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<?php /** * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file */ namespace Wikimedia\Rdbms; use Exception; use RuntimeException; /** * Advanced database interface for IDatabase handles that include maintenance methods * * This is useful for type-hints used by installer, upgrader, and background scripts * that will make use of lower-level and longer-running queries, including schema changes. * * @ingroup Database * @since 1.28 */ interface IMaintainableDatabase extends IDatabase { /** * Read and execute SQL commands from a file. * * Returns true on success, error string or exception on failure (depending * on object's error ignore settings). * * @param string $filename File name to open * @param callable|null $lineCallback Optional function called before reading each line * @param callable|null $resultCallback Optional function called for each MySQL result * @param string|false $fname Calling function name or false if name should be * generated dynamically using $filename * @param callable|null $inputCallback Optional function called for each * complete line sent * @return bool|string * @throws Exception */ public function sourceFile( $filename, ?callable $lineCallback = null, ?callable $resultCallback = null, $fname = false, ?callable $inputCallback = null ); /** * Read and execute commands from an open file handle. * * Returns true on success, error string or exception on failure (depending * on object's error ignore settings). * * @param resource $fp File handle * @param callable|null $lineCallback Optional function called before reading each query * @param callable|null $resultCallback Optional function called for each MySQL result * @param string $fname Calling function name @phan-mandatory-param * @param callable|null $inputCallback Optional function called for each complete query sent * @return bool|string */ public function sourceStream( $fp, ?callable $lineCallback = null, ?callable $resultCallback = null, $fname = __METHOD__, ?callable $inputCallback = null ); /** * Called by sourceStream() to check if we've reached a statement end * * @param string &$sql SQL assembled so far * @param string &$newLine New line about to be added to $sql * @return bool Whether $newLine contains end of the statement */ public function streamStatementEnd( &$sql, &$newLine ); /** * Delete a table * * @param string $table The unqualified name of a table * @param string $fname @phan-mandatory-param * @return bool Whether the table already existed * @throws DBError If an error occurs */ public function dropTable( $table, $fname = __METHOD__ ); /** * Delete all data in a table and reset any sequences owned by that table * * @param string $table The unqualified name of a table * @param string $fname @phan-mandatory-param * @throws DBError If an error occurs * @since 1.42 */ public function truncateTable( $table, $fname = __METHOD__ ); /** * Creates a new table with structure copied from existing table * * Note that unlike most database abstraction functions, this function does not * automatically append database prefix, because it works at a lower abstraction level. * The table names passed to this function shall not be quoted (this function calls * addIdentifierQuotes() when needed). * * @param string $oldName Name of table whose structure should be copied * @param string $newName Name of table to be created * @param bool $temporary Whether the new table should be temporary * @param string $fname Calling function name @phan-mandatory-param * @return bool True if operation was successful * @throws RuntimeException */ public function duplicateTableStructure( $oldName, $newName, $temporary = false, $fname = __METHOD__ ); /** * List all tables on the database. * * Since MW 1.42, this will no longer include MySQL views. * * @param string|null $prefix Only show tables with this prefix, e.g. mw_ * @param string $fname Calling function name @phan-mandatory-param * @throws DBError * @return array */ public function listTables( $prefix = null, $fname = __METHOD__ ); /** * Get information about a field * Returns false if the field doesn't exist * * @param string $table The unqualified name of a table * @param string $field Field name * * @return false|Field */ public function fieldInfo( $table, $field ); /** * Determines whether a field exists in a table * * @param string $table The unqualified name of a table * @param string $field Field to check on that table * @param string $fname Calling function name @phan-mandatory-param * @return bool Whether $table has field $field * @throws DBError If an error occurs, {@see query} */ public function fieldExists( $table, $field, $fname = __METHOD__ ); /** * Determines whether an index exists * * @param string $table The unqualified name of a table * @param string $index * @param string $fname @phan-mandatory-param * @return bool * @throws DBError If an error occurs, {@see query} */ public function indexExists( $table, $index, $fname = __METHOD__ ); /** * Determines if a given index is unique * * @param string $table The unqualified name of a table * @param string $index * @param string $fname Calling function name @phan-mandatory-param * @return bool|null Returns null if the index does not exist * @throws DBError If an error occurs, {@see query} */ public function indexUnique( $table, $index, $fname = __METHOD__ ); /** * Query whether a given table exists * * @param string $table The unqualified name of a table * @param string $fname @phan-mandatory-param * @return bool * @throws DBError If an error occurs, {@see query} */ public function tableExists( $table, $fname = __METHOD__ ); }
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