33 lines
623 B
MySQL
33 lines
623 B
MySQL
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PRAGMA journal_mode = OFF;
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PRAGMA synchronous = OFF;
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PRAGMA temp_store = MEMORY;
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-- schema
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CREATE TABLE t (
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id INTEGER PRIMARY KEY,
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s TEXT
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);
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-- bulk insert via recursive CTE (~50k rows)
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WITH RECURSIVE cnt(x) AS (
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SELECT 1
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UNION ALL
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SELECT x+1 FROM cnt LIMIT 50000
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)
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INSERT INTO t(s)
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SELECT printf('str-%d-%d', x, x*x) FROM cnt;
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-- simple read queries
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SELECT COUNT(*) FROM t;
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SELECT SUM(LENGTH(s)) FROM t;
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-- point lookups
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SELECT s FROM t WHERE id IN (1, 100, 1000, 10000, 40000);
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-- update a slice
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UPDATE t SET s = s || '-x' WHERE (id % 50) = 0;
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-- final check
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SELECT COUNT(*) FROM t WHERE s LIKE '%-x';
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