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EXPLAIN tests

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This commit is contained in:
Igor Nikonov 2022-08-08 18:57:18 +00:00
parent 15bdeba074
commit 1439664df6
4 changed files with 69 additions and 4 deletions
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2
src/Processors/QueryPlan/ExpressionStep.cpp
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@ -1,4 +1,3 @@
#include <algorithm>
#include <Processors/QueryPlan/ExpressionStep.h>
#include <Processors/Transforms/ExpressionTransform.h>
#include <QueryPipeline/QueryPipelineBuilder.h>
@ -7,7 +6,6 @@
#include <IO/Operators.h>
#include <Interpreters/JoinSwitcher.h>
#include <Common/JSONBuilder.h>
#include "Core/SortDescription.h"
namespace DB
{

6
src/Processors/QueryPlan/SortingStep.cpp
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@ -235,8 +235,10 @@ void SortingStep::fullSort(QueryPipelineBuilder & pipeline, const SortDescriptio
void SortingStep::transformPipeline(QueryPipelineBuilder & pipeline, const BuildQueryPipelineSettings &)
{
/// we consider that a caller has more information what sorting to apply (depends on what constructor was used)
/// so we'll try to infer what sorting to use only in case of Full sorting
/// We consider that a caller has more information what type of sorting to apply.
/// The type depends on constructor used to create sorting step.
/// So we'll try to infer sorting to use only in case of Full sorting
if (type == Type::MergingSorted)
{
mergingSorted(pipeline, result_description, limit);

26
tests/queries/0_stateless/02377_optimize_sorting_for_input_stream_explain.reference Normal file
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@ -0,0 +1,26 @@
-- disable optimize_sorting_for_input_stream
-- PIPELINE: sorting order is NOT propagated from subquery -> full sort
MergeSortingTransform
LimitsCheckingTransform
PartialSortingTransform
-- enable optimize_sorting_for_input_stream
-- PIPELINE: sorting order is propagated from subquery -> merge sort
MergeSortingTransform
-- PLAN: ExpressionStep preserves sort mode
Sort Mode: Stream: a ASC
Sort Mode: Stream: a ASC
Sort Mode: Port: a ASC
Sort Mode: Port: a ASC
-- PLAN: ExpressionStep breaks sort mode
Sort Mode: Stream: plus(a, 1) ASC
Sort Mode: Stream: plus(a, 1) ASC
Sort Mode: None
Sort Mode: Chunk: a ASC
-- PLAN: FilterStep preserves sort mode
Sort Mode: Chunk: a ASC
Sort Mode: Chunk: a ASC
Sort Mode: Chunk: a ASC
-- PLAN: FilterStep breaks sort mode
Sort Mode: None
Sort Mode: None
Sort Mode: Chunk: a ASC

39
tests/queries/0_stateless/02377_optimize_sorting_for_input_stream_explain.sh Executable file
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@ -0,0 +1,39 @@
#!/usr/bin/env bash
CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
# shellcheck source=../shell_config.sh
. "$CURDIR"/../shell_config.sh
DISABLE_OPTIMIZATION="set optimize_sorting_for_input_stream=0;set max_threads=1"
ENABLE_OPTIMIZATION="set optimize_sorting_for_input_stream=1;set max_threads=1"
GREP_SORTING="grep 'PartialSortingTransform\|LimitsCheckingTransform\|MergeSortingTransform\|MergingSortedTransform'"
GREP_SORTMODE="grep 'Sort Mode'"
TRIM_LEADING_SPACES="sed -e 's/^[ \t]*//'"
FIND_SORTING="$GREP_SORTING | $TRIM_LEADING_SPACES"
FIND_SORTMODE="$GREP_SORTMODE | $TRIM_LEADING_SPACES"
$CLICKHOUSE_CLIENT -q "drop table if exists optimize_sorting sync"
$CLICKHOUSE_CLIENT -q "create table optimize_sorting (a int, b int, c int) engine=MergeTree() order by (a, b)"
$CLICKHOUSE_CLIENT -q "insert into optimize_sorting select number, number % 5, number % 2 from numbers(0,10)"
$CLICKHOUSE_CLIENT -q "insert into optimize_sorting select number, number % 5, number % 2 from numbers(10,10)"
$CLICKHOUSE_CLIENT -q "insert into optimize_sorting select number, number % 5, number % 2 from numbers(20,10)"
$CLICKHOUSE_CLIENT -q "select '-- disable optimize_sorting_for_input_stream'"
$CLICKHOUSE_CLIENT -q "select '-- PIPELINE: sorting order is NOT propagated from subquery -> full sort'"
$CLICKHOUSE_CLIENT -nq "$DISABLE_OPTIMIZATION;explain pipeline select a from (select a from optimize_sorting) order by a" | eval $FIND_SORTING
$CLICKHOUSE_CLIENT -q "select '-- enable optimize_sorting_for_input_stream'"
$CLICKHOUSE_CLIENT -q "select '-- PIPELINE: sorting order is propagated from subquery -> merge sort'"
$CLICKHOUSE_CLIENT -nq "$ENABLE_OPTIMIZATION;explain pipeline select a from (select a from optimize_sorting) order by a" | eval $FIND_SORTING
$CLICKHOUSE_CLIENT -q "select '-- PLAN: ExpressionStep preserves sort mode'"
$CLICKHOUSE_CLIENT -nq "EXPLAIN PLAN sortmode=1 SELECT a FROM optimize_sorting ORDER BY a" | eval $FIND_SORTMODE
$CLICKHOUSE_CLIENT -q "select '-- PLAN: ExpressionStep breaks sort mode'"
$CLICKHOUSE_CLIENT -nq "EXPLAIN PLAN sortmode=1 SELECT a+1 FROM optimize_sorting ORDER BY a+1" | eval $FIND_SORTMODE
$CLICKHOUSE_CLIENT -q "select '-- PLAN: FilterStep preserves sort mode'"
$CLICKHOUSE_CLIENT -nq "EXPLAIN PLAN sortmode=1 SELECT a FROM optimize_sorting WHERE a > 0" | eval $FIND_SORTMODE
$CLICKHOUSE_CLIENT -q "select '-- PLAN: FilterStep breaks sort mode'"
$CLICKHOUSE_CLIENT -nq "EXPLAIN PLAN sortmode=1 SELECT a > 0 FROM optimize_sorting WHERE a > 0" | eval $FIND_SORTMODE