writeonce/database
shoney.arickathil 7cb4bcf0c3 feat(db2-delta): keys-resident updates append, indexes follow
- table.c: wo_row_update_field/_slot no longer refuse `resident: keys`,
  both converge on one new static row_apply_field_keys
- borrows (folds), shadow-checks uniqueness, appends the delta with the
  row's current offset as back-pointer, commits, THEN idx_remove_row +
  idx_add_row + wo_row_set_offset — failure through commit leaves the
  row's offset and index untouched
- nv decoded to a VM value before touching the materialised copy, since
  wo_row_release drops every slot through the runtime, not db_val_free
- borrow released on every exit, including every failure arm
- resident: all path (row_apply_field_slot) byte-for-byte unchanged;
  wal.c untouched — Tasks 1/2 already expose everything needed
- test_wal.c: plain field update read back, and an indexed scalar
  column updated then found via wo_idx_probe by its new value, gone
  from its old — both verified failing pre-implementation, passing after
- concern: idx_hash/idx_cols_equal/wo_idx_probe cast Text slots to
  db_text* unconditionally; a keys-resident borrow decodes Text to a VM
  wo_str* (different layout) — pre-existing, left untouched; tests use
  a scalar index to sidestep it

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
(cherry picked from commit 89c56a13ed9f4abd082bfcabb46f46bb53d39faa)
2026-08-30 20:37:27 +02:00
..
src feat(db2-delta): keys-resident updates append, indexes follow 2026-08-30 20:37:27 +02:00