Make mysqltest to use --ps-protocol morebb-10.4-ps

use prepared statements for everything that server supports
with the exception of CALL (for now).

Fix discovered test failures and bugs.

tests:
* PROCESSLIST shows Execute state, not Query
* SHOW STATUS increments status variables more than in text protocol
* multi-statements should be avoided (see tests with a wrong delimiter)
* performance_schema events have different names in --ps-protocol

mysqltest.cc:
* make sure run_query_stmt() doesn't crash if there's
  no active connection (in wait_until_connected_again.inc)

sql_acl.cc:
* extract the functionality of getting the user for SHOW GRANTS
  from check_show_access(), so that mysql_test_show_grants() could
  generate the correct column names in the prepare step

sql_class.cc:
* result->prepare() can fail, don't ignore its return value
* use the correct metadata when creating a column for ANALYZE SELECT.
  The actual value is always FLOAT(4,2), but the column was created
  as FLOAT(4,10), so --ps and text protocols were using different number
  of decimals.

sql_parse.cc:
* discard profiling for SHOW PROFILE. In text protocol it's done in
  prepare_schema_table(), but in --ps it is called on prepare only,
  so nothing was discarding profiling during execute.
* move the permission checking code for SHOW CREATE VIEW to
  mysqld_show_create_get_fields(), so that it would be called during
  prepare step too.
* only set sel_result when it was created here and needs to be
  destroyed in the same block. Avoid destroying lex->result.
* use the correct number of tables in check_show_access(). Saying
  "as many as possible" doesn't work when first_not_own_table isn't
  set yet.

sql_prepare.cc:
* use correct user name for SHOW GRANTS columns
* don't ignore verbose flag for SHOW SLAVE STATUS
* support preparing REVOKE ALL and ROLLBACK TO SAVEPOINT
* don't ignore errors from thd->prepare_explain_fields()

sql_show.cc:
* check grants for SHOW CREATE VIEW here, not in mysql_execute_command

sql_tvc.cc:
* allocate Type_holder and items in the correct arena

sql_view.cc:
* use the correct function to check privileges. Old code was doing
  check_access() for thd->security_ctx, which is invoker's sctx,
  not definer's sctx. Hide various view related errors from the invoker.

1 files changed, 2 insertions, 0 deletions

diff --git a/sql/sql_acl.h b/sql/sql_acl.h
index 6da7d4d5db4..5c4a4d09e6d 100644
--- a/sql/sql_acl.h
+++ b/sql/sql_acl.h
@@ -258,6 +258,8 @@ void mysql_show_grants_get_fields(THD *thd, List<Item> *fields,
                                   const char *name, size_t length);
 bool mysql_show_grants(THD *thd, LEX_USER *user);
 bool mysql_show_create_user(THD *thd, LEX_USER *user);
+bool get_show_user(THD *thd, LEX_USER *lex_user, const char **username,
+                   const char **hostname, const char **rolename);
 int fill_schema_enabled_roles(THD *thd, TABLE_LIST *tables, COND *cond);
 int fill_schema_applicable_roles(THD *thd, TABLE_LIST *tables, COND *cond);
 void get_privilege_desc(char *to, uint max_length, ulong access);