EN
此内容没有您的语言版本,但有英语版本。

JetCreateIndex4W Function

Windows

Last modified: October 25, 2012

Applies to: Windows | Windows Server

The JetCreateIndex4W function creates indexes over data in an Extensible Storage Engine (ESE) database, which can be used to locate specific data quickly.

The JetCreateIndex4W function was introduced in the Windows 8 operating system.

JET_ERR JET_API JetCreateIndex4W(
  __in          JET_SESID sesid,
  __in          JET_TABLEID tableid,
  __in          JET_INDEXCREATE2* pindexcreate,
  __in          unsigned long cIndexCreate
);

Parameters

sesid

The database session context to use for the API call.

tableid

The table on which the index will be created.

pindexcreate

An array of JET_INDEXCREATE2 structures, each of which defines an index to be created.

cIndexCreate

The number of elements in the pindexcreate array.

Return value

This function returns the JET_ERR data type with one of the return codes listed in the following table. 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_errCannotIndex

An attempt was made to index over an escrow-update or SLV column (note that SLV columns are deprecated).

JET_errColumnNotFound

An attempt was made to index over a nonexistent column. An attempt to conditionally index over a nonexistent column can also produce this error.

JET_errDensityInvalid

This error will be returned if the ulDensity member of the JET_INDEXCREATE2 structure is set to a number less than 20 or greater than 100.

JET_errIndexDuplicate

An attempt to define two identical indexes was made.

JET_errIndexHasPrimary

An attempt was made to specify more than one primary index for a table. A table must have exactly one primary index. If no primary index is specified, the database engine will transparently create one.

JET_errIndexInvalidDef

An invalid index definition was specified. The following are some possible reasons for this error:

  • A primary index is conditional (grbit member of JET_INDEXCREATE2 has JET_bitIndexPrimary set, and the cConditionalColumn member of JET_INDEXCREATE2 is greater than zero).

  • Applies to versions of Windows starting with Windows Server 2003. An attempt was made to create a tuple index with tuple limits, but without passing information in the ptuplelimits member in JET_INDEXCREATE2 (that is, grbit has JET_bitIndexTupleLimits set, but the ptuplelimits pointer is null).

  • Passing in an invalid key definition in the szKey member of the JET_INDEXCREATE2 structure. For information about valid definitions, see JET_INDEXCREATE2.

  • Setting the cbVarSegMac member in JET_INDEXCREATE2 to be greater than JET_cbPrimaryKeyMost (for a primary index) or greater than JET_cbSecondaryKeyMost (for a secondary index).

  • Passing an invalid combination for a user-defined Unicode index (one which has the JET_bitIndexUnicode bit set in the grbit member of JET_INDEXCREATE2). Some common causes may be that the pidxunicode field of the JET_INDEXCREATE2 structure is null, or the LCID specified in the pidxunicode structure is invalid.

  • Specifying a multivalued column for a primary index.

  • Trying to index too many conditional columns. The cConditionalColumn member of the JET_INDEXCREATE2 structure must not be greater than JET_ccolKeyMost.

JET_errIndexTuplesInvalidLimits

Applies to versions of Windows starting with Windows XP. A JET_TUPLELIMITS structure was specified, and its limits are not supported. For more information, see the remarks section of the JET_TUPLELIMITS structure.

JET_errIndexTuplesNonUniqueOnly

Applies to versions of Windows starting with Windows XP. A tuple index cannot be unique (grbit must not have both JET_bitIndexTuples and JET_bitIndexUnique set).

JET_errIndexTuplesOneColumnOnly

Applies to versions of Windows starting with Windows XP. A tuple index can only be over a single column (that is, the grbit member of the JET_INDEXCREATE2 structure has JET_bitIndexTuples set, and the szKey member of the JET_INDEXCREATE2 structure specifies more than one column).

JET_errIndexTuplesSecondaryIndexOnly

Applies to versions of Windows starting with Windows XP. A tuple index cannot be a primary index (that is, the grbit member of the JET_INDEXCREATE2 structure must not have both JET_bitIndexPrimary and JET_bitIndexTuples set).

JET_errIndexTuplesTextColumnsOnly

Applies to versions of Windows starting with Windows XP. A tuple index can only be on a text or Unicode column. An attempt to index other columns (for example, binary columns) will result in JET_errIndexTuplesTextColumnsOnly.

JET_errIndexTuplesVarSegMacNotAllowed

Applies to versions of Windows starting with Windows XP. A tuple index does not allow the cbVarSegMac member of the JET_INDEXCREATE2 structure to be set.

JET_errInTransaction

An attempt was made to create an index without version information while in a transaction.

JET_errInvalidgrbit

The index definition is invalid because the grbit member of the JET_INDEXCREATE2 structure contains inconsistent values. The following are some possible reasons:

  • A primary index had an ignore bit specified (JET_bitIndexPrimary was passed with one of JET_bitIndexIgnoreNull, JET_bitIndexIgnoreAnyNull, or JET_bitIndexIgnoreFirstNull).

  • An empty index does not ignore any null fields (that is, grbit member of the JET_INDEXCREATE2 structure has JET_bitIndexEmpty set, but does not have JET_bitIndexIgnoreAnyNull set).

  • Passing in a JET_CONDITIONALCOLUMN structure with an invalid grbit member. See JET_CONDITIONALCOLUMN.

When creating several indexes at once (that is, if the cIndexCreate parameter is greater than one), none of the indexes may contain any of the following bits:

  • JET_bitIndexPrimary

  • JET_bitIndexUnversioned

  • JET_bitIndexEmpty

JET_errInvalidLanguageId

An invalid Locale ID (LCID) was passed in (either through the lcid member in the JET_UNICODEINDEX structure, which the pidxunicode member in the JET_INDEXCREATE2 structure contains a pointer to, or through the lcid member of the JET_INDEXCREATE2 structure).

JET_errInvalidName

An invalid index name was specified. See JET_INDEXCREATE2 for more details.

JET_errInvalidParameter

An invalid parameter was passed into the API. The following are some reasons why this error may be returned:

JET_errUnicodeTranslationFail

An error occurred while trying to normalize a Unicode column. This can be caused by running out of system resources.

JET_errSpaceHintsInvalid

An element of the JET space hints structure was not correct or actionable.

Remarks

The JetCreateIndex4W function iterates through the indexes given in the pindexcreate parameter, and will sometimes abort on the first failure. Any indexes after the first index with an error may not have been attempted, even though the err member of the JET_INDEXCREATE2 structure contains JET_errSuccess.

Requirements

Client

Requires Windows 8.

Server

Requires Windows Server 2012.

Header

Declared in Esent.h.

Library

Use ESENT.lib.

DLL

Requires ESENT.dll.

See also

显示:
© 2014 Microsoft