diff options
Diffstat (limited to 'sql/field.h')
| -rw-r--r-- | sql/field.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sql/field.h b/sql/field.h index 5302b3de821..6706f85d368 100644 --- a/sql/field.h +++ b/sql/field.h @@ -592,6 +592,11 @@ public: } /* Hash value */ virtual void hash(ulong *nr, ulong *nr2); + + /* Check whether the field can be used as a join attribute in hash join */ + virtual bool hash_join_is_possible() { return TRUE; } + virtual bool eq_cmp_as_binary() { return TRUE; } + friend bool reopen_table(THD *,struct st_table *,bool); friend int cre_myisam(char * name, register TABLE *form, uint options, ulonglong auto_increment_value); @@ -767,6 +772,7 @@ public: my_decimal *val_decimal(my_decimal *); virtual bool str_needs_quotes() { return TRUE; } uint is_equal(Create_field *new_field); + bool eq_cmp_as_binary() { return test(flags & BINARY_FLAG); } }; @@ -1911,6 +1917,7 @@ public: uint size_of() const { return sizeof(*this); } int reset(void) { return !maybe_null() || Field_blob::reset(); } geometry_type get_geometry_type() { return geom_type; }; + bool hash_join_is_possible() { return FALSE; } }; #endif /*HAVE_SPATIAL*/ |