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authorChristophe.Boulain <>2009-06-15 07:49:42 +0000
committerChristophe.Boulain <>2009-06-15 07:49:42 +0000
commit3f0149b5b74d4017ba7f4ca28aa8a3e2053db964 (patch)
treec21232fbbd5218b826574458612557f59cf7e3c2 /framework/Db/schema/oci/TOciSchema.php
parentcb0f97438fe634c5a95179d47c78af04fffa751b (diff)
Primilary import of new db stuff
Diffstat (limited to 'framework/Db/schema/oci/TOciSchema.php')
-rwxr-xr-xframework/Db/schema/oci/TOciSchema.php278
1 files changed, 278 insertions, 0 deletions
diff --git a/framework/Db/schema/oci/TOciSchema.php b/framework/Db/schema/oci/TOciSchema.php
new file mode 100755
index 00000000..5c4dd8e2
--- /dev/null
+++ b/framework/Db/schema/oci/TOciSchema.php
@@ -0,0 +1,278 @@
+<?php
+/**
+ * TOciSchema class file.
+ *
+ * @author Ricardo Grana <rickgrana@yahoo.com.br>
+ * @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');
+
+/**
+ * TOciSchema is the class for retrieving metadata information from a PostgreSQL database.
+ *
+ * @author Ricardo Grana <qiang.xue@gmail.com>
+ * @version $Id$
+ * @package system.db.schema.oci
+ * @since 1.0.5
+ */
+class TOciSchema extends TDbSchema
+{
+ private $_defaultSchema = '';
+ private $_sequences=array();
+
+ /**
+ * Quotes a table name for use in a query.
+ * @param string table name
+ * @return string the properly quoted table name
+ */
+ public function quoteTableName($name)
+ {
+ return $name;
+ }
+
+ /**
+ * Quotes a column name for use in a query.
+ * @param string column name
+ * @return string the properly quoted column name
+ */
+ public function quoteColumnName($name)
+ {
+ return $name;
+ }
+
+ /**
+ * Creates a command builder for the database.
+ * This method may be overridden by child classes to create a DBMS-specific command builder.
+ * @return TDbCommandBuilder command builder instance
+ */
+ protected function createCommandBuilder()
+ {
+ return new TOciCommandBuilder($this);
+ }
+
+ /**
+ * @param string default schema.
+ */
+ public function setDefaultSchema($schema)
+ {
+ $this->_defaultSchema=$schema;
+ }
+
+ /**
+ * @return string default schema.
+ */
+ public function getDefaultSchema()
+ {
+ if (!strlen($this->_defaultSchema))
+ {
+ $this->setDefaultSchema(strtoupper($this->getDbConnection()->username));
+ }
+
+ return $this->_defaultSchema;
+ }
+
+ /**
+ * @param string table name with optional schema name prefix, uses default schema name prefix is not provided.
+ * @return array tuple as ($schemaName,$tableName)
+ */
+ protected function getSchemaTableName($table)
+ {
+ $table = strtoupper($table);
+ if(count($parts= explode('.', str_replace('"','',$table))) > 1)
+ return array($parts[0], $parts[1]);
+ else
+ return array($this->getDefaultSchema(),$parts[0]);
+ }
+
+ /**
+ * Creates a table instance representing the metadata for the named table.
+ * @return TDbTableSchema driver dependent table metadata.
+ */
+ protected function createTable($name)
+ {
+ $table=new TOciTableSchema;
+ $this->resolveTableNames($table,$name);
+
+ if(!$this->findColumns($table))
+ return null;
+ $this->findConstraints($table);
+
+ return $table;
+ }
+
+ /**
+ * Generates various kinds of table names.
+ * @param TOciTableSchema the table instance
+ * @param string the unquoted table name
+ */
+ protected function resolveTableNames($table,$name)
+ {
+ $parts=explode('.',str_replace('"','',$name));
+ if(isset($parts[1]))
+ {
+ $schemaName=$parts[0];
+ $tableName=$parts[1];
+ }
+ else
+ {
+ $schemaName=$this->getDefaultSchema();
+ $tableName=$parts[0];
+ }
+
+ $table->name=$tableName;
+ $table->schemaName=$schemaName;
+ if($schemaName===$this->getDefaultSchema())
+ $table->rawName=$this->quoteTableName($tableName);
+ else
+ $table->rawName=$this->quoteTableName($schemaName).'.'.$this->quoteTableName($tableName);
+ }
+
+ /**
+ * Collects the table column metadata.
+ * @param TOciTableSchema the table metadata
+ * @return boolean whether the table exists in the database
+ */
+ protected function findColumns($table)
+ {
+ list($schemaName,$tableName) = $this->getSchemaTableName($table->name);
+
+ $sql=<<<EOD
+SELECT a.column_name, a.data_type ||
+ case
+ when data_precision is not null
+ then '(' || a.data_precision ||
+ case when a.data_scale > 0 then ',' || a.data_scale else '' end
+ || ')'
+ when data_type = 'DATE' then ''
+ else '(' || to_char(a.data_length) || ')'
+ end as data_type,
+ a.nullable, a.data_default,
+ ( SELECT D.constraint_type
+ FROM ALL_CONS_COLUMNS C
+ inner join ALL_constraints D on D.OWNER = C.OWNER and D.constraint_name = C.constraint_name
+ WHERE C.OWNER = B.OWNER
+ and C.table_name = B.object_name
+ and C.column_name = A.column_name
+ and D.constraint_type = 'P') as Key
+FROM ALL_TAB_COLUMNS A
+inner join ALL_OBJECTS B ON b.owner = a.owner and ltrim(B.OBJECT_NAME) = ltrim(A.TABLE_NAME)
+WHERE
+ a.owner = '{$schemaName}'
+ and b.object_type = 'TABLE'
+ and b.object_name = '{$tableName}'
+ORDER by a.column_id
+EOD;
+
+ $command=$this->getDbConnection()->createCommand($sql);
+
+ if(($columns=$command->queryAll())===array()){
+ return false;
+ }
+
+ foreach($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;
+ }
+ }
+ return true;
+ }
+
+ /**
+ * Creates a table column.
+ * @param array column metadata
+ * @return TDbColumnSchema normalized column metadata
+ */
+ protected function createColumn($column)
+ {
+ $c=new TOciColumnSchema;
+ $c->name=$column['COLUMN_NAME'];
+ $c->rawName=$this->quoteColumnName($c->name);
+ $c->allowNull=$column['NULLABLE']==='Y';
+ $c->isPrimaryKey=strpos($column['KEY'],'P')!==false;
+ $c->isForeignKey=false;
+ $c->init($column['DATA_TYPE'],$column['DATA_DEFAULT']);
+
+ return $c;
+ }
+
+ /**
+ * Collects the primary and foreign key column details for the given table.
+ * @param TOciTableSchema the table metadata
+ */
+ protected function findConstraints($table)
+ {
+ $sql=<<<EOD
+ SELECT D.constraint_type, C.COLUMN_NAME, C.position, D.r_constraint_name,
+ E.table_name as table_ref, f.column_name as column_ref
+ FROM ALL_CONS_COLUMNS C
+ inner join ALL_constraints D on D.OWNER = C.OWNER and D.constraint_name = C.constraint_name
+ left join ALL_constraints E on E.OWNER = D.r_OWNER and E.constraint_name = D.r_constraint_name
+ left join ALL_cons_columns F on F.OWNER = E.OWNER and F.constraint_name = E.constraint_name and F.position = c.position
+ WHERE C.OWNER = '{$table->schemaName}'
+ and C.table_name = '{$table->name}'
+ and D.constraint_type <> 'P'
+ order by d.constraint_name, c.position
+EOD;
+ $command=$this->getDbConnection()->createCommand($sql);
+ foreach($command->queryAll() as $row)
+ {
+ if($row['constraint_type']==='R') // foreign key
+ {
+ $name = $row["COLUMN_NAME"];
+ $table->foreignKeys[$name]=array($row["TABLE_REF"], array($row["COLUMN_REF"]));
+ if(isset($table->columns[$name]))
+ $table->columns[$name]->isForeignKey=true;
+ }
+
+ }
+ }
+
+
+ /**
+ * Returns all table names in the database.
+ * @return array all table names in the database.
+ */
+ protected function findTableNames($schema='')
+ {
+ if($schema==='')
+ {
+ $sql=<<<EOD
+SELECT table_name, '{$schema}' as table_schema FROM user_tables
+EOD;
+ $command=$this->getDbConnection()->createCommand($sql);
+ }
+ else
+ {
+ $sql=<<<EOD
+SELECT object_name as table_name, owner as table_schema FROM all_objects
+WHERE object_type = 'TABLE' AND owner=:schema
+EOD;
+ $command=$this->getDbConnection()->createCommand($sql);
+ $command->bindParam(':schema',$schema);
+ }
+
+ $rows=$command->queryAll();
+ $names=array();
+ foreach($rows as $row)
+ {
+ if($schema===$this->getDefaultSchema())
+ $names[]=$row['table_name'];
+ else
+ $names[]=$row['schema_name'].'.'.$row['table_name'];
+ }
+ return $names;
+ }
+}