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mdbx: minor fix handling MDBX_SET_LOWERBOUND to avoid MDBX_BAD_VALSIZE.

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Related to https://github.com/erthink/libmdbx/issues/248#issuecomment-986542620.
This commit is contained in:
Leonid Yuriev 2021-12-07 00:14:22 +03:00
parent a899056fd1
commit 839da86cac
1 changed files with 6 additions and 1 deletions
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7
src/core.c
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@ -14517,7 +14517,12 @@ int mdbx_cursor_get(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data,
rc = csr.err; rc = csr.err;
if (rc == MDBX_SUCCESS && csr.exact && mc->mc_xcursor) { if (rc == MDBX_SUCCESS && csr.exact && mc->mc_xcursor) {
mc->mc_flags &= ~C_DEL; mc->mc_flags &= ~C_DEL;
if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { csr.exact = false;
if (!save_data.iov_base && (mc->mc_db->md_flags & MDBX_DUPFIXED)) {
/* Avoiding search nested dupfixed hive if no data provided.
* This is changes the semantic of MDBX_SET_LOWERBOUND but avoid
* returning MDBX_BAD_VALSIZE. */
} else if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) {
*data = save_data; *data = save_data;
csr = mdbx_cursor_set(&mc->mc_xcursor->mx_cursor, data, NULL, csr = mdbx_cursor_set(&mc->mc_xcursor->mx_cursor, data, NULL,
MDBX_SET_RANGE); MDBX_SET_RANGE);