mariadb/mysql-test/suite/perfschema/t/digest_null_literal.test

# ----------------------------------------------------
# Tests for the performance schema statement Digests.
# ----------------------------------------------------

# Test case to show behavior of statements digest when
# parsing a NULL literal

--source include/not_embedded.inc
--source include/have_perfschema.inc
--source include/no_protocol.inc

TRUNCATE TABLE performance_schema.events_statements_summary_by_digest;

--disable_query_log

select NULL;
select NULL FROM DUAL;
select NULL, NULL;
select NULL, NULL, NULL, 1, 2, 3, NULL, NULL;

select 1 IS NULL;
select 2 IS NOT NULL;
select 1 IS NULL, 2 IS NULL, 3 IS NOT NULL, 4 IS NOT NULL;

create table foo (a int DEFAULT NULL, b int NOT NULL DEFAULT 1, c int NOT NULL);
drop table foo;

--enable_query_log

SELECT SCHEMA_NAME, DIGEST_TEXT, COUNT_STAR
  FROM performance_schema.events_statements_summary_by_digest;