diff options
Diffstat (limited to 'sql/ha_berkeley.cc')
| -rw-r--r-- | sql/ha_berkeley.cc | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/sql/ha_berkeley.cc b/sql/ha_berkeley.cc index e25640280a3..00df84e3797 100644 --- a/sql/ha_berkeley.cc +++ b/sql/ha_berkeley.cc @@ -340,6 +340,35 @@ const char **ha_berkeley::bas_ext() const { static const char *ext[]= { ha_berkeley_ext, NullS }; return ext; } +ulong ha_berkeley::index_flags(uint idx, uint part, bool all_parts) const +{ + ulong flags= (HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER | HA_KEYREAD_ONLY + | HA_READ_RANGE); + for (uint i= all_parts ? 0 : part ; i <= part ; i++) + { + if (table->key_info[idx].key_part[i].field->type() == FIELD_TYPE_BLOB) + { + /* We can't use BLOBS to shortcut sorts */ + flags&= ~(HA_READ_ORDER | HA_KEYREAD_ONLY | HA_READ_RANGE); + break; + } + switch (table->key_info[idx].key_part[i].field->key_type()) { + case HA_KEYTYPE_TEXT: + case HA_KEYTYPE_VARTEXT: + /* + As BDB stores only one copy of equal strings, we can't use key read + on these + */ + flags&= ~HA_KEYREAD_ONLY; + break; + default: // Keep compiler happy + break; + } + } + return flags; +} + + static int berkeley_cmp_hidden_key(DB* file, const DBT *new_key, const DBT *saved_key) { |