public void Setup()
{
this.native = new NATIVE_INDEXLIST()
{
tableid = (IntPtr)0x1000,
cRecord = 100,
columnidindexname = 0,
columnidgrbitIndex = 1,
columnidcKey = 2,
columnidcEntry = 3,
columnidcPage = 4,
columnidcColumn = 5,
columnidiColumn = 6,
columnidcolumnid = 7,
columnidcoltyp = 8,
columnidCountry = 9,
columnidLangid = 10,
columnidCp = 11,
columnidCollate = 12,
columnidgrbitColumn = 13,
columnidcolumnname = 14,
columnidLCMapFlags = 15,
};
this.converted = new JET_INDEXLIST();
this.converted.SetFromNativeIndexlist(this.native);
}
/// <summary>
/// Create an array of IndexSegment objects from the data in the current JET_INDEXLIST entry.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="indexlist">The indexlist to take the data from.</param>
/// <returns>An array of IndexSegment objects containing the information for the current index.</returns>
private static IndexSegment[] GetIndexSegmentsFromIndexlist(JET_SESID sesid, JET_INDEXLIST indexlist)
{
var numSegments = (int)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcColumn);
Debug.Assert(numSegments > 0, "Index has zero index segments");
var segments = new IndexSegment[numSegments];
for (int i = 0; i < numSegments; ++i)
{
string columnName = Api.RetrieveColumnAsString(
sesid,
indexlist.tableid,
indexlist.columnidcolumnname,
NativeMethods.Encoding,
RetrieveColumnGrbit.None);
columnName = StringCache.TryToIntern(columnName);
var coltyp = (JET_coltyp)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcoltyp);
var grbit =
(IndexKeyGrbit)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidgrbitColumn);
bool isAscending = IndexKeyGrbit.Ascending == grbit;
var cp = (JET_CP)Api.RetrieveColumnAsInt16(sesid, indexlist.tableid, indexlist.columnidCp);
bool isASCII = JET_CP.ASCII == cp;
segments[i] = new IndexSegment(columnName, coltyp, isAscending, isASCII);
if (i < numSegments - 1)
{
Api.JetMove(sesid, indexlist.tableid, JET_Move.Next, MoveGrbit.None);
}
}
return(segments);
}
/// <summary>
/// Create an IndexInfo object from the data in the current JET_INDEXLIST entry.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="indexlist">The indexlist to take the data from.</param>
/// <returns>An IndexInfo object containing the information from that record.</returns>
private static IndexInfo GetIndexInfoFromIndexlist(JET_SESID sesid, JET_INDEXLIST indexlist)
{
string name = Api.RetrieveColumnAsString(
sesid, indexlist.tableid, indexlist.columnidindexname, NativeMethods.Encoding, RetrieveColumnGrbit.None);
name = StringCache.TryToIntern(name);
int lcid = (int)Api.RetrieveColumnAsInt16(sesid, indexlist.tableid, indexlist.columnidLangid);
var cultureInfo = new CultureInfo(lcid);
uint lcmapFlags = (uint)Api.RetrieveColumnAsUInt32(sesid, indexlist.tableid, indexlist.columnidLCMapFlags);
CompareOptions compareOptions = Conversions.CompareOptionsFromLCMapFlags(lcmapFlags);
uint grbit = (uint)Api.RetrieveColumnAsUInt32(sesid, indexlist.tableid, indexlist.columnidgrbitIndex);
int keys = (int)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcKey);
int entries = (int)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcEntry);
int pages = (int)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcPage);
IndexSegment[] segments = GetIndexSegmentsFromIndexlist(sesid, indexlist);
return(new IndexInfo(
name,
cultureInfo,
compareOptions,
segments,
(CreateIndexGrbit)grbit,
keys,
entries,
pages));
}
public static void JetGetTableIndexInfo(
JET_SESID sesid,
JET_TABLEID tableid,
string indexname,
out JET_INDEXLIST indexlist)
{
Api.JetGetTableIndexInfo(sesid, tableid, indexname, out indexlist, JET_IdxInfo.List);
}
public static void JetGetTableIndexInfo(
JET_SESID sesid,
JET_TABLEID tableid,
string indexname,
out JET_INDEXLIST indexlist)
{
Api.JetGetTableIndexInfo(sesid, tableid, indexname, out indexlist, JET_IdxInfo.List);
}
public static void JetGetIndexInfo(
JET_SESID sesid,
JET_DBID dbid,
string tablename,
string ignored,
out JET_INDEXLIST indexlist)
{
Api.JetGetIndexInfo(sesid, dbid, tablename, ignored, out indexlist, JET_IdxInfo.List);
}
public static void JetGetIndexInfo(
JET_SESID sesid,
JET_DBID dbid,
string tablename,
string ignored,
out JET_INDEXLIST indexlist)
{
Api.JetGetIndexInfo(sesid, dbid, tablename, ignored, out indexlist, JET_IdxInfo.List);
}
/// <summary>
/// Create an IndexInfo object from the data in the current JET_INDEXLIST entry.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="indexlist">The indexlist to take the data from.</param>
/// <returns>An IndexInfo object containing the information from that record.</returns>
private IndexInfo GetIndexInfoFromIndexlist(JET_SESID sesid, JET_INDEXLIST indexlist)
{
// If we use the wide API (Vista+), then the temp table will be in UTF-16.
Encoding encodingOfTextColumns = EsentVersion.SupportsVistaFeatures ? Encoding.Unicode : LibraryHelpers.EncodingASCII;
string name = Api.RetrieveColumnAsString(
sesid, indexlist.tableid, indexlist.columnidindexname, encodingOfTextColumns, RetrieveColumnGrbit.None);
name = StringCache.TryToIntern(name);
CultureInfo cultureInfo = null;
if (EsentVersion.SupportsWindows8Features)
{
string localeName;
this.GetIndexInfo(sesid, name, out localeName, Windows8IdxInfo.LocaleName);
cultureInfo = new CultureInfo(localeName);
}
else
{
#if !MANAGEDESENT_ON_CORECLR
// This probably won't work on platforms that don't support LCIDs. Newer environments have dropped
// LCIDs in favour of locale names. But currently JET_INDEXLIST doesn't expose columnidLocale.
int lcid = (int)Api.RetrieveColumnAsInt16(sesid, indexlist.tableid, indexlist.columnidLangid);
cultureInfo = LibraryHelpers.CreateCultureInfoByLcid(lcid);
#endif // !MANAGEDESENT_ON_CORECLR
}
uint lcmapFlags = (uint)Api.RetrieveColumnAsUInt32(sesid, indexlist.tableid, indexlist.columnidLCMapFlags);
CompareOptions compareOptions = Conversions.CompareOptionsFromLCMapFlags(lcmapFlags);
uint grbit = (uint)Api.RetrieveColumnAsUInt32(sesid, indexlist.tableid, indexlist.columnidgrbitIndex);
int keys = (int)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcKey);
int entries = (int)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcEntry);
int pages = (int)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcPage);
IndexSegment[] segments = GetIndexSegmentsFromIndexlist(sesid, indexlist);
return(new IndexInfo(
name,
cultureInfo,
compareOptions,
segments,
(CreateIndexGrbit)grbit,
keys,
entries,
pages));
}
/// <summary>
/// Iterates over the information in the JET_INDEXLIST, returning information about each index.
/// The table in the indexlist is closed when finished.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="indexlist">The indexlist to iterate over.</param>
/// <returns>An iterator over IndexInfo for each index described in the JET_INDEXLIST.</returns>
private static IEnumerable <IndexInfo> EnumerateIndexInfos(JET_SESID sesid, JET_INDEXLIST indexlist)
{
try
{
if (Api.TryMoveFirst(sesid, indexlist.tableid))
{
do
{
yield return(GetIndexInfoFromIndexlist(sesid, indexlist));
}while (Api.TryMoveNext(sesid, indexlist.tableid));
}
}
finally
{
// Close the temporary table used to return the results
JetCloseTable(sesid, indexlist.tableid);
}
}
/// <summary>
/// Create an IndexInfo object from the data in the current JET_INDEXLIST entry.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="indexlist">The indexlist to take the data from.</param>
/// <returns>An IndexInfo object containing the information from that record.</returns>
private static IndexInfo GetIndexInfoFromIndexlist(JET_SESID sesid, JET_INDEXLIST indexlist)
{
string name = RetrieveColumnAsString(
sesid, indexlist.tableid, indexlist.columnidindexname, NativeMethods.Encoding, RetrieveColumnGrbit.None);
var lcid = (int)RetrieveColumnAsInt16(sesid, indexlist.tableid, indexlist.columnidLangid);
var cultureInfo = new CultureInfo(lcid);
var lcmapFlags = (uint)RetrieveColumnAsUInt32(sesid, indexlist.tableid, indexlist.columnidLCMapFlags);
CompareOptions compareOptions = Conversions.CompareOptionsFromLCMapFlags(lcmapFlags);
var grbit = (uint)RetrieveColumnAsUInt32(sesid, indexlist.tableid, indexlist.columnidgrbitIndex);
IndexSegment[] segments = GetIndexSegmentsFromIndexlist(sesid, indexlist);
return(new IndexInfo(
name,
cultureInfo,
compareOptions,
segments,
(CreateIndexGrbit)grbit));
}
/// <summary>
/// Create an array of IndexSegment objects from the data in the current JET_INDEXLIST entry.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="indexlist">The indexlist to take the data from.</param>
/// <returns>An array of IndexSegment objects containing the information for the current index.</returns>
private static IndexSegment[] GetIndexSegmentsFromIndexlist(JET_SESID sesid, JET_INDEXLIST indexlist)
{
var numSegments = (int)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcColumn);
Debug.Assert(numSegments > 0, "Index has zero index segments");
// If we use the wide API (Vista+), then the temp table will be in UTF-16.
Encoding encodingOfTextColumns = EsentVersion.SupportsVistaFeatures ? Encoding.Unicode : LibraryHelpers.EncodingASCII;
var segments = new IndexSegment[numSegments];
for (int i = 0; i < numSegments; ++i)
{
string columnName = Api.RetrieveColumnAsString(
sesid,
indexlist.tableid,
indexlist.columnidcolumnname,
encodingOfTextColumns,
RetrieveColumnGrbit.None);
columnName = StringCache.TryToIntern(columnName);
var coltyp = (JET_coltyp)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcoltyp);
var grbit =
(IndexKeyGrbit)Api.RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidgrbitColumn);
bool isAscending = IndexKeyGrbit.Ascending == grbit;
var cp = (JET_CP)Api.RetrieveColumnAsInt16(sesid, indexlist.tableid, indexlist.columnidCp);
bool isASCII = JET_CP.ASCII == cp;
segments[i] = new IndexSegment(columnName, coltyp, isAscending, isASCII);
if (i < numSegments - 1)
{
Api.JetMove(sesid, indexlist.tableid, JET_Move.Next, MoveGrbit.None);
}
}
return(segments);
}
/// <summary>
/// Creates an <see cref="IndexDefinition"/> object from the specified <paramref name="indexList"/>.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="tableName">Name of the table.</param>
/// <param name="indexList">The index list.</param>
/// <returns>An <see cref="IndexDefinition"/> object represting the specified index.</returns>
internal static IndexDefinition Load(IsamDatabase database, string tableName, JET_INDEXLIST indexList)
{
lock (database.IsamSession)
{
JET_SESID sesid = database.IsamSession.Sesid;
using (IsamTransaction trx = new IsamTransaction(database.IsamSession))
{
// load info for the index
IndexDefinition indexDefinition = new IndexDefinition();
indexDefinition.name = Api.RetrieveColumnAsString(
sesid,
indexList.tableid,
indexList.columnidindexname);
CreateIndexGrbit grbitIndex = (CreateIndexGrbit)Api.RetrieveColumnAsUInt32(sesid, indexList.tableid, indexList.columnidgrbitIndex);
indexDefinition.flags = IndexFlagsFromGrbits(grbitIndex);
Api.JetGetIndexInfo(
sesid,
database.Dbid,
tableName,
indexDefinition.name,
out indexDefinition.density,
JET_IdxInfo.SpaceAlloc);
int lcid;
Api.JetGetIndexInfo(
database.IsamSession.Sesid,
database.Dbid,
tableName,
indexDefinition.name,
out lcid,
JET_IdxInfo.LCID);
indexDefinition.cultureInfo = new CultureInfo(lcid);
indexDefinition.compareOptions =
Conversions.CompareOptionsFromLCMapFlags(
Api.RetrieveColumnAsUInt32(
database.IsamSession.Sesid,
indexList.tableid,
indexList.columnidLCMapFlags).GetValueOrDefault());
// CONSIDER: move this workaround into Isam.Interop
try
{
ushort maxKeyLength;
Api.JetGetIndexInfo(
database.IsamSession.Sesid,
database.Dbid,
tableName,
indexDefinition.name,
out maxKeyLength,
JET_IdxInfo.KeyMost);
indexDefinition.maxKeyLength = maxKeyLength;
}
catch (EsentInvalidParameterException)
{
indexDefinition.maxKeyLength = 255;
}
catch (EsentColumnNotFoundException)
{
indexDefinition.maxKeyLength = 255;
}
// load info for each key column in the index
int currentColumn = 0;
int totalNumberColumns = Api.RetrieveColumnAsInt32(sesid, indexList.tableid, indexList.columnidcColumn).GetValueOrDefault();
indexDefinition.keyColumnCollection = new KeyColumnCollection();
do
{
// load info for this key column
IndexKeyGrbit grbitColumn = (IndexKeyGrbit)Api.RetrieveColumnAsUInt32(sesid, indexList.tableid, indexList.columnidgrbitColumn);
bool isAscending = (grbitColumn & IndexKeyGrbit.Descending) == 0;
string columnName = Api.RetrieveColumnAsString(
sesid,
indexList.tableid,
indexList.columnidcolumnname);
JET_COLUMNBASE columnbase;
Api.JetGetColumnInfo(sesid, database.Dbid, tableName, columnName, out columnbase);
indexDefinition.keyColumnCollection.Add(new KeyColumn(new Columnid(columnbase), isAscending));
// move onto the next key column definition, unless it is
// the last key column
if (currentColumn != totalNumberColumns - 1)
{
Api.TryMoveNext(sesid, indexList.tableid);
}
}
while (++currentColumn < totalNumberColumns);
indexDefinition.keyColumnCollection.ReadOnly = true;
// Vista: There is currently no efficient means to retrieve the
// conditional columns for an index from JET. so, we are
// going to reach into the catalog and fetch them directly.
//
// FUTURE: Windows 7 introduced Windows7IdxInfo.CreateIndex and Windows7IdxInfo.CreateIndex2 (and
// Win8 has Windows8IdxInfo.CreateIndex3). Consider retrieving the conditional columns with that
// API and converting the results. But that does not solve the problem for Vista.
indexDefinition.conditionalColumnCollection = new ConditionalColumnCollection();
JET_TABLEID tableidCatalog;
Api.JetOpenTable(
database.IsamSession.Sesid,
database.Dbid,
"MSysObjects",
null,
0,
OpenTableGrbit.ReadOnly,
out tableidCatalog);
Api.JetSetCurrentIndex(sesid, tableidCatalog, "RootObjects");
Api.MakeKey(sesid, tableidCatalog, true, MakeKeyGrbit.NewKey);
Api.MakeKey(sesid, tableidCatalog, tableName, Encoding.ASCII, MakeKeyGrbit.None);
Api.JetSeek(sesid, tableidCatalog, SeekGrbit.SeekEQ);
JET_COLUMNID columnidTemp = Api.GetTableColumnid(sesid, tableidCatalog, "ObjidTable");
int objidTable = Api.RetrieveColumnAsInt32(sesid, tableidCatalog, columnidTemp).GetValueOrDefault();
Api.JetSetCurrentIndex(sesid, tableidCatalog, "Name");
Api.MakeKey(sesid, tableidCatalog, objidTable, MakeKeyGrbit.NewKey);
Api.MakeKey(sesid, tableidCatalog, (short)3, MakeKeyGrbit.None);
Api.MakeKey(sesid, tableidCatalog, indexDefinition.name, Encoding.ASCII, MakeKeyGrbit.None);
Api.JetSeek(sesid, tableidCatalog, SeekGrbit.SeekEQ);
columnidTemp = Api.GetTableColumnid(sesid, tableidCatalog, "Flags");
int indexFlagsBytes = Api.RetrieveColumnAsInt32(sesid, tableidCatalog, columnidTemp).GetValueOrDefault();
columnidTemp = Api.GetTableColumnid(sesid, tableidCatalog, "ConditionalColumns");
byte[] conditionalColumnsBytes = Api.RetrieveColumn(sesid, tableidCatalog, columnidTemp);
for (int ib = 0; conditionalColumnsBytes != null && ib < conditionalColumnsBytes.Length; ib += 4)
{
uint colid;
bool mustBeNull;
JET_COLUMNBASE columnBase;
// fIDXExtendedColumns
if ((indexFlagsBytes & 0xffff0000) == 0x00010000)
{
// fIDXSEGTemplateColumn
if ((conditionalColumnsBytes[ib + 0] & 0x80) != 0)
{
// fCOLUMNIDTemplate
colid = 0x80000000 | (uint)(conditionalColumnsBytes[ib + 3] << 8) | (uint)conditionalColumnsBytes[ib + 2];
}
else
{
colid = (uint)(conditionalColumnsBytes[ib + 3] << 8) | (uint)conditionalColumnsBytes[ib + 2];
}
// fIDXSEGMustBeNull
if ((conditionalColumnsBytes[ib + 0] & 0x20) != 0)
{
mustBeNull = true;
}
else
{
mustBeNull = false;
}
}
else
{
// do not load conditional columns from an unknown format
continue;
}
JET_COLUMNID castedColid = JET_COLUMNID.CreateColumnidFromNativeValue(unchecked((int)colid));
VistaApi.JetGetColumnInfo(
database.IsamSession.Sesid,
database.Dbid,
tableName,
castedColid,
out columnBase);
indexDefinition.conditionalColumnCollection.Add(new ConditionalColumn(new Columnid(columnBase), mustBeNull));
}
indexDefinition.conditionalColumnCollection.ReadOnly = true;
indexDefinition.ReadOnly = true;
return indexDefinition;
}
}
}
/// <summary>
/// Retrieves information about indexes on a table.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="dbid">The database to use.</param>
/// <param name="tablename">The name of the table to retrieve index information about.</param>
/// <param name="indexname">The name of the index to retrieve information about.</param>
/// <param name="result">Filled in with information about indexes on the table.</param>
/// <param name="infoLevel">The type of information to retrieve.</param>
public static void JetGetIndexInfo(
JET_SESID sesid,
JET_DBID dbid,
string tablename,
string indexname,
out JET_INDEXLIST result,
JET_IdxInfo infoLevel)
{
Api.Check(Impl.JetGetIndexInfo(sesid, dbid, tablename, indexname, out result, infoLevel));
}
/// <summary>
/// Retrieves information about indexes on a table.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="tableid">The table to retrieve index information about.</param>
/// <param name="ignored">This parameter is ignored.</param>
/// <param name="indexlist">Filled in with information about indexes on the table.</param>
public static void JetGetTableIndexInfo(
JET_SESID sesid,
JET_TABLEID tableid,
string ignored,
out JET_INDEXLIST indexlist)
{
Api.Check(Impl.JetGetTableIndexInfo(sesid, tableid, ignored, out indexlist));
}
/// <summary>
/// Retrieves information about indexes on a table.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="tableid">The table to retrieve index information about.</param>
/// <param name="indexname">The name of the index.</param>
/// <param name="result">Filled in with information about indexes on the table.</param>
/// <param name="infoLevel">The type of information to retrieve.</param>
public static void JetGetTableIndexInfo(
JET_SESID sesid,
JET_TABLEID tableid,
string indexname,
out JET_INDEXLIST result,
JET_IdxInfo infoLevel)
{
Api.Check(Impl.JetGetTableIndexInfo(sesid, tableid, indexname, out result, infoLevel));
}
public void JetIndexlistToString()
{
var value = new JET_INDEXLIST { cRecord = 3, tableid = new JET_TABLEID { Value = (IntPtr)0x1a } };
Assert.AreEqual("JET_INDEXLIST(0x1a,3 records)", value.ToString());
}
/// <summary>
/// Create an array of IndexSegment objects from the data in the current JET_INDEXLIST entry.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="indexlist">The indexlist to take the data from.</param>
/// <returns>An array of IndexSegment objects containing the information for the current index.</returns>
private static IndexSegment[] GetIndexSegmentsFromIndexlist(JET_SESID sesid, JET_INDEXLIST indexlist)
{
var numSegments = (int) RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcColumn);
Debug.Assert(numSegments > 0, "Index has zero index segments");
var segments = new IndexSegment[numSegments];
for (int i = 0; i < numSegments; ++i)
{
string columnName = RetrieveColumnAsString(
sesid,
indexlist.tableid,
indexlist.columnidcolumnname,
NativeMethods.Encoding,
RetrieveColumnGrbit.None);
var coltyp = (JET_coltyp) RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidcoltyp);
var grbit =
(IndexKeyGrbit) RetrieveColumnAsInt32(sesid, indexlist.tableid, indexlist.columnidgrbitColumn);
bool isAscending = IndexKeyGrbit.Ascending == grbit;
var cp = (JET_CP) RetrieveColumnAsInt16(sesid, indexlist.tableid, indexlist.columnidCp);
bool isASCII = JET_CP.ASCII == cp;
segments[i] = new IndexSegment(columnName, coltyp, isAscending, isASCII);
if (i < numSegments - 1)
{
Api.JetMove(sesid, indexlist.tableid, JET_Move.Next, MoveGrbit.None);
}
}
return segments;
}
/// <summary>
/// Create an IndexInfo object from the data in the current JET_INDEXLIST entry.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="indexlist">The indexlist to take the data from.</param>
/// <returns>An IndexInfo object containing the information from that record.</returns>
private static IndexInfo GetIndexInfoFromIndexlist(JET_SESID sesid, JET_INDEXLIST indexlist)
{
string name = RetrieveColumnAsString(
sesid, indexlist.tableid, indexlist.columnidindexname, NativeMethods.Encoding, RetrieveColumnGrbit.None);
var lcid = (int) RetrieveColumnAsInt16(sesid, indexlist.tableid, indexlist.columnidLangid);
var cultureInfo = new CultureInfo(lcid);
var lcmapFlags = (uint) RetrieveColumnAsUInt32(sesid, indexlist.tableid, indexlist.columnidLCMapFlags);
CompareOptions compareOptions = Conversions.CompareOptionsFromLCMapFlags(lcmapFlags);
var grbit = (uint) RetrieveColumnAsUInt32(sesid, indexlist.tableid, indexlist.columnidgrbitIndex);
IndexSegment[] segments = GetIndexSegmentsFromIndexlist(sesid, indexlist);
return new IndexInfo(
name,
cultureInfo,
compareOptions,
segments,
(CreateIndexGrbit) grbit);
}
/// <summary>
/// Iterates over the information in the JET_INDEXLIST, returning information about each index.
/// The table in the indexlist is closed when finished.
/// </summary>
/// <param name="sesid">The session to use.</param>
/// <param name="indexlist">The indexlist to iterate over.</param>
/// <returns>An iterator over IndexInfo for each index described in the JET_INDEXLIST.</returns>
private static IEnumerable<IndexInfo> EnumerateIndexInfos(JET_SESID sesid, JET_INDEXLIST indexlist)
{
try
{
MoveBeforeFirst(sesid, indexlist.tableid);
while (TryMoveNext(sesid, indexlist.tableid))
{
yield return GetIndexInfoFromIndexlist(sesid, indexlist);
}
}
finally
{
// Close the temporary table used to return the results
JetCloseTable(sesid, indexlist.tableid);
}
}
