java.util.regex.Pattern p = java.util.regex.Pattern.compile("[\\)\\(\\+\\-\\*\\s]+");
String[] tokens;
try{ tokens = p.split(s); } catch (blah) { }
How can I accomplish the above functionality in select statement in Sybase ASE 15.0.3.
The Java class works but we are trying to avoid shuttling data in and out of DBMS.
select some_function(column1) from table1
I need some suggestion as to how this some_function may be implemented.
REGEXP and SIMILAR TO appear to be useful in the where clause. We want to extract portions of a colum which stores complex expressions.
Thank you
Related
Suppose I have two tables USER_GROUP and USER_GROUP_DATASOURCE. I have a classic relation where one userGroup can have multiple dataSources and one DataSource simply is a String.
Due to some reasons, I have a custom RecordMapper creating a Java UserGroup POJO. (Mainly compatibility with the other code in the codebase, always being explicit on whats happening). This mapper sometimes creates simply POJOs containing data only from the USER_GROUP table, sometimes also the left joined dataSources.
Currently, I am trying to write the Multiset query along with the custom record mapper. My query thus far looks like this:
List<UserGroup> = ctx
.select(
asterisk(),
multiset(select(USER_GROUP_DATASOURCE.DATASOURCE_ID)
.from(USER_GROUP_DATASOURCE)
.where(USER_GROUP.ID.eq(USER_GROUP_DATASOURCE.USER_GROUP_ID))
).as("datasources").convertFrom(r -> r.map(Record1::value1))
)
.from(USER_GROUP)
.where(condition)
.fetch(new UserGroupMapper()))
Now my question is: How to create the UserGroupMapper? I am stuck right here:
public class UserGroupMapper implements RecordMapper<Record, UserGroup> {
#Override
public UserGroup map(Record rec) {
UserGroup grp = new UserGroup(rec.getValue(USER_GROUP.ID),
rec.getValue(USER_GROUP.NAME),
rec.getValue(USER_GROUP.DESCRIPTION)
javaParseTags(USER_GROUP.TAGS)
);
// Convention: if we have an additional field "datasources", we assume it to be a list of dataSources to be filled in
if (rec.indexOf("datasources") >= 0) {
// How to make `rec.getValue` return my List<String>????
List<String> dataSources = ?????
grp.dataSources.addAll(dataSources);
}
}
My guess is to have something like List<String> dataSources = rec.getValue(..) where I pass in a Field<List<String>> but I have no clue how I could create such Field<List<String>> with something like DSL.field().
How to get a type safe reference to your field from your RecordMapper
There are mostly two ways to do this:
Keep a reference to your multiset() field definition somewhere, and reuse that. Keep in mind that every jOOQ query is a dynamic SQL query, so you can use this feature of jOOQ to assign arbitrary query fragments to local variables (or return them from methods), in order to improve code reuse
You can just raw type cast the value, and not care about type safety. It's always an option, evne if not the cleanest one.
How to improve your query
Unless you're re-using that RecordMapper several times for different types of queries, why not do use Java's type inference instead? The main reason why you're not getting type information in your output is because of your asterisk() usage. But what if you did this instead:
List<UserGroup> = ctx
.select(
USER_GROUP, // Instead of asterisk()
multiset(
select(USER_GROUP_DATASOURCE.DATASOURCE_ID)
.from(USER_GROUP_DATASOURCE)
.where(USER_GROUP.ID.eq(USER_GROUP_DATASOURCE.USER_GROUP_ID))
).as("datasources").convertFrom(r -> r.map(Record1::value1))
)
.from(USER_GROUP)
.where(condition)
.fetch(r -> {
UserGroupRecord ug = r.value1();
List<String> list = r.value2(); // Type information available now
// ...
})
There are other ways than the above, which is using jOOQ 3.17+'s support for Table as SelectField. E.g. in jOOQ 3.16+, you can use row(USER_GROUP.fields()).
The important part is that you avoid the asterisk() expression, which removes type safety. You could even convert the USER_GROUP to your UserGroup type using USER_GROUP.convertFrom(r -> ...) when you project it:
List<UserGroup> = ctx
.select(
USER_GROUP.convertFrom(r -> ...),
// ...
I am basically trying to run a query that gives me all the Users that have purchased a product with a particular SKU. Essentially this SQL here:
SELECT u.FirstName, u.LastName, u.Email
FROM COM_OrderItem oi INNER JOIN COM_Order o ON oi.OrderItemOrderID = o.OrderID
INNER JOIN COM_Customer c ON o.OrderCustomerID = c.CustomerID
INNER JOIN CMS_User u ON c.CustomerUserID = u.UserID
WHERE oi.OrderItemSKUID = 1013
I was trying to use the ObjectQuery API to try and achieve this but have no idea how to do this. The documentation here does not cover the specific type of scenario I am looking for. I came up with this just to try and see if it works but I don't get the three columns I am after in the result:
var test = OrderItemInfoProvider
.GetOrderItems()
.Source(orderItems => orderItems.Join<OrderInfo>("OrderItemOrderID", "OrderID"))
.Source(orders => orders.Join<CustomerInfo>("OrderCustomerID", "CustomerID"))
.Source(customers => customers.Join<UserInfo>("CustomerUserID", "UserID"))
.WhereEquals("OrderItemSKUID", 1013).Columns("FirstName", "LastName", "Email").Result;
I know this is definitely wrong and I would like to know the right way to achieve this. Perhaps using ObjectQuery is not the right approach here or maybe I can somehow just use raw SQL. I simply don't know enough about Kentico to understand the best approach here.
Actually, the ObjectQuery you created is correct. I tested it and it is providing the correct results. Are you sure that there are indeed orders in the system, which contain a product with SKUID 1013 (you can check that in the COM_OrderItem database table)?
Also, how are you accessing the results? Iterating through the results should look like this:
foreach (DataRow row in test.Tables[0].Rows)
{
string firstName = ValidationHelper.GetString(row["FirstName"], "");
string lastName = ValidationHelper.GetString(row["LastName"], "");
string email = ValidationHelper.GetString(row["Email"], "");
}
Pardon my newbieness but im trying to build a completely ad-hoc query builder using slick. From our API, I will get a list of strings that is representative of the table, as well as another list that represents the filter for the tables, munge then together to create a query. The hope is that I can take these and create the inner join. A similar example of what i'm trying to do would be JIRA's advanced query builder.
I've been trying to build it using reflection but I've come across so many blocking issues i'm wondering if this is even possible at all.
In code this is what I want to do:
def getTableQueryFor(tbl:String):TableQuery[_] = {
... a matcher that returns a tableQueries?
... i think the return type is incorrect b/c erasure?
}
def getJoinConditionFor:(tbl1:String, tbl2:String) => scala.slick.lifted.Column[Boolean] = (l:Coffees,r:Suppies) => {
...a matcher
}
Is the Following even possible?
val q1 = getTableQueryFor("coffee")
val q2 = getTableQueryFor("supply")
val q3 = q1.innerJoin.q2.on(getJoinCondition("coffee", "supply")
edit: Fixed grammar issue.
I am quite new to the FuelPHP framework. Right now I'm implementing an "autocomplete" for a list of locations.
My code looks like this:
public function action_search($term=null){
$clean_query = Security::clean($term);
$data["locations"] = array();
if ($clean_query != "") {
$data["locations"] = Model_Orm_Location::query()
->where("title", "like", $clean_query."%")
->get();
}
$response = Response::forge(View::forge("location/search", $data));
$response->set_header("Content-Type","application/json");
return $response;
}
As you can see, I'm concatenating a LIKE statement and it sort of feels bad to me. Is this code safe against SQL injections ? If yes, then is it because:
Security::clean will remove all mess;
where() in the ORM query will do the filtering?
Looking at the implementation of Security::clean in the source code of core/class/security.php, in your case the applied filters depend the configuration security.input_filter, which is empty by default. So no filter is applied.
But when you dig deep into the database abstraction, you will see, that when the query is compiled just before execution, the query builder will apply quote on the value that was supplied in the where condition, which will then apply escape on string values. The implementations of that escape method depend on the DBMS connection:
mysql_real_escape_string for mysql,
mysqli::real_escape_string for mysqli, and
PDO::quote for PDO.
This reflects today’s best practices. So, yes, this is safe against SQL injections.
Ok,
Today I am trying to learn Subsonic. Pretty cool stuff.
I am trying to build some search functionality into my website but am struggling about how I might achieve this in Subsonic.
I have one search field that could contain multiple keywords. I want to return results that match all of the keywords. The target on the search is a single text column.
So far I have this (it runs but never returns results):
return new SubSonic.Select().From(Visit.Schema)
.InnerJoin(InfopathArchive.VisitIdColumn, Visit.VisitIdColumn)
.Where(InfopathArchive.XmlDocColumn).Like(keywords)
.ExecuteTypedList<Visit>();
There is a one to one mapping between the Visit table and the InfoPathArchive table. I just want to return the collection of Visits that have the keywords in the related XMLDocColumn.
If I could get that working it would be great. Now the second problem is that if someone searches for 'australia processmodel' then obviously the above code should only return that exact phrase. How can I create a query that splits up my search term so that it must return documents that contain ALL of the individual search terms?
Any help appreciated.
Edit: Ok, so the basic search works, but the multiple keyword search doesnt. I did what Adam suggested but it seems Subsonic only uses one parameter for the query.
Here is the code:
List<string> wordsInQueryList = keywords.Split(' ').ToList();
SqlQuery q = Select.AllColumnsFrom<Visit>()
.InnerJoin(InfopathArchive.VisitIdColumn, Visit.VisitIdColumn)
.Where(Visit.IsDeletedColumn).IsEqualTo(false);
foreach(string wordInQuery in wordsInQueryList)
{
q = q.And(InfopathArchive.XmlDocColumn).Like("%" + wordInQuery + "%");
}
return q.ExecuteTypedList();
Then if I look at the query that Subsonic generates:
SELECT (bunch of columns)
FROM [dbo].[Visit]
INNER JOIN [dbo].[InfopathArchive] ON [dbo].[Visit].[VisitId] = [dbo].[InfopathArchive].[VisitId]
WHERE [dbo].[Visit].[IsDeleted] = #IsDeleted
AND [dbo].[InfopathArchive].[XmlDoc] LIKE #XmlDoc
AND [dbo].[InfopathArchive].[XmlDoc] LIKE #XmlDoc
So it ends up that only the last keyword is being searched for.
Any ideas?
First question:
return new SubSonic.Select().From(Visit.Schema)
.InnerJoin(InfopathArchive.VisitIdColumn, Visit.VisitIdColumn)
.Where(InfopathArchive.XmlDocColumn).Like("%" + keywords + "%")
.ExecuteTypedList<Visit>();
Second question:
Pass a List of words in your query to a function that builds a SubSonic query as follows
SqlQuery query = DB.Select().From(Visit.Schema)
.InnerJoin(InfopathArchive.VisitIdColumn, Visit.VisitIdColumn)
.Where("1=1");
foreach(string wordInQuery in wordsInQueryList)
{
query = query.And(InfopathArchive.XmlDocColumn).Like("%" + wordInQuery + "%")
}
return query.ExecuteTypedList<Visit>();
Obviously this is untested but it should point you in the right direction.
You can do what Adam is suggesting or with 2.2 you can simply use "Contains()" instead of Like("%...%"). We also support StartsWith and EndsWith() :)