Github user xuchuanyin commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2936#discussion_r236565449
--- Diff:
core/src/main/java/org/apache/carbondata/core/constants/CarbonCommonConstants.java
---
@@ -1399,6 +1399,17 @@ private CarbonCommonConstants() {
public static final String CARBON_PUSH_ROW_FILTERS_FOR_VECTOR_DEFAULT =
"false";
+ /**
+ * max driver threads used for block pruning [1 to 4 threads]
+ */
+ @CarbonProperty public static final String
CARBON_MAX_DRIVER_THREADS_FOR_BLOCK_PRUNING =
+ "carbon.max.driver.threads.for.block.pruning";
+
+ public static final String
CARBON_MAX_DRIVER_THREADS_FOR_BLOCK_PRUNING_DEFAULT = "4";
+
+ // block prune in multi-thread if files size more than 100K files.
+ public static final int
CARBON_DRIVER_PRUNING_MULTI_THREAD_ENABLE_FILES_COUNT = 100000;
--- End diff --
Why add this constraint?
---
