Remove clear_insert_values() because it was far from trivial to handle the cleanup in all cases

(Old code failed for INSERT ... ON DUPLICATE with prepared statements) 
Instead, always reset table->insert_values on open.


mysql-test/t/trigger.test:
  Fix test for --ps-protocol
sql/sql_base.cc:
  Clear insert_values on open_table
sql/sql_insert.cc:
  Remove clear_insert_values()
sql/sql_parse.cc:
  Remove clear_insert_values()
sql/sql_prepare.cc:
  Remove clear_insert_values()
sql/table.cc:
  Remove clear_insert_values()
sql/table.h:
  Remove clear_insert_values()

1 files changed, 0 insertions, 3 deletions

diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc
index 1e03af7626c..096d6fa8e45 100644
--- a/sql/sql_parse.cc
+++ b/sql/sql_parse.cc
@@ -3009,9 +3009,6 @@ create_error:
 	lex->select_lex.resolve_mode= SELECT_LEX::INSERT_MODE;
         delete result;
       }
-      /* in case of error first_table->table can be 0 */
-      if (first_table->table)
-        first_table->table->insert_values= 0;
       /* revert changes for SP */
       lex->select_lex.table_list.first= (byte*) first_table;
     }