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1. drupal
   1. drupal7

Check if a column exists in the given table.

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Schema API

A Drupal schema definition is an array structure representing one or more tables and their related keys and indexes. A schema is defined by hook_schema(), which usually lives in a modulename.install file.

Code

includes/database/schema.inc, line 217

<?php
public function columnExists($table, $column) {
  $condition = $this->buildTableNameCondition($this->connection->prefixTables('{' . $table . '}'));
  $condition->condition('column_name', $column);
  $condition->compile($this->connection);
  // Normally, we would heartily discourage the use of string
  // concatination 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 table.
  return db_query("SELECT column_name FROM information_schema.columns WHERE " . (string) $condition, $condition->arguments())->fetchAllKeyed(0, 0);
}
?>