JetDeleteColumn2 Function

發行項
08/26/2021

Applies to: Windows | Windows Server

JetDeleteColumn2 Function

The JetDeleteColumn2 function deletes a column from an ESE database table and enables a grbit option to be set.

Windows XP: JetDeleteColumn2 is introduced in Windows XP.

    JET_ERR JET_API JetDeleteColumn2(
      __in          JET_SESID sesid,
      __in          JET_TABLEID tableid,
      __in          const tchar* szColumnName,
      __in          const JET_GRBIT grbit
    );

Parameters

sesid

The database session context to use for the API call.

tableid

The table that contains the column to be deleted.

szColumnName

The name of the column to be deleted.

grbit

A group of bits specifying zero or more of the following options.

Value	Meaning
JET_bitDeleteColumnIgnoreTemplateColumns	Setting JET_bitDeleteColumIgnoreTemplateColumns will cause the API to only attempt to delete columns in the derived table. If a column of that name exists in the base table it will be ignored.

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_errColumnInUse	The column is currently in use. It may be currently used by an index.
JET_errFixedDDL	An attempt was made to modify the fixed DDL.
JET_errFixedInheritedDDL	The column named in szColumnName exists in the template table, and the DDL of a template table cannot be modified.
JET_errInvalidName	This may be returned if a bad name for szColumnName was given.
JET_errPermissionDenied	The table is not writable. This may get returned if the database was opened in read-only mode.
JET_errTransReadOnly	The transaction is a read-only transaction.

Remarks

Calling JetDeleteColumn is identical to calling JetDeleteColumn2 with grbit set to zero (0).

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 JetDeleteColumn2W (Unicode) and JetDeleteColumn2A (ANSI).

共用方式為

JetDeleteColumn2 Function