Develop Reference

No response with a query by ID on Azure DocumentDB

I'm currently facing very slow/ no response on a collection looking by ID. I have ~ 2 milion of documents in a partitioned collection. If lookup the document using the partitionKey and id the response is immediate
SELECT * FROM c WHERE c.partitionKey=123 AND c.id="20566-2"
if I try using only the id
SELECT * FROM c WHERE c.id="20566-2"
the response never returns, java client seems freezed and I have the same situation using the Data Explorer from Azure Portal. I tried also looking up by another field that isn't the id or the partitionKey and the response always returns. When I try the select from Java client I always set the flag to enable cross partition query.
The next thing to try is to avoid the character "-" in the ID to test if this character blocks the query (anyway I didn't find anything on the documentation)

The issue is related to your Java code. Due to Azure DocumentDB Java SDK wrapped the DocumentDB REST APIs, according to the reference of REST API Query Documents, as #DanCiborowski-MSFT said, the header x-ms-documentdb-query-enablecrosspartition explains your issue reason as below.
Header: x-ms-documentdb-query-enablecrosspartition
Required/Type: Optional/Boolean
Description: If the collection is partitioned, this must be set to True to allow execution across multiple partitions. Queries that filter against a single partition key, or against single-partitioned collections do not need to set the header.
So you need to set True to enable cross partition for querying across multiple partitions without a partitionKey in where clause via pass a instance of class FeedOption to the method queryDocuments, as below.
FeedOptions queryOptions = new FeedOptions();
queryOptions.setEnableCrossPartitionQuery(true); // Enable query across multiple partitions
String collectionLink = collection.getSelfLink();
FeedResponse<Document> queryResults = documentClient.queryDocuments(
collectionLink,
"SELECT * FROM c WHERE c.id='20566-2'", queryOptions);

Change JSON received units data from Forecast api service

I want change JSON received data from Forecast api to custom units. In API's doc they're wrote i should change query parameters to get this done.
the API call look like this:
https://api.forecast.io/forecast/APIKEY/LATITUDE,LONGITUDE
i wonder how i could send option for changing units. this is what they're wrote:
Options
The API request may optionally be modified through the use of query parameters. It will respond to the following:
units=[setting]: Return the API response in units other than the default Imperial units.
Thanks

As the api states that optional parameters can be added as query parameters to the url , your url should look like
https://api.forecast.io/forecast/APIKEY/LATITUDE,LONGITUDE?units=VALUE
VALUE is the the type of unit you want to select
Some options are
us
si
ca
uk2
auto

QueryBuilder placeholder

I want to reuse a QueryBuilder in my Elasticsearch Java Client and simply substitute in a new Id value each time it is used.
QueryBuilder idQuery = QueryBuilders.boolQuery()
.must(QueryBuilders.matchQuery("id", "<ID PLACEHOLDER>"));
How can I substitute in a new Id each time I run the query? i.e. I will need to programmatically change <ID PLACEHOLDER> each time I run the query.

You need to create new instance of MatchQueryBuilder which is returned by the method call QueryBuilders.matchQuery. Currently there is no method in API to change the value of query text in the same instance of MatchQueryBuilder.
https://searchcode.com/codesearch/view/25254044/
value of search text is initialized only in the constructor. So you will not be able to reuse same instance of MatchQueryBuilder to create a template.

Change a property dynamically from the payload on mule esb

I'm developing a bookstore in mule esb. When I check the quantity from a book order is available with the database, I want to set a property from payload. The payload has several properties from the book (isbn, quantity, prize, avalability), so the last one in this case I want to set to true (is attribute boolean type).
Is there any way to do that with a connector?

not really sure what you're trying to do but...
To change the payload of a message there several ways the easies one being just using a MEL expression.
Say your payload is a map(for you say you toke it from the DB) then you could just do:
<expression-transformer expression="#[payload['avalability']='your value']"
Now you say you wanted that value to be true then the code should look like:
<expression-transformer expression="#[payload['avalability']=true]
MEL will put a boolean true for you there.
Finally to update the DB you should:
<db:update config-ref="Database" bulkMode="true" doc:name="insert contacts to Database">
<db:parameterized-query>
UPDATE books
SET 'avalability' = #[payload['avalability']]
WHERE 'isbn'= #[payload['isbn']]
</db:parameterized-query>
</db:update>
If you want more example about working with DB please check:
https://www.mulesoft.com/library#!/?types=template&filters=Database

You can set the propertyName dynamically using:
#[message.outboundProperties.propertyName]=any value

Order by another table with Liferay's DynamicQuery

I have a problem while I'm making a Dynamic Query in Liferay 6. I'm trying to make a query to order JournalArticles based on their view count. The view count is specified in another table (AssetEntry).
I'm stuck with this:
DynamicQuery query = DynamicQueryFactoryUtil.forClass(
JournalArticle.class, "articleParent", PortalClassLoaderUtil.getClassLoader());
//adding criterions
query.add(...);
DynamicQuery dq0 = DynamicQueryFactoryUtil.forClass(AssetEntry.class, "asset",
PortalClassLoaderUtil.getClassLoader())
.setProjection(ProjectionFactoryUtil.property("asset.classPK"))
.add(PropertyFactoryUtil.forName("asset.companyId")
.eqProperty("articleParent.companyId"))
.add(PropertyFactoryUtil.forName("asset.groupId")
.eqProperty("articleParent.groupId"));
query.add(PropertyFactoryUtil.forName("articleParent.resourcePrimKey").in(dq0))
.addOrder(OrderFactoryUtil.desc("asset.viewCount"));
With this I get an error message saying: could not resolve property: asset of: com.liferay.portlet.journal.model.impl.JournalArticleImpl.
If I remove the addOrder-call, this error disappears. How should I add the order statement so the main query is aware of asset.viewCount?

AssetEntryQuery assetEntryQuery = new AssetEntryQuery();
assetEntryQuery.setClassName(JournalArticle.class.getName());
assetEntryQuery.setXXX //adding criterions
assetEntryQuery.setOrderByCol1("viewCount");
List<AssetEntry> assetEntries = AssetEntryServiceUtil.getEntries(assetEntryQuery);

I am afraid that there is no direct way to do this with the DynamicQuery API.
I think you would need to use Service builder Finders i.e. Custom Query with Service builder.

You can't use dynamic query because there is no direct reference from JournalArticle entity to AssetEntry entity.
One possibility is to retrieve ordered ids of articles from the AssetEntry table (basically you dq0), then do another query and do the sorting programatically (you have the ids ordered).
Finally I think that this line
query.add(PropertyFactoryUtil.forName("articleParent.resourcePrimKey").in(dq0))
doesn't do what you think it does. resoucePrimKey is reference to resource table for permissions. You need to use id column.