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90e2240869
Old code in create_tmp_table(), that created an extra one-byte field (recinfo) before every NULL-able grouping field (Field) in the tmp table, did not actually work. Because the matching code in end_update(), that was supposed to update this byte, was using a wrong offset, updating the first byte of the Field, not a byte before it. Normally this wasn't an issue, because the Field value (written later in end_update) was overwriting this byte anyway. But in this bug the Field was Field_null, with zero length, so end_update() was overwriting the first byte of the following field. And the following field was not-nullable constant, which was stored only once in create_tmp_table and never updated later. Fixed by removing the code that didn't do any useful work anyway.
7 lines
288 B
Text
7 lines
288 B
Text
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# MDEV-5461 Assertion `length <= column->length' fails in write_block_record with functions in select list, GROUP BY, ORDER BY
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create table t1 (a int);
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insert into t1 values (1),(2);
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select max('foo') from t1 group by values(a), extractvalue('bar','qux') order by "v";
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drop table t1;
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