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Class Driver

Represents a database driver containing all specificities for a database engine including its SQL dialect.

Abstract
Namespace: Cake\Database

Constants

  • string
    FEATURE_CTE 
    'cte'

    Common Table Expressions (with clause) support.

  • string
    FEATURE_DISABLE_CONSTRAINT_WITHOUT_TRANSACTION 
    'disable-constraint-without-transaction'

    Disabling constraints without being in transaction support.

  • string
    FEATURE_JSON 
    'json'

    Native JSON data type support.

  • string
    FEATURE_QUOTE 
    'quote'

    PDO::quote() support.

  • string
    FEATURE_SAVEPOINT 
    'savepoint'

    Transaction savepoint support.

  • string
    FEATURE_TRUNCATE_WITH_CONSTRAINTS 
    'truncate-with-constraints'

    Truncate with foreign keys attached support.

  • string
    FEATURE_WINDOW 
    'window'

    Window function support (all or partial clauses).

  • int|null
    MAX_ALIAS_LENGTH 
    null
  • array<int>
    RETRY_ERROR_CODES 
    []

Property Summary

  • $_autoQuoting protected
    bool

    Indicates whether the driver is doing automatic identifier quoting for all queries

  • $_baseConfig protected
    array<string, mixed>

    Base configuration that is merged into the user supplied configuration data.

  • $_config protected
    array<string, mixed>

    Configuration data.

  • $_connection protected
    PDO

    Instance of PDO.

  • $_version protected
    string|null

    The server version

  • $connectRetries protected
    int

    The last number of connection retry attempts.

Method Summary

  • __construct() public

    Constructor

  • __debugInfo() public

    Returns an array that can be used to describe the internal state of this object.

  • __destruct() public

    Destructor

  • _connect() protected

    Establishes a connection to the database server

  • beginTransaction() public

    Starts a transaction.

  • commitTransaction() public

    Commits a transaction.

  • compileQuery() public

    Transforms the passed query to this Driver's dialect and returns an instance of the transformed query and the full compiled SQL string.

  • connect() abstract public

    Establishes a connection to the database server.

  • disableAutoQuoting() public

    Disable auto quoting of identifiers in queries.

  • disableForeignKeySQL() public

    Get the SQL for disabling foreign keys.

  • disconnect() public

    Disconnects from database server.

  • enableAutoQuoting() public

    Sets whether this driver should automatically quote identifiers in queries.

  • enableForeignKeySQL() public

    Get the SQL for enabling foreign keys.

  • enabled() abstract public

    Returns whether php is able to use this driver for connecting to database.

  • getConnectRetries() public

    Returns the number of connection retry attempts made.

  • getConnection() public

    Get the internal PDO connection instance.

  • getMaxAliasLength() public

    Returns the maximum alias length allowed. This can be different from the maximum identifier length for columns.

  • inTransaction() public

    Returns whether a transaction is active for connection.

  • isAutoQuotingEnabled() public

    Returns whether this driver should automatically quote identifiers in queries.

  • isConnected() public

    Checks whether the driver is connected.

  • lastInsertId() public

    Returns last id generated for a table or sequence in database.

  • newCompiler() public

    Returns an instance of a QueryCompiler.

  • newTableSchema() public

    Constructs new TableSchema.

  • prepare() public

    Prepares a sql statement to be executed.

  • queryTranslator() abstract public

    Returns a callable function that will be used to transform a passed Query object. This function, in turn, will return an instance of a Query object that has been transformed to accommodate any specificities of the SQL dialect in use.

  • quote() public

    Returns a value in a safe representation to be used in a query string

  • quoteIdentifier() abstract public

    Quotes a database identifier (a column name, table name, etc..) to be used safely in queries without the risk of using reserved words.

  • releaseSavePointSQL() public

    Get the SQL for releasing a save point.

  • rollbackSavePointSQL() public

    Get the SQL for rollingback a save point.

  • rollbackTransaction() public

    Rollbacks a transaction.

  • savePointSQL() public

    Get the SQL for creating a save point.

  • schema() public

    Returns the schema name that's being used.

  • schemaDialect() abstract public

    Get the schema dialect.

  • schemaValue() public

    Escapes values for use in schema definitions.

  • setConnection() public

    Set the internal PDO connection instance.

  • supports() public

    Returns whether the driver supports the feature.

  • supportsCTEs() public deprecated

    Returns true if the server supports common table expressions.

  • supportsDynamicConstraints() public deprecated

    Returns whether the driver supports adding or dropping constraints to already created tables.

  • supportsQuoting() public deprecated

    Checks if the driver supports quoting, as PDO_ODBC does not support it.

  • supportsSavePoints() public

    Returns whether this driver supports save points for nested transactions.

  • version() public

    Returns connected server version.

Method Detail

__construct() public

__construct(array<string, mixed> $config = [])

Constructor

Parameters

array<string, mixed> $config optional

The configuration for the driver.

Throws

InvalidArgumentException

__debugInfo() public

__debugInfo(): array<string, mixed>

Returns an array that can be used to describe the internal state of this object.

Returns

array<string, mixed>

__destruct() public

__destruct()

Destructor

_connect() protected

_connect(string $dsn, array<string, mixed> $config): bool

Establishes a connection to the database server

Parameters

string $dsn

A Driver-specific PDO-DSN

array<string, mixed> $config

configuration to be used for creating connection

Returns

bool

beginTransaction() public

beginTransaction(): bool

Starts a transaction.

Returns

bool

commitTransaction() public

commitTransaction(): bool

Commits a transaction.

Returns

bool

compileQuery() public

compileQuery(Cake\Database\Query $query, Cake\Database\ValueBinder $binder): array

Transforms the passed query to this Driver's dialect and returns an instance of the transformed query and the full compiled SQL string.

Parameters

Cake\Database\Query $query
Cake\Database\ValueBinder $binder

Returns

array

connect() abstract public

connect(): bool

Establishes a connection to the database server.

Returns

bool

disableAutoQuoting() public

disableAutoQuoting(): $this

Disable auto quoting of identifiers in queries.

Returns

$this

disableForeignKeySQL() public

disableForeignKeySQL(): string

Get the SQL for disabling foreign keys.

Returns

string

disconnect() public

disconnect(): void

Disconnects from database server.

Returns

void

enableAutoQuoting() public

enableAutoQuoting(bool $enable = true): $this

Sets whether this driver should automatically quote identifiers in queries.

Parameters

bool $enable optional

Returns

$this

enableForeignKeySQL() public

enableForeignKeySQL(): string

Get the SQL for enabling foreign keys.

Returns

string

enabled() abstract public

enabled(): bool

Returns whether php is able to use this driver for connecting to database.

Returns

bool

getConnectRetries() public

getConnectRetries(): int

Returns the number of connection retry attempts made.

Returns

int

getConnection() public

getConnection(): PDO

Get the internal PDO connection instance.

Returns

PDO

getMaxAliasLength() public

getMaxAliasLength(): int|null

Returns the maximum alias length allowed. This can be different from the maximum identifier length for columns.

Returns

int|null

inTransaction() public

inTransaction(): bool

Returns whether a transaction is active for connection.

Returns

bool

isAutoQuotingEnabled() public

isAutoQuotingEnabled(): bool

Returns whether this driver should automatically quote identifiers in queries.

Returns

bool

isConnected() public

isConnected(): bool

Checks whether the driver is connected.

Returns

bool

lastInsertId() public

lastInsertId(string|null $table = null, string|null $column = null): string|int

Returns last id generated for a table or sequence in database.

Parameters

string|null $table optional
string|null $column optional

Returns

string|int

newCompiler() public

newCompiler(): Cake\Database\QueryCompiler

Returns an instance of a QueryCompiler.

Returns

Cake\Database\QueryCompiler

newTableSchema() public

newTableSchema(string $table, array $columns = []): Cake\Database\Schema\TableSchema

Constructs new TableSchema.

Parameters

string $table
array $columns optional

Returns

Cake\Database\Schema\TableSchema

prepare() public

prepare(Cake\Database\Query|string $query): Cake\Database\StatementInterface

Prepares a sql statement to be executed.

Parameters

Cake\Database\Query|string $query

Returns

Cake\Database\StatementInterface

queryTranslator() abstract public

queryTranslator(string $type): Closure

Returns a callable function that will be used to transform a passed Query object. This function, in turn, will return an instance of a Query object that has been transformed to accommodate any specificities of the SQL dialect in use.

Parameters

string $type

Returns

Closure

quote() public

quote(mixed $value, int $type = PDO::PARAM_STR): string

Returns a value in a safe representation to be used in a query string

Parameters

mixed $value
int $type optional

Returns

string

quoteIdentifier() abstract public

quoteIdentifier(string $identifier): string

Quotes a database identifier (a column name, table name, etc..) to be used safely in queries without the risk of using reserved words.

Parameters

string $identifier

Returns

string

releaseSavePointSQL() public

releaseSavePointSQL(string|int $name): string

Get the SQL for releasing a save point.

Parameters

string|int $name

Save point name or id

Returns

string

rollbackSavePointSQL() public

rollbackSavePointSQL(string|int $name): string

Get the SQL for rollingback a save point.

Parameters

string|int $name

Save point name or id

Returns

string

rollbackTransaction() public

rollbackTransaction(): bool

Rollbacks a transaction.

Returns

bool

savePointSQL() public

savePointSQL(string|int $name): string

Get the SQL for creating a save point.

Parameters

string|int $name

Save point name or id

Returns

string

schema() public

schema(): string

Returns the schema name that's being used.

Returns

string

schemaDialect() abstract public

schemaDialect(): Cake\Database\Schema\SchemaDialect

Get the schema dialect.

Used by {@link \Cake\Database\Schema} package to reflect schema and generate schema.

If all the tables that use this Driver specify their own schemas, then this may return null.

Returns

Cake\Database\Schema\SchemaDialect

schemaValue() public

schemaValue(mixed $value): string

Escapes values for use in schema definitions.

Parameters

mixed $value

Returns

string

setConnection() public

setConnection(object $connection): $this

Set the internal PDO connection instance.

Parameters

object $connection

PDO instance.

Returns

$this

supports() public

supports(string $feature): bool

Returns whether the driver supports the feature.

Defaults to true for FEATURE_QUOTE and FEATURE_SAVEPOINT.

Parameters

string $feature

Driver feature name

Returns

bool

supportsCTEs() public

supportsCTEs(): bool

Returns true if the server supports common table expressions.

Returns

bool

supportsDynamicConstraints() public

supportsDynamicConstraints(): bool

Returns whether the driver supports adding or dropping constraints to already created tables.

Returns

bool

supportsQuoting() public

supportsQuoting(): bool

Checks if the driver supports quoting, as PDO_ODBC does not support it.

Returns

bool

supportsSavePoints() public

supportsSavePoints(): bool

Returns whether this driver supports save points for nested transactions.

Returns

bool

version() public

version(): string

Returns connected server version.

Returns

string

Property Detail

$_autoQuoting protected

Indicates whether the driver is doing automatic identifier quoting for all queries

Type

bool

$_baseConfig protected

Base configuration that is merged into the user supplied configuration data.

Type

array<string, mixed>

$_config protected

Configuration data.

Type

array<string, mixed>

$_connection protected

Instance of PDO.

Type

PDO

$_version protected

The server version

Type

string|null

$connectRetries protected

The last number of connection retry attempts.

Type

int

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https://api.cakephp.org/4.4/class-Cake.Database.Driver.html