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Batch Insert

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This commit is contained in:
sunkaixuan
2017-05-15 15:53:57 +08:00
parent fefa1d6ea1
commit 03e33d5fcd
1 changed files with 42 additions and 2 deletions
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40
SqlSugar/Abstract/DbProvider/SqlBuilderProvider/DMLBuilder/InsertBuilder.cs
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@@ -46,6 +46,26 @@ namespace SqlSugar
}
}
public virtual string SqlTemplateBatch {
get {
return "INSERT {0} ({1})";
}
}
public virtual string SqlTemplateBatchSelect {
get {
return "N'{0}' AS {1}";
}
}
public virtual string SqlTemplateBatchUnion
{
get
{
return "\r\nUNION ALL ";
}
}
public virtual void Clear()
{
@@ -78,9 +98,29 @@ namespace SqlSugar
}
public virtual string ToSqlString()
{
var groupList = DbColumnInfoList.GroupBy(it => it.TableId).ToList();
var isSingle = groupList.Count() == 1;
string columnsString = string.Join(",", this.DbColumnInfoList.Select(it => Builder.GetTranslationColumnName(it.ColumnName)));
if (isSingle)
{
string columnParametersString = string.Join(",", this.DbColumnInfoList.Select(it => Builder.SqlParameterKeyWord + it.ColumnName));
return string.Format(SqlTemplate, GetTableNameString, columnsString, columnParametersString);
}
else {
StringBuilder batchInsetrSql = new StringBuilder();
batchInsetrSql.AppendFormat(GetTableNameString, columnsString);
int i = 0;
foreach (var columns in groupList)
{
var isFirst = i == 0;
if (!isFirst) {
batchInsetrSql.Append(SqlTemplateBatchUnion);
}
batchInsetrSql.Append("\r\n SELECT "+string.Join(",", columns.Select(it => string.Format(SqlTemplateBatchSelect,it.ColumnName,it.Value))));
++i;
}
return batchInsetrSql.ToString();
}
}
}
}