grundprinzip commented on code in PR #42099:
URL: https://github.com/apache/spark/pull/42099#discussion_r1270672439
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sql/catalyst/src/main/java/org/apache/spark/sql/connector/read/Scan.java:
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@@ -125,4 +125,26 @@ default CustomMetric[] supportedCustomMetrics() {
default CustomTaskMetric[] reportDriverMetrics() {
return new CustomTaskMetric[]{};
}
+
+ /**
+ * This enum defines how the columnar support for the partitions of the data
source
+ * should be determined. The default value is `PARTITION_DEFINED` which
indicates that each
+ * partition can deterine if it should be columnar or not. SUPPORTED and
UNSUPPORTED provide
+ * default shortcuts to indicate support for columnar data or not.
+ *
+ * @since 3.5.0
+ */
+ enum ColumnarSupportType {
+ PARTITION_DEFINED,
+ SUPPORTED,
+ UNSUPPORTED
+ }
+
+ /**
+ * Subclasses can implement this method to indicate if the support for
columnar data should
+ * be determined by each partition or is set as a default for the whole scan.
+ *
+ * @since 3.5.0
+ */
+ default ColumnarSupportType supportsColumnar() { return
ColumnarSupportType.PARTITION_DEFINED; }
Review Comment:
Will do!
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