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ircd:Ⓜ️:dbs: Add back the deprecated _event_bad descriptor marked for drop.

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This commit is contained in:
Jason Volk 2018-11-30 14:44:16 -08:00
parent 3f6ae85f8f
commit 17817db656
1 changed files with 56 additions and 0 deletions
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56
ircd/m/dbs.cc
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@ -3039,11 +3039,61 @@ ircd::m::dbs::desc::events_prev_state
size_t(events___event__meta_block__size),
};
//
// Other column descriptions
//
namespace ircd::m::dbs::desc
{
// Deprecated / dropped columns.
//
// These have to be retained for users that have yet to open their
// database with a newly released schema which has dropped a column
// from the schema. If the legacy descriptor is not provided here then
// the database will not know how to open the descriptor in order to
// conduct the drop.
extern const ircd::db::descriptor events__event_bad;
//
// Required by RocksDB
//
extern const ircd::db::descriptor events__default;
};
const ircd::db::descriptor
ircd::m::dbs::desc::events__event_bad
{
// name
"_event_bad",
// explanation
R"(
This column is deprecated and has been dropped from the schema. This
descriptor will erase its presence in the database upon next open.
)",
// typing (key, value)
{
typeid(string_view), typeid(uint64_t)
},
// options
{},
// comparator
{},
// prefix transform
{},
// drop column
true,
};
const ircd::db::descriptor
ircd::m::dbs::desc::events__default
{
@ -3145,4 +3195,10 @@ ircd::m::dbs::desc::events
// (room_id, event_id) => (event_idx)
// Mapping of all current head events for a room.
events__room_head,
//
// These columns are legacy; they have been dropped from the schema.
//
events__event_bad,
};