aokolnychyi commented on code in PR #8803:
URL: https://github.com/apache/iceberg/pull/8803#discussion_r1382325507
##########
api/src/main/java/org/apache/iceberg/Scan.java:
##########
@@ -77,6 +78,21 @@ public interface Scan<ThisT, T extends ScanTask, G extends
ScanTaskGroup<T>> {
*/
ThisT includeColumnStats();
+ /**
+ * Create a new scan from this that loads the column stats for the specific
columns with each data
+ * file. If the columns set is empty or <code>null</code> then all column
stats will be kept, if
+ * {@link #includeColumnStats()} is set.
+ *
+ * <p>Column stats include: value count, null value count, lower bounds, and
upper bounds.
+ *
+ * @param columnsToKeepStats column ids from the table's schema
Review Comment:
+1.
We have `select` that accepts `Collection<String> columns` below. I
understand using IDs is straightforward but someone has to do the conversion
from name to ID and we better do it ourselves behind this API. If an external
long-running process needs to ensure the ID did not change, it can that check
outside.
##########
api/src/main/java/org/apache/iceberg/Scan.java:
##########
@@ -77,6 +78,21 @@ public interface Scan<ThisT, T extends ScanTask, G extends
ScanTaskGroup<T>> {
*/
ThisT includeColumnStats();
+ /**
+ * Create a new scan from this that loads the column stats for the specific
columns with each data
+ * file. If the columns set is empty or <code>null</code> then all column
stats will be kept, if
+ * {@link #includeColumnStats()} is set.
+ *
+ * <p>Column stats include: value count, null value count, lower bounds, and
upper bounds.
+ *
+ * @param columnsToKeepStats column ids from the table's schema
Review Comment:
+1.
We have `select` that accepts `Collection<String> columns` below. I
understand using IDs is straightforward but someone has to do the conversion
from name to ID and we better do it ourselves behind this API. If an external
long-running process needs to ensure the ID did not change, it can perform that
check outside.
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