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dbms: Server: add small performance improvement. [#METR-14099]

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This commit is contained in:
Alexey Arno 2014-12-26 13:35:03 +03:00
parent 95d4aa1de5
commit b288819e2e
1 changed files with 7 additions and 7 deletions
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14
dbms/src/Interpreters/InterpreterSelectQuery.cpp
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@ -34,7 +34,13 @@ namespace DB
{
void InterpreterSelectQuery::init(BlockInputStreamPtr input, const Names & required_column_names, const NamesAndTypesList & table_column_names)
{
{
ProfileEvents::increment(ProfileEvents::SelectQuery);
if (settings.limits.max_subquery_depth && subquery_depth > settings.limits.max_subquery_depth)
throw Exception("Too deep subqueries. Maximum: " + toString(settings.limits.max_subquery_depth),
ErrorCodes::TOO_DEEP_SUBQUERIES);
if (isFirstSelectInsideUnionAll() && hasAsterisk())
{
basicInit(input, table_column_names);
@ -63,12 +69,6 @@ void InterpreterSelectQuery::init(BlockInputStreamPtr input, const Names & requi
void InterpreterSelectQuery::basicInit(BlockInputStreamPtr input_, const NamesAndTypesList & table_column_names)
{
ProfileEvents::increment(ProfileEvents::SelectQuery);
if (settings.limits.max_subquery_depth && subquery_depth > settings.limits.max_subquery_depth)
throw Exception("Too deep subqueries. Maximum: " + toString(settings.limits.max_subquery_depth),
ErrorCodes::TOO_DEEP_SUBQUERIES);
if (query.table && typeid_cast<ASTSelectQuery *>(&*query.table))
{
if (table_column_names.empty())