Docs For Class MDB2_Driver

MDB2_Driver_mysql __construct(
)

Constructor

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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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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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true connect(
)

Connect to the database

Return: on success, MDB2 Error Object on failure

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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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mixed disconnect(
[boolean
$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:

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

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array errorInfo(
[integer
$error = null])

This method is used to collect information about an error

Access: public

Parameters:

integer $error —

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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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mixed getServerVersion(
[bool
$native = false])

return version information about the server

Return: array/string with version information or MDB2 error object
Access: public

Parameters:

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

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

Returns the next free id of a sequence

Return: MDB2 Error Object or id
Access: public

Parameters:

string	`$seq_name`	—	name of the sequence
boolean	`$ondemand`	—	when true the sequence is automatic created, if it not exists

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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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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 implements it natively, this type of query is emulated 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 Metabase are supported except for clob and blob.

Default: no type conversion

null Boolean 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 Boolean 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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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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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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mixed setTransactionIsolation(
string
$isolation)

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)

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

Execute a query

Return: or error object
Access: protected

Parameters:

string	`$query`	—	query
boolean	`$is_manip`	—	if the query is a manipulation query
resource	`$connection`	—
string	`$database_name`	—

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string _modifyQuery(
string
$query, boolean
$is_manip, integer
$limit, integer
$offset)

Changes a query string for various DBMS specific reasons

Return: modified query
Access: protected

Parameters:

string	`$query`	—	query to modify
boolean	`$is_manip`	—	if it is a DML query
integer	`$limit`	—	limit the number of rows
integer	`$offset`	—	start reading from given offset

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integer _skipUserDefinedVariable(
string
$query, integer
$position)

Utility method, used by prepare() to avoid misinterpreting MySQL user defined variables (SELECT @x:=5) for placeholders.

Check if the placeholder is a false positive, i.e. if it is an user defined variable instead. If so, skip it and advance the position, otherwise return the current position, which is valid

Access: protected

Parameters:

string	`$query`	—
integer	`$position`	—	current string cursor position

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Class: MDB2_Driver_mysql

Class Overview

Author(s):

Variables

Methods

Inherited Variables

Inherited Methods

Class Details

Class Variables

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

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

$start_transaction = false

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

$varchar_max_length = 255

Method Detail

__construct (Constructor) [line 78]

beginTransaction [line 214]

Parameters:

commit [line 259]

Parameters:

connect [line 391]

currID [line 1096]

Parameters:

disconnect [line 534]

Parameters:

errorInfo [line 118]

Parameters:

escape [line 190]

Parameters:

getServerVersion [line 689]

Parameters:

lastInsertID [line 1080]

Parameters:

nextID [line 1036]

Parameters:

prepare [line 815]

Parameters:

replace [line 977]

Parameters:

rollback [line 313]

Parameters:

setCharset [line 510]

Parameters:

setTransactionIsolation [line 361]

Parameters:

_doQuery [line 569]

Parameters:

_modifyQuery [line 653]

Parameters:

_skipUserDefinedVariable [line 778]

Parameters:

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