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Remove extra code

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This commit is contained in:
Frank Chen 2022-07-08 18:56:07 +08:00
parent 6ae2504e57
commit 9711559391
2 changed files with 0 additions and 50 deletions
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48
src/Interpreters/Context.cpp
View File

@ -3425,52 +3425,4 @@ WriteSettings Context::getWriteSettings() const
return res;
}
OpenTelemetryThreadTraceContextScopePtr Context::startTracing(const std::string& name)
{
OpenTelemetryThreadTraceContextScopePtr trace_context;
if (this->client_info.client_trace_context.trace_id != UUID())
{
// Use the OpenTelemetry trace context we received from the client, and
// initialize the tracing context for this query on current thread
return std::make_unique<OpenTelemetryThreadTraceContextScope>(name,
this->client_info.client_trace_context,
this->getOpenTelemetrySpanLog());
}
// start the trace ourselves, with some configurable probability.
std::bernoulli_distribution should_start_trace{settings.opentelemetry_start_trace_probability};
if (!should_start_trace(thread_local_rng))
{
return trace_context;
}
/// Generate random UUID, but using lower quality RNG,
/// because Poco::UUIDGenerator::generateRandom method is using /dev/random, that is very expensive.
/// NOTE: Actually we don't need to use UUIDs for query identifiers.
/// We could use any suitable string instead.
union
{
char bytes[16];
struct
{
UInt64 a;
UInt64 b;
} words;
UUID uuid{};
} random;
random.words.a = thread_local_rng(); //-V656
random.words.b = thread_local_rng(); //-V656
OpenTelemetryTraceContext query_trace_context;
query_trace_context.trace_id = random.uuid;
query_trace_context.span_id = 0;
// Mark this trace as sampled in the flags.
query_trace_context.trace_flags = 1;
return std::make_unique<OpenTelemetryThreadTraceContextScope>(name,
query_trace_context,
this->getOpenTelemetrySpanLog());
}
}

2
src/Interpreters/Context.h
View File

@ -550,8 +550,6 @@ public:
const String & projection_name = {},
const String & view_name = {});
OpenTelemetryThreadTraceContextScopePtr startTracing(const std::string& name);
/// Supported factories for records in query_log
enum class QueryLogFactories
{