diff options
Diffstat (limited to 'system/database/drivers/sqlite/sqlite_forge.php')
| -rw-r--r-- | system/database/drivers/sqlite/sqlite_forge.php | 110 |
1 files changed, 28 insertions, 82 deletions
diff --git a/system/database/drivers/sqlite/sqlite_forge.php b/system/database/drivers/sqlite/sqlite_forge.php index 068a556ed..4c91cc35f 100644 --- a/system/database/drivers/sqlite/sqlite_forge.php +++ b/system/database/drivers/sqlite/sqlite_forge.php @@ -59,12 +59,9 @@ class CI_DB_sqlite_forge extends CI_DB_forge { { if ( ! @file_exists($this->db->database) OR ! @unlink($this->db->database)) { - if ($this->db->db_debug) - { - return $this->db->display_error('db_unable_to_drop'); - } - return FALSE; + return ($this->db->db_debug) ? $this->db->display_error('db_unable_to_drop') : FALSE; } + return TRUE; } @@ -90,54 +87,29 @@ class CI_DB_sqlite_forge extends CI_DB_forge { $sql .= 'IF NOT EXISTS '; } - $sql .= $this->db->_escape_identifiers($table)."("; + $sql .= $this->db->_escape_identifiers($table).'('; $current_field_count = 0; - foreach ($fields as $field=>$attributes) + foreach ($fields as $field => $attributes) { // Numeric field names aren't allowed in databases, so if the key is // numeric, we know it was assigned by PHP and the developer manually // entered the field information, so we'll simply add it to the list if (is_numeric($field)) { - $sql .= "\n\t$attributes"; + $sql .= "\n\t".$attributes; } else { $attributes = array_change_key_case($attributes, CASE_UPPER); - $sql .= "\n\t".$this->db->protect_identifiers($field); - - $sql .= ' '.$attributes['TYPE']; - - if (array_key_exists('CONSTRAINT', $attributes)) - { - $sql .= '('.$attributes['CONSTRAINT'].')'; - } - - if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE) - { - $sql .= ' UNSIGNED'; - } - - if (array_key_exists('DEFAULT', $attributes)) - { - $sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\''; - } - - if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE) - { - $sql .= ' NULL'; - } - else - { - $sql .= ' NOT NULL'; - } - - if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE) - { - $sql .= ' AUTO_INCREMENT'; - } + $sql .= "\n\t".$this->db->protect_identifiers($field) + .' '.$attributes['TYPE'] + .( ! empty($attributes['CONSTRAINT']) ? '('.$attributes['CONSTRAINT'].')' : '') + .(( ! empty($attributes['UNSIGNED']) && $attributes['UNSIGNED'] === TRUE) ? ' UNSIGNED' : '') + .(isset($attributes['DEFAULT']) ? ' DEFAULT \''.$attributes['DEFAULT'].'\'' : '') + .(( ! empty($attributes['NULL']) && $attributes['NULL'] === TRUE) ? ' NULL' : ' NOT NULL') + .(( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE) ? ' AUTO_INCREMENT' : ''); } // don't add a comma on the end of the last field @@ -149,8 +121,7 @@ class CI_DB_sqlite_forge extends CI_DB_forge { if (count($primary_keys) > 0) { - $primary_keys = $this->db->protect_identifiers($primary_keys); - $sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")"; + $sql .= ",\n\tPRIMARY KEY (".implode(', ', $this->db->protect_identifiers($primary_keys)).')'; } if (is_array($keys) && count($keys) > 0) @@ -166,13 +137,11 @@ class CI_DB_sqlite_forge extends CI_DB_forge { $key = array($this->db->protect_identifiers($key)); } - $sql .= ",\n\tUNIQUE (" . implode(', ', $key) . ")"; + $sql .= ",\n\tUNIQUE (".implode(', ', $key).')'; } } - $sql .= "\n)"; - - return $sql; + return $sql."\n)"; } // -------------------------------------------------------------------- @@ -180,15 +149,11 @@ class CI_DB_sqlite_forge extends CI_DB_forge { /** * Drop Table * - * @return bool + * @return string */ public function _drop_table($table) { - if ($this->db->db_debug) - { - return $this->db->display_error('db_unsuported_feature'); - } - return array(); + return 'DROP TABLE '.$table.' IF EXISTS'; } // -------------------------------------------------------------------- @@ -210,40 +175,21 @@ class CI_DB_sqlite_forge extends CI_DB_forge { */ public function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '') { - $sql = 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' '.$this->db->protect_identifiers($column_name); - - // DROP has everything it needs now. - if ($alter_type == 'DROP') + /* SQLite only supports adding new columns and it does + * NOT support the AFTER statement. Each new column will + * be added as the last one in the table. + */ + if ($alter_type !== 'ADD COLUMN') { - // SQLite does not support dropping columns - // http://www.sqlite.org/omitted.html - // http://www.sqlite.org/faq.html#q11 + // Not supported return FALSE; } - $sql .= " $column_definition"; - - if ($default_value != '') - { - $sql .= " DEFAULT \"$default_value\""; - } - - if ($null === NULL) - { - $sql .= ' NULL'; - } - else - { - $sql .= ' NOT NULL'; - } - - if ($after_field != '') - { - return $sql.' AFTER '.$this->db->protect_identifiers($after_field); - } - - return $sql; - + return 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' '.$this->db->protect_identifiers($column_name) + .' '.$column_definition + .($default_value != '' ? ' DEFAULT "'.$default_value.'"' : '') + // If NOT NULL is specified, the field must have a DEFAULT value other than NULL + .(($null !== NULL && $default_value !== 'NULL') ? ' NOT NULL' : ' NULL'); } // -------------------------------------------------------------------- |