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make MergeTree work with comments

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This commit is contained in:
Sabyanin Maxim 2018-11-15 16:12:27 +03:00
parent 035049d1a8
commit d9e6789f78
6 changed files with 103 additions and 57 deletions
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11
dbms/src/Storages/AlterCommands.cpp
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@ -477,4 +477,15 @@ void AlterCommands::validate(const IStorage & table, const Context & context)
}
}
bool AlterCommands::is_mutable() const
{
for (const auto & param : *this)
{
if (param.is_mutable())
return true;
}
return false;
}
}

1
dbms/src/Storages/AlterCommands.h
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@ -70,6 +70,7 @@ public:
void apply(ColumnsDescription & columns_description) const;
void validate(const IStorage & table, const Context & context);
bool is_mutable() const;
};
}

2
dbms/src/Storages/MergeTree/MergeTreeData.cpp
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@ -908,7 +908,7 @@ void MergeTreeData::checkAlter(const AlterCommands & commands)
for (const AlterCommand & command : commands)
{
if (command.type == AlterCommand::COMMENT_COLUMN)
if (!command.is_mutable())
{
continue;
}

10
dbms/src/Storages/StorageMergeTree.cpp
View File

@ -188,6 +188,16 @@ void StorageMergeTree::alter(
const String & table_name,
const Context & context)
{
if (!params.is_mutable())
{
auto table_soft_lock = lockStructureForAlter(__PRETTY_FUNCTION__);
auto new_columns = getColumns();
params.apply(new_columns);
context.getDatabase(database_name)->alterTable(context, table_name, new_columns, {});
setColumns(std::move(new_columns));
return;
}
/// NOTE: Here, as in ReplicatedMergeTree, you can do ALTER which does not block the writing of data for a long time.
auto merge_blocker = merger_mutator.actions_blocker.cancel();

64
dbms/tests/queries/0_stateless/00725_comment_columns.reference
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@ -1,28 +1,38 @@
CREATE TABLE test.check_query_comment_column ( first_column UInt8 DEFAULT 1 COMMENT \'first comment\', fourth_column UInt8 COMMENT \'fourth comment\', fifth_column UInt8, second_column UInt8 MATERIALIZED first_column COMMENT \'second comment\', third_column UInt8 ALIAS second_column COMMENT \'third comment\') ENGINE = TinyLog
┌─table──────────────────────┬─name──────────┬─comment────────┐
│ check_query_comment_column │ first_column │ first comment │
│ check_query_comment_column │ fourth_column │ fourth comment │
CREATE TABLE test.check_query_comment_column ( first_column UInt8 DEFAULT 1 COMMENT \'comment 1\', fourth_column UInt8 COMMENT \'comment 4\', fifth_column UInt8, second_column UInt8 MATERIALIZED first_column COMMENT \'comment 2\', third_column UInt8 ALIAS second_column COMMENT \'comment 3\') ENGINE = TinyLog
first_column UInt8 DEFAULT 1 comment 1
fourth_column UInt8 comment 4
fifth_column UInt8
second_column UInt8 MATERIALIZED first_column comment 2
third_column UInt8 ALIAS second_column comment 3
┌─table──────────────────────┬─name──────────┬─comment───┐
│ check_query_comment_column │ first_column │ comment 1 │
│ check_query_comment_column │ fourth_column │ comment 4 │
│ check_query_comment_column │ fifth_column │ │
│ check_query_comment_column │ second_column │ second comment │
│ check_query_comment_column │ third_column │ third comment │
└────────────────────────────┴───────────────┴────────────────┘
CREATE TABLE test.check_query_comment_column ( first_column UInt8 DEFAULT 1 COMMENT \'another first column\', fourth_column UInt8 COMMENT \'another fourth column\', fifth_column UInt8 COMMENT \'another fifth column\', second_column UInt8 MATERIALIZED first_column COMMENT \'another second column\', third_column UInt8 ALIAS second_column COMMENT \'another third column\') ENGINE = TinyLog
┌─table──────────────────────┬─name──────────┬─comment───────────────┐
│ check_query_comment_column │ first_column │ another first column │
│ check_query_comment_column │ fourth_column │ another fourth column │
│ check_query_comment_column │ fifth_column │ another fifth column │
│ check_query_comment_column │ second_column │ another second column │
│ check_query_comment_column │ third_column │ another third column │
└────────────────────────────┴───────────────┴───────────────────────┘
CREATE TABLE test.check_query_comment_column ( first_column Date COMMENT \'first comment\', second_column UInt8 COMMENT \'second comment\', third_column UInt8 COMMENT \'third comment\') ENGINE = MergeTree(first_column, (second_column, second_column), 8192)
┌─table──────────────────────┬─name──────────┬─comment────────┐
│ check_query_comment_column │ first_column │ first comment │
│ check_query_comment_column │ second_column │ second comment │
│ check_query_comment_column │ third_column │ third comment │
└────────────────────────────┴───────────────┴────────────────┘
CREATE TABLE test.check_query_comment_column ( first_column Date COMMENT \'another first comment\', second_column UInt8 COMMENT \'another second comment\', third_column UInt8 COMMENT \'another third comment\') ENGINE = MergeTree(first_column, (second_column, second_column), 8192)
┌─table──────────────────────┬─name──────────┬─comment────────────────┐
│ check_query_comment_column │ first_column │ another first comment │
│ check_query_comment_column │ second_column │ another second comment │
│ check_query_comment_column │ third_column │ another third comment │
└────────────────────────────┴───────────────┴────────────────────────┘
│ check_query_comment_column │ second_column │ comment 2 │
│ check_query_comment_column │ third_column │ comment 3 │
└────────────────────────────┴───────────────┴───────────┘
CREATE TABLE test.check_query_comment_column ( first_column UInt8 DEFAULT 1 COMMENT \'comment 1_1\', fourth_column UInt8 COMMENT \'comment 4_1\', fifth_column UInt8 COMMENT \'comment 5_1\', second_column UInt8 MATERIALIZED first_column COMMENT \'comment 2_1\', third_column UInt8 ALIAS second_column COMMENT \'comment 3_1\') ENGINE = TinyLog
┌─table──────────────────────┬─name──────────┬─comment─────┐
│ check_query_comment_column │ first_column │ comment 1_2 │
│ check_query_comment_column │ fourth_column │ comment 4_2 │
│ check_query_comment_column │ fifth_column │ comment 5_2 │
│ check_query_comment_column │ second_column │ comment 2_2 │
│ check_query_comment_column │ third_column │ comment 3_2 │
└────────────────────────────┴───────────────┴─────────────┘
CREATE TABLE test.check_query_comment_column ( first_column UInt8 DEFAULT 1 COMMENT \'comment 1_2\', fourth_column UInt8 COMMENT \'comment 4_2\', fifth_column UInt8 COMMENT \'comment 5_2\', second_column UInt8 MATERIALIZED first_column COMMENT \'comment 2_2\', third_column UInt8 ALIAS second_column COMMENT \'comment 3_2\') ENGINE = TinyLog
CREATE TABLE test.check_query_comment_column ( first_column UInt8 COMMENT \'comment 1\', second_column UInt8 COMMENT \'comment 2\', third_column UInt8 COMMENT \'comment 3\') ENGINE = MergeTree() PARTITION BY second_column ORDER BY first_column SAMPLE BY first_column SETTINGS index_granularity = 8192
first_column UInt8 comment 1
second_column UInt8 comment 2
third_column UInt8 comment 3
┌─table──────────────────────┬─name──────────┬─comment───┐
│ check_query_comment_column │ first_column │ comment 1 │
│ check_query_comment_column │ second_column │ comment 2 │
│ check_query_comment_column │ third_column │ comment 3 │
└────────────────────────────┴───────────────┴───────────┘
CREATE TABLE test.check_query_comment_column ( first_column UInt8 COMMENT \'comment 1_2\', second_column UInt8 COMMENT \'comment 2_2\', third_column UInt8 COMMENT \'comment 3_2\') ENGINE = MergeTree() PARTITION BY second_column ORDER BY first_column SAMPLE BY first_column SETTINGS index_granularity = 8192
CREATE TABLE test.check_query_comment_column ( first_column UInt8 COMMENT \'comment 1_3\', second_column UInt8 COMMENT \'comment 2_3\', third_column UInt8 COMMENT \'comment 3_3\') ENGINE = MergeTree() PARTITION BY second_column ORDER BY first_column SAMPLE BY first_column SETTINGS index_granularity = 8192
┌─table──────────────────────┬─name──────────┬─comment─────┐
│ check_query_comment_column │ first_column │ comment 1_3 │
│ check_query_comment_column │ second_column │ comment 2_3 │
│ check_query_comment_column │ third_column │ comment 3_3 │
└────────────────────────────┴───────────────┴─────────────┘

70
dbms/tests/queries/0_stateless/00725_comment_columns.sql
View File

@ -1,16 +1,18 @@
CREATE DATABASE IF NOT EXISTS test;
DROP TABLE IF EXISTS test.check_query_comment_column;
-- Check COMMENT COLUMN and MODIFY COLUMN statements with simple engine
CREATE TABLE test.check_query_comment_column
(
first_column UInt8 DEFAULT 1 COMMENT 'first comment',
second_column UInt8 MATERIALIZED first_column COMMENT 'second comment',
third_column UInt8 ALIAS second_column COMMENT 'third comment',
fourth_column UInt8 COMMENT 'fourth comment',
first_column UInt8 DEFAULT 1 COMMENT 'comment 1',
second_column UInt8 MATERIALIZED first_column COMMENT 'comment 2',
third_column UInt8 ALIAS second_column COMMENT 'comment 3',
fourth_column UInt8 COMMENT 'comment 4',
fifth_column UInt8
) ENGINE = TinyLog;
SHOW CREATE TABLE test.check_query_comment_column;
DESCRIBE TABLE test.check_query_comment_column;
SELECT table, name, comment
FROM system.columns
@ -18,30 +20,42 @@ WHERE table = 'check_query_comment_column' AND database = 'test'
FORMAT PrettyCompactNoEscapes;
ALTER TABLE test.check_query_comment_column
COMMENT COLUMN first_column 'another first column',
COMMENT COLUMN second_column 'another second column',
COMMENT COLUMN third_column 'another third column',
COMMENT COLUMN fourth_column 'another fourth column',
COMMENT COLUMN fifth_column 'another fifth column';
COMMENT COLUMN first_column 'comment 1_1',
COMMENT COLUMN second_column 'comment 2_1',
COMMENT COLUMN third_column 'comment 3_1',
COMMENT COLUMN fourth_column 'comment 4_1',
COMMENT COLUMN fifth_column 'comment 5_1';
SHOW CREATE TABLE test.check_query_comment_column;
ALTER TABLE test.check_query_comment_column
MODIFY COLUMN first_column COMMENT 'comment 1_2',
MODIFY COLUMN second_column COMMENT 'comment 2_2',
MODIFY COLUMN third_column COMMENT 'comment 3_2',
MODIFY COLUMN fourth_column COMMENT 'comment 4_2',
MODIFY COLUMN fifth_column COMMENT 'comment 5_2';
SELECT table, name, comment
FROM system.columns
WHERE table = 'check_query_comment_column' AND database = 'test'
FORMAT PrettyCompactNoEscapes;
SHOW CREATE TABLE test.check_query_comment_column;
DROP TABLE IF EXISTS test.check_query_comment_column;
-- Check `ALTER TABLE table_name COMMENT COLUMN 'comment'` statement with MergeTree engine
CREATE TABLE test.check_query_comment_column
(
first_column Date COMMENT 'first comment',
second_column UInt8 COMMENT 'second comment',
third_column UInt8 COMMENT 'third comment'
) ENGINE = MergeTree(first_column, (second_column, second_column), 8192);
first_column UInt8 COMMENT 'comment 1',
second_column UInt8 COMMENT 'comment 2',
third_column UInt8 COMMENT 'comment 3'
) ENGINE = MergeTree()
ORDER BY first_column
PARTITION BY second_column
SAMPLE BY first_column;
SHOW CREATE TABLE test.check_query_comment_column;
DESCRIBE TABLE test.check_query_comment_column;
SELECT table, name, comment
FROM system.columns
@ -49,25 +63,23 @@ WHERE table = 'check_query_comment_column' AND database = 'test'
FORMAT PrettyCompactNoEscapes;
ALTER TABLE test.check_query_comment_column
COMMENT COLUMN first_column 'another first comment',
COMMENT COLUMN second_column 'another second comment',
COMMENT COLUMN third_column 'another third comment';
COMMENT COLUMN first_column 'comment 1_2',
COMMENT COLUMN second_column 'comment 2_2',
COMMENT COLUMN third_column 'comment 3_2';
SHOW CREATE TABLE test.check_query_comment_column;
SELECT table, name, comment
FROM system.columns
WHERE table = 'check_query_comment_column' and database = 'test'
FORMAT PrettyCompactNoEscapes;
ALTER TABLE test.check_query_comment_column
MODIFY COLUMN first_column COMMENT 'comment 1_3',
MODIFY COLUMN second_column COMMENT 'comment 2_3',
MODIFY COLUMN third_column COMMENT 'comment 3_3';
DROP TABLE IF test.check_query_comment_column;
SHOW CREATE TABLE test.check_query_comment_column;
CREATE TABLE test.check_query_comment_column
(
first_column UInt8 COMMENT 'first comment'
) ENGINE = TinyLog;
ALTER TABLE test.check_query_comment_column MODIFY COLUMN first_column COMMENT 'another comment';
ALTER TABLE test.check_query_comment_column
MODIFY COLUMN first_column DEFAULT 1 COMMENT 'comment 1_3',
MODIFY COLUMN second_column COMMENT 'comment 2_3', -- We can't change default value of partition key.
MODIFY COLUMN third_column DEFAULT 1 COMMENT 'comment 3_3';
SELECT table, name, comment
FROM system.columns
@ -75,3 +87,5 @@ WHERE table = 'check_query_comment_column' and database = 'test'
FORMAT PrettyCompactNoEscapes;
DROP TABLE IF EXISTS test.check_query_comment_column;
-- TODO: add here tests with ReplicatedMergeTree