diff options
Diffstat (limited to 'sql/table.cc')
| -rw-r--r-- | sql/table.cc | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/sql/table.cc b/sql/table.cc index 37c0b630efc..a1e9ebfc0cc 100644 --- a/sql/table.cc +++ b/sql/table.cc @@ -1721,6 +1721,7 @@ int TABLE_SHARE::init_from_binary_frm_image(THD *thd, bool write, keyinfo= share->key_info; uint primary_key= my_strcasecmp(system_charset_info, share->keynames.type_names[0], primary_key_name) ? MAX_KEY : 0; + KEY* key_first_info; if (primary_key >= MAX_KEY && keyinfo->flags & HA_NOSAME) { @@ -1800,19 +1801,38 @@ int TABLE_SHARE::init_from_binary_frm_image(THD *thd, bool write, keyinfo->name_length+1); } + if (!key) + key_first_info= keyinfo; + if (ext_key_parts > share->key_parts && key) { KEY_PART_INFO *new_key_part= (keyinfo-1)->key_part + (keyinfo-1)->ext_key_parts; uint add_keyparts_for_this_key= add_first_key_parts; + uint length_bytes= 0, len_null_byte= 0, ext_key_length= 0; + Field *field; /* Do not extend the key that contains a component defined over the beginning of a field. */ for (i= 0; i < keyinfo->user_defined_key_parts; i++) - { + { uint fieldnr= keyinfo->key_part[i].fieldnr; + field= share->field[keyinfo->key_part[i].fieldnr-1]; + + if (field->null_ptr) + len_null_byte= HA_KEY_NULL_LENGTH; + + if (field->type() == MYSQL_TYPE_BLOB || + field->real_type() == MYSQL_TYPE_VARCHAR || + field->type() == MYSQL_TYPE_GEOMETRY) + { + length_bytes= HA_KEY_BLOB_LENGTH; + } + + ext_key_length+= keyinfo->key_part[i].length + len_null_byte + + length_bytes; if (share->field[fieldnr-1]->key_length() != keyinfo->key_part[i].length) { @@ -1821,6 +1841,23 @@ int TABLE_SHARE::init_from_binary_frm_image(THD *thd, bool write, } } + if (add_keyparts_for_this_key) + { + for (i= 0; i < add_keyparts_for_this_key; i++) + { + uint pk_part_length= key_first_info->key_part[i].store_length; + if (keyinfo->ext_key_part_map & 1<<i) + { + if (ext_key_length + pk_part_length > MAX_KEY_LENGTH) + { + add_keyparts_for_this_key= i; + break; + } + ext_key_length+= pk_part_length; + } + } + } + if (add_keyparts_for_this_key < (keyinfo->ext_key_parts - keyinfo->user_defined_key_parts)) { |