gatorsmile commented on a change in pull request #24743: 
[WIP][SPARK-27883][SQL] Port AGGREGATES.sql [Part 2]
URL: https://github.com/apache/spark/pull/24743#discussion_r289277628
 
 

 ##########
 File path: 
sql/core/src/test/resources/sql-tests/results/pgSQL/aggregates_part2.sql.out
 ##########
 @@ -0,0 +1,320 @@
+-- Automatically generated by SQLQueryTestSuite
+-- Number of queries: 28
+
+
+-- !query 0
+-- boolean and transitions
+     -- null because strict
+     -- and actual computations
+
+     -- boolean or transitions
+     -- null because strict
+     -- actual computations
+
+
+
+
+
+
+
+
+explain
+  select min(unique1) from tenk1
+-- !query 0 schema
+struct<plan:string>
+-- !query 0 output
+== Physical Plan ==
+*HashAggregate(keys=[], functions=[min(unique1#x)])
++- *HashAggregate(keys=[], functions=[partial_min(unique1#x)])
+   +- *Project [unique1#x]
+      +- *BatchScan[unique1#x] CSVScan Location: 
InMemoryFileIndex[file:/Users/yumwang/SPARK-27883/spark/sql/core/target/scala-2.12/test-classes/t...,
 ReadSchema: struct<unique1:int>
+
+
+-- !query 1
+select min(unique1) from tenk1
+-- !query 1 schema
+struct<min(unique1):int>
+-- !query 1 output
+0
+
+
+-- !query 2
+explain
+  select max(unique1) from tenk1
+-- !query 2 schema
+struct<plan:string>
+-- !query 2 output
+== Physical Plan ==
+*HashAggregate(keys=[], functions=[max(unique1#x)])
++- *HashAggregate(keys=[], functions=[partial_max(unique1#x)])
+   +- *Project [unique1#x]
+      +- *BatchScan[unique1#x] CSVScan Location: 
InMemoryFileIndex[file:/Users/yumwang/SPARK-27883/spark/sql/core/target/scala-2.12/test-classes/t...,
 ReadSchema: struct<unique1:int>
+
+
+-- !query 3
+select max(unique1) from tenk1
+-- !query 3 schema
+struct<max(unique1):int>
+-- !query 3 output
+9999
+
+
+-- !query 4
+explain
+  select max(unique1) from tenk1 where unique1 < 42
+-- !query 4 schema
+struct<plan:string>
+-- !query 4 output
+== Physical Plan ==
+*HashAggregate(keys=[], functions=[max(unique1#x)])
++- *HashAggregate(keys=[], functions=[partial_max(unique1#x)])
+   +- *Project [unique1#x]
+      +- *Filter (isnotnull(unique1#x) AND (unique1#x < 42))
+         +- *BatchScan[unique1#x] CSVScan Location: 
InMemoryFileIndex[file:/Users/yumwang/SPARK-27883/spark/sql/core/target/scala-2.12/test-classes/t...,
 ReadSchema: struct<unique1:int>
+
+
+-- !query 5
+select max(unique1) from tenk1 where unique1 < 42
+-- !query 5 schema
+struct<max(unique1):int>
+-- !query 5 output
+41
+
+
+-- !query 6
+explain
+  select max(unique1) from tenk1 where unique1 > 42
+-- !query 6 schema
+struct<plan:string>
+-- !query 6 output
+== Physical Plan ==
+*HashAggregate(keys=[], functions=[max(unique1#x)])
++- *HashAggregate(keys=[], functions=[partial_max(unique1#x)])
+   +- *Project [unique1#x]
+      +- *Filter (isnotnull(unique1#x) AND (unique1#x > 42))
+         +- *BatchScan[unique1#x] CSVScan Location: 
InMemoryFileIndex[file:/Users/yumwang/SPARK-27883/spark/sql/core/target/scala-2.12/test-classes/t...,
 ReadSchema: struct<unique1:int>
+
+
+-- !query 7
+select max(unique1) from tenk1 where unique1 > 42
+-- !query 7 schema
+struct<max(unique1):int>
+-- !query 7 output
+9999
+
+
+-- !query 8
+explain
+  select max(unique1) from tenk1 where unique1 > 42000
+-- !query 8 schema
+struct<plan:string>
+-- !query 8 output
+== Physical Plan ==
+*HashAggregate(keys=[], functions=[max(unique1#x)])
++- *HashAggregate(keys=[], functions=[partial_max(unique1#x)])
+   +- *Project [unique1#x]
+      +- *Filter (isnotnull(unique1#x) AND (unique1#x > 42000))
+         +- *BatchScan[unique1#x] CSVScan Location: 
InMemoryFileIndex[file:/Users/yumwang/SPARK-27883/spark/sql/core/target/scala-2.12/test-classes/t...,
 ReadSchema: struct<unique1:int>
+
+
+-- !query 9
+select max(unique1) from tenk1 where unique1 > 42000
+-- !query 9 schema
+struct<max(unique1):int>
+-- !query 9 output
+NULL
 
 Review comment:
   That is how postgreSQL displays NULL, right?

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