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fix prewhere in case when filter is shrinked by optimization and exists missing default in part

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This commit is contained in:
Anton Popov 2020-03-12 03:39:48 +03:00
parent bbd9eb3d3e
commit 32f82629d8
4 changed files with 14 additions and 3 deletions
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4
dbms/src/Storages/MergeTree/MergeTreeRangeReader.cpp
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@ -631,7 +631,7 @@ MergeTreeRangeReader::ReadResult MergeTreeRangeReader::read(size_t max_rows, Mar
if (read_result.need_filter)
{
auto old_columns = block_before_prewhere.getColumns();
filterColumns(old_columns, read_result.getFilter()->getData());
filterColumns(old_columns, read_result.getFilterOriginal()->getData());
block_before_prewhere.setColumns(std::move(old_columns));
}
@ -875,7 +875,7 @@ void MergeTreeRangeReader::executePrewhereActionsAndFilterColumns(ReadResult & r
if (result.getFilter())
{
/// filter might be shrinked while columns not
auto result_filter = result.getFilterOriginal() ? result.getFilterOriginal() : result.getFilter();
auto result_filter = result.getFilterOriginal();
filterColumns(result.columns, result_filter->getData());
result.need_filter = true;

2
dbms/src/Storages/MergeTree/MergeTreeRangeReader.h
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@ -144,7 +144,7 @@ public:
/// The number of bytes read from disk.
size_t numBytesRead() const { return num_bytes_read; }
/// Filter you need to apply to newly-read columns in order to add them to block.
const ColumnUInt8 * getFilterOriginal() const { return filter_original; }
const ColumnUInt8 * getFilterOriginal() const { return filter_original ? filter_original : filter; }
const ColumnUInt8 * getFilter() const { return filter; }
ColumnPtr & getFilterHolder() { return filter_holder; }

1
dbms/tests/queries/0_stateless/01097_one_more_range_reader_test.reference Normal file
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@ -0,0 +1 @@
foo

10
dbms/tests/queries/0_stateless/01097_one_more_range_reader_test.sql Normal file
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@ -0,0 +1,10 @@
drop table if exists t;
create table t (id UInt32, a Int) engine = MergeTree order by id;
insert into t values (1, 0) (2, 1) (3, 0) (4, 0) (5, 0);
alter table t add column s String default 'foo';
select s from t prewhere a = 1 where rand() % 2 = 0 limit 1;
drop table t;