Ejemplo n.º 1
0
        public bool Find(IComparable key, CsvFieldCache cursor)
        {
            ExTraceGlobals.CommonTracer.TraceDebug((long)this.GetHashCode(), "CsvClusteredIndex Find");
            long position = cursor.Position;
            long num      = cursor.Length;
            bool flag     = false;

            while (position <= num - (long)cursor.ReadSize)
            {
                long num2 = cursor.Seek((num - position) / 2L + position);
                if (!cursor.MoveNext(false))
                {
                    num = num2;
                }
                else
                {
                    object obj = null;
                    while (obj == null && cursor.MoveNext(false))
                    {
                        if (cursor.FieldCount != cursor.SchemaFieldCount)
                        {
                            flag = true;
                        }
                        obj = cursor.GetField(this.idx);
                    }
                    if (obj == null)
                    {
                        num = num2;
                    }
                    else if (key.CompareTo(obj) > 0)
                    {
                        position = cursor.Position;
                    }
                    else
                    {
                        num = num2;
                    }
                }
            }
            cursor.Seek(position);
            bool flag2 = this.Scan(key, cursor);

            return(flag || flag2);
        }
Ejemplo n.º 2
0
        private bool Scan(IComparable key, CsvFieldCache cursor)
        {
            ExTraceGlobals.CommonTracer.TraceDebug((long)this.GetHashCode(), "CsvClusteredIndex Scan");
            bool result = false;

            while (cursor.MoveNext(false))
            {
                if (cursor.FieldCount != cursor.SchemaFieldCount)
                {
                    result = true;
                }
                object field = cursor.GetField(this.idx);
                if (field != null && key.CompareTo(field) <= 0)
                {
                    break;
                }
            }
            return(result);
        }