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-rw-r--r--lib/schema.php189
1 files changed, 177 insertions, 12 deletions
diff --git a/lib/schema.php b/lib/schema.php
index f49075690..056c2093d 100644
--- a/lib/schema.php
+++ b/lib/schema.php
@@ -193,32 +193,161 @@ class Schema
return true;
}
- public function createIndex($name, $table, $columns)
+ public function createIndex($table, $columnNames, $name = null)
{
+ if (!is_array($columnNames)) {
+ $columnNames = array($columnNames);
+ }
+
+ if (empty($name)) {
+ $name = "$table_".implode("_", $columnNames)."_idx";
+ }
+
+ $res =& $this->conn->query("ALTER TABLE $table ADD INDEX $name (".implode(",", $columnNames).")");
+
+ if (PEAR::isError($res)) {
+ throw new Exception($res->getMessage());
+ }
+
+ return true;
}
- public function dropIndex($name, $table)
+ public function dropIndex($table, $name)
{
+ $res =& $this->conn->query("ALTER TABLE $table DROP INDEX $name");
+
+ if (PEAR::isError($res)) {
+ throw new Exception($res->getMessage());
+ }
+
+ return true;
}
public function addColumn($table, $columndef)
{
+ $sql = "ALTER TABLE $table ADD COLUMN " . $this->_columnSql($columndef);
+
+ $res =& $this->conn->query($sql);
+
+ if (PEAR::isError($res)) {
+ throw new Exception($res->getMessage());
+ }
+
+ return true;
+ }
+
+ public function modifyColumn($table, $columndef)
+ {
+ $sql = "ALTER TABLE $table MODIFY COLUMN " . $this->_columnSql($columndef);
+
+ $res =& $this->conn->query($sql);
+
+ if (PEAR::isError($res)) {
+ throw new Exception($res->getMessage());
+ }
+
+ return true;
+ }
+
+ public function dropColumn($table, $columnName)
+ {
+ $sql = "ALTER TABLE $table DROP COLUMN $columnName";
+
+ $res =& $this->conn->query($sql);
+
+ if (PEAR::isError($res)) {
+ throw new Exception($res->getMessage());
+ }
+
+ return true;
}
- public function modifyColumn($table, $column, $columndef)
+ public function ensureTable($tableName, $columns, $indices=null)
{
+ // XXX: DB engine portability -> toilet
+
+ try {
+ $td = $this->getTableDef($tableName);
+ } catch (Exception $e) {
+ if (preg_match('/no such table/', $e->getMessage())) {
+ return $this->createTable($tableName, $columns, $indices);
+ } else {
+ throw $e;
+ }
+ }
+
+ $cur = $this->_names($td->columns);
+ $new = $this->_names($columns);
+
+ $toadd = array_diff($new, $cur);
+ $todrop = array_diff($cur, $new);
+
+ $same = array_intersect($new, $cur);
+
+ foreach ($same as $m) {
+ $curCol = $this->_byName($td->columns, $m);
+ $newCol = $this->_byName($columns, $m);
+
+ if (!$newCol->equals($curCol)) {
+ $tomod[] = $newCol->name;
+ }
+ }
+
+ if (count($toadd) + count($todrop) + count($tomod) == 0) {
+ // nothing to do
+ return true;
+ }
+
+ // For efficiency, we want this all in one
+ // query, instead of using our methods.
+
+ $phrase = array();
+
+ foreach ($toadd as $columnName) {
+ $cd = $this->_byName($columns, $columnName);
+ $phrase[] = 'ADD COLUMN ' . $this->_columnSql($cd);
+ }
+
+ foreach ($todrop as $columnName) {
+ $phrase[] = 'DROP COLUMN ' . $columnName;
+ }
+
+ foreach ($tomod as $columnName) {
+ $cd = $this->_byName($columns, $columnName);
+ $phrase[] = 'MODIFY COLUMN ' . $this->_columnSql($cd);
+ }
+
+ $sql = 'ALTER TABLE ' . $tableName . ' ' . implode(', ', $phrase);
+
+ $res =& $this->conn->query($sql);
+
+ if (PEAR::isError($res)) {
+ throw new Exception($res->getMessage());
+ }
+
+ return true;
}
- public function dropColumn($table, $column)
+ function _names($cds)
{
+ $names = array();
+
+ foreach ($cds as $cd) {
+ $names[] = $cd->name;
+ }
+
+ return $names;
}
- public function ensureTable($name, $columns, $indices)
+ function _byName($cds, $name)
{
- $def = $this->tableDef($name);
- if (empty($def)) {
- return $this->createTable($name, $columns, $indices);
+ foreach ($cds as $cd) {
+ if ($cd->name == $name) {
+ return $cd;
+ }
}
+
+ return null;
}
function _columnSql($cd)
@@ -257,16 +386,52 @@ class ColumnDef
public $default;
public $extra;
- function __construct($name, $type, $size=null, $nullable=null,
+ function __construct($name, $type, $size=null, $nullable=true,
$key=null, $default=null, $extra=null) {
- $this->name = $name;
- $this->type = $type;
- $this->size = $size;
+ $this->name = strtolower($name);
+ $this->type = strtolower($type);
+ $this->size = $size+0;
$this->nullable = $nullable;
$this->key = $key;
$this->default = $default;
$this->extra = $extra;
}
+
+ function equals($other)
+ {
+ return ($this->name == $other->name &&
+ $this->_typeMatch($other) &&
+ $this->_defaultMatch($other) &&
+ $this->_nullMatch($other) &&
+ $this->key == $other->key);
+ }
+
+ function _typeMatch($other)
+ {
+ switch ($this->type) {
+ case 'integer':
+ case 'int':
+ return ($other->type == 'integer' ||
+ $other->type == 'int');
+ break;
+ default:
+ return ($this->type == $other->type &&
+ $this->size == $other->size);
+ }
+ }
+
+ function _defaultMatch($other)
+ {
+ return ((is_null($this->default) && is_null($other->default)) ||
+ ($this->default == $other->default));
+ }
+
+ function _nullMatch($other)
+ {
+ return ((!is_null($this->default) && !is_null($other->default) &&
+ $this->default == $other->default) ||
+ ($this->nullable == $other->nullable));
+ }
}
class IndexDef