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InnoDB: Prevent ALTER TABLE ... ENGINE=...

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if there are foreign key constraints on the table. (Bug #5574)


sql/ha_innodb.cc:
  Add method can_switch_engines()
sql/ha_innodb.h:
  Add method can_switch_engines()
sql/handler.h:
  Add method can_switch_engines()
sql/sql_table.cc:
  Check handler::can_switch_engines() before switching storage engines
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unknown 2005-04-07 12:16:41 +03:00
commit f7356d7391
4 changed files with 33 additions and 0 deletions
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sql/ha_innodb.h
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@ -161,6 +161,7 @@ class ha_innobase: public handler
int check(THD* thd, HA_CHECK_OPT* check_opt);
char* update_table_comment(const char* comment);
char* get_foreign_key_create_info();
bool can_switch_engines();
uint referenced_by_foreign_key();
void free_foreign_key_create_info(char* str);
THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,