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Object

None

TheDatafile class models an NDB Cluster data file, which is used to store Disk Data table and column data.

Only unindexed column data can be stored on disk. Indexes and indexed columns are stored in memory.

The following table lists the public methods of this class and the purpose or use of each method:

TheDatafile class defines no public types.

This method creates a new instance ofDatafile, or a copy of an existing one.

To create a new instance:

Datafile    (      void    )

To create a copy of an existingDatafile instance:

Datafile    (      const Datafile&datafile    )

New instance:None. Copy constructor: a reference to theDatafile instance to be copied.

ADatafile object.

This method did not work as intended, and was removed in NDB 7.5.0 (Bug #47960, Bug #11756088).

Uint32 getFileNo    (      void    ) const

None.

The file number, as an unsigned 32-bit integer.

This method gets the free space available in the data file.

Uint64 getFree    (      void    ) const

None.

The number of bytes free in the data file, as an unsigned 64-bit integer.

This method did not work as intended, and was removed in NDB 7.5.0 (Bug #47960, Bug #11756088).

Uint32 getNode    (      void    ) const

None.

The node ID as an unsigned 32-bit integer.

This method is used to obtain the object ID of the data file.

virtual int getObjectId    (      void    ) const

None.

The datafile's object ID, as an integer.

This method is used to obtain the data file's object status.

virtual Object::Status getObjectStatus    (      void    ) const

None.

The data file'sStatus. SeeObject::Status.

This method retrieves the data file's object version (seeNDB Schema Object Versions).

virtual int getObjectVersion    (      void    ) const

None.

The data file's object version, as an integer.

This method returns the file system path to the data file.

const char* getPath    (      void    ) const

None.

The path to the data file on the data node's file system, a string (character pointer).

This method gets the size of the data file in bytes.

Uint64 getSize    (      void    ) const

None.

The size of the data file, in bytes, as an unsigned 64-bit integer.

This method can be used to obtain the name of the tablespace to which the data file belongs.

You can also access the associated tablespace's ID directly. SeeDatafile::getTablespaceId().

const char* getTablespace    (      void    ) const

None.

The name of the associated tablespace (as a character pointer).

This method gets the ID of the tablespace to which the data file belongs.

You can also access the name of the associated tablespace directly. SeeDatafile::getTablespace().

Uint32 getTablespaceId    (      void    ) const

None.

This method returns the tablespace ID as an unsigned 32-bit integer.

This method did not work as intended, and was removed in NDB 7.5.0 (Bug #47960, Bug #11756088).

void setNode    (      Uint32nodeId    )

ThenodeId of the node on which the data file is to be located (an unsigned 32-bit integer value).

None.

This method sets the path to the data file on the data node's file system.

const char* setPath    (      void    ) const

The path to the file, a string (as a character pointer).

None.

This method sets the size of the data file.

void setSize    (      Uint64size    )

This method takes a single parameter—the desiredsize in bytes for the data file, as an unsigned 64-bit integer.

None.

This method is used to associate the data file with a tablespace.

setTablespace() can be invoked in either of the two ways listed here:

This method takes a single parameter, which can be either one of the following:

None.