====
---- QUERY
# Test union with multiple legs each having const expressions.
# Expect codegen to be disabled for const expressions.
set DISABLE_CODEGEN_ROWS_THRESHOLD=1;
select 1,2,3 union all select 4,5,6 union all select 7,8,9 order by 1;
---- TYPES
tinyint,tinyint,tinyint
---- RESULTS
1,2,3
4,5,6
7,8,9
---- RUNTIME_PROFILE
00:UNION
   constant-operands=3
#SORT_NODE
ExecOption: Codegen Enabled
#UNION_NODE
ExecOption: Codegen Disabled for const scalar expressions, Codegen Enabled
====
---- QUERY
# Test insert statement with values (translated into UNION with const expressions).
# Expect codegen to be disabled for const expressions.
set DISABLE_CODEGEN_ROWS_THRESHOLD=1;
drop table if exists test_values_codegen;
create table test_values_codegen (c1 int, c2 timestamp, c3 string);
insert into test_values_codegen(c1) values (CAST(1+ceil(2.5)*3 as tinyint));
---- RUNTIME_PROFILE
00:UNION
   constant-operands=1
#UNION_NODE
ExecOption: Codegen Disabled for const scalar expressions, Codegen Enabled
====
---- QUERY
# Test insert statement with values having const scalar expressions.
# Expect codegen to be disabled for const expressions.
set DISABLE_CODEGEN_ROWS_THRESHOLD=1;
insert into test_values_codegen values
  (1+1, '2015-04-09 14:07:46.580465000', base64encode('hello world')),
  (CAST(1*2+2-5 as INT), CAST(1428421382 as timestamp),
   regexp_extract('abcdef123ghi456jkl','.*?(\\d+)',0));
---- RUNTIME_PROFILE
00:UNION
   constant-operands=2
#UNION_NODE
ExecOption: Codegen Disabled for const scalar expressions, Codegen Enabled
====
---- QUERY
# Test the result of above inserts with codegen disabled.
select * from test_values_codegen order by c1;
---- TYPES
int, timestamp, string
---- RESULTS
-1,2015-04-07 15:43:02,'abcdef123ghi456'
2,2015-04-09 14:07:46.580465000,'aGVsbG8gd29ybGQ='
10,NULL,'NULL'
====
---- QUERY
# Test union with const expressions in a subplan.
# Expect codegen enabled.
select count(c.c_custkey), count(v.tot_price)
from tpch_nested_parquet.customer c, (
  select sum(o_totalprice) tot_price from c.c_orders
  union
  select 9.99 tot_price) v;
---- TYPES
BIGINT, BIGINT
---- RESULTS
300000,249996
---- RUNTIME_PROFILE
01:SUBPLAN
|  03:UNION
|  |  constant-operands=1
#AGGREGATION_NODE (id=6)
ExecOption: Codegen Enabled
#UNION_NODE (id=3)
ExecOption: Codegen Enabled
#AGGREGATION_NODE (id=5)
ExecOption: Codegen Enabled
====