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Bug #21096444: MYSQL IS TRYING TO PERFORM A CONSISTENT READ BUT THE READ VIEW IS NOT ASSIGNED!

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Issue: A select for update subquery in having clause
resulted deadlock and its transaction was rolled back
by innodb. val_XXX interfaces do not handle errors and
it do not propogate errors to its caller. sub_select
did not see this error when it called
evaluate_join_record and later made a call to innodb.
As transaction is rolled back innodb asserted.

Fix: Now evaluate_join_record checks if there is any
error reported and then return the same to its caller.
This commit is contained in:
Mithun C Y 2015-08-04 11:45:02 +05:30
parent 9372c9ebd2
commit c28626d0af
1 changed files with 5 additions and 0 deletions
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5
sql/sql_select.cc
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@ -11598,6 +11598,11 @@ evaluate_join_record(JOIN *join, JOIN_TAB *join_tab,
rc= (*join_tab->next_select)(join, join_tab+1, 0);
if (rc != NESTED_LOOP_OK && rc != NESTED_LOOP_NO_MORE_ROWS)
return rc;
/* check for errors evaluating the condition */
if (join->thd->is_error())
return NESTED_LOOP_ERROR;
if (join->return_tab < join_tab)
return NESTED_LOOP_OK;
/*