liviazhu commented on code in PR #52375:
URL: https://github.com/apache/spark/pull/52375#discussion_r2360524133
##########
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/FileMetadataStructSuite.scala:
##########
@@ -1133,4 +1133,98 @@ class FileMetadataStructSuite extends QueryTest with
SharedSparkSession {
assert(selectSingleRowDf.count() === 1)
}
}
+
+ Seq("true", "false").foreach { sideCharPadding =>
+ test(s"SPARK-53625: file metadata in streaming with char type, " +
+ s"sideCharPadding=$sideCharPadding") {
+ withSQLConf(SQLConf.READ_SIDE_CHAR_PADDING.key -> sideCharPadding) {
+ withTempDir { dir =>
+ import scala.jdk.CollectionConverters._
+
+ val metadata = new MetadataBuilder()
+ .putString("__CHAR_VARCHAR_TYPE_STRING", "char(1)")
+ .build()
+ val charSchemaStruct = new StructType()
+ .add(StructField("char_col", StringType, metadata = metadata))
+
+ val data: Seq[Row] = Seq(Row("A"), Row("B"))
+ val df = spark.createDataFrame(data.asJava, charSchemaStruct)
+ df.coalesce(1).write.format("json")
+ .save(dir.getCanonicalPath + "/source/new-streaming-data")
+
+ val streamDf = spark.readStream.format("json")
+ .schema(charSchemaStruct)
+ .load(dir.getCanonicalPath + "/source/new-streaming-data")
+ .select("*", "_metadata")
+
+ val streamQuery0 = streamDf
+ .writeStream.format("json")
+ .option("checkpointLocation", dir.getCanonicalPath +
"/target/checkpoint")
+ .trigger(Trigger.AvailableNow())
+ .start(dir.getCanonicalPath + "/target/new-streaming-data")
+
+ streamQuery0.awaitTermination()
+ assert(streamQuery0.lastProgress.numInputRows == 2L)
+
+ val newDF = spark.read.format("json")
+ .load(dir.getCanonicalPath + "/target/new-streaming-data")
+
+ val sourceFile = new File(dir,
"/source/new-streaming-data").listFiles()
+ .filter(_.getName.endsWith(".json")).head
+ val sourceFileMetadata = Map(
+ METADATA_FILE_PATH -> sourceFile.toURI.toString,
+ METADATA_FILE_NAME -> sourceFile.getName,
+ METADATA_FILE_SIZE -> sourceFile.length(),
+ METADATA_FILE_BLOCK_START -> 0,
+ METADATA_FILE_BLOCK_LENGTH -> sourceFile.length(),
+ METADATA_FILE_MODIFICATION_TIME -> new
Timestamp(sourceFile.lastModified())
+ )
+
+ // SELECT * will have: char_col, _metadata of
/source/new-streaming-data
+ assert(newDF.select("*").columns.toSet == Set("char_col",
"_metadata"))
+ // Verify the data is expected
+ checkAnswer(
+ newDF.select(col("char_col"),
+ col(METADATA_FILE_PATH), col(METADATA_FILE_NAME),
+ col(METADATA_FILE_SIZE), col(METADATA_FILE_BLOCK_START),
+ col(METADATA_FILE_BLOCK_LENGTH),
+ // since we are writing _metadata to a json file,
+ // we should explicitly cast the column to timestamp type
+ to_timestamp(col(METADATA_FILE_MODIFICATION_TIME))),
+ Seq(
+ Row(
+ "A",
+ sourceFileMetadata(METADATA_FILE_PATH),
+ sourceFileMetadata(METADATA_FILE_NAME),
+ sourceFileMetadata(METADATA_FILE_SIZE),
+ sourceFileMetadata(METADATA_FILE_BLOCK_START),
+ sourceFileMetadata(METADATA_FILE_BLOCK_LENGTH),
+ sourceFileMetadata(METADATA_FILE_MODIFICATION_TIME)),
+ Row(
+ "B",
+ sourceFileMetadata(METADATA_FILE_PATH),
+ sourceFileMetadata(METADATA_FILE_NAME),
+ sourceFileMetadata(METADATA_FILE_SIZE),
+ sourceFileMetadata(METADATA_FILE_BLOCK_START),
+ sourceFileMetadata(METADATA_FILE_BLOCK_LENGTH),
+ sourceFileMetadata(METADATA_FILE_MODIFICATION_TIME))
+ )
+ )
+
+ checkAnswer(
+ newDF.where(s"$METADATA_FILE_SIZE > 0").select(METADATA_FILE_SIZE),
Review Comment:
Yeah just a sanity check
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