function _db_create_field_sql in Drupal 6

Same name in this branch

1. 6 includes/database.mysql-common.inc \_db_create_field_sql()
2. 6 includes/database.pgsql.inc \_db_create_field_sql()

Create an SQL string for a field to be used in table creation or alteration.

Before passing a field out of a schema definition into this function it has to be processed by _db_process_field().

Parameters

$name: Name of the field.

$spec: The field specification, as per the schema data structure format.

Related topics

5 calls to _db_create_field_sql()

db_add_field in includes/database.mysql-common.inc

Add a new field to a table.

db_add_field in includes/database.pgsql.inc

Add a new field to a table.

db_change_field in includes/database.mysql-common.inc

Change a field definition.

db_create_table_sql in includes/database.mysql-common.inc

Generate SQL to create a new table from a Drupal schema definition.

db_create_table_sql in includes/database.pgsql.inc

Generate SQL to create a new table from a Drupal schema definition.

File

includes/database.pgsql.inc, line 589

Database interface code for PostgreSQL database servers.

Code

function _db_create_field_sql($name, $spec) {
  $sql = $name . ' ' . $spec['pgsql_type'];
  if ($spec['type'] == 'serial') {
    unset($spec['not null']);
  }
  if (in_array($spec['type'], array(
    'varchar',
    'char',
    'text',
  )) && isset($spec['length'])) {
    $sql .= '(' . $spec['length'] . ')';
  }
  elseif (isset($spec['precision']) && isset($spec['scale'])) {
    $sql .= '(' . $spec['precision'] . ', ' . $spec['scale'] . ')';
  }
  if (!empty($spec['unsigned'])) {
    $sql .= " CHECK ({$name} >= 0)";
  }
  if (isset($spec['not null']) && $spec['not null']) {
    $sql .= ' NOT NULL';
  }
  if (isset($spec['default'])) {
    $default = is_string($spec['default']) ? "'" . $spec['default'] . "'" : $spec['default'];
    $sql .= " default {$default}";
  }
  return $sql;
}