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Merge pull request #3609 from s-mx/CLICKHOUSE-4090

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Add primary_key, order_key, partition_key and sample_key to system.tables.
This commit is contained in:
alexey-milovidov 2018-11-20 16:39:54 +03:00 committed by GitHub
commit a008a41374
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12 changed files with 279 additions and 5 deletions
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2
dbms/src/Core/Names.h
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@ -2,6 +2,7 @@
#include <vector>
#include <string>
#include <set>
#include <unordered_set>
#include <unordered_map>
@ -11,6 +12,7 @@ namespace DB
using Names = std::vector<std::string>;
using NameSet = std::unordered_set<std::string>;
using NameOrderedSet = std::set<std::string>;
using NameToNameMap = std::unordered_map<std::string, std::string>;
using NameToNameSetMap = std::unordered_map<std::string, NameSet>;

1
dbms/src/Interpreters/InterpreterCreateQuery.cpp
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@ -350,7 +350,6 @@ ASTPtr InterpreterCreateQuery::formatColumns(const ColumnsDescription & columns)
return columns_list;
}
ColumnsDescription InterpreterCreateQuery::getColumnsDescription(const ASTExpressionList & columns, const Context & context)
{
ColumnsDescription res;

19
dbms/src/Storages/IStorage.h
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@ -3,6 +3,7 @@
#include <Core/Names.h>
#include <Common/Exception.h>
#include <Common/RWLockFIFO.h>
#include <Core/Names.h>
#include <Core/QueryProcessingStage.h>
#include <Storages/ITableDeclaration.h>
#include <Storages/SelectQueryInfo.h>
@ -349,6 +350,24 @@ public:
/// Returns primary expression for storage or nullptr if there is no.
virtual ASTPtr getPrimaryExpression() const { return nullptr; }
/// Returns partition expression for storage or nullptr if there is no.
virtual ASTPtr getPartitionExpression() const { return nullptr; }
/// Returns secondary expression for storage or nullptr if there is no.
virtual ASTPtr getOrderExpression() const { return nullptr; }
/// Returns sampling key names for storage or empty vector if there is no.
virtual Names getSamplingExpressionNames() const { return {}; }
/// Returns primary key names for storage or empty vector if there is no.
virtual Names getPrimaryExpressionNames() const { return {}; }
/// Returns partition key names for storage or empty vector if there is no.
virtual Names getPartitionExpressionNames() const { return {}; }
/// Returns order key names for storage or empty vector if there is no.
virtual Names getOrderExpressionNames() const { return {}; }
using ITableDeclaration::ITableDeclaration;
using std::enable_shared_from_this<IStorage>::shared_from_this;

30
dbms/src/Storages/StorageMergeTree.cpp
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@ -938,4 +938,34 @@ ActionLock StorageMergeTree::getActionLock(StorageActionBlockType action_type)
return {};
}
Names StorageMergeTree::getSamplingExpressionNames() const
{
NameOrderedSet names;
const auto & expr = data.sampling_expression;
if (expr)
expr->collectIdentifierNames(names);
return Names(names.begin(), names.end());
}
Names StorageMergeTree::getPrimaryExpressionNames() const
{
return data.getPrimarySortColumns();
}
Names StorageMergeTree::getPartitionExpressionNames() const
{
NameOrderedSet names;
const auto & expr = data.partition_expr_ast;
if (expr)
expr->collectIdentifierNames(names);
return Names(names.cbegin(), names.cend());
}
Names StorageMergeTree::getOrderExpressionNames() const
{
return data.getSortColumns();
}
}

12
dbms/src/Storages/StorageMergeTree.h
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@ -2,6 +2,7 @@
#include <ext/shared_ptr_helper.h>
#include <Core/Names.h>
#include <Storages/IStorage.h>
#include <Storages/MergeTree/MergeTreeData.h>
#include <Storages/MergeTree/MergeTreeDataSelectExecutor.h>
@ -98,6 +99,17 @@ public:
ASTPtr getPrimaryExpression() const override { return data.primary_expr_ast; }
ASTPtr getPartitionExpression() const override { return data.partition_expr_ast; }
ASTPtr getOrderExpression() const override { return data.secondary_sort_expr_ast; }
Names getSamplingExpressionNames() const override;
Names getPrimaryExpressionNames() const override;
Names getPartitionExpressionNames() const override;
Names getOrderExpressionNames() const override;
private:
String path;
String database_name;

30
dbms/src/Storages/StorageReplicatedMergeTree.cpp
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@ -4856,4 +4856,34 @@ bool StorageReplicatedMergeTree::dropPartsInPartition(
return true;
}
Names StorageReplicatedMergeTree::getSamplingExpressionNames() const
{
NameOrderedSet names;
const auto & expr = data.sampling_expression;
if (expr)
expr->collectIdentifierNames(names);
return Names(names.begin(), names.end());
}
Names StorageReplicatedMergeTree::getPrimaryExpressionNames() const
{
return data.getPrimarySortColumns();
}
Names StorageReplicatedMergeTree::getOrderExpressionNames() const
{
return data.getSortColumns();
}
Names StorageReplicatedMergeTree::getPartitionExpressionNames() const
{
NameOrderedSet names;
const auto & expr = data.partition_expr_ast;
if (expr)
expr->collectIdentifierNames(names);
return Names(names.cbegin(), names.cend());
}
}

8
dbms/src/Storages/StorageReplicatedMergeTree.h
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@ -197,6 +197,14 @@ public:
ASTPtr getPrimaryExpression() const override { return data.primary_expr_ast; }
Names getSamplingExpressionNames() const override;
Names getPrimaryExpressionNames() const override;
Names getOrderExpressionNames() const override;
Names getPartitionExpressionNames() const override;
private:
/// Delete old parts from disk and from ZooKeeper.
void clearOldPartsAndRemoveFromZK();

29
dbms/src/Storages/System/StorageSystemColumns.cpp
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@ -36,6 +36,10 @@ StorageSystemColumns::StorageSystemColumns(const std::string & name_)
{ "data_compressed_bytes", std::make_shared<DataTypeUInt64>() },
{ "data_uncompressed_bytes", std::make_shared<DataTypeUInt64>() },
{ "marks_bytes", std::make_shared<DataTypeUInt64>() },
{ "is_in_primary_key", std::make_shared<DataTypeUInt8>() },
{ "is_in_order_key", std::make_shared<DataTypeUInt8>() },
{ "is_in_partition_key", std::make_shared<DataTypeUInt8>() },
{ "is_in_sample_key", std::make_shared<DataTypeUInt8>() },
}));
}
@ -80,6 +84,10 @@ protected:
NamesAndTypesList columns;
ColumnDefaults column_defaults;
Names partition_key_names;
Names order_key_names;
Names primary_key_names;
Names sampling_key_names;
MergeTreeData::ColumnSizeByName column_sizes;
{
@ -106,6 +114,11 @@ protected:
columns = storage->getColumns().getAll();
column_defaults = storage->getColumns().defaults;
partition_key_names = storage->getPartitionExpressionNames();
order_key_names = storage->getOrderExpressionNames();
primary_key_names = storage->getPrimaryExpressionNames();
sampling_key_names = storage->getSamplingExpressionNames();
/** Info about sizes of columns for tables of MergeTree family.
* NOTE: It is possible to add getter for this info to IStorage interface.
*/
@ -173,6 +186,22 @@ protected:
}
}
{
auto find_in_vector = [&key = column.name](const Names& names)
{
return std::find(names.cbegin(), names.cend(), key) != names.end();
};
if (columns_mask[src_index++])
res_columns[res_index++]->insert(find_in_vector(primary_key_names));
if (columns_mask[src_index++])
res_columns[res_index++]->insert(find_in_vector(order_key_names));
if (columns_mask[src_index++])
res_columns[res_index++]->insert(find_in_vector(partition_key_names));
if (columns_mask[src_index++])
res_columns[res_index++]->insert(find_in_vector(sampling_key_names));
}
++rows_count;
}
}

58
dbms/src/Storages/System/StorageSystemTables.cpp
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@ -39,7 +39,11 @@ StorageSystemTables::StorageSystemTables(const std::string & name_)
{"dependencies_database", std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>())},
{"dependencies_table", std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>())},
{"create_table_query", std::make_shared<DataTypeString>()},
{"engine_full", std::make_shared<DataTypeString>()}
{"engine_full", std::make_shared<DataTypeString>()},
{"primary_key", std::make_shared<DataTypeString>()},
{"order_key", std::make_shared<DataTypeString>()},
{"partition_key", std::make_shared<DataTypeString>()},
{"sample_key", std::make_shared<DataTypeString>()},
}));
}
@ -65,7 +69,7 @@ public:
size_t max_block_size,
ColumnPtr databases,
const Context & context)
: columns_mask(columns_mask), header(header), max_block_size(max_block_size), databases(std::move(databases)), context(context) {}
: columns_mask(std::move(columns_mask)), header(std::move(header)), max_block_size(max_block_size), databases(std::move(databases)), context(context) {}
String getName() const override { return "Tables"; }
Block getHeader() const override { return header; }
@ -144,6 +148,18 @@ protected:
if (columns_mask[src_index++])
res_columns[res_index++]->insert(table.second->getName());
if (columns_mask[src_index++])
res_columns[res_index++]->insertDefault();
if (columns_mask[src_index++])
res_columns[res_index++]->insertDefault();
if (columns_mask[src_index++])
res_columns[res_index++]->insertDefault();
if (columns_mask[src_index++])
res_columns[res_index++]->insertDefault();
}
}
@ -173,7 +189,7 @@ protected:
res_columns[res_index++]->insert(tables_it->table()->getName());
if (columns_mask[src_index++])
res_columns[res_index++]->insert(0u);
res_columns[res_index++]->insert(0u); // is_temporary
if (columns_mask[src_index++])
res_columns[res_index++]->insert(tables_it->table()->getDataPath());
@ -234,6 +250,42 @@ protected:
res_columns[res_index++]->insert(engine_full);
}
}
else
src_index += 2;
const auto table_it = context.getTable(database_name, table_name);
ASTPtr expression_ptr;
if (columns_mask[src_index++])
{
if ((expression_ptr = table_it->getPrimaryExpression()))
res_columns[res_index++]->insert(queryToString(expression_ptr));
else
res_columns[res_index++]->insertDefault();
}
if (columns_mask[src_index++])
{
if ((expression_ptr = table_it->getOrderExpression()))
res_columns[res_index++]->insert(queryToString(expression_ptr));
else
res_columns[res_index++]->insertDefault();
}
if (columns_mask[src_index++])
{
if ((expression_ptr = table_it->getPartitionExpression()))
res_columns[res_index++]->insert(queryToString(expression_ptr));
else
res_columns[res_index++]->insertDefault();
}
if (columns_mask[src_index++])
{
if ((expression_ptr = table_it->getSamplingExpression()))
res_columns[res_index++]->insert(queryToString(expression_ptr));
else
res_columns[res_index++]->insertDefault();
}
}
}

25
dbms/tests/queries/0_stateless/00753_system_columns_and_system_tables.reference Normal file
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@ -0,0 +1,25 @@
┌─name────────────────┬─primary_key─┬─order_key─┬─partition_key─┬─sample_key─┐
│ check_system_tables │ name1 │ │ name2 │ name1 │
└─────────────────────┴─────────────┴───────────┴───────────────┴────────────┘
┌─name──┬─is_in_primary_key─┬─is_in_order_key─┬─is_in_partition_key─┬─is_in_sample_key─┐
│ name1 │ 1 │ 1 │ 0 │ 1 │
│ name2 │ 0 │ 0 │ 1 │ 0 │
│ name3 │ 0 │ 0 │ 0 │ 0 │
└───────┴───────────────────┴─────────────────┴─────────────────────┴──────────────────┘
┌─name────────────────┬─primary_key─┬─order_key─┬─partition_key─┬─sample_key─┐
│ check_system_tables │ date │ version │ date │ │
└─────────────────────┴─────────────┴───────────┴───────────────┴────────────┘
┌─name────┬─is_in_primary_key─┬─is_in_order_key─┬─is_in_partition_key─┬─is_in_sample_key─┐
│ date │ 1 │ 1 │ 1 │ 0 │
│ value │ 0 │ 0 │ 0 │ 0 │
│ version │ 0 │ 1 │ 0 │ 0 │
│ sign │ 0 │ 0 │ 0 │ 0 │
└─────────┴───────────────────┴─────────────────┴─────────────────────┴──────────────────┘
┌─name────────────────┬─primary_key───────────────────────┬─order_key─┬─partition_key───┬─sample_key────────┐
│ check_system_tables │ Counter, Event, intHash32(UserId) │ │ toYYYYMM(Event) │ intHash32(UserId) │
└─────────────────────┴───────────────────────────────────┴───────────┴─────────────────┴───────────────────┘
┌─name────┬─is_in_primary_key─┬─is_in_order_key─┬─is_in_partition_key─┬─is_in_sample_key─┐
│ Event │ 1 │ 1 │ 1 │ 0 │
│ UserId │ 0 │ 0 │ 0 │ 1 │
│ Counter │ 1 │ 1 │ 0 │ 0 │
└─────────┴───────────────────┴─────────────────┴─────────────────────┴──────────────────┘

68
dbms/tests/queries/0_stateless/00753_system_columns_and_system_tables.sql Normal file
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@ -0,0 +1,68 @@
CREATE DATABASE IF NOT EXISTS test;
DROP TABLE IF EXISTS test.check_system_tables;
-- Check MergeTree declaration in new format
CREATE TABLE test.check_system_tables
(
name1 UInt8,
name2 UInt8,
name3 UInt8
) ENGINE = MergeTree()
ORDER BY name1
PARTITION BY name2
SAMPLE BY name1;
SELECT name, primary_key, order_key, partition_key, sample_key
FROM system.tables
WHERE name = 'check_system_tables'
FORMAT PrettyCompactNoEscapes;
SELECT name, is_in_primary_key, is_in_order_key, is_in_partition_key, is_in_sample_key
FROM system.columns
WHERE table = 'check_system_tables'
FORMAT PrettyCompactNoEscapes;
DROP TABLE IF EXISTS test.check_system_tables;
-- Check VersionedCollapsingMergeTree
CREATE TABLE test.check_system_tables
(
date Date,
value String,
version UInt64,
sign Int8
) ENGINE = VersionedCollapsingMergeTree(sign, version)
PARTITION BY date
ORDER BY date;
SELECT name, primary_key, order_key, partition_key, sample_key
FROM system.tables
WHERE name = 'check_system_tables'
FORMAT PrettyCompactNoEscapes;
SELECT name, is_in_primary_key, is_in_order_key, is_in_partition_key, is_in_sample_key
FROM system.columns
WHERE table = 'check_system_tables'
FORMAT PrettyCompactNoEscapes;
DROP TABLE IF EXISTS test.check_system_tables;
-- Check MergeTree declaration in old format
CREATE TABLE test.check_system_tables
(
Event Date,
UserId UInt32,
Counter UInt32
) ENGINE = MergeTree(Event, intHash32(UserId), (Counter, Event, intHash32(UserId)), 8192);
SELECT name, primary_key, order_key, partition_key, sample_key
FROM system.tables
WHERE name = 'check_system_tables'
FORMAT PrettyCompactNoEscapes;
SELECT name, is_in_primary_key, is_in_order_key, is_in_partition_key, is_in_sample_key
FROM system.columns
WHERE table = 'check_system_tables'
FORMAT PrettyCompactNoEscapes;
DROP TABLE IF EXISTS test.check_system_tables;