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PgSql support datediff

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sunkaixuan
2022-03-22 21:44:04 +08:00
parent 43f7af4a4b
commit 766cbb41bc
3 changed files with 34 additions and 0 deletions
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7
Src/Asp.Net/PgSqlTest/Demo/Demo1_Queryable.cs
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@@ -42,6 +42,13 @@ namespace OrmTest
var getByWhere2 = db.Queryable<Order>().Where(it => it.Id == DateTime.Now.Year).ToList();
var getByFuns = db.Queryable<Order>().Where(it => SqlFunc.IsNullOrEmpty(it.Name)).ToList();
var getByFuns2 = db.Queryable<Order>().GroupBy(it => it.Name).Select(it => SqlFunc.AggregateDistinctCount(it.Price)).ToList();
var btime = Convert.ToDateTime("2021-1-1");
var etime = Convert.ToDateTime("2022-1-12");
var test01 = db.Queryable<Order>().Select(it => SqlFunc.DateDiff(DateType.Year,btime, etime)).ToList();
var test02 = db.Queryable<Order>().Select(it => SqlFunc.DateDiff(DateType.Day, btime, etime)).ToList();
var test03 = db.Queryable<Order>().Select(it => SqlFunc.DateDiff(DateType.Month, btime, etime)).ToList();
var test04 = db.Queryable<Order>().Select(it => SqlFunc.DateDiff(DateType.Second, DateTime.Now, DateTime.Now.AddMinutes(2))).ToList();
Console.WriteLine("#### Examples End ####");
Console.WriteLine("#### Examples End ####");
}

1
Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/SugarParameter.cs
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@@ -136,6 +136,7 @@ namespace SqlSugar
else if (type!=null&&type.IsEnum())
{
this.DbType = System.Data.DbType.Int64;
this.Value = Convert.ToInt64(Value);
}
}

26
Src/Asp.Net/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLExpressionContext.cs
View File

@@ -133,6 +133,32 @@ namespace SqlSugar
}
public class PostgreSQLMethod : DefaultDbMethod, IDbMethods
{
public override string DateDiff(MethodCallExpressionModel model)
{
var parameter = (DateType)(Enum.Parse(typeof(DateType), model.Args[0].MemberValue.ObjToString()));
var begin = model.Args[1].MemberName;
var end = model.Args[2].MemberName;
switch (parameter)
{
case DateType.Year:
return $" ( DATE_PART('Year', {end} ) - DATE_PART('Year', {begin}) )";
case DateType.Month:
return $" ( ( DATE_PART('Year', {end} ) - DATE_PART('Year', {begin}) ) * 12 + (DATE_PART('month', {end}) - DATE_PART('month', {begin})) )";
case DateType.Day:
return $" ( DATE_PART('day', {end} - {begin}) )";
case DateType.Hour:
return $" ( ( DATE_PART('day', {end} - {begin}) ) * 24 + DATE_PART('hour', {end} - {begin} ) )";
case DateType.Minute:
return $" ( ( ( DATE_PART('day', {end} - {begin}) ) * 24 + DATE_PART('hour', {end} - {begin} ) ) * 60 + DATE_PART('minute', {end} - {begin} ) )";
case DateType.Second:
return $" ( ( ( DATE_PART('day', {end} - {begin}) ) * 24 + DATE_PART('hour', {end} - {begin} ) ) * 60 + DATE_PART('minute', {end} - {begin} ) ) * 60 + DATE_PART('minute', {end} - {begin} )";
case DateType.Millisecond:
break;
default:
break;
}
throw new Exception(parameter + " datediff no support");
}
public override string IIF(MethodCallExpressionModel model)
{
var parameter = model.Args[0];