DSInternals/Src/Microsoft.Isam.Esent.Interop/ApiConstants.cs

//-----------------------------------------------------------------------
// <copyright file="ApiConstants.cs" company="Microsoft Corporation">
//     Copyright (c) Microsoft Corporation.
// </copyright>
//-----------------------------------------------------------------------

namespace Microsoft.Isam.Esent.Interop
{
    /// <summary>
    /// Constants for the ESENT API. These don't have to be looked up via
    /// system parameters.
    /// </summary>
    public static partial class SystemParameters
    {
        /// <summary>
        /// The length of the prefix used to name files used by the database
        /// engine.
        /// </summary>
        public const int BaseNameLength = 3;

        /// <summary>
        /// Maximum size of a table/column/index name.
        /// </summary>
        public const int NameMost = 64;

        /// <summary>
        /// Maximum size for columns which are not JET_coltyp.LongBinary
        /// or JET_coltyp.LongText.
        /// </summary>
        public const int ColumnMost = 255;

        /// <summary>
        /// Maximum number of columns allowed in a table.
        /// </summary>
        public const int ColumnsMost = 65248;

        /// <summary>
        /// Maximum number of fixed columns allowed in a table.
        /// </summary>
        public const int ColumnsFixedMost = 127;

        /// <summary>
        /// Maximum number of variable-length columns allowed
        /// in a table.
        /// </summary>
        public const int ColumnsVarMost = 128;

        /// <summary>
        /// Maximum number of tagged columns allowed in a table.
        /// </summary>
        public const int ColumnsTaggedMost = 64993;

        /// <summary>
        /// The number of pages that gives the smallest possible
        /// temporary database.
        /// </summary>
        public const int PageTempDBSmallest = 14;

        /// <summary>
        /// The maximum length of a locale name (LOCALE_NAME_MAX_LENGTH from winnt.h).
        /// </summary>
        public const int LocaleNameMaxLength = 85;
    }
}