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Extending the Power of MariaDB ColumnStore With User-Defined Functions
MariaDB ColumnStore 1.0 supports User-Defined Functions (UDF) for query extensibility. This allows you to create custom filters and transformations to suit any need. This blog outlines adding support for distributed JSON query filtering.
An important MariaDB ColumnStore concept to grasp is that there are distributed and non-distributed functions. Distributed functions are executed at the PM nodes supporting query execution scale out. Nondistributed functions are MariaDB Server functions that are executed within the UM node. As a result, MariaDB ColumnStore requires two distinct implementations of any function.
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