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- 增加 IFreeSql.InsertOrUpdate 方法 #316

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28810
2020-05-21 01:59:35 +08:00
parent 4b7a49d88a
commit 6a443620e7
57 changed files with 4627 additions and 209 deletions
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43
Providers/FreeSql.Provider.Dameng/Curd/DamengInsertOrUpdate.cs Normal file
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using FreeSql.Internal;
using System;
using System.Linq;
using System.Text;
namespace FreeSql.Dameng.Curd
{
class DamengInsertOrUpdate<T1> : Internal.CommonProvider.InsertOrUpdateProvider<T1> where T1 : class
{
public DamengInsertOrUpdate(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression)
: base(orm, commonUtils, commonExpression)
{
}
public override string ToSql()
{
if (_source?.Any() != true) return null;
if (_table.Primarys.Any() == false) throw new Exception($"InsertOrUpdate 功能要求实体类 {_table.CsName} 必须有主键");
var sb = new StringBuilder().Append("MERGE INTO ").Append(_commonUtils.QuoteSqlName(TableRuleInvoke())).Append(" t1 \r\n")
.Append("USING (");
WriteSourceSelectUnionAll(sb);
sb.Append(" ) t2 ON (").Append(string.Join(" AND ", _table.Primarys.Select(a => $"t1.{_commonUtils.QuoteSqlName(a.Attribute.Name)} = t2.{a.Attribute.Name}"))).Append(") \r\n");
var cols = _table.Columns.Values.Where(a => a.Attribute.IsPrimary == false && a.Attribute.CanUpdate == true);
if (cols.Any())
sb.Append("WHEN MATCHED THEN \r\n")
.Append(" update set ").Append(string.Join(", ", cols.Select(a =>
a.Attribute.IsVersion ?
$"{_commonUtils.QuoteSqlName(a.Attribute.Name)} = t1.{_commonUtils.QuoteSqlName(a.Attribute.Name)} + 1" :
$"{_commonUtils.QuoteSqlName(a.Attribute.Name)} = t2.{a.Attribute.Name}"
))).Append(" \r\n");
cols = _table.Columns.Values;
sb.Append("WHEN NOT MATCHED THEN \r\n")
.Append(" insert (").Append(string.Join(", ", cols.Select(a => _commonUtils.QuoteSqlName(a.Attribute.Name)))).Append(") \r\n")
.Append(" values (").Append(string.Join(", ", cols.Select(a => $"t2.{a.Attribute.Name}"))).Append(")");
return sb.ToString();
}
}
}