wypoon commented on code in PR #10659:
URL: https://github.com/apache/iceberg/pull/10659#discussion_r1986161732
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spark/v3.5/spark/src/main/java/org/apache/iceberg/spark/source/SparkScan.java:
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@@ -175,7 +186,43 @@ public Statistics estimateStatistics() {
protected Statistics estimateStatistics(Snapshot snapshot) {
// its a fresh table, no data
if (snapshot == null) {
- return new Stats(0L, 0L);
+ return new Stats(0L, 0L, Collections.emptyMap());
+ }
+
+ boolean cboEnabled =
+ Boolean.parseBoolean(spark.conf().get(SQLConf.CBO_ENABLED().key(),
"false"));
+ Map<NamedReference, ColumnStatistics> colStatsMap = Collections.emptyMap();
+ if (readConf.reportColumnStats() && cboEnabled) {
+ colStatsMap = Maps.newHashMap();
+ List<StatisticsFile> files = table.statisticsFiles();
+ if (!files.isEmpty()) {
+ List<BlobMetadata> metadataList = (files.get(0)).blobMetadata();
Review Comment:
As currently implemented, there is one `StatisticsFile` in the `List` for
any given `Snapshot`, but there could be multiple files (corresponding to
different `Snapshot`s). You can't just take the first file in the `List`.
I have put up a fix in https://github.com/apache/iceberg/pull/12482.
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