summaryrefslogtreecommitdiff
path: root/framework/Db/schema/sqlite
diff options
context:
space:
mode:
Diffstat (limited to 'framework/Db/schema/sqlite')
-rwxr-xr-xframework/Db/schema/sqlite/TSqliteColumnSchema.php35
-rwxr-xr-xframework/Db/schema/sqlite/TSqliteCommandBuilder.php43
-rwxr-xr-xframework/Db/schema/sqlite/TSqliteSchema.php134
3 files changed, 212 insertions, 0 deletions
diff --git a/framework/Db/schema/sqlite/TSqliteColumnSchema.php b/framework/Db/schema/sqlite/TSqliteColumnSchema.php
new file mode 100755
index 00000000..a6194fcd
--- /dev/null
+++ b/framework/Db/schema/sqlite/TSqliteColumnSchema.php
@@ -0,0 +1,35 @@
+<?php
+/**
+ * TSqliteColumnSchema class file.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2009 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+prado::using('System.db.schema.TDbColumnSchema');
+
+/**
+ * TSqliteColumnSchema class describes the column meta data of a SQLite table.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id$
+ * @package system.db.schema.sqlite
+ * @since 1.0
+ */
+class TSqliteColumnSchema extends TDbColumnSchema
+{
+ /**
+ * Extracts the default value for the column.
+ * The value is typecasted to correct PHP type.
+ * @param mixed the default value obtained from metadata
+ */
+ protected function extractDefault($defaultValue)
+ {
+ if($this->type==='string') // PHP 5.2.6 adds single quotes while 5.2.0 doesn't
+ $this->defaultValue=trim($defaultValue,"'\"");
+ else
+ $this->defaultValue=$this->typecast($defaultValue);
+ }
+}
diff --git a/framework/Db/schema/sqlite/TSqliteCommandBuilder.php b/framework/Db/schema/sqlite/TSqliteCommandBuilder.php
new file mode 100755
index 00000000..ed73160a
--- /dev/null
+++ b/framework/Db/schema/sqlite/TSqliteCommandBuilder.php
@@ -0,0 +1,43 @@
+<?php
+/**
+ * TSqliteCommandBuilder class file.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2009 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+prado::using('System.db.schema.TDbCommandBuilder');
+
+/**
+ * TSqliteCommandBuilder provides basic methods to create query commands for SQLite tables.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id$
+ * @package system.db.schema.sqlite
+ * @since 1.0
+ */
+class TSqliteCommandBuilder extends TDbCommandBuilder
+{
+ /**
+ * Generates the expression for selecting rows with specified composite key values.
+ * This method is overridden because SQLite does not support the default
+ * IN expression with composite columns.
+ * @param TDbTableSchema the table schema
+ * @param array list of primary key values to be selected within
+ * @param string column prefix (ended with dot)
+ * @return string the expression for selection
+ * @since 1.0.4
+ */
+ protected function createCompositeInCondition($table,$values,$prefix)
+ {
+ $keyNames=array();
+ foreach(array_keys($values[0]) as $name)
+ $keyNames[]=$prefix.$table->columns[$name]->rawName;
+ $vs=array();
+ foreach($values as $value)
+ $vs[]=implode("||','||",$value);
+ return implode("||','||",$keyNames).' IN ('.implode(', ',$vs).')';
+ }
+}
diff --git a/framework/Db/schema/sqlite/TSqliteSchema.php b/framework/Db/schema/sqlite/TSqliteSchema.php
new file mode 100755
index 00000000..1c6ba78f
--- /dev/null
+++ b/framework/Db/schema/sqlite/TSqliteSchema.php
@@ -0,0 +1,134 @@
+<?php
+/**
+ * TSqliteSchema class file.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2009 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+prado::using('System.db.schema.TDbSchema');
+prado::using('System.db.schema.TDbTableSchema');
+prado::using('System.db.schema.sqlite.TSqliteColumnSchema');
+prado::using('System.db.schema.sqlite.TSqliteCommandBuilder');
+
+/**
+ * TSqliteSchema is the class for retrieving metadata information from a SQLite (2/3) database.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id$
+ * @package system.db.schema.sqlite
+ * @since 1.0
+ */
+class TSqliteSchema extends TDbSchema
+{
+ /**
+ * Returns all table names in the database.
+ * @param string the schema of the tables. This is not used for sqlite database.
+ * @return array all table names in the database.
+ * @since 1.0.2
+ */
+ protected function findTableNames($schema='')
+ {
+ $sql="SELECT DISTINCT tbl_name FROM sqlite_master WHERE tbl_name<>'sqlite_sequence'";
+ return $this->getDbConnection()->createCommand($sql)->queryColumn();
+ }
+
+ /**
+ * Creates a command builder for the database.
+ * @return TSqliteCommandBuilder command builder instance
+ */
+ protected function createCommandBuilder()
+ {
+ return new TSqliteCommandBuilder($this);
+ }
+
+ /**
+ * Creates a table instance representing the metadata for the named table.
+ * @return TDbTableSchema driver dependent table metadata. Null if the table does not exist.
+ */
+ protected function createTable($name)
+ {
+ $db=$this->getDbConnection();
+
+ $table=new TDbTableSchema;
+ $table->name=$name;
+ $table->rawName=$this->quoteTableName($name);
+
+ if($this->findColumns($table))
+ {
+ $this->findConstraints($table);
+ return $table;
+ }
+ else
+ return null;
+ }
+
+ /**
+ * Collects the table column metadata.
+ * @param TDbTableSchema the table metadata
+ * @return boolean whether the table exists in the database
+ */
+ protected function findColumns($table)
+ {
+ $sql="PRAGMA table_info({$table->rawName})";
+ $columns=$this->getDbConnection()->createCommand($sql)->queryAll();
+ if(empty($columns))
+ return false;
+
+ foreach($columns as $column)
+ {
+ $c=$this->createColumn($column);
+ $table->columns[$c->name]=$c;
+ if($c->isPrimaryKey)
+ {
+ if($table->primaryKey===null)
+ $table->primaryKey=$c->name;
+ else if(is_string($table->primaryKey))
+ $table->primaryKey=array($table->primaryKey,$c->name);
+ else
+ $table->primaryKey[]=$c->name;
+ }
+ }
+ if(is_string($table->primaryKey) && !strncasecmp($table->columns[$table->primaryKey]->dbType,'int',3))
+ $table->sequenceName='';
+
+ return true;
+ }
+
+ /**
+ * Collects the foreign key column details for the given table.
+ * @param TDbTableSchema the table metadata
+ */
+ protected function findConstraints($table)
+ {
+ $foreignKeys=array();
+ $sql="PRAGMA foreign_key_list({$table->rawName})";
+ $keys=$this->getDbConnection()->createCommand($sql)->queryAll();
+ foreach($keys as $key)
+ {
+ $column=$table->columns[$key['from']];
+ $column->isForeignKey=true;
+ $foreignKeys[$key['from']]=array($key['table'],$key['to']);
+ }
+ $table->foreignKeys=$foreignKeys;
+ }
+
+ /**
+ * Creates a table column.
+ * @param array column metadata
+ * @return TDbColumnSchema normalized column metadata
+ */
+ protected function createColumn($column)
+ {
+ $c=new TSqliteColumnSchema;
+ $c->name=$column['name'];
+ $c->rawName=$this->quoteColumnName($c->name);
+ $c->allowNull=!$column['notnull'];
+ $c->isPrimaryKey=$column['pk']!=0;
+ $c->isForeignKey=false;
+ $c->init(strtolower($column['type']),$column['dflt_value']);
+ return $c;
+ }
+}