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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/mysql/schema.inc, line 343

<?php
public function changeField(&$ret, $table, $field, $field_new, $spec, $keys_new = array()) {
  $sql = 'ALTER TABLE {' . $table . '} CHANGE `' . $field . '` ' . $this->createFieldSql($field_new, $this->processField($spec));
  if (count($keys_new)) {
    $sql .= ', ADD ' . implode(', ADD ', $this->createKeysSql($keys_new));
  }
  $ret[] = update_sql($sql);
}
?>