SQL: derived, hiding, error messages

Many related changes.

Note that AS OF condition must always be pushed down to physical tables,
it cannot be applied to a derived or a view. Thus:

* no versioning for internal temporary tables, they can never store
  historical data.
* remove special versioning code from mysql_derived_prepare and
  remove ER_VERS_DERIVED_PROHIBITED - derived can have no historical
  data and cannot be prohibited for system versioning related reasons.
* do not expand select list for derived/views with sys vers fields,
  derived/views can never have historical data.
* remove special invisiblity rules for sys vers fields, they are no
  longer needed after the previous change
* remove system_versioning_hide, it lost the meaning after the
  previous change.
* remove ER_VERS_SYSTEM_TIME_CLASH, it's no "clash", the inner
  AS OF clause always wins.
* non-versioned fields in a historical query

reword the warning text, downgrade to note, don't
replace values with NULLs

mysql-test/suite/versioning/t/cte.opt

@@ -1 +0,0 @@
---system-versioning-hide=implicit

mysql-test/suite/versioning/t/derived.test

@@ -99,16 +99,18 @@ delete from t1;
 insert into t1 values (2);
 insert into t2 values (10);
 
---error ER_VERS_DERIVED_PROHIBITED
+--replace_column 2 # 3 #
 select * from (select *, t1.sys_trx_end, t1.sys_trx_end as endo from t1) as s0;
---error ER_VERS_DERIVED_PROHIBITED
+--replace_column 3 # 4 #
 select * from (select *, t1.sys_trx_end, t2.sys_trx_start from t1, t2) as s0;
 
 --echo # SYSTEM_TIME propagation from inner to outer
 select * from (select * from t1 for system_time as of timestamp @t0, t2) as s0;
 with s1 as (select * from t1 for system_time as of timestamp @t0, t2) select * from s1;
 --echo # leading table selection
+--replace_column 3 #
 select * from (select *, t1.sys_trx_end from t2, t1 for system_time as of timestamp @t0) as s2;
+--replace_column 3 #
 with s3 as (select *, t1.sys_trx_end from t2, t1 for system_time as of timestamp @t0) select * from s3;
 
 --echo ### VIEW instead of t1
@@ -122,11 +124,11 @@ select * from vt1;
 select * from (select * from vt1, t2) as s0;
 
 --echo ### SYSTEM_TIME clash
---error ER_VERS_SYSTEM_TIME_CLASH
+--error ER_VERS_NOT_VERSIONED
 select * from (select * from t1 for system_time all) for system_time all as dt0;
---error ER_VERS_SYSTEM_TIME_CLASH
+--error ER_VERS_NOT_VERSIONED
 select * from vt1 for system_time all;
---error ER_VERS_SYSTEM_TIME_CLASH
+--error ER_VERS_NOT_VERSIONED
 with dt1 as (select * from t1 for system_time all)
 select * from dt1 for system_time all;
 

mysql-test/suite/versioning/t/foreign.opt

@@ -1 +0,0 @@
---system-versioning-hide=implicit

mysql-test/suite/versioning/t/partition.opt

@@ -1,3 +1 @@
---system-versioning-hide=implicit
 --system-versioning-alter-history=keep
-

mysql-test/suite/versioning/t/rpl.opt

@@ -1 +0,0 @@
---system-versioning-hide=implicit

mysql-test/suite/versioning/t/select.test

@@ -192,7 +192,7 @@ delete from t1 where x = 3;
 insert into t2 values (1);
 select * from t1, t2 for system_time all;
 
---error ER_VERS_SYSTEM_TIME_CLASH
+--error ER_VERS_NOT_VERSIONED
 select * from (select * from t1 for system_time all, t2 for system_time all)
 for system_time all as t;
 

mysql-test/suite/versioning/t/select_sp.test

@@ -219,7 +219,7 @@ delete from t1 where x = 3;
 insert into t2 values (1);
 select * from t1, t2 for system_time all;
 
---error ER_VERS_SYSTEM_TIME_CLASH
+--error ER_VERS_NOT_VERSIONED
 select * from (select * from t1 for system_time all, t2 for system_time all) for system_time all as t;
 --error ER_PARSE_ERROR
 select * from (t1 for system_time all join t2 for system_time all) for system_time all;

mysql-test/suite/versioning/t/sysvars.opt

@@ -1 +0,0 @@
---system-versioning-hide=implicit

mysql-test/suite/versioning/t/sysvars.test

@@ -76,37 +76,12 @@ set global system_versioning_asof= DEFAULT;
 set system_versioning_asof= DEFAULT;
 select @@global.system_versioning_asof, @@system_versioning_asof;
 
-show variables where variable_name = "system_versioning_hide";
 select * from t for system_time all;
 
-set system_versioning_hide= AUTO;
 select * from t;
 select * from t for system_time as of timestamp current_timestamp(6);
---replace_regex /\d{4}-\d\d-\d\d \d\d:\d\d:\d\d\.\d{6}/TIMESTAMP/
 select * from t for system_time all;
---replace_regex /\d{4}-\d\d-\d\d \d\d:\d\d:\d\d\.\d{6}/TIMESTAMP/
 select * from t for system_time from '0-0-0' to current_timestamp(6);
---replace_regex /\d{4}-\d\d-\d\d \d\d:\d\d:\d\d\.\d{6}/TIMESTAMP/
 select * from t for system_time between '0-0-0' and current_timestamp(6);
 
-set system_versioning_hide= NEVER;
---replace_regex /\d{4}-\d\d-\d\d \d\d:\d\d:\d\d\.\d{6}/TIMESTAMP/
-select * from t;
-
-set system_versioning_hide= FULL;
-create or replace table t (
-  x int,
-  st timestamp(6) as row start invisible,
-  en timestamp(6) as row end invisible,
-  period for system_time (st, en))
-with system versioning;
-
-show create table t;
-insert into t values (2);
-delete from t;
-
-select * from t;
-select * from t for system_time all;
-
 drop table t;
-set system_versioning_hide= IMPLICIT;

mysql-test/suite/versioning/t/truncate.opt

@@ -1,2 +1 @@
---system-versioning-hide=implicit
 --partition

mysql-test/suite/versioning/t/view.opt

@@ -1 +0,0 @@
---system-versioning-hide=implicit