protected Schema::ensureIdentifiersLength($identifier)
Make sure to limit identifiers according to PostgreSQL compiled in length.
PostgreSQL allows in standard configuration no longer identifiers than 63 chars for table/relation names, indexes, primary keys, and constraints. So we map all identifiers that are too long to drupal_base64hash_tag, where tag is one of:
- idx for indexes
- key for constraints
- pkey for primary keys
Parameters
$identifiers: The arguments to build the identifier string
Return value
The index/constraint/pkey identifier
File
- core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php, line 57
Class
- Schema
- PostgreSQL implementation of \Drupal\Core\Database\Schema.
Namespace
Drupal\Core\Database\Driver\pgsql
Code
protected function ensureIdentifiersLength($identifier) {
$args = func_get_args();
$info = $this->getPrefixInfo($identifier);
$args[0] = $info['table'];
$identifierName = implode('__', $args);
// Retrieve the max identifier length which is usually 63 characters
// but can be altered before PostgreSQL is compiled so we need to check.
$this->maxIdentifierLength = $this->connection->query("SHOW max_identifier_length")->fetchField();
if (strlen($identifierName) > $this->maxIdentifierLength) {
$saveIdentifier = '"drupal_' . $this->hashBase64($identifierName) . '_' . $args[2] . '"';
}
else {
$saveIdentifier = $identifierName;
}
return $saveIdentifier;
}
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