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Fix mdb_load append option

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Use MDB_CURRENT to avoid seeking to new key when appending DUPs.
Reinit cursor on new batch, if appending DUPs.
This commit is contained in:
hyc
2018-05-08 06:14:39 +01:00
parent 9705032618
commit 18cd6837b6
2 changed files with 9 additions and 5 deletions
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10
external/db_drivers/liblmdb/mdb_load.c vendored
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@@ -304,7 +304,7 @@ int main(int argc, char *argv[])
MDB_cursor *mc;
MDB_dbi dbi;
char *envname;
int envflags = 0, putflags = 0;
int envflags = MDB_NOSYNC, putflags = 0;
int dohdr = 0, append = 0;
MDB_val prevk;
@@ -392,7 +392,6 @@ int main(int argc, char *argv[])
kbuf.mv_data = malloc(kbuf.mv_size * 2);
k0buf.mv_size = kbuf.mv_size;
k0buf.mv_data = (char *)kbuf.mv_data + kbuf.mv_size;
prevk.mv_size = 0;
prevk.mv_data = k0buf.mv_data;
while(!Eof) {
@@ -416,6 +415,7 @@ int main(int argc, char *argv[])
fprintf(stderr, "mdb_open failed, error %d %s\n", rc, mdb_strerror(rc));
goto txn_abort;
}
prevk.mv_size = 0;
if (append) {
mdb_set_compare(txn, dbi, greater);
if (flags & MDB_DUPSORT)
@@ -443,7 +443,7 @@ int main(int argc, char *argv[])
appflag = MDB_APPEND;
if (flags & MDB_DUPSORT) {
if (prevk.mv_size == key.mv_size && !memcmp(prevk.mv_data, key.mv_data, key.mv_size))
appflag = MDB_APPENDDUP;
appflag = MDB_CURRENT|MDB_APPENDDUP;
else {
memcpy(prevk.mv_data, key.mv_data, key.mv_size);
prevk.mv_size = key.mv_size;
@@ -477,6 +477,10 @@ int main(int argc, char *argv[])
fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
goto txn_abort;
}
if (appflag & MDB_APPENDDUP) {
MDB_val k, d;
mdb_cursor_get(mc, &k, &d, MDB_LAST);
}
batch = 0;
}
}