def tombs_c0_lc(kvdb: hse.Kvdb, kvs: hse.Kvs, cursor_sync: bool = False):
with kvdb.transaction() as t:
kvs.put(b"ab01", b"val-cn", txn=t)
with kvdb.transaction() as t:
kvs.put(b"ab02", b"val-lc", txn=t)
kvdb.sync()
with kvdb.transaction() as t:
kvs.delete(b"ab02", txn=t)
# Cursor
with kvdb.transaction() as t:
with kvs.cursor(filt=b"ab", txn=t) as c:
if cursor_sync:
kvdb.sync()
# Point Get
assert kvs.get(b"ab01", txn=t) == b"val-cn"
assert kvs.get(b"ab02", txn=t) == None
# Probe
cnt, *kv = kvs.prefix_probe(b"ab0", txn=t)
assert cnt == hse.KvsPfxProbeCnt.ONE
assert kv == [b"ab01", b"val-cn"]
# Read all keys
assert c.read() == (b"ab01", b"val-cn")
assert c.read() == (None, None) and c.eof == True
# Seek, read
c.seek(b"ab00")
assert c.read() == (b"ab01", b"val-cn")
c.seek(b"ab01")
assert c.read() == (b"ab01", b"val-cn")
c.seek(b"ab02")
assert c.read() == (None, None) and c.eof == True
# Read, update, read
c.seek(b"ab01")
##c.update()
assert c.read() == (b"ab01", b"val-cn")
##c.update()
assert c.read() == (None, None) and c.eof == True
# Seek, update, read
c.seek(b"ab01")
##c.update()
assert c.read() == (b"ab01", b"val-cn")
c.seek(b"ab02")
##c.update()
assert c.read() == (None, None) and c.eof == True
def tombs_lc_cn(kvdb: hse.Kvdb, kvs: hse.Kvs, cursor_sync: bool = False):
with kvdb.transaction() as t:
kvs.put(b"ab01", b"val-cn", txn=t)
with kvdb.transaction() as t:
kvs.delete(b"ab01", txn=t)
kvdb.sync()
with kvdb.transaction() as t:
kvs.put(b"ab02", b"val-c0", txn=t)
# Cursor
with kvs.cursor(filt=b"ab") as c:
if cursor_sync:
kvdb.sync()
# Point Get
assert kvs.get(b"ab01")[0] == None
assert kvs.get(b"ab02")[0] == b"val-c0"
# Probe
cnt, k, _, v, _ = kvs.prefix_probe(b"ab0")
assert cnt == hse.KvsPfxProbeCnt.ONE
assert (k, v) == (b"ab02", b"val-c0")
# Read all keys
assert c.read() == (b"ab02", b"val-c0")
assert c.read() == (None, None) and c.eof == True
# Seek, read
c.seek(b"ab01")
assert c.read() == (b"ab02", b"val-c0")
c.seek(b"ab02")
assert c.read() == (b"ab02", b"val-c0")
# Read, update, read
c.seek(b"ab01")
c.update_view()
assert c.read() == (b"ab02", b"val-c0")
c.update_view()
assert c.read() == (None, None) and c.eof == True
# Seek, update, read
c.seek(b"ab01")
c.update_view()
assert c.read() == (b"ab02", b"val-c0")
c.seek(b"ab02")
c.update_view()
assert c.read() == (b"ab02", b"val-c0")
def tombs_c0_lc(kvdb: hse.Kvdb, kvs: hse.Kvs, cursor_sync: bool = False):
with kvdb.transaction() as t:
kvs.put(b"ab01", b"val-cn", txn=t)
with kvdb.transaction() as t:
kvs.put(b"ab02", b"val-lc", txn=t)
kvdb.sync()
with kvdb.transaction() as t:
kvs.delete(b"ab02", txn=t)
# Cursor
with kvs.cursor(filt=b"ab", flags=hse.CursorFlag.REVERSE) as c:
if cursor_sync:
kvdb.sync()
# Read all keys
assert c.read() == (b"ab01", b"val-cn")
assert c.read() == (None, None) and c.eof == True
# Seek, read
c.seek(b"ab02")
assert c.read() == (b"ab01", b"val-cn")
c.seek(b"ab01")
assert c.read() == (b"ab01", b"val-cn")
c.seek(b"ab00")
assert c.read() == (None, None) and c.eof == True
# Read, update, read
c.seek(b"ab01")
c.update_view()
assert c.read() == (b"ab01", b"val-cn")
c.update_view()
assert c.read() == (None, None) and c.eof == True
# Seek, update, read
c.seek(b"ab01")
c.update_view()
assert c.read() == (b"ab01", b"val-cn")
c.seek(b"ab00")
c.update_view()
assert c.read() == (None, None) and c.eof == True
