MDB2_Driver_Reverse_Common Class Reference

Inheritance diagram for MDB2_Driver_Reverse_Common:

Collaboration diagram for MDB2_Driver_Reverse_Common:

Public Member Functions
	getTableFieldDefinition ($table, $field)
	Get the structure of a field into an array. More...
	getTableIndexDefinition ($table, $index)
	Get the structure of an index into an array. More...
	getTableConstraintDefinition ($table, $index)
	Get the structure of an constraints into an array. More...
	getSequenceDefinition ($sequence)
	Get the structure of a sequence into an array. More...
	getTriggerDefinition ($trigger)
	Get the structure of a trigger into an array. More...
	tableInfo ($result, $mode=null)
	Returns information about a table or a result set. More...
Public Member Functions inherited from MDB2_Module_Common
	__construct ($db_index)
	Constructor. More...
	MDB2_Module_Common ($db_index)
	PHP 4 Constructor. More...
&	getDBInstance ()
	Get the instance of MDB2 associated with the module instance. More...

Additional Inherited Members
Data Fields inherited from MDB2_Module_Common
	$db_index

Detailed Description

Definition at line 70 of file Common.php.

Member Function Documentation

getSequenceDefinition()

MDB2_Driver_Reverse_Common::getSequenceDefinition

(

$sequence

)

Get the structure of a sequence into an array.

Parameters

string

$sequence

name of sequence that should be used in method

Returns

mixed data array on success, a MDB2 error on failure The returned array has this structure:

         array (
             [start] => n
         );
         

public

Definition at line 182 of file Common.php.

References array, MDB2_Module_Common\getDBInstance(), and PEAR\isError().

    {
        $db =& $this->getDBInstance();
        if (PEAR::isError($db)) {
            return $db;
        }

        $start = $db->currId($sequence);
        if (PEAR::isError($start)) {
            return $start;
        }
        if ($db->supports('current_id')) {
            $start++;
        } else {
            $db->warnings[] = 'database does not support getting current
                sequence value, the sequence value was incremented';
        }
        $definition = array();
        if ($start != 1) {
            $definition = array('start' => $start);
        }
        return $definition;
    }

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getTableConstraintDefinition()

MDB2_Driver_Reverse_Common::getTableConstraintDefinition	(		$table,
			$index
	)

Get the structure of an constraints into an array.

Parameters

string	$table	name of table that should be used in method
string	$index	name of index that should be used in method

Returns

mixed data array on success, a MDB2 error on failure The returned array has this structure:

         array (
             [primary] => 1
             [fields] => array (
                 [field1name] => array() // one entry per each field covered
                 [field2name] => array() // by the index
                 [field3name] => array(
                     [sorting] => ascending
                 )
             )
         );
         

public

Definition at line 155 of file Common.php.

References MDB2_Module_Common\getDBInstance(), PEAR\isError(), and MDB2_ERROR_UNSUPPORTED.

Referenced by tableInfo().

    {
        $db =& $this->getDBInstance();
        if (PEAR::isError($db)) {
            return $db;
        }

        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
            'method not implemented', __FUNCTION__);
    }

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getTableFieldDefinition()

MDB2_Driver_Reverse_Common::getTableFieldDefinition	(		$table,
			$field
	)

Get the structure of a field into an array.

Parameters

string	$table	name of table that should be used in method
string	$field	name of field that should be used in method

Returns

mixed data array on success, a MDB2 error on failure. The returned array contains an array for each field definition, with all or some of these indices, depending on the field data type: [notnull] [nativetype] [length] [fixed] [default] [type] [mdb2type] public

Definition at line 86 of file Common.php.

References MDB2_Module_Common\getDBInstance(), PEAR\isError(), and MDB2_ERROR_UNSUPPORTED.

Referenced by tableInfo().

    {
        $db =& $this->getDBInstance();
        if (PEAR::isError($db)) {
            return $db;
        }

        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
            'method not implemented', __FUNCTION__);
    }

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getTableIndexDefinition()

MDB2_Driver_Reverse_Common::getTableIndexDefinition	(		$table,
			$index
	)

Get the structure of an index into an array.

Parameters

string	$table	name of table that should be used in method
string	$index	name of index that should be used in method

Returns

mixed data array on success, a MDB2 error on failure The returned array has this structure: array ( [fields] => array ( [field1name] => array() // one entry per each field covered [field2name] => array() // by the index [field3name] => array( [sorting] => ascending ) ) ); public

Definition at line 120 of file Common.php.

References MDB2_Module_Common\getDBInstance(), PEAR\isError(), and MDB2_ERROR_UNSUPPORTED.

Referenced by tableInfo().

    {
        $db =& $this->getDBInstance();
        if (PEAR::isError($db)) {
            return $db;
        }

        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
            'method not implemented', __FUNCTION__);
    }

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getTriggerDefinition()

MDB2_Driver_Reverse_Common::getTriggerDefinition

(

$trigger

)

Get the structure of a trigger into an array.

EXPERIMENTAL

WARNING: this function is experimental and may change the returned value at any time until labelled as non-experimental

Parameters

string

$trigger

name of trigger that should be used in method

Returns

mixed data array on success, a MDB2 error on failure The returned array has this structure:

         array (
             [trigger_name]    => 'trigger name',
             [table_name]      => 'table name',
             [trigger_body]    => 'trigger body definition',
             [trigger_type]    => 'BEFORE' | 'AFTER',
             [trigger_event]   => 'INSERT' | 'UPDATE' | 'DELETE'
                 //or comma separated list of multiple events, when supported
             [trigger_enabled] => true|false
             [trigger_comment] => 'trigger comment',
         );
         

The oci8 driver also returns a [when_clause] index. public

Definition at line 235 of file Common.php.

References MDB2_Module_Common\getDBInstance(), PEAR\isError(), and MDB2_ERROR_UNSUPPORTED.

    {
        $db =& $this->getDBInstance();
        if (PEAR::isError($db)) {
            return $db;
        }

        return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
            'method not implemented', __FUNCTION__);
    }

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tableInfo()

MDB2_Driver_Reverse_Common::tableInfo	(		$result,
			$mode = null
	)

Returns information about a table or a result set.

The format of the resulting array depends on which $mode you select. The sample output below is based on this query:

   SELECT tblFoo.fldID, tblFoo.fldPhone, tblBar.fldId
   FROM tblFoo
   JOIN tblBar ON tblFoo.fldId = tblBar.fldId

• null (default)

    [0] => Array (
        [table] => tblFoo
        [name] => fldId
        [type] => int
        [len] => 11
        [flags] => primary_key not_null
    )
    [1] => Array (
        [table] => tblFoo
        [name] => fldPhone
        [type] => string
        [len] => 20
        [flags] =>
    )
    [2] => Array (
        [table] => tblBar
        [name] => fldId
        [type] => int
        [len] => 11
        [flags] => primary_key not_null
    )
    

• MDB2_TABLEINFO_ORDER

  In addition to the information found in the default output, a notation of the number of columns is provided by the <samp>num_fields</samp> element while the <samp>order</samp> element provides an array with the column names as the keys and their location index number (corresponding to the keys in the the default output) as the values.

  If a result set has identical field names, the last one is used.

    [num_fields] => 3
    [order] => Array (
        [fldId] => 2
        [fldTrans] => 1
    )
    

• MDB2_TABLEINFO_ORDERTABLE

  Similar to MDB2_TABLEINFO_ORDER but adds more dimensions to the array in which the table names are keys and the field names are sub-keys. This is helpful for queries that join tables which have identical field names.

    [num_fields] => 3
    [ordertable] => Array (
        [tblFoo] => Array (
            [fldId] => 0
            [fldPhone] => 1
        )
        [tblBar] => Array (
            [fldId] => 2
        )
    )
    

The <samp>flags</samp> element contains a space separated list of extra information about the field. This data is inconsistent between DBMS's due to the way each DBMS works.

• <samp>primary_key</samp>
• <samp>unique_key</samp>
• <samp>multiple_key</samp>
• <samp>not_null</samp>

Most DBMS's only provide the <samp>table</samp> and <samp>flags</samp> elements if $result is a table name. The following DBMS's provide full information from queries:

• fbsql
• mysql

If the 'portability' option has <samp>MDB2_PORTABILITY_FIX_CASE</samp> turned on, the names of tables and fields will be lower or upper cased.

Parameters

object | string	$result	MDB2_result object from a query or a string containing the name of a table. While this also accepts a query result resource identifier, this behavior is deprecated.
int	$mode	either unused or one of the tableInfo modes: MDB2_TABLEINFO_ORDERTABLE, MDB2_TABLEINFO_ORDER or MDB2_TABLEINFO_FULL (which does both). These are bitwise, so the first two can be combined using |.

Returns

array an associative array with the information requested. A MDB2_Error object on failure.

See also

MDB2_Driver_Common::setOption()

Definition at line 369 of file Common.php.

References $i, $index, $res, $result, array, MDB2_Module_Common\getDBInstance(), getTableConstraintDefinition(), getTableFieldDefinition(), getTableIndexDefinition(), PEAR\isError(), MDB2_ERROR_UNSUPPORTED, MDB2_TABLEINFO_ORDER, and MDB2_TABLEINFO_ORDERTABLE.

    {
        $db =& $this->getDBInstance();
        if (PEAR::isError($db)) {
            return $db;
        }

        if (!is_string($result)) {
            return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
                'method not implemented', __FUNCTION__);
        }

        $db->loadModule('Manager', null, true);
        $fields = $db->manager->listTableFields($result);
        if (PEAR::isError($fields)) {
            return $fields;
        }

        $flags = array();

        $idxname_format = $db->getOption('idxname_format');
        $db->setOption('idxname_format', '%s');

        $indexes = $db->manager->listTableIndexes($result);
        if (PEAR::isError($indexes)) {
            $db->setOption('idxname_format', $idxname_format);
            return $indexes;
        }

        foreach ($indexes as $index) {
            $definition = $this->getTableIndexDefinition($result, $index);
            if (PEAR::isError($definition)) {
                $db->setOption('idxname_format', $idxname_format);
                return $definition;
            }
            if (count($definition['fields']) > 1) {
                foreach ($definition['fields'] as $field => $sort) {
                    $flags[$field] = 'multiple_key';
                }
            }
        }

        $constraints = $db->manager->listTableConstraints($result);
        if (PEAR::isError($constraints)) {
            return $constraints;
        }

        foreach ($constraints as $constraint) {
            $definition = $this->getTableConstraintDefinition($result, $constraint);
            if (PEAR::isError($definition)) {
                $db->setOption('idxname_format', $idxname_format);
                return $definition;
            }
            $flag = !empty($definition['primary'])
                ? 'primary_key' : (!empty($definition['unique'])
                    ? 'unique_key' : false);
            if ($flag) {
                foreach ($definition['fields'] as $field => $sort) {
                    if (empty($flags[$field]) || $flags[$field] != 'primary_key') {
                        $flags[$field] = $flag;
                    }
                }
            }
        }

        if ($mode) {
            $res['num_fields'] = count($fields);
        }

        foreach ($fields as $i => $field) {
            $definition = $this->getTableFieldDefinition($result, $field);
            if (PEAR::isError($definition)) {
                $db->setOption('idxname_format', $idxname_format);
                return $definition;
            }
            $res[$i] = $definition[0];
            $res[$i]['name'] = $field;
            $res[$i]['table'] = $result;
            $res[$i]['type'] = preg_replace('/^([a-z]+).*$/i', '\\1', trim($definition[0]['nativetype']));
            // 'primary_key', 'unique_key', 'multiple_key'
            $res[$i]['flags'] = empty($flags[$field]) ? '' : $flags[$field];
            // not_null', 'unsigned', 'auto_increment', 'default_[rawencodedvalue]'
            if (!empty($res[$i]['notnull'])) {
                $res[$i]['flags'].= ' not_null';
            }
            if (!empty($res[$i]['unsigned'])) {
                $res[$i]['flags'].= ' unsigned';
            }
            if (!empty($res[$i]['auto_increment'])) {
                $res[$i]['flags'].= ' autoincrement';
            }
            if (!empty($res[$i]['default'])) {
                $res[$i]['flags'].= ' default_'.rawurlencode($res[$i]['default']);
            }

            if ($mode & MDB2_TABLEINFO_ORDER) {
                $res['order'][$res[$i]['name']] = $i;
            }
            if ($mode & MDB2_TABLEINFO_ORDERTABLE) {
                $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
            }
        }

        $db->setOption('idxname_format', $idxname_format);
        return $res;
    }

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The documentation for this class was generated from the following file:

• Services/Database/lib/PEAR/MDB2/Driver/Reverse/Common.php