Windows8Api.JetPrereadIndexRanges method

If the records with the specified key ranges are not in the buffer cache, then start asynchronous reads to bring the records into the database buffer cache.

Namespace:  Microsoft.Isam.Esent.Interop.Windows8
Assembly:  Microsoft.Isam.Esent.Interop (in Microsoft.Isam.Esent.Interop.dll)

Syntax

'Declaration
Public Shared Sub JetPrereadIndexRanges ( _
    sesid As JET_SESID, _
    tableid As JET_TABLEID, _
    indexRanges As JET_INDEX_RANGE(), _
    rangeIndex As Integer, _
    rangeCount As Integer, _
    <OutAttribute> ByRef rangesPreread As Integer, _
    columnsPreread As JET_COLUMNID(), _
    grbit As PrereadIndexRangesGrbit _
)
'Usage
Dim sesid As JET_SESID
Dim tableid As JET_TABLEID
Dim indexRanges As JET_INDEX_RANGE()
Dim rangeIndex As Integer
Dim rangeCount As Integer
Dim rangesPreread As Integer
Dim columnsPreread As JET_COLUMNID()
Dim grbit As PrereadIndexRangesGrbitWindows8Api.JetPrereadIndexRanges(sesid, _
    tableid, indexRanges, rangeIndex, _
    rangeCount, rangesPreread, columnsPreread, _
    grbit)

public static void JetPrereadIndexRanges(
    JET_SESID sesid,
    JET_TABLEID tableid,
    JET_INDEX_RANGE[] indexRanges,
    int rangeIndex,
    int rangeCount,
    out int rangesPreread,
    JET_COLUMNID[] columnsPreread,
    PrereadIndexRangesGrbit grbit
)

Parameters

• sesid
  Type: Microsoft.Isam.Esent.Interop.JET_SESID

  The session to use.

• tableid
  Type: Microsoft.Isam.Esent.Interop.JET_TABLEID

  The table to issue the prereads against.

• indexRanges
  Type: []

  The key ranges to preread.

• rangeIndex
  Type: System.Int32

  The index of the first key range in the array to read.

• rangeCount
  Type: System.Int32

  The maximum number of key ranges to preread.

• rangesPreread
  Type: System.Int32

  Returns the number of keys actually preread.

• columnsPreread
  Type: []

  List of column ids for long value columns to preread.

• grbit
  Type: Microsoft.Isam.Esent.Interop.Windows8.PrereadIndexRangesGrbit

  Preread options. Used to specify the direction of the preread.

See also

Reference

Windows8Api class

Windows8Api members

Microsoft.Isam.Esent.Interop.Windows8 namespace