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Repeatedly creating and dropping temp table of the same name


Repeatedly creating and dropping temp table of the same name

By : raj390
Date : November 19 2020, 03:59 PM
help you fix your problem Just Use Go Statement, Which Ensures that Scope of Current Batch Execution
code :
:setvar TotalScope 10
IF OBJECT_ID('tempdb..#extract') IS NOT NULL

 DROP TABLE #extract;
CREATE TABLE #extract(
    x                   VARCHAR(100),
    NumX_Rank           NUMERIC(18,2),  
    NumG_Rank           NUMERIC(18,2)
    );


//what ever Operation what you want to Perform on `#extract`

 GO


// So here `#extract` is not available then You can Create New One Now
select $(TotalScope)


 IF OBJECT_ID('tempdb..#extract') IS NOT NULL

 DROP TABLE #extract;
CREATE TABLE #extract(
    x                   VARCHAR(100),
    NumX_Rank           NUMERIC(18,2),  
    NumG_Rank           NUMERIC(18,2)
    );


   // Again Do what ever Operation what you want to Perform on `#extract`


 GO

  // So here `#extract` is not available then You can Create New One Now


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Complex Select Query Vs Creating a Temp Table and then inserting values in temp table and then selecting it

Complex Select Query Vs Creating a Temp Table and then inserting values in temp table and then selecting it


By : user2211517
Date : March 29 2020, 07:55 AM
I wish did fix the issue. For ease and speed of development, 2 in my experience.
For performance - it depends on the number of rows and tables you're joining and retrieving back. In memory temporary tables (as it looks like you're suggesting) have an overhead, which is obviously the memory they're using.
Can I recreate a temp table after dropping it?

Can I recreate a temp table after dropping it?


By : Ragnar Rohumäe
Date : March 29 2020, 07:55 AM
like below fixes the issue As my comment reflected, I'm going to suggest that the answer is that you use a different #temp table name for each object that you create. It's kind of like saying to the doctor, "it hurts when I do this." His likely response is going to be, "stop doing that!"
The reason this is a problem is that SQL Server's parser attempts to parse the entire batch in one shot. It can clearly see that you are trying to create the same #temp table multiple times, but ignores the DROP command in between (I can't tell you exactly why that is, as I don't have access to the source code). This is the same reason you can't do this:
code :
IF (1=1)
  CREATE TABLE #foo(i INT);
ELSE
  CREATE TABLE #foo(i VARCHAR(32));
What is the preferred method of creating, using and dropping temp tables in sql server?

What is the preferred method of creating, using and dropping temp tables in sql server?


By : Ali Jamal
Date : March 29 2020, 07:55 AM
I wish did fix the issue. You could test and see if one method outperforms another in your scenario. I've heard about this reuse benefit but I haven't performed any extensive tests myself. (My gut instinct is to explicitly drop any #temp objects I've created.)
In a single stored procedure you should never have to check if the table exists - unless it is also possible that the procedure is being called from another procedure that might have created a table with the same name. This is why it is good practice to name #temp tables meaningfully instead of using #t, #x, #y etc.
Temp table not dropping from DB

Temp table not dropping from DB


By : Anubhav Parida
Date : March 29 2020, 07:55 AM
I hope this helps . Temp tables live in tempdb... but your current code is checking for the object to exist in your Sandbox database.
Change your code to use a 3-part name, including the database, tempdb, where the temporary table lives:
code :
IF OBJECT_ID('tempdb.dbo.#tmp1', 'U') IS NOT NULL
  DROP TABLE dbo.#tmp1
How to avoid dropping static table when dropping temp table

How to avoid dropping static table when dropping temp table


By : Alina Tincas
Date : March 29 2020, 07:55 AM
I hope this helps . Temp tables are implicitly created in the pg_temp schema. You can specify that schema when dropping the table:
code :
drop table if exists pg_temp.foo;
create temp table foo;
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