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The main commit of Andrey Zhakov's patch introducing vurtual(computed) columns.

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The original patch has been ameliorated by Sanja and Igor.
This commit is contained in:
Igor Babaev
2009-10-16 15:57:48 -07:00
parent 8ea19fa73e
commit f7a75b999b
122 changed files with 16338 additions and 180 deletions
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53
sql/sql_class.cc
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@@ -194,6 +194,59 @@ bool foreign_key_prefix(Key *a, Key *b)
#endif
}
/*
@brief
Check if the foreign key options are compatible with the specification
of the columns on which the key is created
@retval
FALSE The foreign key options are compatible with key columns
@retval
TRUE Otherwise
*/
bool Foreign_key::validate(List<Create_field> &table_fields)
{
Create_field *sql_field;
Key_part_spec *column;
List_iterator<Key_part_spec> cols(columns);
List_iterator<Create_field> it(table_fields);
DBUG_ENTER("Foreign_key::validate");
while ((column= cols++))
{
it.rewind();
while ((sql_field= it++) &&
my_strcasecmp(system_charset_info,
column->field_name,
sql_field->field_name)) {}
if (!sql_field)
{
my_error(ER_KEY_COLUMN_DOES_NOT_EXITS, MYF(0), column->field_name);
DBUG_RETURN(TRUE);
}
if (type == Key::FOREIGN_KEY && sql_field->vcol_info)
{
if (delete_opt == FK_OPTION_SET_NULL)
{
my_error(ER_WRONG_FK_OPTION_FOR_VIRTUAL_COLUMN, MYF(0),
"ON DELETE SET NULL");
DBUG_RETURN(TRUE);
}
if (update_opt == FK_OPTION_SET_NULL)
{
my_error(ER_WRONG_FK_OPTION_FOR_VIRTUAL_COLUMN, MYF(0),
"ON UPDATE SET NULL");
DBUG_RETURN(TRUE);
}
if (update_opt == FK_OPTION_CASCADE)
{
my_error(ER_WRONG_FK_OPTION_FOR_VIRTUAL_COLUMN, MYF(0),
"ON UPDATE CASCADE");
DBUG_RETURN(TRUE);
}
}
}
DBUG_RETURN(FALSE);
}
/****************************************************************************
** Thread specific functions