Proposed fix for bug#24491 "using alias from source table in insert ...

on duplicate key".

INSERT ... SELECT ... ON DUPLICATE KEY UPDATE which was used in
stored routine or as prepared statement and which in its ON DUPLICATE
KEY clause erroneously tried to assign value to a column mentioned only
in its SELECT part was properly emitting error on the first execution
but succeeded on the second and following executions.

Code which is responsible for name resolution of fields mentioned in
UPDATE clause (e.g. see select_insert::prepare()) modifies table list
and Name_resolution_context used in this process. It uses
Name_resolution_context_state::save_state/restore_state() to revert
these modifications. Unfortunately those two methods failed to revert
properly modifications to TABLE_LIST::next_name_resolution_table
and this broke name resolution process for successive executions.

This patch fixes Name_resolution_context_state::save_state/restore_state()
in such way that it properly handles TABLE_LIST::next_name_resolution_table.


mysql-test/r/ps.result:
  Added test case for bug#24491 "using alias from source table in insert ...
  on duplicate key"
mysql-test/r/sp-error.result:
  Added test case for bug#24491 "using alias from source table in insert ...
  on duplicate key"
mysql-test/t/ps.test:
  Added test case for bug#24491 "using alias from source table in insert ...
  on duplicate key"
mysql-test/t/sp-error.test:
  Added test case for bug#24491 "using alias from source table in insert ...
  on duplicate key"
sql/item.h:
  Name_resolution_context::save_state/restore_state():
    At the moment these methods are used only by code implementing
    INSERT and INSERT ... SELECT statements. This code doesn't modify
   'next_name_resolution_table' member of table list element
    corresponding to the first table of SELECT clause (pointed by
    'first_name_resolution_table'). But it modifies table list element
    corresponding to the target table of INSERT (pointed by 'table_list')
    So these methods were changed to reflect this.

1 files changed, 19 insertions, 0 deletions

diff --git a/mysql-test/r/sp-error.result b/mysql-test/r/sp-error.result
index 63fd1bfff6d..e7e387f4348 100644
--- a/mysql-test/r/sp-error.result
+++ b/mysql-test/r/sp-error.result
@@ -1250,3 +1250,22 @@ ERROR HY000: View's SELECT contains a variable or parameter
 PREPARE stmt FROM "CREATE VIEW v AS SELECT ?";
 ERROR HY000: View's SELECT contains a variable or parameter
 DROP TABLE t1;
+drop tables if exists t1;
+drop procedure if exists bug24491;
+create table t1 (id int primary key auto_increment, value varchar(10));
+insert into t1 (id, value) values (1, 'FIRST'), (2, 'SECOND'), (3, 'THIRD');
+create procedure bug24491()
+insert into t1 (id, value) select * from (select 4 as i, 'FOURTH' as v) as y on duplicate key update v = 'DUP';
+call bug24491();
+ERROR 42S22: Unknown column 'v' in 'field list'
+call bug24491();
+ERROR 42S22: Unknown column 'v' in 'field list'
+drop procedure bug24491;
+create procedure bug24491()
+insert into t1 (id, value) select * from (select 4 as id, 'FOURTH' as value) as y on duplicate key update y.value = 'DUP';
+call bug24491();
+ERROR 42S22: Unknown column 'y.value' in 'field list'
+call bug24491();
+ERROR 42S22: Unknown column 'y.value' in 'field list'
+drop procedure bug24491;
+drop tables t1;