由于 SQL Server 2019 Linux 中的错误，需要 node-mssql GET 请求中的解决方法两语句查询（DECLARE；SELECT）

Question

Due to a bug in SQL Server 2019 Linux, a node-mssql GET query that should be one single statement:

router.get('/getresult/:srid/:x/:y', function (req, res) {
    sql.connect(config, error => {
        new sql.Request()
            .input('srid', sql.Int, req.params.srid)
            .input('x', sql.Float, req.params.x)
            .input('y', sql.Float, req.params.y)
            .query('SELECT * from dbo.bTest(geometry::Point(@x,@y,@srid))', (error, result) => {
                         res.send(result.recordset);
                    })
            if (error) {
                console.error(`error: ${error.message}`);
            }
    })
});

Now needs to be two statements. The query that crashes SQL Server 2019 Linux is

SELECT * from dbo.bTest(geometry::Point(@x,@y,@srid))

The test table-valued function is this:

create function dbo.bTest ( @p_geom geometry )
Returns @geometries TABLE
(
  id integer,
  geom geometry
)
as
begin
  declare @g geometry;
  set @g = @p_geom.STBuffer(0.5);      
  insert into @geometries values (1, @g);
return;
end;

Until there's a fix, the workaround I've found is to use two statements in the query:

DECLARE @wkt geometry = geometry::Point(@x,@y,@srid);
SELECT * FROM dbo.bTest(@wkt);

As you can see in the following dbfiddle, the two statement query does not crash SQL Server 2019 Linux when it is executed the second time, whereas the single statement query crashes SQL Server 2019 Linux on the second execution:

https://dbfiddle.uk?rdbms=sqlserver_2019l&fiddle=4a7759a742f361fc075f35ae6fbdc186

So, is it possible in the node-mssql GET request to use two statements (DECLARE and SELECT) or will I need to put the query in a stored procedure? And if I put it in a stored procedure, can I use a node-mssql GET request to execute a stored procedure and get values back? I'm getting back a result.recordset that can consist of one or more results.

Answer 1

Should work fine. Clients don't really know if a batch contains multiple statements. In the general case you may need to add SET NOCOUNT ON at the top of the batch to suppress sending row counts to the client for each statement.