- 增加 UnionALL 联合查询；#1106 #1104 #668 #478 #432 #213 #138

Author: 2881099

Examples/base_entity/Program.cs

@@ -8,6 +8,7 @@
 using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
+using System.Data.Common;
 using System.Data.Odbc;
 using System.Data.SqlClient;
 using System.Data.SQLite;
@@ -388,6 +389,45 @@ static void Main(string[] args)
             BaseEntity.Initialization(fsql, () => _asyncUow.Value);
             #endregion
 
+            var dbpars = new List<DbParameter>();
+
+            var a1id1 = Guid.NewGuid();
+            var a1id2 = Guid.NewGuid();
+            //fsql.CodeFirst.IsGenerateCommandParameterWithLambda = true;
+            var sql1a0 = fsql.Select<User1>()
+                .WithParameters(dbpars)
+                .Where(a => a.Id == a1id1)
+
+                .UnionAll(
+                    fsql.Select<User1>()
+                        .WithParameters(dbpars)
+                        .Where(a => a.Id == a1id2)
+                )
+                .Where(a => a.Id == a1id1 || a.Id == a1id2)
+                .ToSql();
+            var sql1a1 = fsql.Select<User1>()
+                .Where(a => a.Id == a1id1)
+                .UnionAll(
+                    fsql.Select<User1>()
+                    .Where(a => a.Id == a1id2)
+                )
+                .Where(a => a.Id == a1id1 || a.Id == a1id2)
+                .ToSql();
+            var sql1a2 = fsql.Select<User1, UserGroup>()
+                .InnerJoin((a,b)=> a.GroupId == b.Id)
+                .Where((a, b) => a.Id == a1id1)
+                .WithTempQuery((a, b) => new { user = a, group = b }) //匿名类型
+
+                .UnionAll(
+                    fsql.Select<User1, UserGroup>()
+                        .InnerJoin((a, b) => a.GroupId == b.Id)
+                        .Where((a, b) => a.Id == a1id2)
+                        .WithTempQuery((a, b) => new { user = a, group = b }) //匿名类型
+                )
+
+                .Where(a => a.user.Id == a1id1 || a.user.Id == a1id2)
+                .ToSql();
+
 
             var ddlsql01 = fsql.CodeFirst.GetComparisonDDLStatements<StringNulable>();
 

FreeSql.Tests/FreeSql.Tests/SqlServer/Curd/SqlServerSelectWithTempQueryTest.cs

@@ -434,6 +434,77 @@ public void SingleTablePartitionBy()
             Assert.Equal(list01[2].item.Nickname, "name03");
 
 
+            var sql0111 = fsql.Select<SingleTablePartitionBy_User>()
+                .WithTempQuery(a => new
+                {
+                    item = a,
+                    rownum = SqlExt.RowNumber().Over().PartitionBy(a.Nickname).OrderBy(a.Id).ToValue()
+                })
+                .Where(a => a.rownum == 1)
+                .UnionAll(
+                    fsql.Select<SingleTablePartitionBy_User>()
+                    .WithTempQuery(a => new
+                    {
+                        item = a,
+                        rownum = SqlExt.RowNumber().Over().PartitionBy(a.Nickname).OrderByDescending(a.Id).ToValue()
+                    })
+                    .Where(a => a.rownum == 2)
+                )
+                .Where(a => a.rownum == 1 || a.rownum == 2)
+                .ToSql();
+            var assertSql0111 = @"SELECT * 
+FROM ( SELECT * 
+    FROM ( 
+        SELECT a.[Id], a.[Nickname], row_number() over( partition by a.[Nickname] order by a.[Id]) [rownum] 
+        FROM [SingleTablePartitionBy_User] a ) a 
+    WHERE (a.[rownum] = 1) 
+    UNION ALL 
+    SELECT * 
+    FROM ( 
+        SELECT a.[Id], a.[Nickname], row_number() over( partition by a.[Nickname] order by a.[Id] desc) [rownum] 
+        FROM [SingleTablePartitionBy_User] a ) a 
+    WHERE (a.[rownum] = 2) ) a 
+WHERE ((a.[rownum] = 1 OR a.[rownum] = 2))";
+            Assert.Equal(assertSql0111, sql0111);
+
+            var sel0111 = fsql.Select<SingleTablePartitionBy_User>()
+                .WithTempQuery(a => new
+                {
+                    item = a,
+                    rownum = SqlExt.RowNumber().Over().PartitionBy(a.Nickname).OrderBy(a.Id).ToValue()
+                })
+                .Where(a => a.rownum == 1)
+                .UnionAll(
+                    fsql.Select<SingleTablePartitionBy_User>()
+                    .WithTempQuery(a => new
+                    {
+                        item = a,
+                        rownum = SqlExt.RowNumber().Over().PartitionBy(a.Nickname).OrderByDescending(a.Id).ToValue()
+                    })
+                    .Where(a => a.rownum == 2)
+                )
+                .Where(a => a.rownum == 1 || a.rownum == 2);
+            Assert.Equal(assertSql0111, sel0111.ToSql());
+
+            var list0111 = sel0111.ToList();
+            Assert.Equal(5, list0111.Count);
+            Assert.Equal(list0111[0].rownum, 1);
+            Assert.Equal(list0111[0].item.Id, 1);
+            Assert.Equal(list0111[0].item.Nickname, "name01");
+            Assert.Equal(list0111[1].rownum, 1);
+            Assert.Equal(list0111[1].item.Id, 4);
+            Assert.Equal(list0111[1].item.Nickname, "name02");
+            Assert.Equal(list0111[2].rownum, 1);
+            Assert.Equal(list0111[2].item.Id, 5);
+            Assert.Equal(list0111[2].item.Nickname, "name03");
+            Assert.Equal(list0111[3].rownum, 2);
+            Assert.Equal(list0111[3].item.Id, 2);
+            Assert.Equal(list0111[3].item.Nickname, "name01");
+            Assert.Equal(list0111[4].rownum, 2);
+            Assert.Equal(list0111[4].item.Id, 5);
+            Assert.Equal(list0111[4].item.Nickname, "name03");
+
+
             var sql011 = fsql.Select<SingleTablePartitionBy_User>()
                 .GroupBy(a => a.Nickname)
                 .WithTempQuery(g => new { min = g.Min(g.Value.Id) })

FreeSql.Tests/FreeSql.Tests/UnitTest3.cs

@@ -263,7 +263,7 @@ public void Test03()
 
             var ddlsql = g.sqlite.CodeFirst.GetComparisonDDLStatements(typeof(testInsertNullable), "tb123123");
             Assert.Equal(@"CREATE TABLE IF NOT EXISTS ""main"".""tb123123"" (  
-  ""Id"" INTEGER PRIMARY KEY AUTOINCREMENT, 
+  ""Id"" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, 
   ""str1"" NVARCHAR(255) NOT NULL, 
   ""int1"" INTEGER NOT NULL, 
   ""int2"" INTEGER ,