WL#13369: Read only schema

Implement support for setting a single schema with all of its contents
to be 'read only' using the SQL statement:

  ALTER SCHEMA <schema name> READ ONLY [=] {0,1,DEFAULT}

Setting a schema to read only means that DDL modifying the schema or
any schema qualified entities will fail. It also means that write
operations on user data stored in one of the tables in the schema will
fail.

The read only option is ignored by bootstrap threads, upgrade code,
and slave replication threads.

In addition to the above functionality, some unrelated issues found
during testing have been fixed:

* While updating the validity of referencing views, we acquire
  referencing views and their schema based on object ids, and use
  their names to acquire MDL, both for the view and for the schema.
  However, we did this using the lettercase stored in the DD,
  whereas this should be lowercased when lower_case_table_names == 2.

* If an error was raised when the event scheduler was trying to
  schedule a new event, the scheduler would stop without logging
  an error message stating what the error was.

Change-Id: I7722bfecf6c97e3253ce795851e5ce1d5aa61f15

Author: ssorumgard

mysql-test/include/schema_read_only.inc

@@ -182,6 +182,7 @@ ROLE_ROUTINE_GRANTS
 ROLE_TABLE_GRANTS
 ROUTINES
 SCHEMATA
+SCHEMATA_EXTENSIONS
 SCHEMA_PRIVILEGES
 STATISTICS
 ST_GEOMETRY_COLUMNS

mysql-test/r/dd_is_compatibility_ci.result

@@ -182,6 +182,7 @@ ROLE_ROUTINE_GRANTS
 ROLE_TABLE_GRANTS
 ROUTINES
 SCHEMATA
+SCHEMATA_EXTENSIONS
 SCHEMA_PRIVILEGES
 STATISTICS
 ST_GEOMETRY_COLUMNS

mysql-test/r/dd_is_compatibility_cs.result

@@ -90,3 +90,26 @@ ERROR 42S02: Table 'test.t2' doesn't exist
 DROP TABLE t1;
 DROP PREPARE stmt;
 SET DEBUG_SYNC=RESET;
+#
+# WL#13369: Read only schema
+#
+# Test parsing of corrupted property string.
+#
+CREATE SCHEMA s;
+SELECT SCHEMA_NAME, OPTIONS FROM INFORMATION_SCHEMA.SCHEMATA_EXTENSIONS
+WHERE SCHEMA_NAME = 's';
+SCHEMA_NAME	OPTIONS
+s	
+SET debug = '+d,skip_dd_table_access_check';
+UPDATE mysql.schemata SET options = 'abc' WHERE name = 's';
+SELECT options FROM mysql.schemata WHERE name = 's';
+options
+abc
+SET debug = '+d,continue_on_property_string_parse_failure';
+SELECT SCHEMA_NAME, OPTIONS FROM INFORMATION_SCHEMA.SCHEMATA_EXTENSIONS
+WHERE SCHEMA_NAME = 's';
+SCHEMA_NAME	OPTIONS
+s	
+SET debug = DEFAULT;
+DROP SCHEMA s;
+Pattern "Could not parse key-value pairs in property string 'abc'" found

mysql-test/r/dd_is_debug.result

@@ -89,6 +89,7 @@ ROLE_ROUTINE_GRANTS
 ROLE_TABLE_GRANTS
 ROUTINES
 SCHEMATA
+SCHEMATA_EXTENSIONS
 SCHEMA_PRIVILEGES
 STATISTICS
 ST_GEOMETRY_COLUMNS
@@ -884,7 +885,7 @@ table_schema IN ('mysql', 'information_schema', 'test', 'mysqltest')
 AND table_name not like 'ndb%' AND table_name COLLATE utf8_general_ci not like 'innodb_%'
 GROUP BY TABLE_SCHEMA;
 TABLE_SCHEMA	count(*)
-information_schema	47
+information_schema	48
 mysql	31
 create table t1 (i int, j int);
 create trigger trg1 before insert on t1 for each row
@@ -1362,6 +1363,7 @@ ROLE_ROUTINE_GRANTS	information_schema.ROLE_ROUTINE_GRANTS	1
 ROLE_TABLE_GRANTS	information_schema.ROLE_TABLE_GRANTS	1
 ROUTINES	information_schema.ROUTINES	1
 SCHEMATA	information_schema.SCHEMATA	1
+SCHEMATA_EXTENSIONS	information_schema.SCHEMATA_EXTENSIONS	1
 SCHEMA_PRIVILEGES	information_schema.SCHEMA_PRIVILEGES	1
 STATISTICS	information_schema.STATISTICS	1
 ST_GEOMETRY_COLUMNS	information_schema.ST_GEOMETRY_COLUMNS	1
@@ -2490,6 +2492,7 @@ ROLE_ROUTINE_GRANTS	SPECIFIC_SCHEMA
 ROLE_TABLE_GRANTS	TABLE_SCHEMA
 ROUTINES	ROUTINE_SCHEMA
 SCHEMATA	SCHEMA_NAME
+SCHEMATA_EXTENSIONS	SCHEMA_NAME
 SCHEMA_PRIVILEGES	TABLE_SCHEMA
 STATISTICS	TABLE_SCHEMA
 ST_GEOMETRY_COLUMNS	TABLE_SCHEMA
@@ -2556,6 +2559,7 @@ ROLE_ROUTINE_GRANTS	SPECIFIC_SCHEMA
 ROLE_TABLE_GRANTS	TABLE_SCHEMA
 ROUTINES	ROUTINE_SCHEMA
 SCHEMATA	SCHEMA_NAME
+SCHEMATA_EXTENSIONS	SCHEMA_NAME
 SCHEMA_PRIVILEGES	TABLE_SCHEMA
 STATISTICS	TABLE_SCHEMA
 ST_GEOMETRY_COLUMNS	TABLE_SCHEMA

mysql-test/r/information_schema_ci.result

@@ -89,6 +89,7 @@ ROLE_ROUTINE_GRANTS
 ROLE_TABLE_GRANTS
 ROUTINES
 SCHEMATA
+SCHEMATA_EXTENSIONS
 SCHEMA_PRIVILEGES
 STATISTICS
 ST_GEOMETRY_COLUMNS
@@ -884,7 +885,7 @@ table_schema IN ('mysql', 'information_schema', 'test', 'mysqltest')
 AND table_name not like 'ndb%' AND table_name COLLATE utf8_general_ci not like 'innodb_%'
 GROUP BY TABLE_SCHEMA;
 TABLE_SCHEMA	count(*)
-information_schema	47
+information_schema	48
 mysql	31
 create table t1 (i int, j int);
 create trigger trg1 before insert on t1 for each row
@@ -1362,6 +1363,7 @@ ROLE_ROUTINE_GRANTS	information_schema.ROLE_ROUTINE_GRANTS	1
 ROLE_TABLE_GRANTS	information_schema.ROLE_TABLE_GRANTS	1
 ROUTINES	information_schema.ROUTINES	1
 SCHEMATA	information_schema.SCHEMATA	1
+SCHEMATA_EXTENSIONS	information_schema.SCHEMATA_EXTENSIONS	1
 SCHEMA_PRIVILEGES	information_schema.SCHEMA_PRIVILEGES	1
 STATISTICS	information_schema.STATISTICS	1
 ST_GEOMETRY_COLUMNS	information_schema.ST_GEOMETRY_COLUMNS	1
@@ -2490,6 +2492,7 @@ ROLE_ROUTINE_GRANTS	SPECIFIC_SCHEMA
 ROLE_TABLE_GRANTS	TABLE_SCHEMA
 ROUTINES	ROUTINE_SCHEMA
 SCHEMATA	SCHEMA_NAME
+SCHEMATA_EXTENSIONS	SCHEMA_NAME
 SCHEMA_PRIVILEGES	TABLE_SCHEMA
 STATISTICS	TABLE_SCHEMA
 ST_GEOMETRY_COLUMNS	TABLE_SCHEMA
@@ -2556,6 +2559,7 @@ ROLE_ROUTINE_GRANTS	SPECIFIC_SCHEMA
 ROLE_TABLE_GRANTS	TABLE_SCHEMA
 ROUTINES	ROUTINE_SCHEMA
 SCHEMATA	SCHEMA_NAME
+SCHEMATA_EXTENSIONS	SCHEMA_NAME
 SCHEMA_PRIVILEGES	TABLE_SCHEMA
 STATISTICS	TABLE_SCHEMA
 ST_GEOMETRY_COLUMNS	TABLE_SCHEMA

mysql-test/r/information_schema_cs.result

@@ -140,6 +140,7 @@ Database: information_schema
 | ROUTINES                              |
 | SCHEMA_PRIVILEGES                     |
 | SCHEMATA                              |
+| SCHEMATA_EXTENSIONS                   |
 | ST_GEOMETRY_COLUMNS                   |
 | ST_SPATIAL_REFERENCE_SYSTEMS          |
 | ST_UNITS_OF_MEASURE                   |
@@ -223,6 +224,7 @@ Database: INFORMATION_SCHEMA
 | ROUTINES                              |
 | SCHEMA_PRIVILEGES                     |
 | SCHEMATA                              |
+| SCHEMATA_EXTENSIONS                   |
 | ST_GEOMETRY_COLUMNS                   |
 | ST_SPATIAL_REFERENCE_SYSTEMS          |
 | ST_UNITS_OF_MEASURE                   |

mysql-test/r/mysqlshow_ci.result

@@ -139,6 +139,7 @@ Database: information_schema
 | ROLE_TABLE_GRANTS                     |
 | ROUTINES                              |
 | SCHEMATA                              |
+| SCHEMATA_EXTENSIONS                   |
 | SCHEMA_PRIVILEGES                     |
 | STATISTICS                            |
 | ST_GEOMETRY_COLUMNS                   |
@@ -222,6 +223,7 @@ Database: INFORMATION_SCHEMA
 | ROLE_TABLE_GRANTS                     |
 | ROUTINES                              |
 | SCHEMATA                              |
+| SCHEMATA_EXTENSIONS                   |
 | SCHEMA_PRIVILEGES                     |
 | STATISTICS                            |
 | ST_GEOMETRY_COLUMNS                   |