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537c23e833
This patch adds the ability to store extra field metadata in the table map event. This data can include pack_length() or field_lenght() for fields such as CHAR or VARCHAR enabling developers to add code that can check for compatibilty between master and slave columns. More importantly, the extra field metadata can be used to store data from the master correctly should a VARCHAR field on the master be <= 255 bytes while the same field on the slave is > 255 bytes. The patch also includes the needed changes to unpack to ensure that data which is smaller on the master can be unpacked correctly on the slave. WL#3915 : (NDB) master's cols > slave Slave starts accepting and handling rows of master's tables which have more columns. The most important part of implementation is how to caclulate the amount of bytes to skip for unknown by slave column.
36 lines
1.4 KiB
Text
36 lines
1.4 KiB
Text
stop slave;
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drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
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reset master;
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reset slave;
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drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
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start slave;
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create table t1 (n int not null primary key);
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insert into t1 values (1);
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insert into t1 values (1);
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insert into t1 values (2),(3);
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select * from t1 ORDER BY n;
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n
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1
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2
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3
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drop table t1;
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create table t1(a int primary key);
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insert into t1 values (1),(2);
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delete from t1 where @@server_id=1;
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set sql_mode=strict_trans_tables;
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select @@server_id;
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@@server_id
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1
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insert into t1 values (1),(2),(3);
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select @@server_id;
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@@server_id
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2
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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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show slave status;
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Slave_IO_State Master_Host Master_User Master_Port Connect_Retry Master_Log_File Read_Master_Log_Pos Relay_Log_File Relay_Log_Pos Relay_Master_Log_File Slave_IO_Running Slave_SQL_Running Replicate_Do_DB Replicate_Ignore_DB Replicate_Do_Table Replicate_Ignore_Table Replicate_Wild_Do_Table Replicate_Wild_Ignore_Table Last_Errno Last_Error Skip_Counter Exec_Master_Log_Pos Relay_Log_Space Until_Condition Until_Log_File Until_Log_Pos Master_SSL_Allowed Master_SSL_CA_File Master_SSL_CA_Path Master_SSL_Cert Master_SSL_Cipher Master_SSL_Key Seconds_Behind_Master Master_SSL_Verify_Server_Cert Last_IO_Errno Last_IO_Error Last_SQL_Errno Last_SQL_Error
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# 127.0.0.1 root MASTER_PORT 1 master-bin.000001 786 # # master-bin.000001 Yes Yes 0 0 786 # None 0 No # No 0 0
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drop table t1;
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