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

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if there are foreign key constraints on the table. (Bug #5574)
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marko@hundin.mysql.fi
2005-04-07 12:16:41 +03:00
parent 699c35c80e
commit b5328a7dbc
4 changed files with 33 additions and 0 deletions
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2
sql/handler.h
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@ -450,6 +450,8 @@ public:
virtual void append_create_info(String *packet) {}
virtual char* get_foreign_key_create_info()
{ return(NULL);} /* gets foreign key create string from InnoDB */
/* used in ALTER TABLE; 1 if changing storage engine is allowed */
virtual bool can_switch_engines() { return 1; }
/* used in REPLACE; is > 0 if table is referred by a FOREIGN KEY */
virtual uint referenced_by_foreign_key() { return 0;}
virtual void init_table_handle_for_HANDLER()