Manual:Ip changes table/zh

Every time an edit by a logged out user is saved, a row is created in the ip_changes table. This stores the IP as a hex representation so that we can more easily find edits within an IP range. One of the primary purposes of the table is to support IP range queries at Special:Contributions. This table was introduced in.

ipc_rev_id
Foreign key to the table, also serves as the unique primary key.

ipc_rev_timestamp
The timestamp of the revision.

ipc_hex
Hex representation of the IP address, as returned by.


 * For IPv4 it will resemble:
 * 對於IPv6:

is then used to identify revisions within a given range.

Schema summary
+---+--+--+-+-+---+ +---+--+--+-+-+---+ +---+--+--+-+-+---+
 * Field            | Type             | Null | Key | Default | Extra |
 * ipc_rev_id       | int(10) unsigned | NO   | PRI | 0       |       |
 * ipc_rev_timestamp | binary(14)      | NO   | MUL | NULL    |       |
 * ipc_hex          | varbinary(35)    | NO   | MUL |         |       |

+---+--+--+-++---+ +---+--+--+-++---+ +---+--+--+-++---+
 * Field            | Type             | Null | Key | Default        | Extra |
 * ipc_rev_id       | int(10) unsigned | NO   | PRI | 0              |       |
 * ipc_rev_timestamp | binary(14)      | NO   | MUL |                |       |
 * ipc_hex          | varbinary(35)    | NO   | MUL |                |       |

Indexes
 +++---+--+---+---+-+--++--++-+---+ +++---+--+---+---+-+--++--++-+---+ +++---+--+---+---+-+--++--++-+---+
 * Table     | Non_unique | Key_name          | Seq_in_index | Column_name       | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
 * ip_changes |         0 | PRIMARY           |            1 | ipc_rev_id        | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * ip_changes |         1 | ipc_rev_timestamp |            1 | ipc_rev_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * ip_changes |         1 | ipc_hex_time      |            1 | ipc_hex           | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * ip_changes |         1 | ipc_hex_time      |            2 | ipc_rev_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |