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- 增加 AsTable 多次，可查询分表后的多个子表记录，以 UNION ALL 形式执行；

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This commit is contained in:
28810
2019-09-09 18:30:55 +08:00
parent ebec260d97
commit bcc154ee43
13 changed files with 620 additions and 464 deletions
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144
Providers/FreeSql.Provider.MySql/Curd/MySqlSelect.cs
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@ -12,7 +12,7 @@ namespace FreeSql.MySql.Curd
class MySqlSelect<T1> : FreeSql.Internal.CommonProvider.Select1Provider<T1> where T1 : class
{
internal static string ToSqlStatic(CommonUtils _commonUtils, CommonExpression _commonExpression, string _select, bool _distinct, string field, StringBuilder _join, StringBuilder _where, string _groupby, string _having, string _orderby, int _skip, int _limit, List<SelectTableInfo> _tables, Func<Type, string, string> tableRuleInvoke, List<LambdaExpression> _whereCascadeExpression, IFreeSql _orm)
internal static string ToSqlStatic(CommonUtils _commonUtils, CommonExpression _commonExpression, string _select, bool _distinct, string field, StringBuilder _join, StringBuilder _where, string _groupby, string _having, string _orderby, int _skip, int _limit, List<SelectTableInfo> _tables, Func<Type, string, string[]> tableRuleInvoke, List<LambdaExpression> _whereCascadeExpression, IFreeSql _orm)
{
if (_orm.CodeFirst.IsAutoSyncStructure)
_orm.CodeFirst.SyncStructure(_tables.Select(a => a.Table.Type).ToArray());
@ -22,85 +22,95 @@ namespace FreeSql.MySql.Curd
tb.Cascade = _commonExpression.GetWhereCascadeSql(tb, _whereCascadeExpression);
var sb = new StringBuilder();
var sbnav = new StringBuilder();
sb.Append(_select);
if (_distinct) sb.Append("DISTINCT ");
sb.Append(field).Append(" \r\nFROM ");
var tbsjoin = _tables.Where(a => a.Type != SelectTableInfoType.From).ToArray();
var tbsfrom = _tables.Where(a => a.Type == SelectTableInfoType.From).ToArray();
for (var a = 0; a < tbsfrom.Length; a++)
var tbrules = CommonUtils.GetAllTableRule(_tables, tableRuleInvoke);
var tbrulesGt0 = tbrules.Count > 1;
for (var tbrulesIdx = 0; tbrulesIdx < tbrules.Count; tbrulesIdx++)
{
sb.Append(_commonUtils.QuoteSqlName(tableRuleInvoke(tbsfrom[a].Table.Type, tbsfrom[a].Table.DbName))).Append(" ").Append(tbsfrom[a].Alias);
if (tbsjoin.Length > 0)
if (tbrulesIdx > 0) sb.Append(" \r\n\r\nUNION ALL\r\n\r\n");
if (tbrulesGt0) sb.Append("select * from (");
var tbrule = tbrules[tbrulesIdx];
var sbnav = new StringBuilder();
sb.Append(_select);
if (_distinct) sb.Append("DISTINCT ");
sb.Append(field).Append(" \r\nFROM ");
var tbsjoin = _tables.Where(a => a.Type != SelectTableInfoType.From).ToArray();
var tbsfrom = _tables.Where(a => a.Type == SelectTableInfoType.From).ToArray();
for (var a = 0; a < tbsfrom.Length; a++)
{
//如果存在 join 查询，则处理 from t1, t2 改为 from t1 inner join t2 on 1 = 1
for (var b = 1; b < tbsfrom.Length; b++)
sb.Append(_commonUtils.QuoteSqlName(tbrule[tbsfrom[a].Table.Type])).Append(" ").Append(tbsfrom[a].Alias);
if (tbsjoin.Length > 0)
{
sb.Append(" \r\nLEFT JOIN ").Append(_commonUtils.QuoteSqlName(tableRuleInvoke(tbsfrom[b].Table.Type, tbsfrom[b].Table.DbName))).Append(" ").Append(tbsfrom[b].Alias);
if (string.IsNullOrEmpty(tbsfrom[b].NavigateCondition) && string.IsNullOrEmpty(tbsfrom[b].On) && string.IsNullOrEmpty(tbsfrom[b].Cascade)) sb.Append(" ON 1 = 1");
else
//如果存在 join 查询，则处理 from t1, t2 改为 from t1 inner join t2 on 1 = 1
for (var b = 1; b < tbsfrom.Length; b++)
{
sb.Append(" ON ").Append(tbsfrom[b].NavigateCondition ?? tbsfrom[b].On);
if (string.IsNullOrEmpty(tbsfrom[b].Cascade) == false) sb.Append(" AND (").Append(tbsfrom[b].Cascade).Append(")");
sb.Append(" \r\nLEFT JOIN ").Append(_commonUtils.QuoteSqlName(tbrule[tbsfrom[b].Table.Type])).Append(" ").Append(tbsfrom[b].Alias);
if (string.IsNullOrEmpty(tbsfrom[b].NavigateCondition) && string.IsNullOrEmpty(tbsfrom[b].On) && string.IsNullOrEmpty(tbsfrom[b].Cascade)) sb.Append(" ON 1 = 1");
else
{
sb.Append(" ON ").Append(tbsfrom[b].NavigateCondition ?? tbsfrom[b].On);
if (string.IsNullOrEmpty(tbsfrom[b].Cascade) == false) sb.Append(" AND (").Append(tbsfrom[b].Cascade).Append(")");
}
}
break;
}
break;
else
{
if (!string.IsNullOrEmpty(tbsfrom[a].NavigateCondition)) sbnav.Append(" AND (").Append(tbsfrom[a].NavigateCondition).Append(")");
if (!string.IsNullOrEmpty(tbsfrom[a].On)) sbnav.Append(" AND (").Append(tbsfrom[a].On).Append(")");
if (a > 0 && !string.IsNullOrEmpty(tbsfrom[a].Cascade)) sbnav.Append(" AND (").Append(tbsfrom[a].Cascade).Append(")");
}
if (a < tbsfrom.Length - 1) sb.Append(", ");
}
else
foreach (var tb in tbsjoin)
{
if (!string.IsNullOrEmpty(tbsfrom[a].NavigateCondition)) sbnav.Append(" AND (").Append(tbsfrom[a].NavigateCondition).Append(")");
if (!string.IsNullOrEmpty(tbsfrom[a].On)) sbnav.Append(" AND (").Append(tbsfrom[a].On).Append(")");
if (a > 0 && !string.IsNullOrEmpty(tbsfrom[a].Cascade)) sbnav.Append(" AND (").Append(tbsfrom[a].Cascade).Append(")");
if (tb.Type == SelectTableInfoType.Parent) continue;
switch (tb.Type)
{
case SelectTableInfoType.LeftJoin:
sb.Append(" \r\nLEFT JOIN ");
break;
case SelectTableInfoType.InnerJoin:
sb.Append(" \r\nINNER JOIN ");
break;
case SelectTableInfoType.RightJoin:
sb.Append(" \r\nRIGHT JOIN ");
break;
}
sb.Append(_commonUtils.QuoteSqlName(tbrule[tb.Table.Type])).Append(" ").Append(tb.Alias).Append(" ON ").Append(tb.On ?? tb.NavigateCondition);
if (!string.IsNullOrEmpty(tb.Cascade)) sb.Append(" AND (").Append(tb.Cascade).Append(")");
if (!string.IsNullOrEmpty(tb.On) && !string.IsNullOrEmpty(tb.NavigateCondition)) sbnav.Append(" AND (").Append(tb.NavigateCondition).Append(")");
}
if (a < tbsfrom.Length - 1) sb.Append(", ");
}
foreach (var tb in tbsjoin)
{
if (tb.Type == SelectTableInfoType.Parent) continue;
switch (tb.Type)
if (_join.Length > 0) sb.Append(_join);
sbnav.Append(_where);
if (!string.IsNullOrEmpty(_tables[0].Cascade))
sbnav.Append(" AND (").Append(_tables[0].Cascade).Append(")");
foreach (var tb in _tables)
{
case SelectTableInfoType.LeftJoin:
sb.Append(" \r\nLEFT JOIN ");
break;
case SelectTableInfoType.InnerJoin:
sb.Append(" \r\nINNER JOIN ");
break;
case SelectTableInfoType.RightJoin:
sb.Append(" \r\nRIGHT JOIN ");
break;
if (tb.Type == SelectTableInfoType.Parent) continue;
if (string.IsNullOrEmpty(tb.Table.SelectFilter) == false)
sbnav.Append(" AND (").Append(tb.Table.SelectFilter.Replace("a.", $"{tb.Alias}.")).Append(")");
}
sb.Append(_commonUtils.QuoteSqlName(tableRuleInvoke(tb.Table.Type, tb.Table.DbName))).Append(" ").Append(tb.Alias).Append(" ON ").Append(tb.On ?? tb.NavigateCondition);
if (!string.IsNullOrEmpty(tb.Cascade)) sb.Append(" AND (").Append(tb.Cascade).Append(")");
if (!string.IsNullOrEmpty(tb.On) && !string.IsNullOrEmpty(tb.NavigateCondition)) sbnav.Append(" AND (").Append(tb.NavigateCondition).Append(")");
}
if (_join.Length > 0) sb.Append(_join);
if (sbnav.Length > 0)
{
sb.Append(" \r\nWHERE ").Append(sbnav.Remove(0, 5));
}
if (string.IsNullOrEmpty(_groupby) == false)
{
sb.Append(_groupby);
if (string.IsNullOrEmpty(_having) == false)
sb.Append(" \r\nHAVING ").Append(_having.Substring(5));
}
sb.Append(_orderby);
if (_skip > 0 || _limit > 0)
sb.Append(" \r\nlimit ").Append(Math.Max(0, _skip)).Append(",").Append(_limit > 0 ? _limit : -1);
sbnav.Append(_where);
if (!string.IsNullOrEmpty(_tables[0].Cascade))
sbnav.Append(" AND (").Append(_tables[0].Cascade).Append(")");
foreach (var tb in _tables)
{
if (tb.Type == SelectTableInfoType.Parent) continue;
if (string.IsNullOrEmpty(tb.Table.SelectFilter) == false)
sbnav.Append(" AND (").Append(tb.Table.SelectFilter.Replace("a.", $"{tb.Alias}.")).Append(")");
sbnav.Clear();
if (tbrulesGt0) sb.Append(") ftb");
}
if (sbnav.Length > 0)
{
sb.Append(" \r\nWHERE ").Append(sbnav.Remove(0, 5));
}
if (string.IsNullOrEmpty(_groupby) == false)
{
sb.Append(_groupby);
if (string.IsNullOrEmpty(_having) == false)
sb.Append(" \r\nHAVING ").Append(_having.Substring(5));
}
sb.Append(_orderby);
if (_skip > 0 || _limit > 0)
sb.Append(" \r\nlimit ").Append(Math.Max(0, _skip)).Append(",").Append(_limit > 0 ? _limit : -1);
sbnav.Clear();
return sb.ToString();
}