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row0mysql.c:

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Allow always DROPping of a table which is only referenced by FOREIGN KEY constraints from the same table
Many files:
  Do not let REPLACE to perform internally an UPDATE if the table is referenced by a FOREIGN KEY: the manual says that REPLACE must resolve a duplicate key error semantically with DELETE(s) + INSERT, and not by an UPDATE; the internal update caused foreign key checks and cascaded operations to behave in a semantically wrong way
This commit is contained in:
heikki@hundin.mysql.fi
2004-02-09 23:57:29 +02:00
parent d2d1e6f726
commit d9790a406c
7 changed files with 68 additions and 2 deletions
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10
sql/sql_insert.cc
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@ -442,7 +442,15 @@ int write_record(TABLE *table,COPY_INFO *info)
HA_READ_KEY_EXACT))))
goto err;
}
if (last_uniq_key(table,key_nr))
/*
The manual defines the REPLACE semantics that it is either an INSERT or
DELETE(s) + INSERT; FOREIGN KEY checks do not function in the defined
way if we allow MySQL to convert the latter operation internally to an
UPDATE.
*/
if (last_uniq_key(table,key_nr)
&& !table->file->referenced_by_foreign_key())
{
if ((error=table->file->update_row(table->record[1],table->record[0])))
goto err;