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LuceneRDD: Example using Quora Question Pairs Dataset
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| import org.zouzias.spark.lucenerdd.LuceneRDD | |
| import org.zouzias.spark.lucenerdd._ | |
| val df = spark.read.parquet("spark-lucenerdd/quora_duplicate_questions.parquet") | |
| val linker = {r: Row => { val tokens = r.getString(r.fieldIndex("question1")).split(" ").map(_.replaceAll("[^a-zA-Z0-9]", "")).filter(_.length > 3).mkString(" AND ") | |
| if (tokens.nonEmpty) s"question1:(${tokens})" else "*:*"}} | |
| val linkage = rdd.linkDataFrame(df, linker,1) | |
| linkage.take(10).map(x => (x._1.getString(3), x._2.headOption)).foreach(println) |
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