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SparkSQL and CTE for increased readability
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val df = spark.read.text(inputFile) | |
df.createOrReplaceTempView("data") | |
val query = | |
""" | |
| WITH loglevel AS (SELECT SPLIT(value, ' ')[0] AS level FROM data WHERE LENGTH(value) > 0), | |
| levelcount AS (SELECT level, COUNT(*) as count FROM loglevel GROUP BY level) | |
| SELECT level, count FROM levelcount ORDER BY count DESC | |
""".stripMargin | |
val result = spark.sql(query) | |
println(result.rdd.toDebugString) | |
result.show() |
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