MDB2
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Class: MDB2_Driver_Common

Source Location: /MDB2-2.4.1/MDB2.php

Class Overview

PEAR
   |
   --MDB2_Driver_Common

MDB2_Driver_Common: Base class that is extended by each MDB2 driver


Author(s):

Variables

Methods


Inherited Variables

Inherited Methods


Class Details

[line 989]
MDB2_Driver_Common: Base class that is extended by each MDB2 driver


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Class Variables

$as_keyword =  ' AS '

[line 1197]

column alias keyword
  • Access: protected

Type:   string


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$connected_database_name =  ''

[line 1040]

the name of the database currently selected
  • Access: protected

Type:   string


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$connected_dsn = array()

[line 1012]

DSN that was used to create the current connection
  • Access: protected

Type:   array


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$connected_server_info =  ''

[line 1047]

server version information
  • Access: protected

Type:   string


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$connection =  0

[line 1019]

connection resource
  • Access: protected

Type:   mixed


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$database_name =  ''

[line 1033]

the name of the database for the next query
  • Access: protected

Type:   string


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$dbsyntax =

[line 1260]

Database used with regards to SQL syntax etc.
  • Access: public

Type:   string


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$db_index =  0

[line 998]

index of the MDB2 object within the $GLOBALS['_MDB2_databases'] array
  • Access: public

Type:   int


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$debug_output =  ''

[line 1211]

string with the debugging information
  • Access: public

Type:   string


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$destructor_registered =  true

[line 1288]

determines of the PHP4 destructor emulation has been enabled yet
  • Access: protected

Type:   array


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$dsn = array()

[line 1005]

DSN used for the next query
  • Access: protected

Type:   array


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$fetchmode =  MDB2_FETCHMODE_ORDERED

[line 1274]

the default fetchmode used
  • Access: protected

Type:   int


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$has_transaction_error =  false

[line 1232]

the first error that occured inside a nested transaction
  • Access: protected

Type:   MDB2_Error|bool


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$identifier_quoting = array('start' => '"', 'end' => '"', 'escape' => '"')

[line 1173]

identifier quoting
  • Access: protected

Type:   array


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$in_transaction =  false

[line 1218]

determine if there is an open transaction
  • Access: protected

Type:   bool


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$last_query =

[line 1267]

the last query sent to the driver
  • Access: public

Type:   string


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$limit =  0

[line 1246]

result limit used in the next query
  • Access: protected

Type:   int


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$modules = array()

[line 1281]

array of module instances
  • Access: protected

Type:   array


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$nested_transaction_counter =  null

[line 1225]

the smart transaction nesting depth
  • Access: protected

Type:   int


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$offset =  0

[line 1239]

result offset used in the next query
  • Access: protected

Type:   int


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$opened_persistent =

[line 1026]

if the current opened connection is a persistent connection
  • Access: protected

Type:   bool


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$options = array(
        'ssl' => false,
        'field_case' => CASE_LOWER,
        'disable_query' => false,
        'result_class' => 'MDB2_Result_%s',
        'buffered_result_class' => 'MDB2_BufferedResult_%s',
        'result_wrap_class' => false,
        'result_buffering' => true,
        'fetch_class' => 'stdClass',
        'persistent' => false,
        'debug' => 0,
        'debug_handler' => 'MDB2_defaultDebugOutput',
        'debug_expanded_output' => false,
        'default_text_field_length' => 4096,
        'lob_buffer_length' => 8192,
        'log_line_break' => "\n",
        'idxname_format' => '%s_idx',
        'seqname_format' => '%s_seq',
        'savepoint_format' => 'MDB2_SAVEPOINT_%s',
        'statement_format' => 'MDB2_STATEMENT_%1$s_%2$s',
        'seqcol_name' => 'sequence',
        'quote_identifier' => false,
        'use_transactions' => true,
        'decimal_places' => 2,
        'portability' => MDB2_PORTABILITY_ALL,
        'modules' => array(
            'ex' => 'Extended',
            'dt' => 'Datatype',
            'mg' => 'Manager',
            'rv' => 'Reverse',
            'na' => 'Native',
            'fc' => 'Function',
        ),'emulate_prepared'=>false,'datatype_map'=>array(),'datatype_map_callback'=>array(),'nativetype_map_callback'=>array(),)

[line 1122]

Array of supported options that can be passed to the MDB2 instance.

The options can be set during object creation, using MDB2::connect(), MDB2::factory() or MDB2::singleton(). The options can also be set after the object is created, using MDB2::setOptions() or MDB2_Driver_Common::setOption(). The list of available option includes:

  • $options['ssl'] -> boolean: determines if ssl should be used for connections
  • $options['field_case'] -> CASE_LOWER|CASE_UPPER: determines what case to force on field/table names
  • $options['disable_query'] -> boolean: determines if queries should be executed
  • $options['result_class'] -> string: class used for result sets
  • $options['buffered_result_class'] -> string: class used for buffered result sets
  • $options['result_wrap_class'] -> string: class used to wrap result sets into
  • $options['result_buffering'] -> boolean should results be buffered or not?
  • $options['fetch_class'] -> string: class to use when fetch mode object is used
  • $options['persistent'] -> boolean: persistent connection?
  • $options['debug'] -> integer: numeric debug level
  • $options['debug_handler'] -> string: function/method that captures debug messages
  • $options['debug_expanded_output'] -> bool: BC option to determine if more context information should be send to the debug handler
  • $options['default_text_field_length'] -> integer: default text field length to use
  • $options['lob_buffer_length'] -> integer: LOB buffer length
  • $options['log_line_break'] -> string: line-break format
  • $options['idxname_format'] -> string: pattern for index name
  • $options['seqname_format'] -> string: pattern for sequence name
  • $options['savepoint_format'] -> string: pattern for auto generated savepoint names
  • $options['statement_format'] -> string: pattern for prepared statement names
  • $options['seqcol_name'] -> string: sequence column name
  • $options['quote_identifier'] -> boolean: if identifier quoting should be done when check_option is used
  • $options['use_transactions'] -> boolean: if transaction use should be enabled
  • $options['decimal_places'] -> integer: number of decimal places to handle
  • $options['portability'] -> integer: portability constant
  • $options['modules'] -> array: short to long module name mapping for __call()
  • $options['emulate_prepared'] -> boolean: force prepared statements to be emulated
  • $options['datatype_map'] -> array: map user defined datatypes to other primitive datatypes
  • $options['datatype_map_callback'] -> array: callback function/method that should be called


Type:   array


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$phptype =

[line 1253]

Database backend used in PHP (mysql, odbc etc.)
  • Access: public

Type:   string


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$sql_comments = array(
        array('start' => '--', 'end' => "\n", 'escape' => false),array('start'=>'/*','end'=>'*/','escape'=>false),)

[line 1180]

sql comments
  • Access: protected

Type:   array


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$string_quoting = array('start' => "'", 'end' => "'", 'escape' => false, 'escape_pattern' => false)

[line 1166]

string array
  • Access: protected

Type:   string


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$supported = array(
        'sequences' => false,
        'indexes' => false,
        'affected_rows' => false,
        'summary_functions' => false,
        'order_by_text' => false,
        'transactions' => false,
        'savepoints' => false,
        'current_id' => false,
        'limit_queries' => false,
        'LOBs' => false,
        'replace' => false,
        'sub_selects' => false,
        'auto_increment' => false,
        'primary_key' => false,
        'result_introspection' => false,
        'prepared_statements' => false,
        'identifier_quoting' => false,
        'pattern_escaping' => false,
        'new_link' => false,
    )

[line 1054]

list of all supported features of the given driver
  • Access: public

Type:   array


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$warnings = array()

[line 1204]

warnings
  • Access: protected

Type:   array


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$wildcards = array('%', '_')

[line 1190]

comparision wildcards
  • Access: protected

Type:   array


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Method Detail

MDB2_Driver_Common (Constructor)   [line 1310]

MDB2_Driver_Common MDB2_Driver_Common( )

PHP 4 Constructor

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__construct (Constructor)   [line 1296]

MDB2_Driver_Common __construct( )

Constructor

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__destruct (Destructor)   [line 1322]

void __destruct( )

Destructor

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beginNestedTransaction   [line 2063]

mixed beginNestedTransaction( )

Start a nested transaction.

EXPERIMENTAL

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

  • Return: MDB2_OK on success/savepoint name, a MDB2 error on failure
  • Since: 2.1.1
  • Access: public

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beginTransaction   [line 1950]

mixed beginTransaction( [string $savepoint = null])

Start a transaction or set a savepoint.
  • Return: MDB2_OK on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $savepoint     name of a savepoint to set

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commit   [line 1971]

mixed commit( [string $savepoint = null])

Commit the database changes done during a transaction that is in progress or release a savepoint. This function may only be called when auto-committing is disabled, otherwise it will fail. Therefore, a new transaction is implicitly started after committing the pending changes.
  • Return: MDB2_OK on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $savepoint     name of a savepoint to release

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compareDefinition   [line 3057]

array compareDefinition( array $current, array $previous)

Obtain an array of changes that may need to applied
  • Return: containing all changes that will need to be applied
  • Access: public

Parameters:

array   $current     new definition
array   $previous     old definition

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completeNestedTransaction   [line 2099]

mixed completeNestedTransaction( [bool $force_rollback = false])

Finish a nested transaction by rolling back if an error occured or committing otherwise.

EXPERIMENTAL

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

  • Return: MDB_OK on commit/counter decrementing, false on rollback and a MDB2 error on failure
  • Since: 2.1.1
  • Access: public

Parameters:

bool   $force_rollback     if the transaction should be rolled back regardless even if no error was set within the nested transaction

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connect   [line 2199]

true connect( )

Connect to the database
  • Return: on success, MDB2 Error Object on failure

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currID   [line 3177]

mixed currID( string $seq_name)

Returns the current id of a sequence
  • Return: MDB2 Error Object or id
  • Access: public

Parameters:

string   $seq_name     name of the sequence

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debug   [line 1582]

void debug( string $message, [string $scope = ''], [array $context = array()])

set a debug message
  • Access: public

Parameters:

string   $message     message that should be appended to the debug variable
string   $scope     usually the method name that triggered the debug call: for example 'query', 'prepare', 'execute', 'parameters', 'beginTransaction', 'commit', 'rollback'
array   $context     contains context information about the debug() call common keys are: is_manip, time, result etc.

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disconnect   [line 2236]

mixed disconnect( [bool $force = true])

Log out and disconnect from the database.
  • Return: true on success, false if not connected and error object on error
  • Access: public

Parameters:

bool   $force     if the disconnect should be forced even if the connection is opened persistently

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errorInfo   [line 1376]

array errorInfo( [mixed $error = null])

This method is used to collect information about an error
  • Return: with MDB2 errorcode, native error code, native message
  • Access: public

Parameters:

mixed   $error     error code or resource

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escape   [line 1625]

string escape( string $text, [bool $escape_wildcards = false])

Quotes a string so it can be safely used in a query. It will quote the text so it can safely be used within a query.
  • Return: quoted string
  • Access: public

Parameters:

string   $text     the input string to quote
bool   $escape_wildcards     escape wildcards

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escapePattern   [line 1652]

string escapePattern( string $text)

Quotes pattern (% and _) characters in a string)

EXPERIMENTAL

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

  • Return: quoted string
  • Access: public

Parameters:

string   $text     the input string to quote

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exec   [line 2465]

mixed &exec( string $query)

Execute a manipulation query to the database and return the number of affected rows
  • Return: number of affected rows on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $query     the SQL query

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failNestedTransaction   [line 2156]

bool failNestedTransaction( [mixed $error = null], [bool $immediately = false])

Force setting nested transaction to failed.

EXPERIMENTAL

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

  • Return: MDB2_OK
  • Since: 2.1.1
  • Access: public

Parameters:

mixed   $error     value to return in getNestededTransactionError()
bool   $immediately     if the transaction should be rolled back immediately

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free   [line 1337]

bool free( )

Free the internal references so that the instance can be destroyed
  • Return: true on success, false if result is invalid
  • Access: public

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getAsKeyword   [line 1717]

string getAsKeyword( )

Gets the string to alias column
  • Return: to use when aliasing a column

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getConnection   [line 1733]

mixed getConnection( )

Returns a native connection
  • Return: a valid MDB2 connection object, or a MDB2 error object on error
  • Access: public

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getDatabase   [line 2278]

string getDatabase( )

Get the current database
  • Return: name of the database
  • Access: public

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getDebugOutput   [line 1606]

string getDebugOutput( )

output debug info
  • Return: content of the debug_output class variable
  • Access: public

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getDeclaration   [line 3035]

string getDeclaration( string $type, string $name, string $field)

Obtain DBMS specific SQL code portion needed to declare of the given type
  • Return: DBMS specific SQL code portion that should be used to declare the specified field.
  • Access: public

Parameters:

string   $type     type to which the value should be converted to
string   $name     name the field to be declared.
string   $field     definition of the field

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getDSN   [line 2320]

mixed getDSN( [string $type = 'string'], [string $hidepw = false])

return the DSN as a string
  • Return: DSN in the chosen type
  • Access: public

Parameters:

string   $type     format to return ("array", "string")
string   $hidepw     string to hide the password with

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getIndexName   [line 3120]

string getIndexName( string $idx)

adds index name formatting to a index name
  • Return: formatted index name
  • Access: public

Parameters:

string   $idx     name of the index

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getNestedTransactionError   [line 2186]

MDB2_Error|bool getNestedTransactionError( )

The first error that occured since the transaction start.

EXPERIMENTAL

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

  • Return: MDB2 error object if an error occured or false.
  • Since: 2.1.1
  • Access: public

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getOption   [line 1556]

mixed getOption( string $option)

Returns the value of an option
  • Return: the option value or error object
  • Access: public

Parameters:

string   $option     option name

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getSequenceName   [line 3102]

string getSequenceName( string $sqn)

adds sequence name formatting to a sequence name
  • Return: formatted sequence name
  • Access: public

Parameters:

string   $sqn     name of the sequence

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getServerVersion   [line 2612]

mixed getServerVersion( [bool $native = false])

return version information about the server
  • Return: array with version information or row string
  • Access: public

Parameters:

bool   $native     determines if the raw version string should be returned

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getWarnings   [line 1477]

array getWarnings( )

Get all warnings in reverse order.

This means that the last warning is the first element in the array


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inTransaction   [line 2013]

int|bool inTransaction( [bool $ignore_nested = false])

If a transaction is currently open.
  • Return: - an integer with the nesting depth is returned if a nested transaction is open
    • true is returned for a normal open transaction
    • false is returned if no transaction is open
  • Access: public

Parameters:

bool   $ignore_nested     if the nested transaction count should be ignored

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lastInsertID   [line 3159]

mixed lastInsertID( [string $table = null], [string $field = null])

Returns the autoincrement ID if supported or $id or fetches the current ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
  • Return: MDB2 Error Object or id
  • Access: public

Parameters:

string   $table     name of the table into which a new row was inserted
string   $field     name of the field into which a new row was inserted

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loadModule   [line 1840]

object on &loadModule( string $module, [string $property = null], [bool $phptype_specific = null])

loads a module
  • Return: success a reference to the given module is returned and on failure a PEAR error
  • Access: public

Parameters:

string   $module     name of the module that should be loaded (only used for error messages)
string   $property     name of the property into which the class will be loaded
bool   $phptype_specific     if the class to load for the module is specific to the phptype

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nextID   [line 3139]

mixed nextID( string $seq_name, [bool $ondemand = true])

Returns the next free id of a sequence
  • Return: MDB2 Error Object or id
  • Access: public

Parameters:

string   $seq_name     name of the sequence
bool   $ondemand     when true missing sequences are automatic created

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prepare   [line 2855]

mixed &prepare( string $query, [mixed $types = null], [mixed $result_types = null], [mixed $lobs = array()])

Prepares a query for multiple execution with execute().

With some database backends, this is emulated. prepare() requires a generic query as string like 'INSERT INTO numbers VALUES(?,?)' or 'INSERT INTO numbers VALUES(:foo,:bar)'. The ? and :[a-zA-Z] and are placeholders which can be set using bindParam() and the query can be send off using the execute() method.

  • Return: resource handle for the prepared query on success, a MDB2 error on failure
  • See: bindParam, execute
  • Access: public

Parameters:

string   $query     the query to prepare
mixed   $types     array that contains the types of the placeholders
mixed   $result_types     array that contains the types of the columns in the result set or MDB2_PREPARE_RESULT, if set to MDB2_PREPARE_MANIP the query is handled as a manipulation query
mixed   $lobs     key (field) value (parameter) pair for all lob placeholders

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query   [line 2502]

mixed &query( string $query, [mixed $types = null], [mixed $result_class = true], [mixed $result_wrap_class = false])

Send a query to the database and return any results
  • Return: an MDB2_Result handle on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $query     the SQL query
mixed   $types     array that contains the types of the columns in the result set
mixed   $result_class     string which specifies which result class to use
mixed   $result_wrap_class     string which specifies which class to wrap results in

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queryAll   [line 3303]

mixed queryAll( string $query, [array $types = null], [int $fetchmode = MDB2_FETCHMODE_DEFAULT], [bool $rekey = false], [bool $force_array = false], [bool $group = false])

Execute the specified query, fetch all the rows of the result set into a two dimensional array and then frees the result set.
  • Return: MDB2_OK or data array on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $query     the SELECT query statement to be executed.
array   $types     optional array argument that specifies a list of expected datatypes of the result set columns, so that the eventual conversions may be performed. The default list of datatypes is empty, meaning that no conversion is performed.
int   $fetchmode     how the array data should be indexed
bool   $rekey     if set to true, the $all will have the first column as its first dimension
bool   $force_array     used only when the query returns exactly two columns. If true, the values of the returned array will be one-element arrays instead of scalars.
bool   $group     if true, the values of the returned array is wrapped in another array. If the same key value (in the first column) repeats itself, the values will be appended to this array instead of overwriting the existing values.

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queryCol   [line 3264]

mixed queryCol( string $query, [string $type = null], [int $colnum = 0])

Execute the specified query, fetch the value from the first column of each row of the result set into an array and then frees the result set.
  • Return: MDB2_OK or data array on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $query     the SELECT query statement to be executed.
string   $type     optional argument that specifies the expected datatype of the result set field, so that an eventual conversion may be performed. The default datatype is text, meaning that no conversion is performed
int   $colnum     the row number to fetch

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queryOne   [line 3203]

mixed queryOne( string $query, [string $type = null], [int $colnum = 0])

Execute the specified query, fetch the value from the first column of the first row of the result set and then frees the result set.
  • Return: MDB2_OK or field value on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $query     the SELECT query statement to be executed.
string   $type     optional argument that specifies the expected datatype of the result set field, so that an eventual conversion may be performed. The default datatype is text, meaning that no conversion is performed
int   $colnum     the column number to fetch

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queryRow   [line 3234]

mixed queryRow( string $query, [array $types = null], [int $fetchmode = MDB2_FETCHMODE_DEFAULT])

Execute the specified query, fetch the values from the first row of the result set into an array and then frees the result set.
  • Return: MDB2_OK or data array on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $query     the SELECT query statement to be executed.
array   $types     optional array argument that specifies a list of expected datatypes of the result set columns, so that the eventual conversions may be performed. The default list of datatypes is empty, meaning that no conversion is performed.
int   $fetchmode     how the array data should be indexed

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quote   [line 3009]

string quote( string $value, [string $type = null], [bool $quote = true], [bool $escape_wildcards = false])

Convert a text value into a DBMS specific format that is suitable to compose query statements.
  • Return: text string that represents the given argument value in a DBMS specific format.
  • Access: public

Parameters:

string   $value     text string value that is intended to be converted.
string   $type     type to which the value should be converted to
bool   $quote     quote
bool   $escape_wildcards     escape wildcards

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quoteIdentifier   [line 1700]

string quoteIdentifier( string $str, [bool $check_option = false])

Quote a string so it can be safely used as a table or column name

Delimiting style depends on which database driver is being used.

NOTE: just because you CAN use delimited identifiers doesn't mean you SHOULD use them. In general, they end up causing way more problems than they solve.

Portability is broken by using the following characters inside delimited identifiers:

  • backtick (`) -- due to MySQL
  • double quote (") -- due to Oracle
  • brackets ([ or ]) -- due to Access
Delimited identifiers are known to generally work correctly under the following drivers:
  • mssql
  • mysql
  • mysqli
  • oci8
  • pgsql
  • sqlite
InterBase doesn't seem to be able to use delimited identifiers via PHP 4. They work fine under PHP 5.

  • Return: quoted identifier string
  • Access: public

Parameters:

string   $str     identifier name to be quoted
bool   $check_option     check the 'quote_identifier' option

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raiseError   [line 1407]

PEAR_Error &raiseError( [mixed $code = null], [int $mode = null], [mixed $options = null], [string $userinfo = null], [string $method = null])

This method is used to communicate an error and invoke error callbacks etc. Basically a wrapper for PEAR::raiseError without the message string.
  • Return: instance of a PEAR Error object
  • See: PEAR_Error
  • Access: public

Parameters:

mixed   $code     integer error code, or a PEAR error object (all other parameters are ignored if this parameter is an object
int   $mode     error mode, see PEAR_Error docs
mixed   $options     If error mode is PEAR_ERROR_TRIGGER, this is the error level (E_USER_NOTICE etc). If error mode is PEAR_ERROR_CALLBACK, this is the callback function, either as a function name, or as an array of an object and method name. For other error modes this parameter is ignored.
string   $userinfo     Extra debug information. Defaults to the last query and native error code.
string   $method     name of the method that triggered the error

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replace   [line 2760]

mixed replace( string $table, array $fields)

Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT query, except that if there is already a row in the table with the same key field values, the REPLACE query just updates its values instead of inserting a new row.

The REPLACE type of query does not make part of the SQL standards. Since practically only MySQL and SQLite implement it natively, this type of query isemulated through this method for other DBMS using standard types of queries inside a transaction to assure the atomicity of the operation.

  • Return: MDB2_OK on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $table     name of the table on which the REPLACE query will be executed.
array   $fields     

associative array that describes the fields and the values that will be inserted or updated in the specified table. The indexes of the array are the names of all the fields of the table. The values of the array are also associative arrays that describe the values and other properties of the table fields.

Here follows a list of field properties that need to be specified:

value Value to be assigned to the specified field. This value may be of specified in database independent type format as this function can perform the necessary datatype conversions.

Default: this property is required unless the Null property is set to 1.

type Name of the type of the field. Currently, all types MDB2 are supported except for clob and blob.

Default: no type conversion

null bool property that indicates that the value for this field should be set to null.

The default value for fields missing in INSERT queries may be specified the definition of a table. Often, the default value is already null, but since the REPLACE may be emulated using an UPDATE query, make sure that all fields of the table are listed in this function argument array.

Default: 0

key bool property that indicates that this field should be handled as a primary key or at least as part of the compound unique index of the table that will determine the row that will updated if it exists or inserted a new row otherwise.

This function will fail if no key field is specified or if the value of a key field is set to null because fields that are part of unique index they may not be null.

Default: 0


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resetWarnings   [line 1460]

void resetWarnings( )

reset the warning array
  • Access: public

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rollback   [line 1992]

mixed rollback( [string $savepoint = null])

Cancel any database changes done during a transaction or since a specific savepoint that is in progress. This function may only be called when auto-committing is disabled, otherwise it will fail. Therefore, a new transaction is implicitly started after canceling the pending changes.
  • Return: MDB2_OK on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $savepoint     name of a savepoint to rollback to

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setCharset   [line 2216]

true setCharset( string $charset, [resource $connection = null])

Set the charset on the current connection
  • Return: on success, MDB2 Error Object on failure

Parameters:

string   $charset     charset
resource   $connection     connection handle

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setDatabase   [line 2260]

string setDatabase( string $name)

Select a different database
  • Return: name of the database previously connected to
  • Access: public

Parameters:

string   $name     name of the database that should be selected

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setDSN   [line 2295]

MDB2_OK setDSN( mixed $dsn)

set the DSN
  • Access: public

Parameters:

mixed   $dsn     DSN string or array

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setFetchMode   [line 1504]

mixed setFetchMode( int $fetchmode, [string $object_class = 'stdClass'])

Sets which fetch mode should be used by default on queries on this connection

Parameters:

int   $fetchmode     MDB2_FETCHMODE_ORDERED, MDB2_FETCHMODE_ASSOC or MDB2_FETCHMODE_OBJECT
string   $object_class     the class name of the object to be returned by the fetch methods when the MDB2_FETCHMODE_OBJECT mode is selected. If no class is specified by default a cast to object from the assoc array row will be done. There is also the possibility to use and extend the 'MDB2_row' class.

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setLimit   [line 2631]

mixed setLimit( string $limit, [string $offset = null])

set the range of the next query
  • Return: MDB2_OK on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $limit     number of rows to select
string   $offset     first row to select

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setOption   [line 1534]

mixed setOption( string $option, mixed $value)

set the option for the db class
  • Return: MDB2_OK or MDB2 Error Object
  • Access: public

Parameters:

string   $option     option name
mixed   $value     value for the option

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setTransactionIsolation   [line 2040]

mixed setTransactionIsolation( string $isolation, [array $options = array()])

Set the transacton isolation level.
  • Return: MDB2_OK on success, a MDB2 error on failure
  • Since: 2.1.1
  • Access: public

Parameters:

string   $isolation     standard isolation level READ UNCOMMITTED (allows dirty reads) READ COMMITTED (prevents dirty reads) REPEATABLE READ (prevents nonrepeatable reads) SERIALIZABLE (prevents phantom reads)
array   $options     some transaction options: 'wait' => 'WAIT' | 'NO WAIT' 'rw' => 'READ WRITE' | 'READ ONLY'

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standaloneQuery   [line 2360]

mixed &standaloneQuery( string $query, [mixed $types = null], [bool $is_manip = false])

execute a query as database administrator
  • Return: MDB2_OK on success, a MDB2 error on failure
  • Access: public

Parameters:

string   $query     the SQL query
mixed   $types     array that contains the types of the columns in the result set
bool   $is_manip     if the query is a manipulation query

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subSelect   [line 2669]

string subSelect( string $query, [string $type = false])

simple subselect emulation: leaves the query untouched for all RDBMS that support subselects
  • Return: the query
  • Access: public

Parameters:

string   $query     the SQL query for the subselect that may only return a column
string   $type     determines type of the field

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supports   [line 3081]

bool|string supports( string $feature)

Tell whether a DB implementation or its backend extension supports a given feature.
  • Return: if this DB implementation supports a given feature false means no, true means native, 'emulated' means emulated
  • Access: public

Parameters:

string   $feature     name of the feature (see the MDB2 class doc)

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_doQuery   [line 2419]

result &_doQuery( string $query, [bool $is_manip = false], [resource $connection = null], [string $database_name = null])

Execute a query
  • Return: or error object
  • Access: protected

Parameters:

string   $query     query
bool   $is_manip     if the query is a manipulation query
resource   $connection     connection handle
string   $database_name     database name

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_fixResultArrayValues   [line 1755]

void _fixResultArrayValues( array &$row, array $mode)

Do all necessary conversions on result arrays to fix DBMS quirks
  • Access: protected

Parameters:

array   &$row     the array to be fixed (passed by reference)
array   $mode     bit-wise addition of the required portability modes

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_modifyQuery   [line 2400]

string _modifyQuery( string $query, bool $is_manip, int $limit, int $offset)

Changes a query string for various DBMS specific reasons
  • Return: modified query
  • Access: protected

Parameters:

string   $query     query to modify
bool   $is_manip     if it is a DML query
int   $limit     limit the number of rows
int   $offset     start reading from given offset

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_skipDelimitedStrings   [line 2963]

mixed _skipDelimitedStrings( string $query, integer $position, integer $p_position)

Utility method, used by prepare() to avoid replacing placeholders within delimited strings.

Check if the placeholder is contained within a delimited string. If so, skip it and advance the position, otherwise return the current position, which is valid

  • Return: integer $new_position on success MDB2_Error on failure
  • Access: protected

Parameters:

string   $query     
integer   $position     current string cursor position
integer   $p_position     placeholder position

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_wrapResult   [line 2541]

mixed &_wrapResult( resource $result, [mixed $types = array()], [mixed $result_class = true], [mixed $result_wrap_class = false], [string $limit = null], [string $offset = null])

wrap a result set into the correct class
  • Return: an MDB2_Result, a MDB2 error on failure
  • Access: protected

Parameters:

resource   $result     result handle
mixed   $types     array that contains the types of the columns in the result set
mixed   $result_class     string which specifies which result class to use
mixed   $result_wrap_class     string which specifies which class to wrap results in
string   $limit     number of rows to select
string   $offset     first row to select

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__call   [line 1909]

mixed __call( string $method, array $params)

Calls a module method using the __call magic method
  • Return: Returned value.

Parameters:

string   $method     Method name.
array   $params     Arguments.

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__toString   [line 1354]

string __toString( )

String conversation
  • Return: representation of the object
  • Access: public

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Documentation generated on Thu, 03 May 2007 15:00:38 -0400 by phpDocumentor 1.3.0. PEAR Logo Copyright © PHP Group 2004.