Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/19874#discussion_r154855820 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecision.scala --- @@ -58,7 +58,7 @@ import org.apache.spark.sql.types._ * - FLOAT and DOUBLE cause fixed-length decimals to turn into DOUBLE */ // scalastyle:on -object DecimalPrecision extends Rule[LogicalPlan] { +object DecimalPrecision extends Rule[LogicalPlan] with TypePropagation { --- End diff -- one benefit of naming it `TypeCoercionRule` is, we can just do `object DecimalPrecision extends TypeCoercionRule`
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