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The innoDB global variable srv_lower_case_table_names is set to the value of lower_case_table_names declared in mysqld.h server in ha_innodb.cc. Since this variable can change at runtime, it is reset for each handler call to ::create, ::open, ::rename_table & ::delete_table. But it is possible for tables to be implicitly opened before an explicit handler call is made when an engine is first started or restarted. I was able to reproduce that with the testcase in this patch on a version of InnoDB from 2 weeks ago. It seemed like the change buffer entries for the secondary key was getting put into pages after the restart. (But I am not sure, I did not write down the call stack while it was reproducing.) In the current code, the implicit open, which is actually a call to dict_load_foreigns(), does not occur with this testcase. The change is to replace srv_lower_case_table_names by an interface function in innodb.cc that retrieves the server global variable when it is needed. |
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| .. | ||
| ha_innodb.cc | ||
| ha_innodb.h | ||
| handler0alter.cc | ||
| i_s.cc | ||
| i_s.h | ||