I have a stored procedure that will convert some dynamic sql into either a temp table or view dependant on a database setting. This is used to "tune" database functionality between different clients depending on size of data, i.e. temp table takes longer to create but takes longer to setup, a view creates quickly but takes slightly longer to read.
I am looking at expanding this out to include an option for memory optimised tables but can't see how to use a memory optimised table without declaring it fully first.
My code at the moment would be of a format like:
SELECT TOP 10 *
INTO FavoriteCustomers
FROM Customers
ORDER BY Spend DESC
As you can see I'm not declaring the table, just using select into. Is there any way I can SELECT INTO a memory optimised table? I can use:
sys.dm_exec_describe_first_result_set(@mySQLhere)
Which gives me a column definition for the TSQL I pass in. Then use this info to pre-build the table and insert into it, but I'm hoping for a neater method if possible.
Does anyone have any solutions? Search just takes me down the road of how to add data to a MOT not MOT creation as part of a select.
I understand this may not be possible, and I do have the work around described, I just feel I may be missing a better option here.
Currently using multiple servers, MOT functions only being implemented on SQL2016.
Many thanks in advance.
CREATE PROC [engine].[usp_CreateDynamicContent]
@ContentName AS NVARCHAR(MAX)
, @NTS_SessionID NVARCHAR(MAX)
, @SelectSQL NVARCHAR(MAX)
, @PrimaryKeyField NVARCHAR(MAX) = NULL
, @NonClusteredIndexField NVARCHAR(MAX) = NULL
, @debug BIT = 0
AS
BEGIN
DECLARE @ContentType AS NVARCHAR(MAX)
DECLARE @dcName AS NVARCHAR(MAX)
DECLARE @strSQL AS NVARCHAR(MAX)
SET @dcName = 'tmp.dc_' + @ContentName + '_' + @NTS_SessionID
IF OBJECT_ID(@dcName, 'V') IS NOT NULL /* Drop the view if it exists */
BEGIN
SET @strSQL = 'DROP VIEW ' + @dcName
IF @debug = 1
PRINT (@strSQL)
EXEC (@strSQL)
END
IF OBJECT_ID(@dcName) IS NOT NULL /* Drop the table if it exists */
BEGIN
SET @strSQL = 'DROP TABLE ' + @dcName
IF @debug = 1
PRINT (@strSQL)
EXEC (@strSQL)
END
/* This is my database listing types for each table. */
SELECT @ContentType = ContentType
FROM guid.DynamicContents
WHERE ContentName = @ContentName
IF @ContentType = 'VIEW'
BEGIN
SET @strSQL = 'CREATE VIEW ' + @dcName + ' AS' + CHAR(13) + @SelectSQL
IF @debug = 1
PRINT (@strSQL)
EXEC (@strSQL)
END
ELSE
IF @ContentType IN ('TABLE', 'MOT')
BEGIN
SET @strSQL = ''
SELECT @strSQL = @strSQL + ',' + CHAR(10) + '[' + name + '] ' + system_type_name + CASE WHEN @PrimaryKeyField IS NOT NULL
AND @ContentType = 'MOT' THEN ' NOT NULL PRIMARY KEY NONCLUSTERED'
ELSE ''
END + CHAR(13)
FROM sys.dm_exec_describe_first_result_set(@SelectSQL, NULL, 0)
SET @strSQL = STUFF(@strSQL, 1, 1, 'CREATE TABLE ' + @dcName + '(')
IF @PrimaryKeyField IS NOT NULL
AND @ContentType = 'TABLE'
BEGIN
SET @strSQL = @strSQL + CHAR(10) + ',CONSTRAINT pk_' + @ContentName + '_' + @NTS_SessionID + ' PRIMARY KEY (' + @PrimaryKeyField + ')' + CHAR(10)
END
SET @strSQL = @strSQL + ')'
IF @debug = 1
PRINT (@strSQL)
EXEC (@strSQL)
IF @NonClusteredIndexField IS NOT NULL
AND @ContentType = 'TABLE'
BEGIN
SET @strSQL = 'CREATE NONCLUSTERED INDEX ix_' + @ContentName + '_' + @NonClusteredIndexField + ' ON ' + @dcName + ' (' + @NonClusteredIndexField + ')'
IF @debug = 1
PRINT (@strSQL)
EXEC (@strSQL)
END
/* This section added in as I use cte's quite a lot */
IF @SelectSQL LIKE '%/* INSERT HERE */%'
BEGIN
SET @strSQL = REPLACE(@SelectSQL, '/* INSERT HERE */', 'INSERT INTO ' + @dcName)
END
ELSE
BEGIN
SET @strSQL = 'INSERT INTO ' + @dcName + CHAR(13) + @SelectSQL
END
IF @debug = 1
PRINT (@strSQL)
EXEC (@strSQL)
END
END