andygrove commented on code in PR #1747: URL: https://github.com/apache/datafusion-comet/pull/1747#discussion_r2124215025
########## spark/src/main/scala/org/apache/comet/rules/CometScanRule.scala: ########## @@ -93,21 +93,63 @@ case class CometScanRule(session: SparkSession) extends Rule[SparkPlan] { return withInfos(scanExec, fallbackReasons.toSet) } - val scanImpl = COMET_NATIVE_SCAN_IMPL.get() - if (scanImpl == CometConf.SCAN_NATIVE_DATAFUSION && !COMET_EXEC_ENABLED.get()) { + var scanImpl = COMET_NATIVE_SCAN_IMPL.get() + + // if scan is auto then pick best available scan + if (scanImpl == SCAN_AUTO) { + // TODO these checks are not yet exhaustive. For example, native_datafusion does + // not support reading from object stores such as S3 yet + + val typeChecker = CometScanTypeChecker(SCAN_NATIVE_ICEBERG_COMPAT) + val schemaSupported = + typeChecker.isSchemaSupported(scanExec.requiredSchema, fallbackReasons) + val partitionSchemaSupported = + typeChecker.isSchemaSupported(r.partitionSchema, fallbackReasons) + + // additional checks for known issues + def isComplexType(dt: DataType): Boolean = dt match { + case _: StructType | _: ArrayType | _: MapType => true + case _ => false + } + + def hasKnownIssues(dataType: DataType): Boolean = { + dataType match { + case s: StructType => s.exists(field => hasKnownIssues(field.dataType)) + case a: ArrayType => hasKnownIssues(a.elementType) + case m: MapType => isComplexType(m.keyType) || isComplexType(m.valueType) + case _ => false + } + } + + val knownIssues = + scanExec.requiredSchema.exists(field => hasKnownIssues(field.dataType)) || + r.partitionSchema.exists(field => hasKnownIssues(field.dataType)) + + if (COMET_EXEC_ENABLED + .get() && schemaSupported && partitionSchemaSupported && + !scanExec.bucketedScan && !knownIssues) { + scanImpl = SCAN_NATIVE_ICEBERG_COMPAT + } + } + + if (scanImpl == SCAN_AUTO) { + scanImpl = SCAN_NATIVE_COMET Review Comment: I figured that we have more Spark SQL tests passing with `native_iceberg_compat` so we should start with that. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org