mirror of
https://github.com/ClickHouse/ClickHouse.git
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38 lines
868 B
MySQL
38 lines
868 B
MySQL
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DROP TABLE IF EXISTS rawtable;
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DROP TABLE IF EXISTS raw_to_attributes_mv;
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DROP TABLE IF EXISTS attributes;
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SET optimize_functions_to_subcolumns = 1;
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CREATE TABLE rawtable
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(
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`Attributes` Map(String, String),
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)
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ENGINE = MergeTree
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ORDER BY tuple();
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CREATE MATERIALIZED VIEW raw_to_attributes_mv TO attributes
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(
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`AttributeKeys` Array(String),
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`AttributeValues` Array(String)
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)
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AS SELECT
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mapKeys(Attributes) AS AttributeKeys,
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mapValues(Attributes) AS AttributeValues
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FROM rawtable;
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CREATE TABLE attributes
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(
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`AttributeKeys` Array(String),
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`AttributeValues` Array(String)
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)
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ENGINE = ReplacingMergeTree
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ORDER BY tuple();
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INSERT INTO rawtable VALUES ({'key1': 'value1', 'key2': 'value2'});
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SELECT * FROM raw_to_attributes_mv ORDER BY AttributeKeys;
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DROP TABLE IF EXISTS rawtable;
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DROP TABLE IF EXISTS raw_to_attributes_mv;
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DROP TABLE IF EXISTS attributes;
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