cloud-fan commented on a change in pull request #26656: [SPARK-27986][SQL]
Support ANSI SQL filter clause for aggregate expression
URL: https://github.com/apache/spark/pull/26656#discussion_r360388053
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File path: sql/core/src/test/resources/sql-tests/inputs/group-by-filter.sql
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@@ -0,0 +1,156 @@
+-- Test filter clause for aggregate expression.
+
+-- Test data.
+CREATE OR REPLACE TEMPORARY VIEW testData AS SELECT * FROM VALUES
+(1, 1), (1, 2), (2, 1), (2, 2), (3, 1), (3, 2), (null, 1), (3, null), (null,
null)
+AS testData(a, b);
+
+CREATE OR REPLACE TEMPORARY VIEW EMP AS SELECT * FROM VALUES
+ (100, "emp 1", date "2005-01-01", 100.00D, 10),
+ (100, "emp 1", date "2005-01-01", 100.00D, 10),
+ (200, "emp 2", date "2003-01-01", 200.00D, 10),
+ (300, "emp 3", date "2002-01-01", 300.00D, 20),
+ (400, "emp 4", date "2005-01-01", 400.00D, 30),
+ (500, "emp 5", date "2001-01-01", 400.00D, NULL),
+ (600, "emp 6 - no dept", date "2001-01-01", 400.00D, 100),
+ (700, "emp 7", date "2010-01-01", 400.00D, 100),
+ (800, "emp 8", date "2016-01-01", 150.00D, 70)
+AS EMP(id, emp_name, hiredate, salary, dept_id);
+
+CREATE OR REPLACE TEMPORARY VIEW DEPT AS SELECT * FROM VALUES
+ (10, "dept 1", "CA"),
+ (20, "dept 2", "NY"),
+ (30, "dept 3", "TX"),
+ (40, "dept 4 - unassigned", "OR"),
+ (50, "dept 5 - unassigned", "NJ"),
+ (70, "dept 7", "FL")
+AS DEPT(dept_id, dept_name, state);
+
+-- Aggregate with filter and empty GroupBy expressions.
+SELECT a, COUNT(b) FILTER (WHERE a >= 2) FROM testData;
+SELECT COUNT(a) FILTER (WHERE a = 1), COUNT(b) FILTER (WHERE a > 1) FROM
testData;
+SELECT COUNT(id) FILTER (WHERE hiredate = date "2001-01-01") FROM emp;
+SELECT COUNT(id) FILTER (WHERE hiredate = to_date('2001-01-01 00:00:00')) FROM
emp;
+SELECT COUNT(id) FILTER (WHERE hiredate = to_timestamp("2001-01-01 00:00:00"))
FROM emp;
+SELECT COUNT(id) FILTER (WHERE date_format(hiredate, "yyyy-MM-dd") =
"2001-01-01") FROM emp;
Review comment:
can we test something like `FILTER (WHERE a + b> 3)` ?
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