public Schema::findTables($table_expression)
Finds all tables that are like the specified base table name.
Parameters
string $table_expression: An SQL expression, for example "cache_%" (without the quotes).
Return value
array Both the keys and the values are the matching tables.
File
- core/lib/Drupal/Core/Database/Schema.php, line 183
Class
- Schema
- Provides a base implementation for Database Schema.
Namespace
Drupal\Core\Database
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | public function findTables($table_expression) { // Load all the tables up front in order to take into account per-table // prefixes. The actual matching is done at the bottom of the method. $condition = $this->buildTableNameCondition('%', 'LIKE'); $condition->compile($this->connection, $this); $individually_prefixed_tables = $this->connection->getUnprefixedTablesMap(); $default_prefix = $this->connection->tablePrefix(); $default_prefix_length = strlen($default_prefix); $tables = []; // Normally, we would heartily discourage the use of string // concatenation for conditionals like this however, we // couldn't use db_select() here because it would prefix // information_schema.tables and the query would fail. // Don't use {} around information_schema.tables table. $results = $this->connection->query("SELECT table_name FROM information_schema.tables WHERE " . (string) $condition, $condition->arguments()); foreach ($results as $table) { // Take into account tables that have an individual prefix. if (isset($individually_prefixed_tables[$table->table_name])) { $prefix_length = strlen($this->connection->tablePrefix($individually_prefixed_tables[$table->table_name])); } elseif ($default_prefix && substr($table->table_name, 0, $default_prefix_length) !== $default_prefix) { // This table name does not start the default prefix, which means that // it is not managed by Drupal so it should be excluded from the result. continue; } else { $prefix_length = $default_prefix_length; } // Remove the prefix from the returned tables. $unprefixed_table_name = substr($table->table_name, $prefix_length); // The pattern can match a table which is the same as the prefix. That // will become an empty string when we remove the prefix, which will // probably surprise the caller, besides not being a prefixed table. So // remove it. if (!empty($unprefixed_table_name)) { $tables[$unprefixed_table_name] = $unprefixed_table_name; } } // Convert the table expression from its SQL LIKE syntax to a regular // expression and escape the delimiter that will be used for matching. $table_expression = str_replace(array('%', '_'), array('.*?', '.'), preg_quote($table_expression, '/')); $tables = preg_grep('/^' . $table_expression . '$/i', $tables); return $tables;} |
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