context: take advantage of `_descendantrev` in introrev if available
Before this changeset, `_descendantrev` was ignored and `introrev` could
return a "wrong" result. I was previously fine because there seems to be no
existing code using both `introrev` and `_descendantrev` at the same time.
However, we would like to change that.
CREATE TABLE `bookmarkstonode` (
`node` varbinary(64) NOT NULL,
`bookmark` varbinary(512) NOT NULL,
`reponame` varbinary(255) NOT NULL,
PRIMARY KEY (`reponame`,`bookmark`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE `bundles` (
`bundle` varbinary(512) NOT NULL,
`reponame` varbinary(255) NOT NULL,
PRIMARY KEY (`bundle`,`reponame`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE `nodestobundle` (
`node` varbinary(64) NOT NULL,
`bundle` varbinary(512) NOT NULL,
`reponame` varbinary(255) NOT NULL,
PRIMARY KEY (`node`,`reponame`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE `nodesmetadata` (
`node` varbinary(64) NOT NULL,
`message` mediumblob NOT NULL,
`p1` varbinary(64) NOT NULL,
`p2` varbinary(64) DEFAULT NULL,
`author` varbinary(255) NOT NULL,
`committer` varbinary(255) DEFAULT NULL,
`author_date` bigint(20) NOT NULL,
`committer_date` bigint(20) DEFAULT NULL,
`reponame` varbinary(255) NOT NULL,
`optional_json_metadata` mediumblob,
PRIMARY KEY (`reponame`,`node`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;