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This commit is contained in:
Alexey Milovidov 2016-03-03 23:29:52 +03:00
parent dada8321e8
commit a8f423a74c
1 changed files with 4 additions and 0 deletions
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4
dbms/src/Storages/MergeTree/MergeTreeDataSelectExecutor.cpp
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@ -26,6 +26,7 @@ namespace DB
namespace ErrorCodes
{
extern const int INDEX_NOT_USED;
extern const int SAMPLING_NOT_SUPPORTED;
}
@ -265,6 +266,9 @@ BlockInputStreams MergeTreeDataSelectExecutor::read(
if (use_sampling)
{
if (!data.sampling_expression)
throw Exception("Illegal SAMPLE: table doesn't support sampling", ErrorCodes::SAMPLING_NOT_SUPPORTED);
RelativeSize size_of_universum = 0;
DataTypePtr type = data.getPrimaryExpression()->getSampleBlock().getByName(data.sampling_expression->getColumnName()).type;