24 lines
585 B
Plaintext
24 lines
585 B
Plaintext
set global innodb_compression_level = 0;
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CREATE TABLE t(j1 JSON) row_format = compressed;
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start transaction;
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# Sven
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select json_extract(j1, '$[0]') from t;
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json_extract(j1, '$[0]')
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"Sven"
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UPDATE t SET j1 = JSON_SET(j1, '$[0]', 'Knut');
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# Knut
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select json_extract(j1, '$[0]') from t;
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json_extract(j1, '$[0]')
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"Knut"
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UPDATE t SET j1 = JSON_SET(j1, '$[0]', 'Anna');
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# Anna
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select json_extract(j1, '$[0]') from t;
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json_extract(j1, '$[0]')
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"Anna"
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rollback;
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select json_extract(j1, '$[0]') from t;
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json_extract(j1, '$[0]')
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"Sven"
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drop table t;
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set global innodb_compression_level = default;
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