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30cd549e3b
Main problem: mysql 5.1 cannot read binlogs from 4.1. Subproblem 1: There is a mistake in sql_ex_info::init. The read_str() function updates its first argument to point to the next character to read. However, it is applied only to a copy of the buffer pointer, so the real buffer pointer is not updated. Fix 1: do not take a copy of the buffer pointer. The copy was needed because sql_ex_info::init does not use the const attribute on some of its arguments. So we add the const attribute, too. Subproblem 2: The first BINLOG statement is asserted to be a FORMAT_DESCRIPTION_LOG_EVENT, but 4.1 binlogs begin with START_EVENT_V3. Fix 2: allow START_EVENT_V3 too.
71 lines
1.3 KiB
Text
71 lines
1.3 KiB
Text
DROP TABLE IF EXISTS t1, t2, t3;
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==== Read modern binlog (version 5.1.23) ====
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SELECT * FROM t1 ORDER BY a;
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a b
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0 last_insert_id
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1 one
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3 last stm in trx: next event should be xid
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4 four
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674568 random
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SELECT * FROM t2 ORDER BY a;
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a b
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3 first stm in trx
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SELECT COUNT(*) FROM t3;
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COUNT(*)
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17920
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DROP TABLE t1, t2, t3;
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==== Read binlog from version 5.1.17 ====
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SELECT * FROM t1 ORDER BY a;
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a b
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0 last_insert_id
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1 one
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3 last stm in trx: next event should be xid
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4 four
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764247 random
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SELECT * FROM t2 ORDER BY a;
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a b
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3 first stm in trx
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SELECT COUNT(*) FROM t3;
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COUNT(*)
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17920
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DROP TABLE t1, t2, t3;
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==== Read binlog from version 4.1 ====
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SELECT * FROM t1 ORDER BY a;
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a b
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0 last_insert_id
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4 four
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190243 random
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SELECT COUNT(*) FROM t3;
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COUNT(*)
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17920
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DROP TABLE t1, t3;
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==== Read binlog from alcatel tree (mysql-5.1-wl2325-5.0-drop6) ====
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SELECT * FROM t1 ORDER BY a;
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a b
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0 last_insert_id
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1 one
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3 last stm in trx: next event should be xid
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4 four
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781729 random
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SELECT * FROM t2 ORDER BY a;
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a b
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3 first stm in trx
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SELECT COUNT(*) FROM t3;
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COUNT(*)
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17920
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DROP TABLE t1, t2, t3;
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==== Read binlog from ndb tree (mysql-5.1-telco-6.1) ====
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SELECT * FROM t1 ORDER BY a;
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a b
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0 last_insert_id
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1 one
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3 last stm in trx: next event should be xid
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4 four
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703356 random
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SELECT * FROM t2 ORDER BY a;
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a b
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3 first stm in trx
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SELECT COUNT(*) FROM t3;
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COUNT(*)
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17920
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DROP TABLE t1, t2, t3;
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