sql-server - 编译为 t-sql 的语言

Question

我在工作中编写了大量的 t-sql，并且经常希望有某种类型的扩展可用(例如，TypeScript 用于 Javascript - 你可以创建类和所有这些面向对象的东西，它只是编译标准 Javascript)。

我想要的一个简单示例(语义当然应该得到改进):

-- Input:
def $t sysname
$t = 'Table1'
select * from $t
-- Output:
select * from Table1

-- Input (issues: remove last comma, newline characters):
def $t sysname
set $t = 'Table1'
;with Units as (select distinct Unit from $t),
[repeat @i; i=1; i<4]S$i as (select Unit, count(*) C from $t where T = $i group by Unit),[endrepeat]
select distinct [repeat (@i; i=1; i<4)]isnull(S$i.C, 0) C$i,[endrepeat]
from Units u
    [repeat @i; i=1; i<4]left join S$i on (u.Unit = S$i.Unit)[endrepeat]
group by [repeat @i; i=1; i<4]S$i.C,[endrepeat]
order by [repeat $i; i=4; i>0]S$i.C desc,[endrepeat]
-- Output:
;with Units as (select distinct Unit from Table1),
S1 as (select Unit, count(*) C from Table1 where T = 1 group by Unit),
S2 as (select Unit, count(*) C from Table1 where T = 2 group by Unit),
S3 as (select Unit, count(*) C from Table1 where T = 3 group by Unit)
select distinct isnull(S1.C, 0) C1, isnull(S2.C, 0) C2, isnull(S3.C, 0) C3
from Units u
    left join S1 on (u.Unit = S1.Unit)
    left join S2 on (u.Unit = S2.Unit)
    left join S3 on (u.Unit = S3.Unit)
group by S1.C, S2.C, S3.C
order by S3.C desc, S2.C desc, S1.C desc

-- Input (sq = singlequotes):
declare @sql varchar(max), @year int
set @year = 2012
set @sql = [sq]
select JobId, InventoryItem
from openquery(MyLinkedServer, '
    select JobId, InventoryItem
    from Jobs
    where year(Created) = {@year}
        and Type <> {TypeA}
') x
[endsq]
exec @sql
-- Output:
declare @sql varchar(max)
declare @year int
set @year = 2012
set @sql = '
    select  JobID, InventoryItem
    from    openquery (MyLinkedServer, ''
            select  JobID, InventoryItem
            from    XXX.Jobs
            where   year(Created) = ' + convert(varchar, @year) + '
                    and Type <> ''''TypeA''''
            order by "Created" desc
    '') x
'
exec @sql

看起来我需要编写自己的 DSL 来实现这一点，但以前从未使用过它，所以任何想法都更受欢迎。 Visual Studio 可视化和建模 SDK (VMSDK) 是否是此类项目的正确选择？它会变得多么复杂？ :)

编辑 - 建议使用 ORM，但这将直接从 SSMS 运行，而不是从 c# 或 java 等语言运行...我的意思是，不会有对象和东西，只有查询。我删除了 c# 标签，因为它具有误导性。这个想法更倾向于 SSMS 插件。

Answer 1

也许 BQL 规范符合要求？ (请参阅规范链接)

There is CoffeeScript, Dart, Typescript, etc for JavaScript. There is LESS and SCSS for CSS.

Why not something for SQL?

So I played the devil's advocate and said: "What if SQL was a compile target?"

In doing so, I found myself wanting a language that:

• Strict superset of SQL. This is important because it promotes a clean transition. One can move migrate their SQL codebase incrementally since all valid SQL is also valid in this language.
• Promotes good and efficient SQL practices
• Promotes keeping SQL code DRY
• Transpiles into easily readable SQL

http://tech.pro/blog/1917/a-better-query-language-bql-language-specification