MDEV-32503 Queries from I_S.KEY_PERIOD_USAGE do not obey case-sensitivity

Set the correct values for idx_field1, idx_field2 (i.e. db and table name
fields) of ST_SCHEMA_TABLE instance.

mysql-test/suite/period/r/i_s_notembedded,win.rdiff

+--- suite/period/r/i_s_notembedded.result	2024-01-01 19:50:37.000000000 +0100
++++ suite/period/r/i_s_notembedded,win.reject	2024-01-01 19:57:18.888306500 +0100
+@@ -69,13 +69,17 @@
+ set names latin1 collate latin1_general_cs;
+ select table_name from information_schema.periods where table_schema = 'TEST';
+ table_name
++t
+ select table_name from information_schema.key_period_usage where table_schema = 'TEST';
+ table_name
++t
+ set names latin1 collate latin1_general_ci;
+ select table_name from information_schema.periods where table_schema = 'TEST';
+ table_name
++t
+ select table_name from information_schema.key_period_usage where table_schema = 'TEST';
+ table_name
++t
+ # [DUPLICATE] MDEV-32504 Search by I_S.KEY_PERIOD_USAGE.CONSTRAINT_NAME
+ # does not work
+ select constraint_name from information_schema.key_period_usage where table_name = 't';

mysql-test/suite/period/r/i_s_notembedded.result

@@ -58,3 +58,25 @@ def	test	t2	mytime	s	e
 connection default;
 drop user periods_hidden@localhost;
 drop tables t1, t2;
+# MDEV-32503 Queries from KEY_PERIOD_USAGE don't obey case-sensitivity
+create table t (a int, b date, c date, period for app(b,c),
+unique idx(a, app without overlaps));
+set names latin1 collate latin1_general_cs;
+select table_name from information_schema.periods where table_schema = 'TEST';
+table_name
+select table_name from information_schema.key_period_usage where table_schema = 'TEST';
+table_name
+set names latin1 collate latin1_general_ci;
+select table_name from information_schema.periods where table_schema = 'TEST';
+table_name
+select table_name from information_schema.key_period_usage where table_schema = 'TEST';
+table_name
+# [DUPLICATE] MDEV-32504 Search by I_S.KEY_PERIOD_USAGE.CONSTRAINT_NAME
+# does not work
+select constraint_name from information_schema.key_period_usage where table_name = 't';
+constraint_name
+idx
+select constraint_name from information_schema.key_period_usage where constraint_name = 'idx';
+constraint_name
+idx
+drop table t;

mysql-test/suite/period/t/i_s_notembedded.test

 --source include/not_embedded.inc
+--source include/platform.inc
 
 select * from information_schema.periods;
 
@@ -47,3 +48,27 @@ select * from information_schema.periods where table_schema = 'test';
 --connection default
 drop user periods_hidden@localhost;
 drop tables t1, t2;
+
+--echo # MDEV-32503 Queries from KEY_PERIOD_USAGE don't obey case-sensitivity
+
+create table t (a int, b date, c date, period for app(b,c),
+                unique idx(a, app without overlaps));
+
+
+set names latin1 collate latin1_general_cs;
+
+select table_name from information_schema.periods where table_schema = 'TEST';
+select table_name from information_schema.key_period_usage where table_schema = 'TEST';
+set names latin1 collate latin1_general_ci;
+
+select table_name from information_schema.periods where table_schema = 'TEST';
+select table_name from information_schema.key_period_usage where table_schema = 'TEST';
+
+--echo # [DUPLICATE] MDEV-32504 Search by I_S.KEY_PERIOD_USAGE.CONSTRAINT_NAME
+--echo # does not work
+disable_warnings; # storage engine 'Innodb' is not found 
+select constraint_name from information_schema.key_period_usage where table_name = 't';
+select constraint_name from information_schema.key_period_usage where constraint_name = 'idx';
+enable_warnings;
+
+drop table t;

sql/sql_show.cc

@@ -10360,7 +10360,7 @@ ST_SCHEMA_TABLE schema_tables[]=
    get_all_tables, 0, get_schema_key_column_usage_record, 4, 5, 0,
    OPTIMIZE_I_S_TABLE|OPEN_TABLE_ONLY},
   {"KEY_PERIOD_USAGE", Show::key_period_usage_fields_info, 0,
-   get_all_tables, 0, get_schema_key_period_usage_record, 1, 2, 0,
+   get_all_tables, 0, get_schema_key_period_usage_record, 4, 5, 0,
    OPTIMIZE_I_S_TABLE | OPEN_FRM_FILE_ONLY},
   {"OPEN_TABLES", Show::open_tables_fields_info, 0,
    fill_open_tables, make_old_format, 0, -1, -1, 1, 0},