SQL Server: Function Evaluation Time -



SQL Server: Function Evaluation Time -

sql server 2005:

query below returns no info ((0 row(s) affected)), ok.

but when line #3 function phone call enabled, query fails!"conversion failed when converting datetime character string."

coming oracle background - unthinkable! please tell me what's going on - doing wrong ?doesn't ss evaluate function calls in select list @ lastly step (like oracle - or sensible programmer do) ?

select 1 1 --,datepart(yyyy,cast(inception_date27 datetime)) inception_yr [dbo].[h5_premium_detail] dtl, [dbo].[h5_policy_master] polmst polmst.policy_no2 = cast(dtl.arch_master_policy_no41 numeric) , len(inception_date27) != 8

here little clip recorded

thanks

note: know root source of bad info (some rows have "0" instead of "20110704") ss complains here - the gist why failure arise no info found join.

doesn't ss evaluate function calls in select list @ lastly step (like oracle - or sensible programmer do) ?

no. (and - no).

the general rule in sql there's defined "order" in parts of query should appear processed, different database systems free re-order operations, provided end result same.

however, there's still room ambiguity, , sql server seems more systems force conversions before in process might otherwise expected - may that, given io overhead of operations, , expense of performing bring together operation (how big tables? type of bring together has optimizer selected?), performing conversion operation before bring together occurs practically free, that's optimizer has chosen do.

it nice if sql server mark such conversion failures in rows they're processed, , study @ end if result set still contains row conversion failure, that's not how works.

pushing of case look in select clause plenty (similar niktrs answer):

select /* other columns */ case when inception_date27 '[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]' datepart(year,convert(datetime,inception_date27)) end

sql sql-server

Comments

Post a Comment

Popular posts from this blog

iphone - Dismissing a UIAlertView -

iphone - Dismissing a UIAlertView - i set in app purchase app, , when user taps button, purchase started. basically, tap button, , depending on speed on net connection, waiting 10 seconds until new alert view comes asking if purchase product. user tap button multiple times since nil came up, , multiple purchase alert views come up. additionally, maybe seen user app bug. in end, problem. i want alert view come spinning wheel says "loading..." when users taps purchase button. problem is, how dismiss when new alert view comes asking user if want purchase product? if ([uialertview alloc] says: @"whatever apple's alert view says") { //dismiss "loading..." alert view here } i uncertainty work, input appreciated. thanks! you need have access alertview. can this. create alertview instance var in app delegate , when want show loading initialize instance var assign property , when want dismiss phone call [alertviewinstance d...
Read more

c# - Can ProtoBuf-Net deserialize to a flat class? -

c# - Can ProtoBuf-Net deserialize to a flat class? - protobuf-net uses nested protobuf constructs back upwards inheritance. however, can made force properties flat target class has same properties inherited "serialized" version? see test illustration below. needless result of flat namespace null both properties. possible solution: re-create info flat.b first on property property basis. note: not prefered option. using system; namespace hierarchy { using protobuf; [protocontract] public class { [protomember(1)] public string prop1 { get; set; } } [protocontract] public class b : { public b() { } [protomember(1)] public string prop2 { get; set; } public override string tostring() { homecoming "prop1=" + prop1 + ", prop2=" + prop2; } } } namespace flat { using protobuf; [protocontract] p...
Read more

javascript - Change element in each JQuery tab to dynamically generated colors -

javascript - Change element in each JQuery tab to dynamically generated colors - i'm using jquery ui tabs widget , have button add together additional tabs. i'm tying each tab markers on map coordinating randomly generated color using function gen_color() { homecoming '#'+(math.random()*0xffffff<<0).tostring(16); } so each tab has color corresponds number of markers of same color on map. i'm trying add together 15x15 block of color within tab's tab left of it's label. right i'm using tabtemplate alternative , trying alter when new tab added: $tabs = $("#tabs").tabs({ tabtemplate: "<li><span class='ui-icon-color' style='background-color:#000000;'></span><a href='#{href}'>#{label}</a> <span class='ui-icon ui-icon-close'>remove tab</span></li>", selected: 0, add: funct...
Read more