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JetRenameColumn Function

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Applies to: Windows | Windows Server

JetRenameColumn Function

The JetRenameColumn function can be used to change the name of an existing column on a table.

Windows XP:  JetRenameColumn is introduced in Windows XP.

    JET_ERR JET_API JetRenameColumn(
      __in          JET_SESID sesid,
      __in          JET_TABLEID tableid,
      __in          JET_PCSTR szName,
      __in          JET_PCSTR szNameNew,
      __in          JET_GRBIT grbit
    );

Parameters

sesid

The session to use for this call.

tableid

The cursor to use for this call.

szName

The current name of the column that will be renamed.

szNameNew

The new name for the column that will be renamed.

grbit

This parameter must be 0.

Return Value

This function returns the JET_ERR datatype with one of the following return codes. For more information about the possible ESE errors, see Extensible Storage Engine Errors and Error Handling Parameters.

Return code

Description

JET_errSuccess

The operation completed successfully.

JET_errClientRequestToStopJetService

It is not possible to complete the operation because all activity on the instance associated with the session has ceased as a result of a call to JetStopService.

JET_errColumnNotFound

This specified column does not exist for this table.

JET_errInvalidName

One of the specified object names was invalid. All object names must conform to the same set of rules. These rules are as follows:

  • Object names must be composed of ASCII characters.

  • Object names must be at least one character in length.

  • Object names may not exceed JET_cbNameMost (64) characters in length.

  • Object names may not begin with a space - object names may not contain ASCII control characters (0x00 through 0x1F).

  • Object names may not contain an exclamation point (!), period (.), left bracket ([), or right bracket (]) character.

  • Once validated, only the portion of the string up to the first space (if any) will be used for the object name. This effectively means that object names may not contain a space either.

JET_errInvalidParameter

One of the parameters provided contained an unexpected value or contained a value that did not make sense when combined with the value of another parameter. This can happen for JetRenameColumn when:

  • szName is NULL.

  • szNameNew is NULL.

JET_errInstanceUnavailable

It is not possible to complete the operation because the instance associated with the session has encountered a fatal error that requires that access to all data be revoked to protect the integrity of that data. This error will only be returned by Windows XP and later releases.

JET_errInTransaction

This operation may only be performed when the session is not currently inside a transaction.

JET_errNotInitialized

It is not possible to complete the operation because the instance associated with the session has not been initialized yet.

JET_errRestoreInProgress

It is not possible to complete the operation because a restore operation is in progress on the instance associated with the session.

JET_errSessionSharingViolation

The same session cannot be used for more than one thread at the same time. This error will only be returned by Windows XP and later releases.

JET_errTermInProgress

It is not possible to complete the operation because the instance associated with the session is being shut down.

JET_errTransReadOnly

An update cannot be done while inside the scope of a read-only transaction. A read-only transaction is a transaction that has been started using a call to JetBeginTransaction2 with JET_bitTransactionReadOnly. This error will only be returned by Windows XP and later releases.

On success, the name of the specified column in the table associated with the cursor is permanently changed to the new name. Any indexes that reference that column will also be updated.

On failure, no change to the database state will occur.

Remarks

The column rename operation is unusual because, unlike other schema operations, it is not carried out as a transaction. When a column in a given table is renamed in one session then any other session using that table will see the change immediately, even if they are in a transaction that would prevent that session from seeing any other change made by the session doing the rename operation.

The column ID of a column is not affected by the rename operation.

Requirements

Requirement Value

Client

Requires Windows Vista or Windows XP.

Server

Requires Windows Server 2008 or Windows Server 2003.

Header

Declared in Esent.h.

Library

Use ESENT.lib.

DLL

Requires ESENT.dll.

Unicode

Implemented as JetRenameColumnW (Unicode) and JetRenameColumnA (ANSI).

See Also

JET_ERR
JET_GRBIT
JET_SESID
JET_TABLEID
JetBeginTransaction2