class MySQLDatabase extends Database implements TransactionManager (View source)

MySQL connector class.

Supported indexes for {@link requireTable()}

You are advised to backup your tables if changing settings on an existing database connection_charset and charset should be equal, similarly so should connection_collation and collation

Traits

Provides extensions to this object to integrate it with standard config API methods.

Constants

PARTIAL_QUERY

FULL_QUERY

Properties

static private string $connection_charset

Default connection charset (may be overridden in $databaseConfig)

static private string $connection_collation

Default connection collation

static private string $charset

Default charset

static private string $sql_mode

SQL Mode used on connections to MySQL. Defaults to ANSI. For basic ORM compatibility, this setting must always include ANSI or ANSI_QUOTES.

static private string $collation

Default collation

Methods

getConnector()

Get the current connector

from  Database
setConnector(DBConnector $connector)

Injector injection point for connector dependency

from  Database
getSchemaManager()

Returns the current schema manager

from  Database
setSchemaManager(DBSchemaManager $schemaManager)

Injector injection point for schema manager

from  Database
getQueryBuilder()

Returns the current query builder

from  Database
setQueryBuilder(DBQueryBuilder $queryBuilder)

Injector injection point for schema manager

from  Database
query(string $sql, int $errorLevel = E_USER_ERROR)

Execute the given SQL query.

preparedQuery(string $sql, array $parameters, int $errorLevel = E_USER_ERROR)

Execute the given SQL parameterised query with the specified arguments

static 
setWhitelistQueryArray(array $whitelistArray)

Add the sql queries that need to be partially or fully matched

from  Database
static array
getWhitelistQueryArray()

Get the sql queries that need to be partially or fully matched

from  Database
int
getGeneratedID(string $table)

Get the autogenerated ID from the previous INSERT query.

from  Database
bool
isActive()

Determines if we are connected to a server AND have a valid database selected.

from  Database
string
escapeString(mixed $value)

Returns an escaped string. This string won't be quoted, so would be suitable for appending to other quoted strings.

from  Database
string
quoteString(mixed $value)

Wrap a string into DB-specific quotes.

from  Database
string
escapeIdentifier(string|array $value, string $separator = '.')

Escapes an identifier (table / database name). Typically the value is simply double quoted. Don't pass in already escaped identifiers in, as this will double escape the value!

from  Database
manipulate(array $manipulation)

Execute a complex manipulation on the database.

from  Database
quiet()

Enable supression of database messages.

from  Database
clearAllData()

Clear all data out of the database

from  Database
clearTable(string $table)

Clear all data in a given table

string
nullCheckClause(string $field, bool $isNull)

Generates a WHERE clause for null comparison check

from  Database
string
comparisonClause(string $field, string $value, bool $exact = false, bool $negate = false, bool $caseSensitive = null, bool $parameterised = false)

Generate a WHERE clause for text matching.

string
formattedDatetimeClause(string $date, string $format)

function to return an SQL datetime expression that can be used with the adapter in use used for querying a datetime in a certain format

string
datetimeIntervalClause(string $date, string $interval)

function to return an SQL datetime expression that can be used with the adapter in use used for querying a datetime addition

string
datetimeDifferenceClause(string $date1, string $date2)

function to return an SQL datetime expression that can be used with the adapter in use used for querying a datetime substraction

string
concatOperator()

String operator for concatenation of strings

from  Database
bool
supportsCollations()

Returns true if this database supports collations

bool
supportsTimezoneOverride()

Can the database override timezone as a connection setting, or does it use the system timezone exclusively?

string
getVersion()

Query for the version of the currently connected database

from  Database
string
getDatabaseServer()

Get the database server type (e.g. mysql, postgresql).

int
affectedRows()

Return the number of rows affected by the previous operation.

from  Database
searchEngine(array $classesToSearch, string $keywords, int $start, int $pageLength, string $sortBy = "Relevance DESC", string $extraFilter = "", bool $booleanSearch = false, string $alternativeFileFilter = "", bool $invertedMatch = false)

The core search engine, used by this class and its subclasses to do fun stuff.

bool
supportsTransactions()

Determines if this database supports transactions

bool
supportsSavepoints()

Does this database support savepoints in transactions By default it is assumed that they don't unless they are explicitly enabled.

bool
supportsTransactionMode(string $mode)

Determines if the used database supports given transactionMode as an argument to startTransaction() If transactions are completely unsupported, returns false.

from  Database
withTransaction(callable $callback, callable $errorCallback = null, bool|string $transactionMode = false, bool $errorIfTransactionsUnsupported = false)

Invoke $callback within a transaction

from  Database
supportsExtensions($extensions)

No description

from  Database
transactionStart(string|bool $transactionMode = false, string|bool $sessionCharacteristics = false)

Start a prepared transaction See http://developer.postgresql.org/pgdocs/postgres/sql-set-transaction.html for details on transaction isolation options

transactionSavepoint(string $savepoint)

Create a savepoint that you can jump back to if you encounter problems

bool|null
transactionRollback(string|bool $savepoint = false)

Rollback or revert to a savepoint if your queries encounter problems If you encounter a problem at any point during a transaction, you may need to rollback that particular query, or return to a savepoint

bool|null
transactionEnd(bool $chain = false)

Commit everything inside this transaction so far

int
transactionDepth()

Return depth of current transaction

bool
supportsLocks()

Determines if the used database supports application-level locks, which is different from table- or row-level locking.

bool
canLock(string $name)

Returns if the lock is available.

bool
getLock(string $name, int $timeout = 5)

Sets an application-level lock so that no two processes can run at the same time, also called a "cooperative advisory lock".

bool
releaseLock(string $name)

Remove an application-level lock file to allow another process to run (if the execution aborts (e.g. due to an error) all locks are automatically released).

connect(array $parameters)

Instruct the database to generate a live connection

bool
databaseExists(string $name)

Determine if the database with the specified name exists

from  Database
array
databaseList()

Retrieves the list of all databases the user has access to

from  Database
bool
selectDatabase(string $name, bool $create = false, int|bool $errorLevel = E_USER_ERROR)

Change the connection to the specified database, optionally creating the database if it doesn't exist in the current schema.

from  Database
dropSelectedDatabase()

Drop the database that this object is currently connected to.

from  Database
string|null
getSelectedDatabase()

Returns the name of the currently selected database

from  Database
string
now()

Return SQL expression used to represent the current date/time

string
random()

Returns the database-specific version of the random() function

static Config_ForClass
config()

Get a configuration accessor for this class. Short hand for Config::inst()->get($this->class, .....).

mixed
stat(string $name) deprecated

Get inherited config value

mixed
uninherited(string $name)

Gets the uninherited value for the given config option

$this
set_stat(string $name, mixed $value) deprecated

Update the config value for a given property

setSQLMode(string $mode)

Sets the SQL mode

selectTimezone(string $timezone)

Sets the system timezone for the database connection

Details

DBConnector getConnector()

Get the current connector

Return Value

DBConnector

setConnector(DBConnector $connector)

Injector injection point for connector dependency

Parameters

DBConnector $connector

DBSchemaManager getSchemaManager()

Returns the current schema manager

Return Value

DBSchemaManager

setSchemaManager(DBSchemaManager $schemaManager)

Injector injection point for schema manager

Parameters

DBSchemaManager $schemaManager

DBQueryBuilder getQueryBuilder()

Returns the current query builder

Return Value

DBQueryBuilder

setQueryBuilder(DBQueryBuilder $queryBuilder)

Injector injection point for schema manager

Parameters

DBQueryBuilder $queryBuilder

Query query(string $sql, int $errorLevel = E_USER_ERROR)

Execute the given SQL query.

Parameters

string $sql

The SQL query to execute

int $errorLevel

The level of error reporting to enable for the query

Return Value

Query

Query preparedQuery(string $sql, array $parameters, int $errorLevel = E_USER_ERROR)

Execute the given SQL parameterised query with the specified arguments

Parameters

string $sql

The SQL query to execute. The ? character will denote parameters.

array $parameters

An ordered list of arguments.

int $errorLevel

The level of error reporting to enable for the query

Return Value

Query

static setWhitelistQueryArray(array $whitelistArray)

Add the sql queries that need to be partially or fully matched

Parameters

array $whitelistArray

static array getWhitelistQueryArray()

Get the sql queries that need to be partially or fully matched

Return Value

array

int getGeneratedID(string $table)

Get the autogenerated ID from the previous INSERT query.

Parameters

string $table

The name of the table to get the generated ID for

Return Value

int

the most recently generated ID for the specified table

bool isActive()

Determines if we are connected to a server AND have a valid database selected.

Return Value

bool

Flag indicating that a valid database is connected

string escapeString(mixed $value)

Returns an escaped string. This string won't be quoted, so would be suitable for appending to other quoted strings.

Parameters

mixed $value

Value to be prepared for database query

Return Value

string

Prepared string

string quoteString(mixed $value)

Wrap a string into DB-specific quotes.

Parameters

mixed $value

Value to be prepared for database query

Return Value

string

Prepared string

string escapeIdentifier(string|array $value, string $separator = '.')

Escapes an identifier (table / database name). Typically the value is simply double quoted. Don't pass in already escaped identifiers in, as this will double escape the value!

Parameters

string|array $value

The identifier to escape or list of split components

string $separator

Splitter for each component

Return Value

string

manipulate(array $manipulation)

Execute a complex manipulation on the database.

A manipulation is an array of insert / or update sequences. The keys of the array are table names, and the values are map containing 'command' and 'fields'. Command should be 'insert' or 'update', and fields should be a map of field names to field values, NOT including quotes.

The field values could also be in paramaterised format, such as array('MAX(?,?)' => array(42, 69)), allowing the use of raw SQL values such as array('NOW()' => array()).

Parameters

array $manipulation

See also

SQLWriteExpression::addAssignments for syntax examples

quiet()

Enable supression of database messages.

clearAllData()

Clear all data out of the database

clearTable(string $table)

Clear all data in a given table

Parameters

string $table

Name of table

string nullCheckClause(string $field, bool $isNull)

Generates a WHERE clause for null comparison check

Parameters

string $field

Quoted field name

bool $isNull

Whether to check for NULL or NOT NULL

Return Value

string

Non-parameterised null comparison clause

string comparisonClause(string $field, string $value, bool $exact = false, bool $negate = false, bool $caseSensitive = null, bool $parameterised = false)

Generate a WHERE clause for text matching.

Parameters

string $field

Quoted field name

string $value

Escaped search. Can include percentage wildcards. Ignored if $parameterised is true.

bool $exact

Exact matches or wildcard support.

bool $negate

Negate the clause.

bool $caseSensitive

Enforce case sensitivity if TRUE or FALSE. Fallback to default collation if set to NULL.

bool $parameterised

Insert the ? placeholder rather than the given value. If this is true then $value is ignored.

Return Value

string

SQL

string formattedDatetimeClause(string $date, string $format)

function to return an SQL datetime expression that can be used with the adapter in use used for querying a datetime in a certain format

Parameters

string $date

to be formated, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'

string $format

to be used, supported specifiers: %Y = Year (four digits) %m = Month (01..12) %d = Day (01..31) %H = Hour (00..23) %i = Minutes (00..59) %s = Seconds (00..59) %U = unix timestamp, can only be used on it's own

Return Value

string

SQL datetime expression to query for a formatted datetime

string datetimeIntervalClause(string $date, string $interval)

function to return an SQL datetime expression that can be used with the adapter in use used for querying a datetime addition

Parameters

string $date

can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'

string $interval

to be added, use the format [sign][integer] [qualifier], e.g. -1 Day, +15 minutes, +1 YEAR supported qualifiers:

  • years
  • months
  • days
  • hours
  • minutes
  • seconds This includes the singular forms as well

Return Value

string

SQL datetime expression to query for a datetime (YYYY-MM-DD hh:mm:ss) which is the result of the addition

string datetimeDifferenceClause(string $date1, string $date2)

function to return an SQL datetime expression that can be used with the adapter in use used for querying a datetime substraction

Parameters

string $date1

can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name e.g. '"SiteTree"."Created"'

string $date2

to be substracted of $date1, can be either 'now', literal datetime like '1973-10-14 10:30:00' or field name, e.g. '"SiteTree"."Created"'

Return Value

string

SQL datetime expression to query for the interval between $date1 and $date2 in seconds which is the result of the substraction

string concatOperator()

String operator for concatenation of strings

Return Value

string

bool supportsCollations()

Returns true if this database supports collations

Return Value

bool

bool supportsTimezoneOverride()

Can the database override timezone as a connection setting, or does it use the system timezone exclusively?

Return Value

bool

string getVersion()

Query for the version of the currently connected database

Return Value

string

Version of this database

string getDatabaseServer()

Get the database server type (e.g. mysql, postgresql).

This value is passed to the connector as the 'driver' argument when initiating a database connection

Return Value

string

int affectedRows()

Return the number of rows affected by the previous operation.

Return Value

int

PaginatedList searchEngine(array $classesToSearch, string $keywords, int $start, int $pageLength, string $sortBy = "Relevance DESC", string $extraFilter = "", bool $booleanSearch = false, string $alternativeFileFilter = "", bool $invertedMatch = false)

The core search engine, used by this class and its subclasses to do fun stuff.

Searches both SiteTree and File.

Caution: While the $keywords argument is escaped for safe use in a query context, you need to ensure that it is also a valid boolean expression when opting into $booleanSearch. For example, the "asterisk" and "greater than" characters have a special meaning in this context, and can only be placed in certain parts of the keywords. You will need to preprocess and sanitise user input accordingly in order to avoid query errors.

Parameters

array $classesToSearch

List of classes to search

string $keywords

Keywords as a string.

int $start

Item to start returning results from

int $pageLength

Number of items per page

string $sortBy

Sort order expression

string $extraFilter

Additional filter

bool $booleanSearch

Flag for boolean search mode

string $alternativeFileFilter
bool $invertedMatch

Return Value

PaginatedList

Search results

Exceptions

Exception

bool supportsTransactions()

Determines if this database supports transactions

Return Value

bool

Flag indicating support for transactions

bool supportsSavepoints()

Does this database support savepoints in transactions By default it is assumed that they don't unless they are explicitly enabled.

Return Value

bool

Flag indicating support for savepoints in transactions

bool supportsTransactionMode(string $mode)

Determines if the used database supports given transactionMode as an argument to startTransaction() If transactions are completely unsupported, returns false.

Parameters

string $mode

Return Value

bool

withTransaction(callable $callback, callable $errorCallback = null, bool|string $transactionMode = false, bool $errorIfTransactionsUnsupported = false)

Invoke $callback within a transaction

Parameters

callable $callback

Callback to run

callable $errorCallback

Optional callback to run after rolling back transaction.

bool|string $transactionMode

Optional transaction mode to use

bool $errorIfTransactionsUnsupported

If true, this method will fail if transactions are unsupported. Otherwise, the $callback will potentially be invoked outside of a transaction.

Exceptions

Exception

supportsExtensions($extensions)

Parameters

$extensions

transactionStart(string|bool $transactionMode = false, string|bool $sessionCharacteristics = false)

Start a prepared transaction See http://developer.postgresql.org/pgdocs/postgres/sql-set-transaction.html for details on transaction isolation options

Parameters

string|bool $transactionMode

Transaction mode, or false to ignore

string|bool $sessionCharacteristics

Session characteristics, or false to ignore

transactionSavepoint(string $savepoint)

Create a savepoint that you can jump back to if you encounter problems

Parameters

string $savepoint

Name of savepoint

bool|null transactionRollback(string|bool $savepoint = false)

Rollback or revert to a savepoint if your queries encounter problems If you encounter a problem at any point during a transaction, you may need to rollback that particular query, or return to a savepoint

Parameters

string|bool $savepoint

Name of savepoint, or leave empty to rollback to last savepoint

Return Value

bool|null

Boolean is returned if success state is known, or null if unknown. Note: For error checking purposes null should not be treated as error.

bool|null transactionEnd(bool $chain = false)

Commit everything inside this transaction so far

Parameters

bool $chain

Return Value

bool|null

Boolean is returned if success state is known, or null if unknown. Note: For error checking purposes null should not be treated as error.

int transactionDepth()

Return depth of current transaction

Return Value

int

Nesting level, or 0 if not in a transaction

bool supportsLocks()

Determines if the used database supports application-level locks, which is different from table- or row-level locking.

See {@link getLock()} for details.

Return Value

bool

Flag indicating that locking is available

bool canLock(string $name)

Returns if the lock is available.

See {@link supportsLocks()} to check if locking is generally supported.

Parameters

string $name

Name of the lock

Return Value

bool

bool getLock(string $name, int $timeout = 5)

Sets an application-level lock so that no two processes can run at the same time, also called a "cooperative advisory lock".

Return FALSE if acquiring the lock fails; otherwise return TRUE, if lock was acquired successfully. Lock is automatically released if connection to the database is broken (either normally or abnormally), making it less prone to deadlocks than session- or file-based locks. Should be accompanied by a {@link releaseLock()} call after the logic requiring the lock has completed. Can be called multiple times, in which case locks "stack" (PostgreSQL, SQL Server), or auto-releases the previous lock (MySQL).

Note that this might trigger the database to wait for the lock to be released, delaying further execution.

Parameters

string $name

Name of lock

int $timeout

Timeout in seconds

Return Value

bool

bool releaseLock(string $name)

Remove an application-level lock file to allow another process to run (if the execution aborts (e.g. due to an error) all locks are automatically released).

Parameters

string $name

Name of the lock

Return Value

bool

Flag indicating whether the lock was successfully released

connect(array $parameters)

Instruct the database to generate a live connection

Parameters

array $parameters

An map of parameters, which should include:

  • server: The server, eg, localhost
  • username: The username to log on with
  • password: The password to log on with
  • database: The database to connect to
  • charset: The character set to use. Defaults to utf8
  • timezone: (optional) The timezone offset. For example: +12:00, "Pacific/Auckland", or "SYSTEM"
  • driver: (optional) Driver name

bool databaseExists(string $name)

Determine if the database with the specified name exists

Parameters

string $name

Name of the database to check for

Return Value

bool

Flag indicating whether this database exists

array databaseList()

Retrieves the list of all databases the user has access to

Return Value

array

List of database names

bool selectDatabase(string $name, bool $create = false, int|bool $errorLevel = E_USER_ERROR)

Change the connection to the specified database, optionally creating the database if it doesn't exist in the current schema.

Parameters

string $name

Name of the database

bool $create

Flag indicating whether the database should be created if it doesn't exist. If $create is false and the database doesn't exist then an error will be raised

int|bool $errorLevel

The level of error reporting to enable for the query, or false if no error should be raised

Return Value

bool

Flag indicating success

dropSelectedDatabase()

Drop the database that this object is currently connected to.

Use with caution.

string|null getSelectedDatabase()

Returns the name of the currently selected database

Return Value

string|null

Name of the selected database, or null if none selected

string now()

Return SQL expression used to represent the current date/time

Return Value

string

Expression for the current date/time

string random()

Returns the database-specific version of the random() function

Return Value

string

Expression for a random value

static Config_ForClass config()

Get a configuration accessor for this class. Short hand for Config::inst()->get($this->class, .....).

Return Value

Config_ForClass

mixed stat(string $name) deprecated

deprecated 5.0 Use ->config()->get() instead

Get inherited config value

Parameters

string $name

Return Value

mixed

mixed uninherited(string $name)

Gets the uninherited value for the given config option

Parameters

string $name

Return Value

mixed

$this set_stat(string $name, mixed $value) deprecated

deprecated 5.0 Use ->config()->set() instead

Update the config value for a given property

Parameters

string $name
mixed $value

Return Value

$this

setSQLMode(string $mode)

Sets the SQL mode

Parameters

string $mode

Connection mode

selectTimezone(string $timezone)

Sets the system timezone for the database connection

Parameters

string $timezone