sql server 2008 - Stored procedure return SELECT only with rows -

-

i set sql stored procedure return specific row in specific order (from more less important):

-- 1st level -> query more detailed object... select ... -- if result find, sp returning correct row. -- if rowcount = 0 then, sp returning empty row  -- , continues next query (less specific 1st one).  if @@rowcount = 0 begin select .... else...   -- again, if result exists, sp returns correct row,   -- result of 1st query returned without rows...  if @@rowcount = 0  begin  select .... else again...  end end

is there option return select statement returns non empty row? don't want return empty rows... , each time row "sub-level" of 1st query, empty results before correct row.

i thinking create table variable. there better ways?

since looking lack of rows why not use if/else statement in procedure. like:

if exists(/*firstquery*/ select ... something) begin    select ... end else if exists (/*secondquery*/ select .... else... ) begin    select .... else...  end else /*third query*/ begin     select .... else again... end

just remember when checking exists should select 1 column (for example id) if have calculated columns can slow down procedure.


Comments

Post a Comment

Popular posts from this blog

django - How can I change user group without delete record -

-
on website user have 1 group. , user can change group. it's made user.groups.clear() and user.groups.add(new_group) but it's not efficient, because there 2 sql query: delete, insert. how can change group update query? user , group related each other using manytomanyfield . means intersection table exists relating both entities, , if don't specify model map (using through attribute) django creates 1 you. looking @ sources django.contrib.auth.models see that's case. fortunatly, can access intermediary model using through attribute of manager (in case, user.groups.through ). can use regular model. example: >>> alice = user.objects.create_user('alice', 'alice@example.com', 'alicepw') >>> employee = group.objects.create(name='employee') >>> manager = group.objects.create(name='manager') >>> alice.groups.add(employee) >>> alice.groups.all() [<group: employee...
Read more

java - Need to add SOAP security token -

-
i need set custom soap header attribute on jax-ws generated webservice client. case webservice calls must go through proxy server requiring specific token (recieved web request header) present in soap request header. e.g.: 1 carserviceservice service = null; 2 service = new carserviceservice(new url(url), new qname(qname); 3 carserviceendpoint port = service.getcarserviceport(); it seems in line 3 wsdl retrieved , call fails due missing security token. 1 point direction on how done? a detailed example has been mentioned here: creating , deploying jax-ws web service on tomcat 6 this article shows how create , use security token .
Read more

java - EclipseLink JPA Object is not a known entity type -

-
i have strange problem eclipselink , object want persist. have 1 object (keypointlistimpl) stores object keypointimpl in list. persisting keypointimpl objects works great if try persist keypointlistimpl object java.lang.illegalargumentexception says object keypointimpl isn't known entity type. here keypointimpl code: @entity @table(name="keypoints") public class keypointimpl implements keypoint { @id @generatedvalue(strategy = generationtype.identity) private int id; @enumerated(enumtype.string) private detectortype keypointtype; private float x; private float y; private float size; private float angle; private float response; private int octave; private int classid; ... } here keypointlistimpl code: @entity @table(name="keypointlists") public class keypointlistimpl implements keypointlist { @id @generatedvalue(strategy = generationtype.identity) private int id; @onetoone(cascade={ca...
Read more