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CCubridSchema

Package system.db.schema.cubrid
Inheritance class CCubridSchema » CDbSchema » CComponent
Since 1.1.16
Source Code framework/db/schema/cubrid/CCubridSchema.php
CCubridSchema is the class for retrieving metadata information from a CUBRID database (version 8.4.0 and later).

Public Properties

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PropertyTypeDescriptionDefined By
columnTypes CCubridSchema
commandBuilder CDbCommandBuilder the SQL command builder for this connection. CDbSchema
dbConnection CDbConnection database connection. CDbSchema
tableNames array Returns all table names in the database. CDbSchema
tables array Returns the metadata for all tables in the database. CDbSchema

Protected Properties

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PropertyTypeDescriptionDefined By
serverVersion float server version. CCubridSchema

Public Methods

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MethodDescriptionDefined By
__call() Calls the named method which is not a class method. CComponent
__construct() Constructor. CDbSchema
__get() Returns a property value, an event handler list or a behavior based on its name. CComponent
__isset() Checks if a property value is null. CComponent
__set() Sets value of a component property. CComponent
__unset() Sets a component property to be null. CComponent
addColumn() Builds a SQL statement for adding a new DB column. CDbSchema
addForeignKey() Builds a SQL statement for adding a foreign key constraint to an existing table. CDbSchema
addPrimaryKey() Builds a SQL statement for adding a primary key constraint to an existing table. CDbSchema
alterColumn() Builds a SQL statement for changing the definition of a column. CDbSchema
asa() Returns the named behavior object. CComponent
attachBehavior() Attaches a behavior to this component. CComponent
attachBehaviors() Attaches a list of behaviors to the component. CComponent
attachEventHandler() Attaches an event handler to an event. CComponent
canGetProperty() Determines whether a property can be read. CComponent
canSetProperty() Determines whether a property can be set. CComponent
checkIntegrity() Enables or disables integrity check. CDbSchema
compareTableNames() Compares two table names. CCubridSchema
createIndex() Builds a SQL statement for creating a new index. CDbSchema
createTable() Builds a SQL statement for creating a new DB table. CDbSchema
detachBehavior() Detaches a behavior from the component. CComponent
detachBehaviors() Detaches all behaviors from the component. CComponent
detachEventHandler() Detaches an existing event handler. CComponent
disableBehavior() Disables an attached behavior. CComponent
disableBehaviors() Disables all behaviors attached to this component. CComponent
dropColumn() Builds a SQL statement for dropping a DB column. CDbSchema
dropForeignKey() Builds a SQL statement for dropping a foreign key constraint. CDbSchema
dropIndex() Builds a SQL statement for dropping an index. CDbSchema
dropPrimaryKey() Builds a SQL statement for removing a primary key constraint to an existing table. CDbSchema
dropTable() Builds a SQL statement for dropping a DB table. CDbSchema
enableBehavior() Enables an attached behavior. CComponent
enableBehaviors() Enables all behaviors attached to this component. CComponent
evaluateExpression() Evaluates a PHP expression or callback under the context of this component. CComponent
getColumnType() Converts an abstract column type into a physical column type. CDbSchema
getCommandBuilder() Returns the SQL command builder for this connection. CDbSchema
getDbConnection() Returns database connection. The connection is active. CDbSchema
getEventHandlers() Returns the list of attached event handlers for an event. CComponent
getTable() Obtains the metadata for the named table. CDbSchema
getTableNames() Returns all table names in the database. CDbSchema
getTables() Returns the metadata for all tables in the database. CDbSchema
hasEvent() Determines whether an event is defined. CComponent
hasEventHandler() Checks whether the named event has attached handlers. CComponent
hasProperty() Determines whether a property is defined. CComponent
quoteColumnName() Quotes a column name for use in a query. CDbSchema
quoteSimpleColumnName() Quotes a column name for use in a query. CCubridSchema
quoteSimpleTableName() Quotes a table name for use in a query. CCubridSchema
quoteTableName() Quotes a table name for use in a query. CDbSchema
raiseEvent() Raises an event. CComponent
refresh() Refreshes the schema. CDbSchema
renameColumn() Builds a SQL statement for renaming a column. CDbSchema
renameTable() Builds a SQL statement for renaming a DB table. CDbSchema
resetSequence() Resets the sequence value of a table's primary key. CCubridSchema
truncateTable() Builds a SQL statement for truncating a DB table. CDbSchema

Protected Methods

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MethodDescriptionDefined By
createColumn() Creates a table column. CCubridSchema
createCommandBuilder() Creates a command builder for the database. CDbSchema
findColumns() Collects the table column metadata. CCubridSchema
findConstraints() Collects the foreign key column details for the given table. CCubridSchema
findPrimaryKeys() Collects the primary key column details for the given table. CCubridSchema
findTableNames() Returns all table names in the database. CCubridSchema
getServerVersion() Returns server version. CCubridSchema
loadTable() Creates a table instance representing the metadata for the named table. CCubridSchema
resolveTableNames() Generates various kinds of table names. CCubridSchema

Property Details

columnTypes property
public $columnTypes;

serverVersion property read-only
protected float getServerVersion()

server version.

Method Details

compareTableNames() method
public boolean compareTableNames(string $name1, string $name2)
$name1 string table name 1
$name2 string table name 2
{return} boolean whether the two table names refer to the same table.
Source Code: framework/db/schema/cubrid/CCubridSchema.php#69 (show)
public function compareTableNames($name1,$name2)
{
    return parent::compareTableNames(strtolower($name1),strtolower($name2));
}

Compares two table names. The table names can be either quoted or unquoted. This method will consider both cases.

createColumn() method
protected CDbColumnSchema createColumn(array $column)
$column array column metadata
{return} CDbColumnSchema normalized column metadata
Source Code: framework/db/schema/cubrid/CCubridSchema.php#165 (show)
protected function createColumn($column)
{
    $c=new CCubridColumnSchema;
    $c->name=$column['Field'];
    $c->rawName=$this->quoteColumnName($c->name);
    $c->allowNull=$column['Null']==='YES';
    $c->isPrimaryKey=strpos($column['Key'],'PRI')!==false;
    $c->isForeignKey=false;
    $c->init($column['Type'],$column['Default']);
    $c->autoIncrement=strpos(strtolower($column['Extra']),'auto_increment')!==false;

    return $c;
}

Creates a table column.

findColumns() method
protected boolean findColumns(CCubridTableSchema $table)
$table CCubridTableSchema the table metadata
{return} boolean whether the table exists in the database
Source Code: framework/db/schema/cubrid/CCubridSchema.php#140 (show)
protected function findColumns($table)
{
    // it may be good to use CUBRID PHP API to retrieve column info.
    $sql='SHOW COLUMNS FROM '.$table->rawName;
    try
    {
        $columns=$this->getDbConnection()->createCommand($sql)->queryAll();
    }
    catch(Exception $e)
    {
        return false;
    }
    foreach($columns as $column)
    {
        $c=$this->createColumn($column);
        $table->columns[$c->name]=$c;
    }
    return true;
}

Collects the table column metadata.

findConstraints() method
protected void findConstraints(CCubridTableSchema $table)
$table CCubridTableSchema the table metadata
Source Code: framework/db/schema/cubrid/CCubridSchema.php#194 (show)
protected function findConstraints($table)
{
    $schemas=$this->getDbConnection()->getPdoInstance()->cubrid_schema(PDO::CUBRID_SCH_IMPORTED_KEYS,$table->name);

    foreach($schemas as $schema)
    {
        $table->foreignKeys[$schema["FKCOLUMN_NAME"]]=array($schema["PKTABLE_NAME"],$schema["PKCOLUMN_NAME"]);
        if(isset($table->columns[$schema["FKCOLUMN_NAME"]]))
            $table->columns[$schema["FKCOLUMN_NAME"]]->isForeignKey=true;
    }
}

Collects the foreign key column details for the given table.

findPrimaryKeys() method
protected void findPrimaryKeys(CCubridTableSchema $table)
$table CCubridTableSchema the table metadata
Source Code: framework/db/schema/cubrid/CCubridSchema.php#210 (show)
protected function findPrimaryKeys($table)
{
    $pks=$this->getDbConnection()->getPdoInstance()->cubrid_schema(PDO::CUBRID_SCH_PRIMARY_KEY,$table->name);

    foreach($pks as $pk)
    {
        $c = $table->columns[$pk['ATTR_NAME']];
        $c->isPrimaryKey = true;

        if($table->primaryKey===null)
            $table->primaryKey=$c->name;
        elseif(is_string($table->primaryKey))
            $table->primaryKey=array($table->primaryKey,$c->name);
        else
            $table->primaryKey[]=$c->name;
        if($c->autoIncrement)
            $table->sequenceName='';
    }
}

Collects the primary key column details for the given table.

findTableNames() method
protected array findTableNames(string $schema='')
$schema string the schema of the tables. Defaults to empty string, meaning the current or default schema. If not empty, the returned table names will be prefixed with the schema name.
{return} array all table names in the database.
Source Code: framework/db/schema/cubrid/CCubridSchema.php#236 (show)
protected function findTableNames($schema='')
{
    // CUBRID does not allow to look into another database from within another connection.
    // If necessary user has to establish a connection to that particular database and
    // query to show all tables. For this reason if a user executes this funtion
    // we will return all table names of the currently connected database.
    return $this->getDbConnection()->createCommand('SHOW TABLES')->queryColumn();
}

Returns all table names in the database.

getServerVersion() method
protected float getServerVersion()
{return} float server version.
Source Code: framework/db/schema/cubrid/CCubridSchema.php#182 (show)
protected function getServerVersion()
{
    $version=$this->getDbConnection()->getAttribute(PDO::ATTR_SERVER_VERSION);
    $digits=array();
    preg_match('/(\d+)\.(\d+)\.(\d+).(\d+)/', $version, $digits);
    return floatval($digits[1].'.'.$digits[2].$digits[3].'.'.$digits[4]);
}

loadTable() method
protected CCubridTableSchema loadTable(string $name)
$name string table name
{return} CCubridTableSchema driver dependent table metadata. Null if the table does not exist.
Source Code: framework/db/schema/cubrid/CCubridSchema.php#99 (show)
protected function loadTable($name)
{
    $table=new CCubridTableSchema;
    $this->resolveTableNames($table,$name);

    if($this->findColumns($table))
    {
        $this->findPrimaryKeys($table);
        $this->findConstraints($table);
        return $table;
    }
    else
        return null;
}

Creates a table instance representing the metadata for the named table.

quoteSimpleColumnName() method
public string quoteSimpleColumnName(string $name)
$name string column name
{return} string the properly quoted column name
Source Code: framework/db/schema/cubrid/CCubridSchema.php#56 (show)
public function quoteSimpleColumnName($name)
{
    return '`'.$name.'`';
}

Quotes a column name for use in a query. A simple column name does not contain prefix.

quoteSimpleTableName() method
public string quoteSimpleTableName(string $name)
$name string table name
{return} string the properly quoted table name
Source Code: framework/db/schema/cubrid/CCubridSchema.php#45 (show)
public function quoteSimpleTableName($name)
{
    return '`'.$name.'`';
}

Quotes a table name for use in a query. A simple table name does not schema prefix.

resetSequence() method
public void resetSequence(CDbTableSchema $table, mixed $value=NULL)
$table CDbTableSchema the table schema whose primary key sequence will be reset
$value mixed the value for the primary key of the next new row inserted. If this is not set, the next new row's primary key will have a value 1.
Source Code: framework/db/schema/cubrid/CCubridSchema.php#82 (show)
public function resetSequence($table,$value=null)
{
    if($table->sequenceName!==null)
    {
        if($value===null)
            $value=$this->getDbConnection()->createCommand("SELECT MAX(`{$table->primaryKey}`) FROM {$table->rawName}")->queryScalar()+1;
        else
            $value=(int)$value;
        $this->getDbConnection()->createCommand("ALTER TABLE {$table->rawName} AUTO_INCREMENT=$value")->execute();
    }
}

Resets the sequence value of a table's primary key. The sequence will be reset such that the primary key of the next new row inserted will have the specified value or 1.

resolveTableNames() method
protected void resolveTableNames(CCubridTableSchema $table, string $name)
$table CCubridTableSchema the table instance
$name string the unquoted table name
Source Code: framework/db/schema/cubrid/CCubridSchema.php#119 (show)
protected function resolveTableNames($table,$name)
{
    $parts=explode('.',str_replace('`','',$name));
    if(isset($parts[1]))
    {
        $table->schemaName=$parts[0];
        $table->name=$parts[1];
        $table->rawName=$this->quoteTableName($table->schemaName).'.'.$this->quoteTableName($table->name);
    }
    else
    {
        $table->name=$parts[0];
        $table->rawName=$this->quoteTableName($table->name);
    }
}

Generates various kinds of table names.