Finds the primary key columns of a table, from the database.

Parameters

string $table: The name of the table.

Return value

string[]|false A simple array with the names of the columns composing the table's primary key, or FALSE if the table does not exist.

Overrides Schema::findPrimaryKeyColumns

1 call to Schema::findPrimaryKeyColumns()

Schema::dropField in core/modules/mysql/src/Driver/Database/mysql/Schema.php

Drop a field.

File

core/modules/mysql/src/Driver/Database/mysql/Schema.php, line 525

Class

Schema

MySQL implementation of \Drupal\Core\Database\Schema.

Namespace

Drupal\mysql\Driver\Database\mysql

Code

protected function findPrimaryKeyColumns($table) {
  if (!$this->tableExists($table)) {
    return FALSE;
  }
  $result = $this->connection
    ->query("SHOW KEYS FROM {" . $table . "} WHERE Key_name = 'PRIMARY'")
    ->fetchAllAssoc('Column_name');
  return array_keys($result);
}

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