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Tag: MarkLogic
SPARQL update with multiple targets
In my last post, I talked about using the bindings parameter of MarkLogic’s sem.sparql function to look for multiple values in a SPARQL query. It turns out that approach doesn’t work for SPARQL Update. Let’s look at how we can do it.
Binding multiple values
With MarkLogic’s SPARQL queries, we can bind values to constraint the query. Using this capability, we can gather information about something of interest. But what if I want to query against multiple values?
Scoping queries in the Optic API
Scoping queries can have a big impact on the performance of an Optic API query.
MarkLogic index data types
MarkLogic implicitly converts data types when populating type-specific indexes. Keep in mind that the Universal Index works with exactly what you give it.
Populating an array from numbered fields
When our input data has numbered fields that we want to convert to an array, how do we express that in MarkLogic’s Hub Central?
TDE Template – Unknown Table
Hub Central builds a TDE template for each entity for me, so why am I getting “SQL-TABLENOTFOUND — Unknown table”?
SPARQL Update and locks
MarkLogic’s sem.sparqlUpdate normally runs as a separate transaction, which has implications for how locks are managed.
Peer reviewing a NiFi flow
We’re used to doing reviews for source code. NiFi flows look different, but when they are part of your application’s code, it’s useful to have a review prior to committing. Here’s what I look for when I’m reviewing a flow.
Making updates safe for parallel processing
Protect yourself from the Lost Update problem in MarkLogic.