should be it

external/duckdb/test/sql/storage/compression/constant/constant_columns.test_slow

@@ -0,0 +1,110 @@
+# name: test/sql/storage/compression/constant/constant_columns.test_slow
+# description: Test storage of constant columns (columns that all have the same value)
+# group: [constant]
+
+# load the DB from disk
+load __TEST_DIR__/constant_columns.db
+
+# simple constant
+statement ok
+CREATE TABLE integers AS SELECT 1 i FROM range(1000000)
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM integers
+----
+1	1	1	1000000	1000000
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM integers WHERE i=1
+----
+1	1	1	1000000	1000000
+
+restart
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM integers
+----
+1	1	1	1000000	1000000
+
+# constant null
+statement ok
+CREATE TABLE nulls AS SELECT NULL i FROM range(1000000)
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM nulls
+----
+NULL	NULL	NULL	1000000	0
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM nulls WHERE i IS NULL
+----
+NULL	NULL	NULL	1000000	0
+
+restart
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM nulls
+----
+NULL	NULL	NULL	1000000	0
+
+# mix of constant and non-constant
+statement ok
+CREATE TABLE mixed_table AS SELECT CASE WHEN i < 1000000 then 1 else i end i FROM range(2000000) tbl(i)
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM mixed_table
+----
+1	1999999	2000000	2000000
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM mixed_table WHERE i=1
+----
+1	1	1000000	1000000
+
+restart
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM mixed_table
+----
+1	1999999	2000000	2000000
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM mixed_table WHERE i=1
+----
+1	1	1000000	1000000
+
+# mix of constant and non-constant NULL
+statement ok
+CREATE TABLE mixed_nulls AS SELECT CASE WHEN i < 1000000 then 1 else NULL end i FROM range(2000000) tbl(i)
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM mixed_nulls
+----
+1	1	2000000	1000000
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM mixed_nulls WHERE i=1
+----
+1	1	1000000	1000000
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM mixed_nulls WHERE i IS NULL
+----
+NULL	NULL	1000000	0
+
+restart
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM mixed_nulls
+----
+1	1	2000000	1000000
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM mixed_nulls WHERE i=1
+----
+1	1	1000000	1000000
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM mixed_nulls WHERE i IS NULL
+----
+NULL	NULL	1000000	0

external/duckdb/test/sql/storage/compression/constant/constant_columns_indexes.test_slow

@@ -0,0 +1,51 @@
+# name: test/sql/storage/compression/constant/constant_columns_indexes.test_slow
+# description: Test storage of constant columns with indexes
+# group: [constant]
+
+# load the DB from disk
+load __TEST_DIR__/constant_columns.db
+
+# simple constant
+statement ok
+CREATE TABLE integers AS SELECT i id,
+CASE WHEN i < 500000 THEN 1 ELSE NULL END i FROM range(1000000) tbl(i);
+
+statement ok
+CREATE INDEX i_index ON integers(id);
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM integers;
+----
+1	1	1	1000000	500000
+
+query II
+SELECT * FROM integers WHERE id = 1;
+----
+1	1
+
+query II
+SELECT * FROM integers WHERE id = 2;
+----
+2	1
+
+query II
+SELECT * FROM integers WHERE id = 999999;
+----
+999999	NULL
+
+restart
+
+query II
+SELECT * FROM integers WHERE id = 1;
+----
+1	1
+
+query II
+SELECT * FROM integers WHERE id = 2;
+----
+2	1
+
+query II
+SELECT * FROM integers WHERE id = 999999;
+----
+999999	NULL

external/duckdb/test/sql/storage/compression/constant/constant_columns_top_n.test_slow

@@ -0,0 +1,31 @@
+# name: test/sql/storage/compression/constant/constant_columns_top_n.test_slow
+# description: Test Top-N operation on constant columns
+# group: [constant]
+
+# load the DB from disk
+load __TEST_DIR__/constant_columns.db
+
+# simple constant
+statement ok
+CREATE TABLE integers AS SELECT 1 i FROM range(1000000)
+
+statement ok
+INSERT INTO integers SELECT 2 FROM range(1000000)
+
+query I
+SELECT * FROM integers ORDER BY i LIMIT 5
+----
+1
+1
+1
+1
+1
+
+query I
+SELECT * FROM integers ORDER BY i DESC LIMIT 5
+----
+2
+2
+2
+2
+2

external/duckdb/test/sql/storage/compression/constant/constant_columns_types.test_slow

@@ -0,0 +1,60 @@
+# name: test/sql/storage/compression/constant/constant_columns_types.test_slow
+# description: Test storage of constant columns with various types
+# group: [constant]
+
+# load the DB from disk
+load __TEST_DIR__/constant_columns_types.db
+
+foreach type <numeric> decimal(4,1) decimal(8,1) decimal(12,1) decimal(18,1)
+
+statement ok
+CREATE TABLE a AS SELECT 1::${type} i FROM range(1000000)
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM a
+----
+1	1	1	1000000	1000000
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM a WHERE i=1
+----
+1	1	1	1000000	1000000
+
+statement ok
+DROP TABLE a
+
+endloop
+
+# interval
+statement ok
+CREATE TABLE a AS SELECT interval 1 year i FROM range(1000000)
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM a
+----
+1 year	1 year	1000000	1000000
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM a WHERE i=interval 1 year
+----
+1 year	1 year	1000000	1000000
+
+statement ok
+DROP TABLE a
+
+# bool
+statement ok
+CREATE TABLE a AS SELECT false i FROM range(1000000)
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM a
+----
+false	false	1000000	1000000
+
+query IIII
+SELECT MIN(i), MAX(i), COUNT(*), COUNT(i) FROM a WHERE not i
+----
+false	false	1000000	1000000
+
+statement ok
+DROP TABLE a

external/duckdb/test/sql/storage/compression/constant/constant_columns_updates.test_slow

@@ -0,0 +1,32 @@
+# name: test/sql/storage/compression/constant/constant_columns_updates.test_slow
+# description: Test storage of constant columns with updates
+# group: [constant]
+
+# load the DB from disk
+load __TEST_DIR__/constant_columns.db
+
+# simple constant
+statement ok
+CREATE TABLE integers AS SELECT i id, 1 i FROM range(1000000) tbl(i)
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM integers
+----
+1	1	1	1000000	1000000
+
+query I
+UPDATE integers SET i=i+1 WHERE id%2=0
+----
+500000
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM integers
+----
+1	2	1.5	1000000	1000000
+
+restart
+
+query IIIII
+SELECT MIN(i), MAX(i), AVG(i), COUNT(*), COUNT(i) FROM integers
+----
+1	2	1.5	1000000	1000000