 'both' || $source === 'internal')) {
$rel_query = 'SELECT `master_field`, `foreign_db`, '
. '`foreign_table`, `foreign_field`'
. ' FROM ' . Util::backquote($cfgRelation['db'])
. '.' . Util::backquote($cfgRelation['relation'])
. ' WHERE `master_db` = \'' . $this->dbi->escapeString($db) . '\''
. ' AND `master_table` = \'' . $this->dbi->escapeString($table) . '\'';
if (strlen($column) > 0) {
$rel_query .= ' AND `master_field` = '
. '\'' . $this->dbi->escapeString($column) . '\'';
}
$foreign = $this->dbi->fetchResult(
$rel_query,
'master_field',
null,
DatabaseInterface::CONNECT_CONTROL
);
}
if (($source === 'both' || $source === 'foreign') && strlen($table) > 0) {
$tableObj = new Table($table, $db);
$show_create_table = $tableObj->showCreate();
if ($show_create_table) {
$parser = new Parser($show_create_table);
/**
* @var CreateStatement $stmt
*/
$stmt = $parser->statements[0];
$foreign['foreign_keys_data'] = TableUtils::getForeignKeys(
$stmt
);
}
}
/**
* Emulating relations for some information_schema tables
*/
$isInformationSchema = mb_strtolower($db) === 'information_schema';
$isMysql = mb_strtolower($db) === 'mysql';
if (($isInformationSchema || $isMysql)
&& ($source === 'internal' || $source === 'both')
) {
if ($isInformationSchema) {
$internalRelations = InternalRelations::getInformationSchema();
} else {
$internalRelations = InternalRelations::getMySql();
}
if (isset($internalRelations[$table])) {
foreach ($internalRelations[$table] as $field => $relations) {
if ((strlen($column) !== 0 && $column != $field)
|| (isset($foreign[$field])
&& strlen($foreign[$field]) !== 0)
) {
continue;
}
$foreign[$field] = $relations;
}
}
}
return $foreign;
}
/**
* Gets the display field of a table
*
* @param string $db the name of the db to check for
* @param string $table the name of the table to check for
*
* @return string|false field name or false
*
* @access public
*/
public function getDisplayField($db, $table)
{
$cfgRelation = $this->getRelationsParam();
/**
* Try to fetch the display field from DB.
*/
if ($cfgRelation['displaywork']) {
$disp_query = 'SELECT `display_field`'
. ' FROM ' . Util::backquote($cfgRelation['db'])
. '.' . Util::backquote($cfgRelation['table_info'])
. ' WHERE `db_name` = \'' . $this->dbi->escapeString((string) $db) . '\''
. ' AND `table_name` = \'' . $this->dbi->escapeString((string) $table) . '\'';
$row = $this->dbi->fetchSingleRow(
$disp_query,
'ASSOC',
DatabaseInterface::CONNECT_CONTROL
);
if (isset($row['display_field'])) {
return $row['display_field'];
}
}
/**
* Emulating the display field for some information_schema tables.
*/
if ($db === 'information_schema') {
switch ($table) {
case 'CHARACTER_SETS':
return 'DESCRIPTION';
case 'TABLES':
return 'TABLE_COMMENT';
}
}
/**
* Pick first char field
*/
$columns = $this->dbi->getColumnsFull($db, $table);
if ($columns) {
foreach ($columns as $column) {
if ($this->dbi->types->getTypeClass($column['DATA_TYPE']) === 'CHAR') {
return $column['COLUMN_NAME'];
}
}
}
return false;
}
/**
* Gets the comments for all columns of a table or the db itself
*
* @param string $db the name of the db to check for
* @param string $table the name of the table to check for
*
* @return array [column_name] = comment
*
* @access public
*/
public function getComments($db, $table = '')
{
$comments = [];
if ($table != '') {
// MySQL native column comments
$columns = $this->dbi->getColumns($db, $table, null, true);
if ($columns) {
foreach ($columns as $column) {
if (empty($column['Comment'])) {
continue;
}
$comments[$column['Field']] = $column['Comment'];
}
}
} else {
$comments[] = $this->getDbComment($db);
}
return $comments;
}
/**
* Gets the comment for a db
*
* @param string $db the name of the db to check for
*
* @return string comment
*
* @access public
*/
public function getDbComment($db)
{
$cfgRelation = $this->getRelationsParam();