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https://github.com/MariaDB/server.git
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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.
206 lines
4.9 KiB
Text
206 lines
4.9 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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stop slave;
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create table t1(n int not null auto_increment primary key);
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insert into t1 values (1),(2),(3),(4);
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drop table t1;
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create table t2(n int not null auto_increment primary key);
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insert into t2 values (1),(2);
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insert into t2 values (3),(4);
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drop table t2;
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start slave until master_log_file='master-bin.000001', master_log_pos=311;
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select * from t1;
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n
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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 SLAVE STATUS;
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Slave_IO_State #
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Master_Host 127.0.0.1
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Master_User root
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Master_Port MASTER_PORT
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Connect_Retry 1
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Master_Log_File master-bin.000001
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Read_Master_Log_Pos 750
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Relay_Log_File #
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Relay_Log_Pos #
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Relay_Master_Log_File master-bin.000001
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Slave_IO_Running Yes
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Slave_SQL_Running No
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Replicate_Do_DB
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Replicate_Ignore_DB
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Replicate_Do_Table
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Replicate_Ignore_Table #
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Replicate_Wild_Do_Table
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Replicate_Wild_Ignore_Table
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Last_Errno 0
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Last_Error
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Skip_Counter 0
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Exec_Master_Log_Pos 317
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Relay_Log_Space #
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Until_Condition Master
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Until_Log_File master-bin.000001
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Until_Log_Pos 311
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Master_SSL_Allowed No
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Master_SSL_CA_File
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Master_SSL_CA_Path
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Master_SSL_Cert
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Master_SSL_Cipher
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Master_SSL_Key
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Seconds_Behind_Master #
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Master_SSL_Verify_Server_Cert No
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Last_IO_Errno #
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Last_IO_Error #
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Last_SQL_Errno 0
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Last_SQL_Error
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start slave until master_log_file='master-no-such-bin.000001', master_log_pos=291;
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select * from t1;
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n
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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 SLAVE STATUS;
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Slave_IO_State #
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Master_Host 127.0.0.1
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Master_User root
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Master_Port MASTER_PORT
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Connect_Retry 1
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Master_Log_File master-bin.000001
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Read_Master_Log_Pos 750
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Relay_Log_File #
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Relay_Log_Pos #
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Relay_Master_Log_File master-bin.000001
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Slave_IO_Running Yes
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Slave_SQL_Running No
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Replicate_Do_DB
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Replicate_Ignore_DB
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Replicate_Do_Table
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Replicate_Ignore_Table #
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Replicate_Wild_Do_Table
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Replicate_Wild_Ignore_Table
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Last_Errno 0
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Last_Error
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Skip_Counter 0
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Exec_Master_Log_Pos 317
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Relay_Log_Space #
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Until_Condition Master
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Until_Log_File master-no-such-bin.000001
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Until_Log_Pos 291
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Master_SSL_Allowed No
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Master_SSL_CA_File
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Master_SSL_CA_Path
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Master_SSL_Cert
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Master_SSL_Cipher
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Master_SSL_Key
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Seconds_Behind_Master #
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Master_SSL_Verify_Server_Cert No
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Last_IO_Errno #
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Last_IO_Error #
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Last_SQL_Errno 0
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Last_SQL_Error
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start slave until relay_log_file='slave-relay-bin.000004', relay_log_pos=728;
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select * from t2;
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n
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1
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2
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SHOW SLAVE STATUS;
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Slave_IO_State #
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Master_Host 127.0.0.1
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Master_User root
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Master_Port MASTER_PORT
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Connect_Retry 1
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Master_Log_File master-bin.000001
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Read_Master_Log_Pos 750
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Relay_Log_File #
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Relay_Log_Pos #
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Relay_Master_Log_File master-bin.000001
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Slave_IO_Running Yes
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Slave_SQL_Running No
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Replicate_Do_DB
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Replicate_Ignore_DB
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Replicate_Do_Table
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Replicate_Ignore_Table #
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Replicate_Wild_Do_Table
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Replicate_Wild_Ignore_Table
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Last_Errno 0
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Last_Error
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Skip_Counter 0
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Exec_Master_Log_Pos 594
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Relay_Log_Space #
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Until_Condition Relay
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Until_Log_File slave-relay-bin.000004
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Until_Log_Pos 728
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Master_SSL_Allowed No
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Master_SSL_CA_File
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Master_SSL_CA_Path
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Master_SSL_Cert
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Master_SSL_Cipher
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Master_SSL_Key
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Seconds_Behind_Master #
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Master_SSL_Verify_Server_Cert No
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Last_IO_Errno #
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Last_IO_Error #
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Last_SQL_Errno 0
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Last_SQL_Error
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start slave;
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stop slave;
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start slave until master_log_file='master-bin.000001', master_log_pos=740;
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SHOW SLAVE STATUS;
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Slave_IO_State #
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Master_Host 127.0.0.1
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Master_User root
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Master_Port MASTER_PORT
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Connect_Retry 1
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Master_Log_File master-bin.000001
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Read_Master_Log_Pos 750
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Relay_Log_File #
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Relay_Log_Pos #
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Relay_Master_Log_File master-bin.000001
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Slave_IO_Running Yes
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Slave_SQL_Running No
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Replicate_Do_DB
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Replicate_Ignore_DB
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Replicate_Do_Table
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Replicate_Ignore_Table #
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Replicate_Wild_Do_Table
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Replicate_Wild_Ignore_Table
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Last_Errno 0
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Last_Error
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Skip_Counter 0
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Exec_Master_Log_Pos 750
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Relay_Log_Space #
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Until_Condition Master
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Until_Log_File master-bin.000001
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Until_Log_Pos 740
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Master_SSL_Allowed No
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Master_SSL_CA_File
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Master_SSL_CA_Path
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Master_SSL_Cert
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Master_SSL_Cipher
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Master_SSL_Key
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Seconds_Behind_Master #
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Master_SSL_Verify_Server_Cert No
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Last_IO_Errno #
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Last_IO_Error #
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Last_SQL_Errno 0
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Last_SQL_Error
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start slave until master_log_file='master-bin', master_log_pos=561;
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ERROR HY000: Incorrect parameter or combination of parameters for START SLAVE UNTIL
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start slave until master_log_file='master-bin.000001', master_log_pos=561, relay_log_pos=12;
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ERROR HY000: Incorrect parameter or combination of parameters for START SLAVE UNTIL
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start slave until master_log_file='master-bin.000001';
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ERROR HY000: Incorrect parameter or combination of parameters for START SLAVE UNTIL
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start slave until relay_log_file='slave-relay-bin.000002';
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ERROR HY000: Incorrect parameter or combination of parameters for START SLAVE UNTIL
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start slave until relay_log_file='slave-relay-bin.000002', master_log_pos=561;
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ERROR HY000: Incorrect parameter or combination of parameters for START SLAVE UNTIL
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start slave sql_thread;
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start slave until master_log_file='master-bin.000001', master_log_pos=740;
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Warnings:
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Note 1254 Slave is already running
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