Databases
StackOverflow2013
Postsdbo
POSql Server Case Statement gives me errors in user-defined function
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POSql Server Case Statement gives me errors in user-defined function
    primarykey
    data
    text
    <p>I want to use a case statement in my user defined functions because I need to match on a number of terms. I could use a table for the matches but then I wouldn't be able to put it inside the Computed Column definition. </p> <p>This works with IF statements:</p> <pre><code>CREATE FUNCTION MaraSizeNumber ( @ms varchar ) RETURNS varchar AS BEGIN IF ms = '16-18' RETURN '1' ELSE IF ms = '18-20' RETURN '2' ELSE IF ms = '20-22' RETURN '3' ELSE IF ms = '22+' RETURN '4' ELSE IF ms = '24+' RETURN '5' ELSE IF ms = '14-16' RETURN '7' ELSE RETURN 'BAD' END </code></pre> <p>But with the original style using a CASE...WHEN THEN BLOCK I get an error message.</p> <pre><code>CREATE FUNCTION MaraSizeCaseExample ( @ms varchar ) RETURNS varchar AS BEGIN CASE ms WHEN '16-18' THEN RETURN '1' WHEN '18-20' THEN RETURN '2' WHEN '20-22' THEN RETURN '3' WHEN '22+' THEN RETURN '4' WHEN '24+' THEN RETURN '5' WHEN '14-16' THEN RETURN '7' ELSE RETURN 'BAD' END END </code></pre> <p>I get an error of Incorrect Syntax near case and incorrect syntax near when for my when parts.</p> <p>I have correctly batched everything up, because my last CREATE FUNCTION block ends with the GO, and according to the documentation on CASE, I have the right syntax.</p> <p>I have a larger scalar function I'm building that will use the other scalar functions to generate the production coding in our system corresponding to other parameters. It would be best to be able to use CASE because the production coding depends on the product and the customer.</p> <p>I also get an extra error in the second example at my Create Function line that says, "Incorrect Syntax: 'Create Function' must be the only statement in the batch", but with everything else identical I don't get that error with the IFs.</p> <p>What am I doing wrong, or are CASES only allowed in Sql queries rather than scalar functions? The error messages are coming from Sql Server Management Studio's squiggle error message system.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USTony Peterson
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POSql Server Case Statement gives me errors in user-defined function
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POSql Server Case Statement gives me errors in user-defined function
      1. USK_B
      1. VTFavorite
    3. VO
      singulars
      1. POSql Server Case Statement gives me errors in user-defined function
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload