dbug_print_table_row() function was introduced to allow printing rows from debugger:
Example:
create table t1 (a int, b varchar(10));
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insert into t1 values (1,'yksi'), (2,'kaksi');
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Now in debugger:
Then run a query:
in debugger:
Thread 17 "mysqld" hit Breakpoint 1, rr_sequential (info=0x7fff180193d8) at
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..../sql/records.cc:519
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(gdb) next
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(gdb) p dbug_print_table_row(info->table)
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$3 = 0x555557adcb20 <dbug_print_row_buff> "t1(a,b)=(1,yksi)"
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This worked until this patch:
commit e1e1e50bbaf3fd96ac0b5ca4fcd28a458132e9bd
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Author: Aleksey Midenkov <midenok@gmail.com>
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Date: Mon Jan 13 15:40:59 2025 +0300
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MDEV-35343 DML debug logging
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After that, I get empty rows printed:
$6 = 0x7fff180665c0 "t1()=()"
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The columns are not printed because the above patch makes the print out function think no columns are in the read set.
- is caused by
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MDEV-35343
unexpected replace behaviour when long unique index on system versioned table
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-
Closed
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