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Merge pull request #63004 from Algunenano/remove_optimize_monotonous_functions_in_order_by

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Remove optimize_monotonous_functions_in_order_by setting
This commit is contained in:
Raúl Marín 2024-04-26 12:13:50 +00:00 committed by GitHub
commit 25d7f24f0f
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GPG Key ID: B5690EEEBB952194
15 changed files with 3 additions and 490 deletions
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1
src/Analyzer/QueryTreePassManager.cpp
View File

@ -165,7 +165,6 @@ private:
/** ClickHouse query tree pass manager.
*
* TODO: Support setting optimize_monotonous_functions_in_order_by.
* TODO: Add optimizations based on function semantics. Example: SELECT * FROM test_table WHERE id != id. (id is not nullable column).
*/

2
src/Core/Settings.h
View File

@ -603,7 +603,6 @@ class IColumn;
M(Bool, optimize_if_chain_to_multiif, false, "Replace if(cond1, then1, if(cond2, ...)) chains to multiIf. Currently it's not beneficial for numeric types.", 0) \
M(Bool, optimize_multiif_to_if, true, "Replace 'multiIf' with only one condition to 'if'.", 0) \
M(Bool, optimize_if_transform_strings_to_enum, false, "Replaces string-type arguments in If and Transform to enum. Disabled by default cause it could make inconsistent change in distributed query that would lead to its fail.", 0) \
M(Bool, optimize_monotonous_functions_in_order_by, false, "Replace monotonous function with its argument in ORDER BY", 0) \
M(Bool, optimize_functions_to_subcolumns, false, "Transform functions to subcolumns, if possible, to reduce amount of read data. E.g. 'length(arr)' -> 'arr.size0', 'col IS NULL' -> 'col.null' ", 0) \
M(Bool, optimize_using_constraints, false, "Use constraints for query optimization", 0) \
M(Bool, optimize_substitute_columns, false, "Use constraints for column substitution", 0) \
@ -977,6 +976,7 @@ class IColumn;
MAKE_OBSOLETE(M, Bool, allow_experimental_undrop_table_query, true) \
MAKE_OBSOLETE(M, Bool, allow_experimental_s3queue, true) \
MAKE_OBSOLETE(M, Bool, query_plan_optimize_primary_key, true) \
MAKE_OBSOLETE(M, Bool, optimize_monotonous_functions_in_order_by, false) \
/** The section above is for obsolete settings. Do not add anything there. */

90
src/Interpreters/TreeOptimizer.cpp
View File

@ -368,92 +368,6 @@ std::unordered_set<String> getDistinctNames(const ASTSelectQuery & select)
return names;
}
/// Replace monotonous functions in ORDER BY if they don't participate in GROUP BY expression,
/// has a single argument and not an aggregate functions.
void optimizeMonotonousFunctionsInOrderBy(ASTSelectQuery * select_query, ContextPtr context,
const TablesWithColumns & tables_with_columns,
const TreeRewriterResult & result)
{
auto order_by = select_query->orderBy();
if (!order_by)
return;
/// Do not apply optimization for Distributed and Merge storages,
/// because we can't get the sorting key of their underlying tables
/// and we can break the matching of the sorting key for `read_in_order`
/// optimization by removing monotonous functions from the prefix of key.
if (result.is_remote_storage || (result.storage && result.storage->getName() == "Merge"))
return;
for (const auto & child : order_by->children)
{
auto * order_by_element = child->as<ASTOrderByElement>();
if (!order_by_element || order_by_element->children.empty())
throw Exception(ErrorCodes::UNKNOWN_TYPE_OF_AST_NODE, "Bad ORDER BY expression AST");
if (order_by_element->with_fill)
return;
}
std::unordered_set<String> group_by_hashes;
if (auto group_by = select_query->groupBy())
{
if (select_query->group_by_with_grouping_sets)
{
for (auto & set : group_by->children)
{
for (auto & elem : set->children)
{
const auto hash = elem->getTreeHash(/*ignore_aliases=*/ true);
const auto key = toString(hash);
group_by_hashes.insert(key);
}
}
}
else
{
for (auto & elem : group_by->children)
{
const auto hash = elem->getTreeHash(/*ignore_aliases=*/ true);
const auto key = toString(hash);
group_by_hashes.insert(key);
}
}
}
auto sorting_key_columns = result.storage_snapshot ? result.storage_snapshot->metadata->getSortingKeyColumns() : Names{};
bool is_sorting_key_prefix = true;
for (size_t i = 0; i < order_by->children.size(); ++i)
{
auto * order_by_element = order_by->children[i]->as<ASTOrderByElement>();
auto & ast_func = order_by_element->children[0];
if (!ast_func->as<ASTFunction>())
continue;
if (i >= sorting_key_columns.size() || ast_func->getColumnName() != sorting_key_columns[i])
is_sorting_key_prefix = false;
/// If order by expression matches the sorting key, do not remove
/// functions to allow execute reading in order of key.
if (is_sorting_key_prefix)
continue;
MonotonicityCheckVisitor::Data data{tables_with_columns, context, group_by_hashes};
MonotonicityCheckVisitor(data).visit(ast_func);
if (!data.isRejected())
{
ast_func = data.identifier->clone();
ast_func->setAlias("");
if (!data.monotonicity.is_positive)
order_by_element->direction *= -1;
}
}
}
/// If ORDER BY has argument x followed by f(x) transforms it to ORDER BY x.
/// Optimize ORDER BY x, y, f(x), g(x, y), f(h(x)), t(f(x), g(x)) into ORDER BY x, y
/// in case if f(), g(), h(), t() are deterministic (in scope of query).
@ -789,10 +703,6 @@ void TreeOptimizer::apply(ASTPtr & query, TreeRewriterResult & result,
if (settings.optimize_redundant_functions_in_order_by)
optimizeRedundantFunctionsInOrderBy(select_query, context);
/// Replace monotonous functions with its argument
if (settings.optimize_monotonous_functions_in_order_by)
optimizeMonotonousFunctionsInOrderBy(select_query, context, tables_with_columns, result);
/// Remove duplicate items from ORDER BY.
/// Execute it after all order by optimizations,
/// because they can produce duplicated columns.

162
tests/queries/0_stateless/01321_monotonous_functions_in_order_by.reference
View File

@ -1,162 +0,0 @@
0
1
2
0
1
2
0
1
2
2
1
0
0
1
2
0
1
2
0
1
2
2
1
0
2
1
0
2
1
0
0
1
2
2
1
0
2
1
0
SELECT number
FROM numbers(3)
ORDER BY number ASC
SELECT number
FROM numbers(3)
ORDER BY abs(toFloat32(number)) ASC
SELECT number
FROM numbers(3)
ORDER BY toFloat32(abs(number)) ASC
SELECT number
FROM numbers(3)
ORDER BY number DESC
SELECT number
FROM numbers(3)
ORDER BY exp(number) ASC
SELECT roundToExp2(number) AS x
FROM numbers(3)
ORDER BY number ASC
SELECT number AS x
FROM numbers(3)
ORDER BY number ASC
SELECT number
FROM numbers(3)
ORDER BY number DESC
SELECT number
FROM numbers(3)
ORDER BY abs(toFloat32(number)) DESC
SELECT number
FROM numbers(3)
ORDER BY toFloat32(abs(number)) DESC
SELECT number
FROM numbers(3)
ORDER BY number ASC
SELECT number
FROM numbers(3)
ORDER BY exp(number) DESC
SELECT roundToExp2(number) AS x
FROM numbers(3)
ORDER BY number DESC
0
1
2
0
1
2
0
1
2
2
1
0
0
1
2
0
1
2
0
1
2
2
1
0
2
1
0
2
1
0
0
1
2
2
1
0
2
1
0
SELECT number
FROM numbers(3)
ORDER BY toFloat32(toFloat64(number)) ASC
SELECT number
FROM numbers(3)
ORDER BY abs(toFloat32(number)) ASC
SELECT number
FROM numbers(3)
ORDER BY toFloat32(abs(number)) ASC
SELECT number
FROM numbers(3)
ORDER BY -number ASC
SELECT number
FROM numbers(3)
ORDER BY exp(number) ASC
SELECT roundToExp2(number) AS x
FROM numbers(3)
ORDER BY
x ASC,
toFloat32(x) ASC
SELECT number AS x
FROM numbers(3)
ORDER BY
toFloat32(x) AS k ASC,
toFloat64(k) ASC
SELECT number
FROM numbers(3)
ORDER BY toFloat32(toFloat64(number)) DESC
SELECT number
FROM numbers(3)
ORDER BY abs(toFloat32(number)) DESC
SELECT number
FROM numbers(3)
ORDER BY toFloat32(abs(number)) DESC
SELECT number
FROM numbers(3)
ORDER BY -number DESC
SELECT number
FROM numbers(3)
ORDER BY exp(number) DESC
SELECT roundToExp2(number) AS x
FROM numbers(3)
ORDER BY
x DESC,
toFloat32(x) DESC

58
tests/queries/0_stateless/01321_monotonous_functions_in_order_by.sql
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@ -1,58 +0,0 @@
SET optimize_monotonous_functions_in_order_by = 1;
SELECT number FROM numbers(3) ORDER BY toFloat32(toFloat64(number));
SELECT number FROM numbers(3) ORDER BY abs(toFloat32(number));
SELECT number FROM numbers(3) ORDER BY toFloat32(abs(number));
SELECT number FROM numbers(3) ORDER BY -number;
SELECT number FROM numbers(3) ORDER BY exp(number);
SELECT roundToExp2(number) AS x FROM numbers(3) ORDER BY x, toFloat32(x);
SELECT number AS x FROM numbers(3) ORDER BY toFloat32(x) as k, toFloat64(k);
SELECT number FROM numbers(3) ORDER BY toFloat32(toFloat64(number)) DESC;
SELECT number FROM numbers(3) ORDER BY abs(toFloat32(number)) DESC;
SELECT number FROM numbers(3) ORDER BY toFloat32(abs(number)) DESC;
SELECT number FROM numbers(3) ORDER BY -number DESC;
SELECT number FROM numbers(3) ORDER BY exp(number) DESC;
SELECT roundToExp2(number) AS x FROM numbers(3) ORDER BY x DESC, toFloat32(x) DESC;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY toFloat32(toFloat64(number));
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY abs(toFloat32(number));
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY toFloat32(abs(number));
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY -number;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY exp(number);
EXPLAIN SYNTAX SELECT roundToExp2(number) AS x FROM numbers(3) ORDER BY x, toFloat32(x);
EXPLAIN SYNTAX SELECT number AS x FROM numbers(3) ORDER BY toFloat32(x) as k, toFloat64(k);
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY toFloat32(toFloat64(number)) DESC;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY abs(toFloat32(number)) DESC;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY toFloat32(abs(number)) DESC;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY -number DESC;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY exp(number) DESC;
EXPLAIN SYNTAX SELECT roundToExp2(number) AS x FROM numbers(3) ORDER BY x DESC, toFloat32(x) DESC;
SET optimize_monotonous_functions_in_order_by = 0;
SELECT number FROM numbers(3) ORDER BY toFloat32(toFloat64(number));
SELECT number FROM numbers(3) ORDER BY abs(toFloat32(number));
SELECT number FROM numbers(3) ORDER BY toFloat32(abs(number));
SELECT number FROM numbers(3) ORDER BY -number;
SELECT number FROM numbers(3) ORDER BY exp(number);
SELECT roundToExp2(number) AS x FROM numbers(3) ORDER BY x, toFloat32(x);
SELECT number AS x FROM numbers(3) ORDER BY toFloat32(x) as k, toFloat64(k);
SELECT number FROM numbers(3) ORDER BY toFloat32(toFloat64(number)) DESC;
SELECT number FROM numbers(3) ORDER BY abs(toFloat32(number)) DESC;
SELECT number FROM numbers(3) ORDER BY toFloat32(abs(number)) DESC;
SELECT number FROM numbers(3) ORDER BY -number DESC;
SELECT number FROM numbers(3) ORDER BY exp(number) DESC;
SELECT roundToExp2(number) AS x FROM numbers(3) ORDER BY x DESC, toFloat32(x) DESC;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY toFloat32(toFloat64(number));
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY abs(toFloat32(number));
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY toFloat32(abs(number));
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY -number;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY exp(number);
EXPLAIN SYNTAX SELECT roundToExp2(number) AS x FROM numbers(3) ORDER BY x, toFloat32(x);
EXPLAIN SYNTAX SELECT number AS x FROM numbers(3) ORDER BY toFloat32(x) as k, toFloat64(k);
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY toFloat32(toFloat64(number)) DESC;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY abs(toFloat32(number)) DESC;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY toFloat32(abs(number)) DESC;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY -number DESC;
EXPLAIN SYNTAX SELECT number FROM numbers(3) ORDER BY exp(number) DESC;
EXPLAIN SYNTAX SELECT roundToExp2(number) AS x FROM numbers(3) ORDER BY x DESC, toFloat32(x) DESC;
-- TODO: exp() should be monotonous function

32
tests/queries/0_stateless/01322_monotonous_order_by_with_different_variables.reference
View File

@ -1,32 +0,0 @@
1 4 3
1 3 3
2 5 4
2 2 4
1 3 3
1 4 3
2 2 4
2 5 4
2
1
2
1 3 3
1 4 3
2 2 4
2 5 4
2
1 4 3
1 3 3
2 5 4
2 2 4
1 3 3
1 4 3
2 2 4
2 5 4
2
1
2
1 3 3
1 4 3
2 2 4
2 5 4
2

21
tests/queries/0_stateless/01322_monotonous_order_by_with_different_variables.sql
View File

@ -1,21 +0,0 @@
DROP TABLE IF EXISTS test;
CREATE TABLE test (x Int8, y Int8, z Int8) ENGINE = MergeTree ORDER BY tuple();
INSERT INTO test VALUES (1, 3, 3), (1, 4, 3), (2, 5, 4), (2, 2, 4);
SET optimize_monotonous_functions_in_order_by = 1;
SELECT * FROM test ORDER BY toFloat32(x), -y, -z DESC;
SELECT * FROM test ORDER BY toFloat32(x), -(-y), -z DESC;
SELECT max(x) as k FROM test ORDER BY k;
SELECT roundToExp2(x) as k FROM test GROUP BY k ORDER BY k;
SELECT roundToExp2(x) as k, y, z FROM test WHERE k >= 1 ORDER BY k, y, z;
SELECT max(x) as k FROM test HAVING k > 0 ORDER BY k;
SET optimize_monotonous_functions_in_order_by = 0;
SELECT * FROM test ORDER BY toFloat32(x), -y, -z DESC;
SELECT * FROM test ORDER BY toFloat32(x), -(-y), -z DESC;
SELECT max(x) as k FROM test ORDER BY k;
SELECT roundToExp2(x) as k From test GROUP BY k ORDER BY k;
SELECT roundToExp2(x) as k, y, z FROM test WHERE k >= 1 ORDER BY k, y, z;
SELECT max(x) as k FROM test HAVING k > 0 ORDER BY k;
DROP TABLE test;

41
tests/queries/0_stateless/01562_optimize_monotonous_functions_in_order_by.reference
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@ -1,41 +0,0 @@
SELECT
timestamp,
key
FROM test_order_by
ORDER BY timestamp ASC
LIMIT 10
Expression (Project names)
Limit (preliminary LIMIT (without OFFSET))
Sorting (Sorting for ORDER BY)
Expression ((Before ORDER BY + (Projection + Change column names to column identifiers)))
ReadFromMergeTree (default.test_order_by)
SELECT
timestamp,
key
FROM test_order_by
ORDER BY toDate(timestamp) ASC
LIMIT 10
Expression (Project names)
Limit (preliminary LIMIT (without OFFSET))
Sorting (Sorting for ORDER BY)
Expression ((Before ORDER BY + (Projection + Change column names to column identifiers)))
ReadFromMergeTree (default.test_order_by)
SELECT
timestamp,
key
FROM test_order_by
ORDER BY
toDate(timestamp) ASC,
timestamp ASC
LIMIT 10
Expression (Project names)
Limit (preliminary LIMIT (without OFFSET))
Sorting (Sorting for ORDER BY)
Expression ((Before ORDER BY + (Projection + Change column names to column identifiers)))
ReadFromMergeTree (default.test_order_by)
SELECT
timestamp,
key
FROM test_order_by
ORDER BY timestamp ASC
LIMIT 10

28
tests/queries/0_stateless/01562_optimize_monotonous_functions_in_order_by.sql
View File

@ -1,28 +0,0 @@
SET allow_experimental_analyzer = 1;
SET optimize_monotonous_functions_in_order_by = 1;
SET optimize_read_in_order = 1;
DROP TABLE IF EXISTS test_order_by;
CREATE TABLE test_order_by (timestamp DateTime, key UInt32) ENGINE=MergeTree() ORDER BY (toDate(timestamp), key);
INSERT INTO test_order_by SELECT now() + toIntervalSecond(number), number % 4 FROM numbers(10000);
OPTIMIZE TABLE test_order_by FINAL;
EXPLAIN SYNTAX SELECT * FROM test_order_by ORDER BY timestamp LIMIT 10;
EXPLAIN PLAN SELECT * FROM test_order_by ORDER BY timestamp LIMIT 10;
EXPLAIN SYNTAX SELECT * FROM test_order_by ORDER BY toDate(timestamp) LIMIT 10;
EXPLAIN PLAN SELECT * FROM test_order_by ORDER BY toDate(timestamp) LIMIT 10;
EXPLAIN SYNTAX SELECT * FROM test_order_by ORDER BY toDate(timestamp), timestamp LIMIT 10;
EXPLAIN PLAN SELECT * FROM test_order_by ORDER BY toDate(timestamp), timestamp LIMIT 10;
DROP TABLE IF EXISTS test_order_by;
CREATE TABLE test_order_by (timestamp DateTime, key UInt32) ENGINE=MergeTree() ORDER BY tuple();
INSERT INTO test_order_by SELECT now() + toIntervalSecond(number), number % 4 FROM numbers(10000);
OPTIMIZE TABLE test_order_by FINAL;
EXPLAIN SYNTAX SELECT * FROM test_order_by ORDER BY toDate(timestamp), timestamp LIMIT 10;
DROP TABLE IF EXISTS test_order_by;

2
tests/queries/0_stateless/01576_alias_column_rewrite.sql
View File

@ -17,7 +17,7 @@ INSERT INTO test_table(timestamp, value) SELECT toDateTime('2020-01-01 12:00:00'
INSERT INTO test_table(timestamp, value) SELECT toDateTime('2020-01-02 12:00:00'), 1 FROM numbers(10);
INSERT INTO test_table(timestamp, value) SELECT toDateTime('2020-01-03 12:00:00'), 1 FROM numbers(10);
set optimize_respect_aliases = 1, optimize_monotonous_functions_in_order_by = 1;
set optimize_respect_aliases = 1;
SELECT 'test-partition-prune';
SELECT COUNT() = 10 FROM test_table WHERE day = '2020-01-01' SETTINGS max_rows_to_read = 10;

21
tests/queries/0_stateless/02147_order_by_optimizations.reference
View File

@ -1,21 +0,0 @@
SELECT
date,
v
FROM t_02147
ORDER BY
toStartOfHour(date) ASC,
v ASC
SELECT
date,
v
FROM t_02147_dist
ORDER BY
toStartOfHour(date) ASC,
v ASC
SELECT
date,
v
FROM t_02147_merge
ORDER BY
toStartOfHour(date) ASC,
v ASC

19
tests/queries/0_stateless/02147_order_by_optimizations.sql
View File

@ -1,19 +0,0 @@
DROP TABLE IF EXISTS t_02147;
DROP TABLE IF EXISTS t_02147_dist;
DROP TABLE IF EXISTS t_02147_merge;
CREATE TABLE t_02147 (date DateTime, v UInt32)
ENGINE = MergeTree ORDER BY toStartOfHour(date);
CREATE TABLE t_02147_dist AS t_02147 ENGINE = Distributed(test_shard_localhost, currentDatabase(), t_02147);
CREATE TABLE t_02147_merge AS t_02147 ENGINE = Merge(currentDatabase(), 't_02147');
SET optimize_monotonous_functions_in_order_by = 1;
EXPLAIN SYNTAX SELECT * FROM t_02147 ORDER BY toStartOfHour(date), v;
EXPLAIN SYNTAX SELECT * FROM t_02147_dist ORDER BY toStartOfHour(date), v;
EXPLAIN SYNTAX SELECT * FROM t_02147_merge ORDER BY toStartOfHour(date), v;
drop table t_02147;
CREATE TABLE t_02147 (date DateTime, v UInt32) ENGINE = MergeTree ORDER BY date;
select *, toString(t.v) as s from t_02147_merge as t order by date, s;

4
tests/queries/0_stateless/02315_optimize_monotonous_functions_in_order_by_remote.reference
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@ -1,4 +0,0 @@
0
0
0
0

10
tests/queries/0_stateless/02315_optimize_monotonous_functions_in_order_by_remote.sql
View File

@ -1,10 +0,0 @@
SET prefer_localhost_replica = 1;
SET optimize_monotonous_functions_in_order_by = 1;
SELECT *
FROM cluster(test_cluster_two_shards_localhost, system, one)
ORDER BY toDateTime(dummy);
SELECT *
FROM cluster(test_cluster_two_shards_localhost)
ORDER BY toDateTime(dummy)

2
tests/queries/0_stateless/02524_fuzz_and_fuss_2.sql
View File

@ -9,6 +9,6 @@ ENGINE = Memory;
INSERT INTO data_a_02187
SELECT *
FROM system.one
SETTINGS max_block_size = '1', min_insert_block_size_rows = '65536', min_insert_block_size_bytes = '0', max_insert_threads = '0', max_threads = '3', receive_timeout = '10', receive_data_timeout_ms = '10000', connections_with_failover_max_tries = '0', extremes = '1', use_uncompressed_cache = '0', optimize_move_to_prewhere = '1', optimize_move_to_prewhere_if_final = '0', replication_alter_partitions_sync = '2', totals_mode = 'before_having', allow_suspicious_low_cardinality_types = '1', compile_expressions = '1', min_count_to_compile_expression = '0', group_by_two_level_threshold = '100', distributed_aggregation_memory_efficient = '0', distributed_group_by_no_merge = '1', optimize_distributed_group_by_sharding_key = '1', optimize_skip_unused_shards = '1', optimize_skip_unused_shards_rewrite_in = '1', force_optimize_skip_unused_shards = '2', optimize_skip_unused_shards_nesting = '1', force_optimize_skip_unused_shards_nesting = '2', merge_tree_min_rows_for_concurrent_read = '10000', force_primary_key = '1', network_compression_method = 'ZSTD', network_zstd_compression_level = '7', log_queries = '0', log_queries_min_type = 'QUERY_FINISH', distributed_product_mode = 'local', insert_quorum = '2', insert_quorum_timeout = '0', insert_quorum_parallel = '0', select_sequential_consistency = '1', join_use_nulls = '1', any_join_distinct_right_table_keys = '1', preferred_max_column_in_block_size_bytes = '32', distributed_foreground_insert = '1', insert_allow_materialized_columns = '1', use_index_for_in_with_subqueries = '1', joined_subquery_requires_alias = '0', empty_result_for_aggregation_by_empty_set = '1', allow_suspicious_codecs = '1', query_profiler_real_time_period_ns = '0', query_profiler_cpu_time_period_ns = '0', opentelemetry_start_trace_probability = '1', max_rows_to_read = '1000000', read_overflow_mode = 'break', max_rows_to_group_by = '10', group_by_overflow_mode = 'any', max_rows_to_sort = '100', sort_overflow_mode = 'break', max_result_rows = '10', max_execution_time = '3', max_execution_speed = '1', max_bytes_in_join = '100', join_algorithm = 'partial_merge', max_memory_usage = '1099511627776', log_query_threads = '1', send_logs_level = 'fatal', enable_optimize_predicate_expression = '1', prefer_localhost_replica = '1', optimize_read_in_order = '1', optimize_aggregation_in_order = '1', read_in_order_two_level_merge_threshold = '1', allow_introspection_functions = '1', check_query_single_value_result = '1', allow_experimental_live_view = '1', default_table_engine = 'Memory', mutations_sync = '2', convert_query_to_cnf = '0', optimize_arithmetic_operations_in_aggregate_functions = '1', optimize_duplicate_order_by_and_distinct = '0', optimize_multiif_to_if = '0', optimize_monotonous_functions_in_order_by = '1', optimize_functions_to_subcolumns = '1', optimize_using_constraints = '1', optimize_substitute_columns = '1', optimize_append_index = '1', transform_null_in = '1', data_type_default_nullable = '1', cast_keep_nullable = '1', cast_ipv4_ipv6_default_on_conversion_error = '0', system_events_show_zero_values = '1', enable_global_with_statement = '1', optimize_on_insert = '0', optimize_rewrite_sum_if_to_count_if = '1', distributed_ddl_output_mode = 'throw', union_default_mode = 'ALL', optimize_aggregators_of_group_by_keys = '1', optimize_group_by_function_keys = '1', short_circuit_function_evaluation = 'enable', async_insert = '1', enable_filesystem_cache = '0', allow_deprecated_database_ordinary = '1', allow_deprecated_syntax_for_merge_tree = '1', allow_experimental_nlp_functions = '1', allow_experimental_object_type = '1', allow_experimental_map_type = '1', optimize_use_projections = '1', input_format_null_as_default = '1', input_format_ipv4_default_on_conversion_error = '0', input_format_ipv6_default_on_conversion_error = '0', output_format_json_named_tuples_as_objects = '1', output_format_write_statistics = '0', output_format_pretty_row_numbers = '1';
SETTINGS max_block_size = '1', min_insert_block_size_rows = '65536', min_insert_block_size_bytes = '0', max_insert_threads = '0', max_threads = '3', receive_timeout = '10', receive_data_timeout_ms = '10000', connections_with_failover_max_tries = '0', extremes = '1', use_uncompressed_cache = '0', optimize_move_to_prewhere = '1', optimize_move_to_prewhere_if_final = '0', replication_alter_partitions_sync = '2', totals_mode = 'before_having', allow_suspicious_low_cardinality_types = '1', compile_expressions = '1', min_count_to_compile_expression = '0', group_by_two_level_threshold = '100', distributed_aggregation_memory_efficient = '0', distributed_group_by_no_merge = '1', optimize_distributed_group_by_sharding_key = '1', optimize_skip_unused_shards = '1', optimize_skip_unused_shards_rewrite_in = '1', force_optimize_skip_unused_shards = '2', optimize_skip_unused_shards_nesting = '1', force_optimize_skip_unused_shards_nesting = '2', merge_tree_min_rows_for_concurrent_read = '10000', force_primary_key = '1', network_compression_method = 'ZSTD', network_zstd_compression_level = '7', log_queries = '0', log_queries_min_type = 'QUERY_FINISH', distributed_product_mode = 'local', insert_quorum = '2', insert_quorum_timeout = '0', insert_quorum_parallel = '0', select_sequential_consistency = '1', join_use_nulls = '1', any_join_distinct_right_table_keys = '1', preferred_max_column_in_block_size_bytes = '32', distributed_foreground_insert = '1', insert_allow_materialized_columns = '1', use_index_for_in_with_subqueries = '1', joined_subquery_requires_alias = '0', empty_result_for_aggregation_by_empty_set = '1', allow_suspicious_codecs = '1', query_profiler_real_time_period_ns = '0', query_profiler_cpu_time_period_ns = '0', opentelemetry_start_trace_probability = '1', max_rows_to_read = '1000000', read_overflow_mode = 'break', max_rows_to_group_by = '10', group_by_overflow_mode = 'any', max_rows_to_sort = '100', sort_overflow_mode = 'break', max_result_rows = '10', max_execution_time = '3', max_execution_speed = '1', max_bytes_in_join = '100', join_algorithm = 'partial_merge', max_memory_usage = '1099511627776', log_query_threads = '1', send_logs_level = 'fatal', enable_optimize_predicate_expression = '1', prefer_localhost_replica = '1', optimize_read_in_order = '1', optimize_aggregation_in_order = '1', read_in_order_two_level_merge_threshold = '1', allow_introspection_functions = '1', check_query_single_value_result = '1', allow_experimental_live_view = '1', default_table_engine = 'Memory', mutations_sync = '2', convert_query_to_cnf = '0', optimize_arithmetic_operations_in_aggregate_functions = '1', optimize_duplicate_order_by_and_distinct = '0', optimize_multiif_to_if = '0', optimize_functions_to_subcolumns = '1', optimize_using_constraints = '1', optimize_substitute_columns = '1', optimize_append_index = '1', transform_null_in = '1', data_type_default_nullable = '1', cast_keep_nullable = '1', cast_ipv4_ipv6_default_on_conversion_error = '0', system_events_show_zero_values = '1', enable_global_with_statement = '1', optimize_on_insert = '0', optimize_rewrite_sum_if_to_count_if = '1', distributed_ddl_output_mode = 'throw', union_default_mode = 'ALL', optimize_aggregators_of_group_by_keys = '1', optimize_group_by_function_keys = '1', short_circuit_function_evaluation = 'enable', async_insert = '1', enable_filesystem_cache = '0', allow_deprecated_database_ordinary = '1', allow_deprecated_syntax_for_merge_tree = '1', allow_experimental_nlp_functions = '1', allow_experimental_object_type = '1', allow_experimental_map_type = '1', optimize_use_projections = '1', input_format_null_as_default = '1', input_format_ipv4_default_on_conversion_error = '0', input_format_ipv6_default_on_conversion_error = '0', output_format_json_named_tuples_as_objects = '1', output_format_write_statistics = '0', output_format_pretty_row_numbers = '1';
DROP TABLE data_a_02187;