mirror of
https://github.com/GreptimeTeam/greptimedb.git
synced 2026-10-15 00:12:29 +00:00
discord9
6106a6ea08
Converge the ordinary-label and __name__ paths that had forked during the rebase: - resolve_label_col() is the single label-to-column entry: __name__ reads the marked identity column, ordinary labels resolve like before but can no longer hit the marked column by its physical name, and a missing label is absent for every caller (label functions, aggregation, sort). - label_replace keeps one algorithm for every destination: read source (missing as ""), match anchored regex, expand captures (empty -> NULL), keep the old destination value when unmatched. Ordinary destinations may overwrite existing labels again (#9385 semantics); collapsing series is refused by the existing runtime label-set check instead of a plan-time InvalidDestinationLabelName. - write_destination_label() is the single destination-column entry for label_replace and label_join, so writing an empty label has one representation and a zero-source label_join on __name__ removes the identity instead of projecting an unmarked physical __name__ column. - drop_metric_name() now asserts a unique label set per evaluation timestamp when dropping the identity of a union that may ignore it (abs(a or on(__name__) b)), reusing assert_unique_match_group; TQL strip_metric_name_column() stays free of PromQL series checks. - sort_by_label(..., "__name__") on input without a name sorts by a missing label instead of failing with field_not_found. Production code is a net reduction (-38 lines); the removed ordinary-label regex branch, the overwrite tri-state and the duplicated destination construction are replaced by the three shared entries. Signed-off-by: discord9 <55937128+discord9@users.noreply.github.com>