Fixes for CREATE_OR_REPLACE

- MDEV-5587 Server crashes in Locked_tables_list::restore_lock on CREATE OR REPLACE .. SELECT under LOCK
- MDEV-5586 Assertion `share->tdc.all_tables.is_empty() || remove_type != TDC_RT_REMOVE_ALL' fails in tdc_remove_table
- MDEV-5588 Strange error on CREATE OR REPLACE table over an existing view

mysql-test/r/create_or_replace.result:
  Added test cases
mysql-test/r/lowercase_view.result:
  New error message
mysql-test/r/merge.result:
  New error message
mysql-test/r/multi_update.result:
  New error message
mysql-test/r/subselect.result:
  New error message
mysql-test/r/subselect_exists_to_in.result:
  New error message
mysql-test/r/subselect_no_mat.result:
  New error message
mysql-test/r/subselect_no_opts.result:
  New error message
mysql-test/r/subselect_no_scache.result:
  New error message
mysql-test/r/subselect_no_semijoin.result:
  New error message
mysql-test/r/view.result:
  New error message
mysql-test/suite/funcs_1/r/myisam_views-big.result:
  New error message
mysql-test/t/create_or_replace.test:
  New tests
mysql-test/t/view.test:
  New error message
sql/share/errmsg-utf8.txt:
  Added new error message
sql/sql_base.cc:
  Updated error message
  Do an automatic UNLOCK TABLES if we don't have any locked tables (safety fix)
sql/sql_db.cc:
  Updated arguments
sql/sql_load.cc:
  New error message
sql/sql_parse.cc:
  Check that we are not using a table we are dropping and re-creating
sql/sql_table.cc:
  Added parameter to mysql_rm_table_no_locks() to not automaticly do UNLOCK TABLES
  Added better error message if trying to drop a view with DROP TABLE
  Don't try to create something we select from
sql/sql_table.h:
  Updated prototypes

1 files changed, 7 insertions, 7 deletions

diff --git a/mysql-test/r/subselect_no_scache.result b/mysql-test/r/subselect_no_scache.result
index 40a63afb1c6..2bc182ac6e9 100644
--- a/mysql-test/r/subselect_no_scache.result
+++ b/mysql-test/r/subselect_no_scache.result
@@ -585,7 +585,7 @@ a	b
 1	11
 2	12
 update t1 set b= (select b from t1);
-ERROR HY000: You can't specify target table 't1' for update in FROM clause
+ERROR HY000: Table 't1' is specified twice, both as a target for 'UPDATE' and as a separate source for data
 update t1 set b= (select b from t2);
 ERROR 21000: Subquery returns more than 1 row
 update t1 set b= (select b from t2 where t1.a = t2.a);
@@ -608,7 +608,7 @@ select * from t1 where b = (select b from t2 where t1.a = t2.a);
 a	b
 2	12
 delete from t1 where b in (select b from t1);
-ERROR HY000: You can't specify target table 't1' for update in FROM clause
+ERROR HY000: Table 't1' is specified twice, both as a target for 'DELETE' and as a separate source for data
 delete from t1 where b = (select b from t2);
 ERROR 21000: Subquery returns more than 1 row
 delete from t1 where b = (select b from t2 where t1.a = t2.a);
@@ -634,7 +634,7 @@ a	b
 22	11
 2	12
 delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t12 where t11.a = t12.a);
-ERROR HY000: You can't specify target table 't12' for update in FROM clause
+ERROR HY000: Table 't12' is specified twice, both as a target for 'DELETE' and as a separate source for data
 delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2);
 ERROR 21000: Subquery returns more than 1 row
 delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2 where t11.a = t2.a);
@@ -653,7 +653,7 @@ create table t3 (b int);
 insert into t2 values (1);
 insert into t3 values (1),(2);
 INSERT INTO t1 (x) VALUES ((SELECT x FROM t1));
-ERROR HY000: You can't specify target table 't1' for update in FROM clause
+ERROR HY000: Table 't1' is specified twice, both as a target for 'INSERT' and as a separate source for data
 INSERT INTO t1 (x) VALUES ((SELECT b FROM t3));
 ERROR 21000: Subquery returns more than 1 row
 INSERT INTO t1 (x) VALUES ((SELECT a FROM t2));
@@ -703,7 +703,7 @@ insert into t3 values (1),(2);
 select * from t1;
 x	y
 replace into t1 (x, y) VALUES ((SELECT x FROM t1), (SELECT a+1 FROM t2));
-ERROR HY000: You can't specify target table 't1' for update in FROM clause
+ERROR HY000: Table 't1' is specified twice, both as a target for 'INSERT' and as a separate source for data
 replace into t1 (x, y) VALUES ((SELECT a FROM t3), (SELECT a+1 FROM t2));
 ERROR 21000: Subquery returns more than 1 row
 replace into t1 (x, y) VALUES ((SELECT a FROM t2), (SELECT a+1 FROM t2));
@@ -771,9 +771,9 @@ SELECT * FROM t2 WHERE id IN (SELECT 5 UNION SELECT 2);
 id
 2
 INSERT INTO t2 VALUES ((SELECT * FROM t2));
-ERROR HY000: You can't specify target table 't2' for update in FROM clause
+ERROR HY000: Table 't2' is specified twice, both as a target for 'INSERT' and as a separate source for data
 INSERT INTO t2 VALUES ((SELECT id FROM t2));
-ERROR HY000: You can't specify target table 't2' for update in FROM clause
+ERROR HY000: Table 't2' is specified twice, both as a target for 'INSERT' and as a separate source for data
 SELECT * FROM t2;
 id
 1