JET_UNICODEINDEX Structure

Article
08/26/2021

Applies to: Windows | Windows Server

JET_UNICODEINDEX Structure

The JET_UNICODEINDEX structure customizes how Unicode data gets normalized when an index is created over a Unicode column.

typedef struct tagJET_UNICODEINDEX {
  unsigned long lcid;
  unsigned long dwMapFlags;
} JET_UNICODEINDEX;

Members

lcid

The Locale ID to use when normalizing the data. Any locale may be used as long as the appropriate language pack has been installed on the machine. The one exception is that the Language Neutral locale (LCID of zero) is illegal.

dwMapFlags

These flags get passed to LCMapString when Unicode data gets normalized to a key, which enables user-defined flags to override the default.

Windows 2000: The only two legal values for dwFlags are:

( LCMAP_SORTKEY | NORM_IGNORECASE | NORM_IGNOREKANATYPE | NORM_IGNOREWIDTH | NORM_IGNORENONSPACE )

( LCMAP_SORTKEY | NORM_IGNORECASE | NORM_IGNOREKANATYPE | NORM_IGNOREWIDTH )

dwMapFlags has the following restrictions.

Value	Meaning
LCMAP_SORTKEY	Mandatory.
LCMAP_BYTEREV	Optional.
NORM_IGNORECASE	Optional.
NORM_IGNORENONSPACE	Optional.
NORM_IGNORESYMBOLS	Optional.
NORM_IGNOREKANATYPE	Optional.
NORM_IGNOREWIDTH	Optional.
SORT_STRINGSORT	Optional.

Requirements

Requirement	Value
Client	Requires Windows Vista, Windows XP, or Windows 2000 Professional.
Server	Requires Windows Server 2008, Windows Server 2003, or Windows 2000 Server.
Header	Declared in Esent.h.

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JET_UNICODEINDEX Structure