java - Hibernate: How to set NULL query-parameter value with HQL? -

-

How can I set the hibernate parameter to "blank"? Example: 

  query query = getSession (). CreateQuery ("country", "cadence", "hierarchy", "type", type, hibernate, etc.); CreateQuery ("countryDTO c to c.status =: condition and c.type =: type") .setParameter ("position", position, hibernate).

In my case, the status string can be zero. I have debug it and it comes in hibernation, so this creates a SQL string / query like this .... status = null ... although this does not work in MYSQL, SQL statement should be " the status is zero " (MySQL does not understand the status = empty and considers it to be incorrect so that no record will return to the query, by the MacSQL docs I have read ...)

My question:

  1. Why not < Code> Hibernate is "empty" to translate a null string correctly (and rather, "incorrectly" creates "blank")?

  2. What is the best way to rewrite this query, so that it is nil-safe? With zero, I mean, in this case that the "status" string is zero, should it be "empty"?

Thanks a lot!

  1. I believe the first Hibernate SQL translates its HQL query And then only it tries to force your parameters. Does it mean that this param =? to the ultimate null

  2. will not be able to retype the query. Benchmark API usage: 

      criteria c = session. Creation classification (country). C.add (restriction. Eq ("type", type)); C.add (status == blank restrictions .isNull ("status"): restriction. Eq ("status", position)); List Result = c.list ();

Comments

Post a Comment

Popular posts from this blog

php - multilevel menu with multilevel array -

-
Just ask someone to solve this problem? I want to create a multilevel menu I can not find the right solution generated with multilevel array, it always gets an array_push error My study came from the original idea But still my Can not match the need. This is my MySQL [code] ----- --------------------- --------------- | ID | PARENT_ID | Name | Link | Seq | 1 | 0 | Dashboad | Dashboard / | 1 | 2 | 0 | Menu 1 | Menu 1 / | 2 | 3 | 0 | Menu 2 | Menu 2 / | 3 | 4 | 0 | Menu 3 | Menu 3 / | 4 | 5 | 2 | Joint Add / | 1 | 6 | 3 | Joint Add / | 1 | 7 | 2 | Edit | Edit / | 2 | 8 | 4 | Joint Add / | 1 ------------------------------------------ [/ Code] I want to do something like this in my array array ('dashboard' = & gt; array ('id' = & gt; '' 'Dame' = & gt; 'Dashboard', 'Title' = & gt; 'Dashboard', 'MatchMin' = & gt; Base_URL (). 'Dashboard /', 'Active' => = & Gt; NULL), ...
Read more

c# - TypeConverter in propertygrid only converts from string, not to -

-
When the property grid is reached, only the conversion mechanism (often called) is called "Foo!" Returns the property string in the grid when I click to edit I get an exception Type.oo. Object type can not be changed to type. (Not properly translated,) What is a clue from the convert format, why not? And the error indicates that it is trying to convert to a string, not from. I think that when I want to edit this object, it will have to be converted from foo to string, and when the editing ends. Public class FooTypeConverter: StringConverter {public override object ConvertFrom (ITypeDescriptorContext Reference, CultureInfo Culture, Object Value) {New Foo (string) value); } Convert the public override object (Type the ITE DiskText Contact Reference, CultureInfo Culture, Object Value, Type Type) {Return "Foo!"; } Public override bool CanConvertFrom (ITypeDescriptorContext reference, type source type) {back true; } Public Override Bull CanConvertTo (ITypeDescrip...
Read more

jQuery UI: Datepicker month format -

-
I am trying to change the format of the month that shows in the popup (not in the date that the picker actually I do not have any choice anywhere to do this, do I like to use a sub-string () or something else? What I normally display is Trying to change: Class = "ui-datepicker-title"> January & lt; / span & gt; ... & lt; / div & gt; Div>
Read more