function _db_create_field_sql in Drupal 6
Same name in this branch
- 6 includes/database.mysql-common.inc \_db_create_field_sql()
- 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.
$spec: The field specification, as per the schema data structure format.
Related topics
5 calls to _db_create_field_sql()
- db_add_field in includes/
database.mysql-common.inc - Add a new field to a table.
- db_add_field in includes/
database.pgsql.inc - Add a new field to a table.
- db_change_field in includes/
database.mysql-common.inc - Change a field definition.
- db_create_table_sql in includes/
database.mysql-common.inc - Generate SQL to create a new table from a Drupal schema definition.
- db_create_table_sql in includes/
database.pgsql.inc - Generate SQL to create a new table from a Drupal schema definition.
File
- includes/
database.mysql-common.inc, line 165 - Functions shared between mysql and mysqli database engines.
Code
function _db_create_field_sql($name, $spec) {
$sql = "`" . $name . "` " . $spec['mysql_type'];
if (in_array($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'])) {
$sql .= ' unsigned';
}
if (!empty($spec['not null'])) {
$sql .= ' NOT NULL';
}
if (!empty($spec['auto_increment'])) {
$sql .= ' auto_increment';
}
if (isset($spec['default'])) {
if (is_string($spec['default'])) {
$spec['default'] = "'" . $spec['default'] . "'";
}
$sql .= ' DEFAULT ' . $spec['default'];
}
if (empty($spec['not null']) && !isset($spec['default'])) {
$sql .= ' DEFAULT NULL';
}
return $sql;
}