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mdbx: add mdbx_cursor_get_batch().

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Resolve https://github.com/erthink/libmdbx/issues/236
This commit is contained in:
Leonid Yuriev
2021-12-11 02:56:19 +03:00
parent 32e495021f
commit 6f2c1e52ad
5 changed files with 230 additions and 3 deletions
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66
test/test.cc
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@@ -1192,3 +1192,69 @@ bool testcase::speculum_verify() {
mdbx_cursor_close(cursor);
return rc;
}
bool testcase::check_batch_get() {
char dump_key[128], dump_value[128];
char dump_key_batch[128], dump_value_batch[128];
MDBX_cursor *cursor;
int err = mdbx_cursor_open(txn_guard.get(), dbi, &cursor);
if (err != MDBX_SUCCESS)
failure_perror("mdbx_cursor_open()", err);
MDBX_cursor *batch_cursor;
err = mdbx_cursor_open(txn_guard.get(), dbi, &batch_cursor);
if (err != MDBX_SUCCESS)
failure_perror("mdbx_cursor_open()", err);
MDBX_val pairs[42];
size_t count = 0xDeadBeef;
err = mdbx_cursor_get_batch(batch_cursor, &count, pairs, ARRAY_LENGTH(pairs),
MDBX_FIRST);
bool rc = true;
size_t i, n = 0;
while (err == MDBX_SUCCESS) {
for (i = 0; i < count; i += 2) {
mdbx::slice key, value;
int err2 = mdbx_cursor_get(cursor, &key, &value, MDBX_NEXT);
if (err2 != MDBX_SUCCESS)
failure_perror("mdbx_cursor_open()", err2);
if (key != pairs[i] || value != pairs[i + 1]) {
log_error(
"batch-get pair mismatch %zu/%zu: sequential{%s, %s} != "
"batch{%s, %s}",
n + i / 2, i, mdbx_dump_val(&key, dump_key, sizeof(dump_key)),
mdbx_dump_val(&value, dump_value, sizeof(dump_value)),
mdbx_dump_val(&pairs[i], dump_key_batch, sizeof(dump_key_batch)),
mdbx_dump_val(&pairs[i + 1], dump_value_batch,
sizeof(dump_value_batch)));
rc = false;
}
}
n += i / 2;
err = mdbx_cursor_get_batch(batch_cursor, &count, pairs,
ARRAY_LENGTH(pairs), MDBX_NEXT);
}
if (err != MDBX_NOTFOUND)
failure_perror("mdbx_cursor_get_batch()", err);
err = mdbx_cursor_eof(batch_cursor);
if (err != MDBX_RESULT_TRUE) {
log_error("batch-get %s cursor not-eof %d", "batch", err);
rc = false;
}
err = mdbx_cursor_on_last(batch_cursor);
if (err != MDBX_RESULT_TRUE) {
log_error("batch-get %s cursor not-on-last %d", "batch", err);
rc = false;
}
err = mdbx_cursor_on_last(cursor);
if (err != MDBX_RESULT_TRUE) {
log_error("batch-get %s cursor not-on-last %d", "checked", err);
rc = false;
}
mdbx_cursor_close(cursor);
mdbx_cursor_close(batch_cursor);
return rc;
}