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https://github.com/ClickHouse/ClickHouse.git
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96 lines
3.5 KiB
SQL
96 lines
3.5 KiB
SQL
DROP DATABASE IF EXISTS 01778_db;
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CREATE DATABASE 01778_db;
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CREATE TABLE 01778_db.hierarchy_source_table (id UInt64, parent_id UInt64) ENGINE = TinyLog;
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INSERT INTO 01778_db.hierarchy_source_table VALUES (1, 0), (2, 1), (3, 1), (4, 2);
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CREATE DICTIONARY 01778_db.hierarchy_flat_dictionary
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(
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id UInt64,
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parent_id UInt64 HIERARCHICAL
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)
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PRIMARY KEY id
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SOURCE(CLICKHOUSE(HOST 'localhost' PORT tcpPort() USER 'default' TABLE 'hierarchy_source_table' DB '01778_db'))
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LAYOUT(FLAT())
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LIFETIME(MIN 1 MAX 1000);
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SELECT 'Flat dictionary';
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SELECT 'Get hierarchy';
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SELECT dictGetHierarchy('01778_db.hierarchy_flat_dictionary', number) FROM system.numbers LIMIT 6;
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SELECT 'Get is in hierarchy';
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SELECT dictIsIn('01778_db.hierarchy_flat_dictionary', number, number) FROM system.numbers LIMIT 6;
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SELECT 'Get children';
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SELECT dictGetChildren('01778_db.hierarchy_flat_dictionary', number) FROM system.numbers LIMIT 6;
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SELECT 'Get all descendants';
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SELECT dictGetDescendants('01778_db.hierarchy_flat_dictionary', number) FROM system.numbers LIMIT 6;
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SELECT 'Get descendants at first level';
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SELECT dictGetDescendants('01778_db.hierarchy_flat_dictionary', number, 1) FROM system.numbers LIMIT 6;
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DROP DICTIONARY 01778_db.hierarchy_flat_dictionary;
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CREATE DICTIONARY 01778_db.hierarchy_hashed_dictionary
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(
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id UInt64,
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parent_id UInt64 HIERARCHICAL
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)
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PRIMARY KEY id
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SOURCE(CLICKHOUSE(HOST 'localhost' PORT tcpPort() USER 'default' TABLE 'hierarchy_source_table' DB '01778_db'))
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LAYOUT(HASHED())
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LIFETIME(MIN 1 MAX 1000);
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SELECT 'Hashed dictionary';
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SELECT 'Get hierarchy';
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SELECT dictGetHierarchy('01778_db.hierarchy_hashed_dictionary', number) FROM system.numbers LIMIT 6;
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SELECT 'Get is in hierarchy';
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SELECT dictIsIn('01778_db.hierarchy_hashed_dictionary', number, number) FROM system.numbers LIMIT 6;
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SELECT 'Get children';
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SELECT dictGetChildren('01778_db.hierarchy_hashed_dictionary', number) FROM system.numbers LIMIT 6;
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SELECT 'Get all descendants';
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SELECT dictGetDescendants('01778_db.hierarchy_hashed_dictionary', number) FROM system.numbers LIMIT 6;
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SELECT 'Get descendants at first level';
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SELECT dictGetDescendants('01778_db.hierarchy_hashed_dictionary', number, 1) FROM system.numbers LIMIT 6;
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DROP DICTIONARY 01778_db.hierarchy_hashed_dictionary;
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CREATE DICTIONARY 01778_db.hierarchy_cache_dictionary
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(
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id UInt64,
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parent_id UInt64 HIERARCHICAL
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)
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PRIMARY KEY id
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SOURCE(CLICKHOUSE(HOST 'localhost' PORT tcpPort() USER 'default' TABLE 'hierarchy_source_table' DB '01778_db'))
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LAYOUT(CACHE(SIZE_IN_CELLS 10))
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LIFETIME(MIN 1 MAX 1000);
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SELECT 'Cache dictionary';
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SELECT 'Get hierarchy';
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SELECT dictGetHierarchy('01778_db.hierarchy_cache_dictionary', number) FROM system.numbers LIMIT 6;
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SELECT 'Get is in hierarchy';
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SELECT dictIsIn('01778_db.hierarchy_cache_dictionary', number, number) FROM system.numbers LIMIT 6;
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DROP DICTIONARY 01778_db.hierarchy_cache_dictionary;
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CREATE DICTIONARY 01778_db.hierarchy_direct_dictionary
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(
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id UInt64,
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parent_id UInt64 HIERARCHICAL
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)
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PRIMARY KEY id
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SOURCE(CLICKHOUSE(HOST 'localhost' PORT tcpPort() USER 'default' TABLE 'hierarchy_source_table' DB '01778_db'))
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LAYOUT(DIRECT());
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SELECT 'Direct dictionary';
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SELECT 'Get hierarchy';
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SELECT dictGetHierarchy('01778_db.hierarchy_direct_dictionary', number) FROM system.numbers LIMIT 6;
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SELECT 'Get is in hierarchy';
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SELECT dictIsIn('01778_db.hierarchy_direct_dictionary', number, number) FROM system.numbers LIMIT 6;
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DROP DICTIONARY 01778_db.hierarchy_direct_dictionary;
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DROP TABLE 01778_db.hierarchy_source_table;
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DROP DATABASE 01778_db;
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