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The source code can be downloaded from https://github.com/esgyn/code-examples/tree/master/src/main/cpp/FilterProg.

Text Search using Lucene

Lucene is an Apache project written in Java that provides text indexing and searching capabilities.  In terms of function, the analogy for this particular use case is SQL's "LIKE" predicate (but Lucene offers more capabilities).  This TMUDF shows the basics of how to use those APIs.  A typical text index/search scenario involves many "documents" with a search result consisting of documents that match the search query.  For this UDF, indexing and matching is made row-by-row, that is, the index represents just the current row.  Also, an in-memory directory class is used rather than one on disk.

This example was developed with Lucene 5.5.2, a version using Java 7.  Later Lucene releases (> 6.x) use Java 8 and beyond.

The java source can be copied from:  https://github.com/esgyn/code-examples/tree/master/src/main/java/org/trafodion/examples/udrs/udfs/table_valued/lucene.

Manageability

Tools

SQL Scripts and Queries

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