dshash: Add sequential scan support. Add ability to scan all entries sequentially to dshash. The interface is similar but a bit different both from that of dynahash and simple dshash search functions. The most significant differences is that dshash's interfac always needs a call to dshash_seq_term when scan ends. Another is locking. Dshash holds partition lock when returning an entry, dshash_seq_next() also holds lock when returning an entry but callers shouldn't release it, since the lock is essential to continue a scan. The seqscan interface allows entry deletion while a scan is in progress using dshash_delete_current().
Reviewed-By: Andres Freund <and...@anarazel.de> Author: Kyotaro Horiguchi <horikyoga....@gmail.com> Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/352d297dc74feb0bf0dcb255cc0dfaaed2b96c1e Modified Files -------------- src/backend/lib/dshash.c | 163 ++++++++++++++++++++++++++++++++++++++- src/include/lib/dshash.h | 23 ++++++ src/tools/pgindent/typedefs.list | 1 + 3 files changed, 186 insertions(+), 1 deletion(-)
