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db_stress: fix run time error when prefix_size = -1 #5862

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db_stress: fix run time error when prefix_size = -1 #5862

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7 changes: 5 additions & 2 deletions tools/db_stress.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -4285,9 +4285,12 @@ class CfConsistencyStressTest : public StressTest {
const ReadOptions& readoptions,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) {
size_t prefix_to_use =
(FLAGS_prefix_size < 0) ? 7 : static_cast<size_t>(FLAGS_prefix_size);

std::string key_str = Key(rand_keys[0]);
Slice key = key_str;
Slice prefix = Slice(key.data(), FLAGS_prefix_size);
Slice prefix = Slice(key.data(), prefix_to_use);

std::string upper_bound;
Slice ub_slice;
Expand All @@ -4305,7 +4308,7 @@ class CfConsistencyStressTest : public StressTest {
iter->Next()) {
++count;
}
assert(count <= (static_cast<long>(1) << ((8 - FLAGS_prefix_size) * 8)));
assert(count <= (static_cast<long>(1) << ((8 - prefix_to_use) * 8)));
Status s = iter->status();
if (s.ok()) {
thread->stats.AddPrefixes(1, count);
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