System.Data.SQLite
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Overview
Comment:Support the colUsed field to the sqlite3_index_info structure passed to virtual table xBestIndex methods.
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SHA1: 5e37af01d9aceb5ae202c93af09e805ed2d0606b
User & Date: mistachkin 2015-12-02 05:34:41
Context
2015-12-02
05:40
Be sure to increment the structure offset to account for optional sqlite3_index_info members. check-in: 189db19efc user: mistachkin tags: trunk
05:34
Support the colUsed field to the sqlite3_index_info structure passed to virtual table xBestIndex methods. check-in: 5e37af01d9 user: mistachkin tags: trunk
2015-12-01
19:03
Update the MSVCRT runtimes for VS 2015 in externals to 'Update 1'. check-in: 7866eaefcc user: mistachkin tags: trunk
Changes
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Changes to System.Data.SQLite/SQLiteModule.cs.

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                return true;

            return false;
        }

        ///////////////////////////////////////////////////////////////////////



















        #region Public Properties
        private SQLiteIndexConstraintUsage[] constraintUsages;
        /// <summary>
        /// An array of <see cref="SQLiteIndexConstraintUsage" /> object
        /// instances, each containing information to be supplied to the SQLite
        /// core library.
        /// </summary>
................................................................................
        /// version 3.9.0.
        /// </summary>
        public SQLiteIndexFlags? IdxFlags
        {
            get { return idxFlags; }
            set { idxFlags = value; }
        }
























        #endregion
    }
    #endregion

    ///////////////////////////////////////////////////////////////////////////

    #region SQLiteIndex Helper Class
................................................................................

            if (index.Outputs.CanUseIdxFlags() &&
                index.Outputs.IdxFlags.HasValue)
            {
                SQLiteMarshal.WriteInt32(pIndex, offset,
                   (int)index.Outputs.IdxFlags.GetValueOrDefault());
            }







        }
        #endregion

        ///////////////////////////////////////////////////////////////////////

        #region Public Properties
        private SQLiteIndexInputs inputs;







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                return true;

            return false;
        }

        ///////////////////////////////////////////////////////////////////////

        /// <summary>
        /// Determines if the native flags field can be used, based on the
        /// available version of the SQLite core library.
        /// </summary>
        /// <returns>
        /// Non-zero if the <see cref="ColUsed" /> property is supported by
        /// the SQLite core library.
        /// </returns>
        public bool CanUseColUsed()
        {
            if (UnsafeNativeMethods.sqlite3_libversion_number() >= 3010000)
                return true;

            return false;
        }

        ///////////////////////////////////////////////////////////////////////

        #region Public Properties
        private SQLiteIndexConstraintUsage[] constraintUsages;
        /// <summary>
        /// An array of <see cref="SQLiteIndexConstraintUsage" /> object
        /// instances, each containing information to be supplied to the SQLite
        /// core library.
        /// </summary>
................................................................................
        /// version 3.9.0.
        /// </summary>
        public SQLiteIndexFlags? IdxFlags
        {
            get { return idxFlags; }
            set { idxFlags = value; }
        }

        ///////////////////////////////////////////////////////////////////////

        private long? colUsed;
        /// <summary>
        /// The colUsed field indicates which columns of the virtual table
        /// may be required by the current scan.  Virtual table columns are
        /// numbered from zero in the order in which they appear within the
        /// CREATE TABLE statement passed to sqlite3_declare_vtab().  For the
        /// first 63 columns (columns 0-62), the corresponding bit is set
        /// within the colUsed mask if the column may be required by SQLite.
        /// If the table has at least 64 columns and any column to the right
        /// of the first 63 is required, then bit 63 of colUsed is also set.
        /// In other words, column iCol may be required if the expression
        /// (colUsed & ((sqlite3_uint64)1 << (iCol>=63 ? 63 : iCol)))
        /// evaluates to non-zero.  Using a null value here indicates that a
        /// default flags value should be used.  This property has no effect
        /// if the SQLite core library is not at least version 3.10.0.
        /// </summary>
        public long? ColUsed
        {
            get { return colUsed; }
            set { colUsed = value; }
        }
        #endregion
    }
    #endregion

    ///////////////////////////////////////////////////////////////////////////

    #region SQLiteIndex Helper Class
................................................................................

            if (index.Outputs.CanUseIdxFlags() &&
                index.Outputs.IdxFlags.HasValue)
            {
                SQLiteMarshal.WriteInt32(pIndex, offset,
                   (int)index.Outputs.IdxFlags.GetValueOrDefault());
            }

            if (index.Outputs.CanUseColUsed() &&
                index.Outputs.ColUsed.HasValue)
            {
                SQLiteMarshal.WriteInt64(pIndex, offset,
                    index.Outputs.ColUsed.GetValueOrDefault());
            }
        }
        #endregion

        ///////////////////////////////////////////////////////////////////////

        #region Public Properties
        private SQLiteIndexInputs inputs;