/**
* Clone the table structure
*/
public function cloneTableStructure()
{
global $wgSharedTables, $wgSharedDB;
foreach ($this->tablesToClone as $tbl) {
if ($wgSharedDB && in_array($tbl, $wgSharedTables, true)) {
// Shared tables don't work properly when cloning due to
// how prefixes are handled (bug 65654)
throw new RuntimeException("Cannot clone shared table {$tbl}.");
}
# Clean up from previous aborted run. So that table escaping
# works correctly across DB engines, we need to change the pre-
# fix back and forth so tableName() works right.
self::changePrefix($this->oldTablePrefix);
$oldTableName = $this->db->tableName($tbl, 'raw');
self::changePrefix($this->newTablePrefix);
$newTableName = $this->db->tableName($tbl, 'raw');
if ($this->dropCurrentTables && !in_array($this->db->getType(), ['postgres', 'oracle'])) {
if ($oldTableName === $newTableName) {
// Last ditch check to avoid data loss
throw new LogicException("Not dropping new table, as '{$newTableName}'" . " is name of both the old and the new table.");
}
$this->db->dropTable($tbl, __METHOD__);
wfDebug(__METHOD__ . " dropping {$newTableName}\n");
// Dropping the oldTable because the prefix was changed
}
# Create new table
wfDebug(__METHOD__ . " duplicating {$oldTableName} to {$newTableName}\n");
$this->db->duplicateTableStructure($oldTableName, $newTableName, $this->useTemporaryTables);
}
}
