public Query Where(string fieldName, string matchTypeStr, object value)
{
var matchType = MatchTypeHelper.Parse(matchTypeStr);
if (matchType == MatchType.Unknown)
{
throw new Exception("Unknown match type: " + matchTypeStr.ToString());
}
var con = new Condition
{
Field = tab.FieldByName(fieldName),
Type = matchType,
Value = value,
};
if (con.Field == null)
{
throw new Exception("Field not found:" + fieldName);
}
conditions.Add(con);
return(this);
}
public void GenFieldIndex(string name, string matchTypeStr, int begin, int end)
{
if (FieldCount == 0)
{
return;
}
if (FieldByIndex(0).KeyCount == 0)
{
throw new Exception("Require table data to gen index");
}
var field = FieldByName(name);
if (fields == null)
{
throw new Exception("Field not found:" + name);
}
var matchType = MatchTypeHelper.Parse(matchTypeStr);
if (matchType == MatchType.Unknown)
{
throw new Exception("Unknown match type: " + matchTypeStr.ToString());
}
// 遍历实际访问的数值
for (int i = begin; i <= end; i++)
{
var indexList = new List <object>();
switch (matchType)
{
case MatchType.NotEqual:
{
for (int j = i; j <= end; j++)
{
if (j == i)
{
continue;
}
var list = field.GetByKey(j, field.FieldType);
indexList.AddRange(list);
}
}
break;
case MatchType.Great:
{
// 大于当前值的所有列表合并
for (int j = i + 1; j <= end; j++)
{
var list = field.GetByKey(j, field.FieldType);
indexList.AddRange(list);
}
}
break;
case MatchType.GreatEqual:
{
// 大于等于当前值的所有列表合并
for (int j = i; j <= end; j++)
{
var list = field.GetByKey(j, field.FieldType);
indexList.AddRange(list);
}
}
break;
case MatchType.Less:
{
for (int j = begin; j < i; j++)
{
var list = field.GetByKey(j, field.FieldType);
indexList.AddRange(list);
}
}
break;
case MatchType.LessEqual:
{
for (int j = begin; j <= i; j++)
{
var list = field.GetByKey(j, field.FieldType);
indexList.AddRange(list);
}
}
break;
}
field.AddIndexData(matchType, i, indexList);
}
}
