rohangarg commented on PR #14232:
URL: https://github.com/apache/druid/pull/14232#issuecomment-1600508796
@abhishekagarwal87 : An example of the intermediate DAG looks like :
```
DruidSort(sort0=[$2], sort1=[$0], dir0=[DESC], dir1=[ASC], druid=[logical]):
rowcount = 100.0, cumulative cost = {201.0 rows, 1067.0 cpu, 0.0 io}, id = 136
DruidProject(dim1=[$0], EXPR$1=[SUBSTRING($0, 2)],
EXPR$2=[CHAR_LENGTH($0)], druid=[logical]): rowcount = 100.0, cumulative cost =
{101.0 rows, 67.0 cpu, 0.0 io}, id = 135
DruidAggregate(group=[{1}], druid=[logical]): rowcount = 100.0,
cumulative cost = {101.0 rows, 17.0 cpu, 0.0 io}, id = 134
DruidTableScan(table=[[druid, foo]], druid=[logical]): rowcount =
1000.0, cumulative cost = {tiny}, id = 130
```
This is for the sql query :
```
SELECT
dim1, SUBSTRING(dim1, 2)
FROM druid.foo
GROUP BY dim1
ORDER BY CHARACTER_LENGTH(dim1) DESC, dim1
```
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