# name: test/sql/vacuum/test_analyze.test
# description: Test the ANALYZE statement.
# group: [vacuum]

# The distinct statistics sampling relies on the vector size.
require vector_size 1024

require skip_reload

# Distinct statistics sampling is different for different vector sizes.
require no_vector_verification

statement ok
ANALYZE;

statement ok
VACUUM;

statement error
VACUUM test;
----
Table with name test does not exist

statement error
ANALYZE test;
----
Table with name test does not exist

statement ok
CREATE TABLE test (i INT, j INT);

statement ok
ANALYZE test;

statement ok
CREATE VIEW testview AS SELECT * FROM test;

statement error
ANALYZE testview;
----
Can only vacuum or analyze base tables

statement ok
INSERT INTO test SELECT range % 5000, range % 5000 FROM range(10000);

# The approximate unique count is inaccurate due to sampling.
query T
SELECT stats(i) FROM test LIMIT 1;
----
[Min: 0, Max: 4999][Has Null: false, Has No Null: true][Approx Unique: 10000]

query T
SELECT stats(j) FROM test LIMIT 1;
----
[Min: 0, Max: 4999][Has Null: false, Has No Null: true][Approx Unique: 10000]

statement ok
PRAGMA verify_parallelism;

statement ok
ANALYZE test(i);

statement ok
VACUUM test(i);

statement ok
PRAGMA disable_verify_parallelism;

# The approximate unique count for i is more accurate now.
query T
SELECT stats(i) FROM test LIMIT 1;
----
[Min: 0, Max: 4999][Has Null: false, Has No Null: true][Approx Unique: 5661]

# The approximate unique count for j is not yet accurate.
query T
SELECT stats(j) FROM test LIMIT 1;
----
[Min: 0, Max: 4999][Has Null: false, Has No Null: true][Approx Unique: 10000]

# Now we analyze the entire table.
statement ok
PRAGMA verify_parallelism;

statement ok
ANALYZE test;

statement ok
PRAGMA disable_verify_parallelism;

# The approximate unique count for i and j is more accurate now.
query T
SELECT stats(i) FROM test LIMIT 1;
----
[Min: 0, Max: 4999][Has Null: false, Has No Null: true][Approx Unique: 5661]

query T
SELECT stats(j) FROM test LIMIT 1;
----
[Min: 0, Max: 4999][Has Null: false, Has No Null: true][Approx Unique: 5661]