배우기를 멈추는 사람은 20세건 80세건 늙은 것이다.

fun insertOverwrite(target: String, db: DB, table: Table, partition: String, columns: List) { execute( """ INSERT OVERWRITE TABLE ${db.name}.${table.name} PARTITION ($partition) SELECT /*+ REPARTITION(1) */ ${columns.concat(ConstUtil.COMMA)} FROM $target """.trimIndent() ) } https://stackoverflow.com/questions/46932373/how-to-consolidate-results-of-a-spark-sql-query-to-avoid-lots-of-small-files-..