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MDEV-35343 DML debug logging

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Usage:

mtr --mysqld=--debug=d,dml,query:i:o,/tmp/dml.log

Example output:

T@6    : dispatch_command: query: insert into t1 values ('a')
T@6    : handler::ha_write_row: exit: INSERT: t1(a) = 0
T@6    : dispatch_command: query: alter ignore table t1 add unique index (data)
T@6    : handler::ha_write_row: exit: INSERT: t1(a) = 0
T@6    : dispatch_command: query: alter ignore table t1 add unique index (data)
T@6    : handler::ha_write_row: exit: INSERT: t1(a) = 0

T@6    : dispatch_command: query: replace into t1 values ('b'), ('c'), ('a'), ('b')
T@6    : handler::ha_write_row: exit: INSERT: t1(b) = 0
T@6    : handler::ha_write_row: exit: INSERT: t1(c) = 0
T@6    : handler::ha_write_row: exit: INSERT: t1(a) = 121
T@6    : write_record: exit: DELETE: t1(a) = 0
T@6    : handler::ha_write_row: exit: INSERT: t1(a) = 0
T@6    : handler::ha_write_row: exit: INSERT: t1(b) = 121
T@6    : write_record: exit: DELETE: t1(b) = 0
T@6    : handler::ha_write_row: exit: INSERT: t1(b) = 0
This commit is contained in:
Aleksey Midenkov
2025-01-13 15:40:59 +03:00
parent e760a6dc1c
commit e1e1e50bba
3 changed files with 46 additions and 32 deletions
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4
sql/handler.cc
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@ -7350,6 +7350,7 @@ int handler::ha_write_row(const uchar *buf)
TABLE_IO_WAIT(tracker, PSI_TABLE_WRITE_ROW, MAX_KEY, error,
{ error= write_row(buf); })
DBUG_PRINT("dml", ("INSERT: %s = %d", dbug_print_row(table, buf, false), error));
MYSQL_INSERT_ROW_DONE(error);
if (likely(!error))
@ -7410,6 +7411,8 @@ int handler::ha_update_row(const uchar *old_data, const uchar *new_data)
TABLE_IO_WAIT(tracker, PSI_TABLE_UPDATE_ROW, active_index, 0,
{ error= update_row(old_data, new_data);})
DBUG_PRINT("dml", ("UPDATE: %s => %s = %d", dbug_print_row(table, old_data, false),
dbug_print_row(table, new_data, false), error));
MYSQL_UPDATE_ROW_DONE(error);
if (likely(!error))
@ -7489,6 +7492,7 @@ int handler::ha_delete_row(const uchar *buf)
TABLE_IO_WAIT(tracker, PSI_TABLE_DELETE_ROW, active_index, error,
{ error= delete_row(buf);})
DBUG_PRINT("dml", ("DELETE: %s = %d", dbug_print_row(table, buf, false), error));
MYSQL_DELETE_ROW_DONE(error);
if (likely(!error))
{