Kikyou1997 commented on code in PR #12987:
URL: https://github.com/apache/doris/pull/12987#discussion_r984484857
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fe/fe-core/src/main/java/org/apache/doris/statistics/ColumnStat.java:
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@@ -54,7 +51,7 @@
* For example:
* "@ndv = 10" means that the number distinct values is 10 in the whole table.
*/
-public class ColumnStats {
+public class ColumnStat {
Review Comment:
1. Is there any system support non-numric type to do the stats calculation?
Since we cannot find a proper way to map a value range of string type or
complex type to a limited numeric range, it's useless to keep anything like
LiteralExpr as min/max value.
2. I agreed that it shouldn't be modified, it should be copied when derive
stats
##########
fe/fe-core/src/main/java/org/apache/doris/statistics/ColumnStat.java:
##########
@@ -54,7 +51,7 @@
* For example:
* "@ndv = 10" means that the number distinct values is 10 in the whole table.
*/
-public class ColumnStats {
+public class ColumnStat {
Review Comment:
1. Is there any system support non-numeric type to do the stats calculation?
Since we cannot find a proper way to map a value range of string type or
complex type to a limited numeric range, it's useless to keep anything like
LiteralExpr as min/max value.
2. I agreed that it shouldn't be modified, it should be copied when derive
stats
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