[SPARK-28286][SQL][PYTHON][TESTS] Convert and port 'pivot.sql' into UDF test base

sql/core/src/test/resources/sql-tests/inputs/udf/udf-pivot.sql

@@ -0,0 +1,307 @@
+-- This test file was converted from pivot.sql.
+
+-- Note some test cases have been commented as the current integrated UDFs cannot handle complex types
+
+create temporary view courseSales as select * from values
+  ("dotNET", 2012, 10000),
+  ("Java", 2012, 20000),
+  ("dotNET", 2012, 5000),
+  ("dotNET", 2013, 48000),
+  ("Java", 2013, 30000)
+  as courseSales(course, year, earnings);
+
+create temporary view years as select * from values
+  (2012, 1),
+  (2013, 2)
+  as years(y, s);
+
+create temporary view yearsWithComplexTypes as select * from values
+  (2012, array(1, 1), map('1', 1), struct(1, 'a')),
+  (2013, array(2, 2), map('2', 2), struct(2, 'b'))
+  as yearsWithComplexTypes(y, a, m, s);
+
+-- pivot courses
+SELECT * FROM (
+  SELECT udf(year), course, earnings FROM courseSales
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR course IN ('dotNET', 'Java')
+);
+
+-- pivot years with no subquery
+SELECT * FROM courseSales
+PIVOT (
+  udf(sum(earnings))
+  FOR year IN (2012, 2013)
+);
+
+-- pivot courses with multiple aggregations
+SELECT * FROM (
+  SELECT year, course, earnings FROM courseSales
+)
+PIVOT (
+  udf(sum(earnings)), udf(avg(earnings))
+  FOR course IN ('dotNET', 'Java')
+);
+
+-- pivot with no group by column
+SELECT * FROM (
+  SELECT udf(course) as course, earnings FROM courseSales
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR course IN ('dotNET', 'Java')
+);
+
+-- pivot with no group by column and with multiple aggregations on different columns
+SELECT * FROM (
+  SELECT year, course, earnings FROM courseSales
+)
+PIVOT (
+  udf(sum(udf(earnings))), udf(min(year))
+  FOR course IN ('dotNET', 'Java')
+);
+
+-- pivot on join query with multiple group by columns
+SELECT * FROM (
+  SELECT course, year, earnings, udf(s) as s
+  FROM courseSales
+  JOIN years ON year = y
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR s IN (1, 2)
+);
+
+-- pivot on join query with multiple aggregations on different columns
+SELECT * FROM (
+  SELECT course, year, earnings, s
+  FROM courseSales
+  JOIN years ON year = y
+)
+PIVOT (
+  udf(sum(earnings)), udf(min(s))
+  FOR course IN ('dotNET', 'Java')
+);
+
+-- pivot on join query with multiple columns in one aggregation
+SELECT * FROM (
+  SELECT course, year, earnings, s
+  FROM courseSales
+  JOIN years ON year = y
+)
+PIVOT (
+  udf(sum(earnings * s))
+  FOR course IN ('dotNET', 'Java')
+);
+
+-- pivot with aliases and projection
+SELECT 2012_s, 2013_s, 2012_a, 2013_a, c FROM (
+  SELECT year y, course c, earnings e FROM courseSales
+)
+PIVOT (
+  udf(sum(e)) s, udf(avg(e)) a
+  FOR y IN (2012, 2013)
+);
+
+-- pivot with projection and value aliases
+SELECT firstYear_s, secondYear_s, firstYear_a, secondYear_a, c FROM (
+  SELECT year y, course c, earnings e FROM courseSales
+)
+PIVOT (
+  udf(sum(e)) s, udf(avg(e)) a
+  FOR y IN (2012 as firstYear, 2013 secondYear)
+);
+
+-- pivot years with non-aggregate function
+SELECT * FROM courseSales
+PIVOT (
+  udf(abs(earnings))
+  FOR year IN (2012, 2013)
+);
+
+-- pivot with one of the expressions as non-aggregate function
+SELECT * FROM (
+  SELECT year, course, earnings FROM courseSales
+)
+PIVOT (
+  udf(sum(earnings)), year
+  FOR course IN ('dotNET', 'Java')
+);
+
+-- pivot with unresolvable columns
+SELECT * FROM (
+  SELECT course, earnings FROM courseSales
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR year IN (2012, 2013)
+);
+
+-- pivot with complex aggregate expressions
+SELECT * FROM (
+  SELECT year, course, earnings FROM courseSales
+)
+PIVOT (
+  udf(ceil(udf(sum(earnings)))), avg(earnings) + 1 as a1
+  FOR course IN ('dotNET', 'Java')
+);
+
+-- pivot with invalid arguments in aggregate expressions
+SELECT * FROM (
+  SELECT year, course, earnings FROM courseSales
+)
+PIVOT (
+  sum(udf(avg(earnings)))
+  FOR course IN ('dotNET', 'Java')
+);
+
+-- pivot on multiple pivot columns
+SELECT * FROM (
+  SELECT course, year, earnings, s
+  FROM courseSales
+  JOIN years ON year = y
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR (course, year) IN (('dotNET', 2012), ('Java', 2013))
+);
+
+-- pivot on multiple pivot columns with aliased values
+SELECT * FROM (
+  SELECT course, year, earnings, s
+  FROM courseSales
+  JOIN years ON year = y
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR (course, s) IN (('dotNET', 2) as c1, ('Java', 1) as c2)
+);
+
+-- pivot on multiple pivot columns with values of wrong data types
+SELECT * FROM (
+  SELECT course, year, earnings, s
+  FROM courseSales
+  JOIN years ON year = y
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR (course, year) IN ('dotNET', 'Java')
+);
+
+-- pivot with unresolvable values
+SELECT * FROM courseSales
+PIVOT (
+  udf(sum(earnings))
+  FOR year IN (s, 2013)
+);
+
+-- pivot with non-literal values
+SELECT * FROM courseSales
+PIVOT (
+  udf(sum(earnings))
+  FOR year IN (course, 2013)
+);
+
+-- Complex type is not supported in the current UDF. Skipped for now.
+-- pivot on join query with columns of complex data types
+-- SELECT * FROM (
+--  SELECT course, year, a
+--  FROM courseSales
+--  JOIN yearsWithComplexTypes ON year = y
+--)
+--PIVOT (
+--  udf(min(a))
+--  FOR course IN ('dotNET', 'Java')
+--);
+
+-- Complex type is not supported in the current UDF. Skipped for now.
+-- pivot on multiple pivot columns with agg columns of complex data types
+-- SELECT * FROM (
+--  SELECT course, year, y, a
+--  FROM courseSales
+--  JOIN yearsWithComplexTypes ON year = y
+--)
+--PIVOT (
+--  udf(max(a))
+--  FOR (y, course) IN ((2012, 'dotNET'), (2013, 'Java'))
+--);
+
+-- pivot on pivot column of array type
+SELECT * FROM (
+  SELECT earnings, year, a
+  FROM courseSales
+  JOIN yearsWithComplexTypes ON year = y
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR a IN (array(1, 1), array(2, 2))
+);
+
+-- pivot on multiple pivot columns containing array type
+SELECT * FROM (
+  SELECT course, earnings, udf(year) as year, a
+  FROM courseSales
+  JOIN yearsWithComplexTypes ON year = y
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR (course, a) IN (('dotNET', array(1, 1)), ('Java', array(2, 2)))
+);
+
+-- pivot on pivot column of struct type
+SELECT * FROM (
+  SELECT earnings, year, s
+  FROM courseSales
+  JOIN yearsWithComplexTypes ON year = y
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR s IN ((1, 'a'), (2, 'b'))
+);
+
+-- pivot on multiple pivot columns containing struct type
+SELECT * FROM (
+  SELECT course, earnings, year, s
+  FROM courseSales
+  JOIN yearsWithComplexTypes ON year = y
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR (course, s) IN (('dotNET', (1, 'a')), ('Java', (2, 'b')))
+);
+
+-- pivot on pivot column of map type
+SELECT * FROM (
+  SELECT earnings, year, m
+  FROM courseSales
+  JOIN yearsWithComplexTypes ON year = y
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR m IN (map('1', 1), map('2', 2))
+);
+
+-- pivot on multiple pivot columns containing map type
+SELECT * FROM (
+  SELECT course, earnings, year, m
+  FROM courseSales
+  JOIN yearsWithComplexTypes ON year = y
+)
+PIVOT (
+  udf(sum(earnings))
+  FOR (course, m) IN (('dotNET', map('1', 1)), ('Java', map('2', 2)))
+);
+
+-- grouping columns output in the same order as input
+-- correctly handle pivot columns with different cases
+SELECT * FROM (
+  SELECT course, earnings, udf("a") as a, udf("z") as z, udf("b") as b, udf("y") as y,
+  udf("c") as c, udf("x") as x, udf("d") as d, udf("w") as w
+  FROM courseSales
+)
+PIVOT (
+  udf(sum(Earnings))
+  FOR Course IN ('dotNET', 'Java')
+);