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0697ee265f
Keep track of how many pending XIDs (transactions that are prepared in storage engine and written into binlog, but not yet durably committed on disk in the engine) there are in each binlog. When the count of one binlog drops to zero, write a new binlog checkpoint event, telling which is the oldest binlog with pending XIDs. When doing XA recovery after a crash, check the last binlog checkpoint event, and scan all binlog files from that point onwards for XIDs that must be committed if found in prepared state inside engine. Remove the code in binlog rotation that waits for all prepared XIDs to be committed before writing a new binlog file (this is no longer necessary when recovery can scan multiple binlog files).
28 lines
885 B
Text
28 lines
885 B
Text
set global storage_engine=aria;
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set session storage_engine=aria;
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drop table if exists t1;
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SET SQL_WARNINGS=1;
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RESET MASTER;
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set binlog_format=statement;
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CREATE TABLE t1 (a int primary key);
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insert t1 values (1),(2),(3);
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insert t1 values (4),(2),(5);
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ERROR 23000: Duplicate entry '2' for key 'PRIMARY'
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select * from t1;
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a
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1
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2
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3
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4
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SHOW BINLOG EVENTS FROM <start_pos>;
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Log_name Pos Event_type Server_id End_log_pos Info
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master-bin.000001 # Binlog_checkpoint 1 # master-bin.000001
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master-bin.000001 # Query 1 # use `test`; CREATE TABLE t1 (a int primary key)
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master-bin.000001 # Query 1 # BEGIN
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master-bin.000001 # Query 1 # use `test`; insert t1 values (1),(2),(3)
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master-bin.000001 # Query 1 # COMMIT
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master-bin.000001 # Query 1 # BEGIN
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master-bin.000001 # Query 1 # use `test`; insert t1 values (4),(2),(5)
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master-bin.000001 # Query 1 # COMMIT
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drop table t1;
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set binlog_format=default;
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