gengliangwang commented on a change in pull request #23714:
[SPARK-26744][SQL]Support schema validation in FileDataSourceV2 framework
URL: https://github.com/apache/spark/pull/23714#discussion_r256687500
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/FileScan.scala
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@@ -18,22 +18,29 @@ package org.apache.spark.sql.execution.datasources.v2
import org.apache.hadoop.fs.Path
-import org.apache.spark.sql.SparkSession
+import org.apache.spark.sql.{AnalysisException, SparkSession}
import org.apache.spark.sql.execution.PartitionedFileUtil
import org.apache.spark.sql.execution.datasources._
import org.apache.spark.sql.sources.v2.reader.{Batch, InputPartition, Scan}
-import org.apache.spark.sql.types.StructType
+import org.apache.spark.sql.types.{DataType, StructType}
abstract class FileScan(
sparkSession: SparkSession,
- fileIndex: PartitioningAwareFileIndex) extends Scan with Batch {
+ fileIndex: PartitioningAwareFileIndex,
+ readSchema: StructType) extends Scan with Batch {
Review comment:
In the PR description:
> the table schema is determined in `TableProvider.getTable`. The actual
read schema can be a subset of the table schema. This PR proposes to validate
the actual read schema in `FileScan`
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