Add minimal test for EXPLAIN ANALYZE of parallel query.

This displays the number of workers launched, thus the test is
dependant on configuration to some degree.  We'll see whether that
turns out ot be a problem.

Author: Rafia Sabih
Discussion: https://postgr.es/m/20170331185540.zmsue4ndvqtnayqw@alap3.anarazel.de

diff --git a/src/test/regress/expected/select_parallel.out b/src/test/regress/expected/select_parallel.out
index 2463f1ff98e4e8829df2f8da41e04d4bd1c7ad47..d65c2b93a8c888576fb831ca40b00ad15232fe60 100644 (file)
--- a/src/test/regress/expected/select_parallel.out
+++ b/src/test/regress/expected/select_parallel.out
@@ -280,6 +280,16 @@ explain (costs off)
          Index Cond: (unique1 = 1)
 (5 rows)
 
+-- to increase the parallel query test coverage
+EXPLAIN (analyze, timing off, summary off, costs off) SELECT * FROM tenk1;
+                         QUERY PLAN                          
+-------------------------------------------------------------
+ Gather (actual rows=10000 loops=1)
+   Workers Planned: 4
+   Workers Launched: 4
+   ->  Parallel Seq Scan on tenk1 (actual rows=2000 loops=5)
+(4 rows)
+
 -- provoke error in worker
 select stringu1::int2 from tenk1 where unique1 = 1;
 ERROR:  invalid input syntax for integer: "BAAAAA"

diff --git a/src/test/regress/sql/select_parallel.sql b/src/test/regress/sql/select_parallel.sql
index 53f4271c18252f739fc2c436dedbc4bb7cfbbd69..b2a0bd5d94a5758d8ce4a0110f7ad070c9799e72 100644 (file)
--- a/src/test/regress/sql/select_parallel.sql
+++ b/src/test/regress/sql/select_parallel.sql
@@ -116,6 +116,9 @@ set force_parallel_mode=1;
 explain (costs off)
   select stringu1::int2 from tenk1 where unique1 = 1;
 
+-- to increase the parallel query test coverage
+EXPLAIN (analyze, timing off, summary off, costs off) SELECT * FROM tenk1;
+
 -- provoke error in worker
 select stringu1::int2 from tenk1 where unique1 = 1;