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- 增加 ISelectGrouping 分组查询总量的方法 .Count()；

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This commit is contained in:
28810
2019-12-21 20:00:39 +08:00
parent 01c0fbf4f2
commit f5128f3308
16 changed files with 51 additions and 3 deletions
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2
FreeSql/Internal/CommonProvider/SelectProvider/Select0Provider.cs
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@ -1052,7 +1052,7 @@ namespace FreeSql.Internal.CommonProvider
_commonExpression.ReadAnonymousField(_tables, field, map, ref index, columns, null, _whereCascadeExpression, true);
this.GroupBy(field.Length > 0 ? field.Remove(0, 2).ToString() : null);
return new SelectGroupingProvider<TKey, TValue>(this, map, _commonExpression, _tables);
return new SelectGroupingProvider<TKey, TValue>(_orm, this, map, _commonExpression, _tables);
}
protected TSelect InternalJoin(Expression exp, SelectTableInfoType joinType)
{

14
FreeSql/Internal/CommonProvider/SelectProvider/SelectGroupingProvider.cs
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@ -11,13 +11,14 @@ namespace FreeSql.Internal.CommonProvider
{
public class SelectGroupingProvider<TKey, TValue> : ISelectGrouping<TKey, TValue>
{
internal IFreeSql _orm;
internal object _select;
internal ReadAnonymousTypeInfo _map;
internal CommonExpression _comonExp;
internal List<SelectTableInfo> _tables;
public SelectGroupingProvider(object select, ReadAnonymousTypeInfo map, CommonExpression comonExp, List<SelectTableInfo> tables)
public SelectGroupingProvider(IFreeSql orm, object select, ReadAnonymousTypeInfo map, CommonExpression comonExp, List<SelectTableInfo> tables)
{
_orm = orm;
_select = select;
_map = map;
_comonExp = comonExp;
@ -162,8 +163,17 @@ namespace FreeSql.Internal.CommonProvider
return this;
}
public long Count() => long.TryParse(string.Concat(_orm.Ado.ExecuteScalar($"select count(1) from ({this.ToSql("1 as1")}) fta")), out var trylng) ? trylng : default(long);
public ISelectGrouping<TKey, TValue> Count(out long count)
{
count = this.Count();
return this;
}
#if net40
#else
async public Task<long> CountAsync() => long.TryParse(string.Concat(await _orm.Ado.ExecuteScalarAsync($"select count(1) from ({this.ToSql("1 as1")}) fta")), out var trylng) ? trylng : default(long);
public Task<List<TReturn>> ToListAsync<TReturn>(Expression<Func<ISelectGroupingAggregate<TKey, TValue>, TReturn>> select)
{
var map = new ReadAnonymousTypeInfo();