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Don't automaticly generate a new key for a foreign key constraint if there is already a usable key.

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Prefer not automatic keys before automatic keys. If there is two conf
This commit is contained in:
monty@mysql.com
2004-05-12 00:29:52 +03:00
parent 6ad9691dc8
commit 116f61c656
14 changed files with 298 additions and 49 deletions
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10
sql/sql_class.h
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@ -240,14 +240,16 @@ public:
enum ha_key_alg algorithm;
List<key_part_spec> columns;
const char *name;
bool generated;
Key(enum Keytype type_par, const char *name_arg, enum ha_key_alg alg_par,
List<key_part_spec> &cols)
:type(type_par), algorithm(alg_par), columns(cols), name(name_arg)
bool generated_arg, List<key_part_spec> &cols)
:type(type_par), algorithm(alg_par), columns(cols), name(name_arg),
generated(generated_arg)
{}
~Key() {}
/* Equality comparison of keys (ignoring name) */
bool operator==(Key& other);
friend bool foreign_key_prefix(Key *a, Key *b);
};
class Table_ident;
@ -265,7 +267,7 @@ public:
foreign_key(const char *name_arg, List<key_part_spec> &cols,
Table_ident *table, List<key_part_spec> &ref_cols,
uint delete_opt_arg, uint update_opt_arg, uint match_opt_arg)
:Key(FOREIGN_KEY, name_arg, HA_KEY_ALG_UNDEF, cols),
:Key(FOREIGN_KEY, name_arg, HA_KEY_ALG_UNDEF, 0, cols),
ref_table(table), ref_columns(cols),
delete_opt(delete_opt_arg), update_opt(update_opt_arg),
match_opt(match_opt_arg)