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17.2.5.2 Evaluation of Table-Level Replication Options
The slave checks for and evaluates table options only if either of the following two conditions is true:
No matching database options were found.
One or more database options were found, and were evaluated to arrive at an “execute” condition according to the rules described in the previous section (see Section 17.2.5.1, “Evaluation of Database-Level Replication and Binary Logging Options”).
First, as a preliminary condition, the slave checks whether statement-based replication is enabled. If so, and the statement occurs within a stored function, the slave executes the statement and exits. If row-based replication is enabled, the slave does not know whether a statement occurred within a stored function on the master, so this condition does not apply.
For statement-based replication, replication events represent
statements (all changes making up a given event are associated
with a single SQL statement); for row-based replication, each
event represents a change in a single table row (thus a single
statement such as UPDATE mytable SET mycol =
1 may yield many row-based events). When viewed in
terms of events, the process of checking table options is the
same for both row-based and statement-based replication.
Having reached this point, if there are no table options, the
slave simply executes all events. If there are any
--replicate-do-table or
--replicate-wild-do-table
options, the event must match one of these if it is to be
executed; otherwise, it is ignored. If there are any
--replicate-ignore-table or
--replicate-wild-ignore-table
options, all events are executed except those that match any of
these options.
The following steps describe this evaluation in more detail. The starting point is the end of the evaluation of the database-level options, as described in Section 17.2.5.1, “Evaluation of Database-Level Replication and Binary Logging Options”.
Are there any table replication options?
Yes. Continue to step 2.
No. Execute the update and exit.
Which logging format is used?
STATEMENT. Carry out the remaining steps for each statement that performs an update.
ROW. Carry out the remaining steps for each update of a table row.
Are there any
--replicate-do-tableoptions?Yes. Does the table match any of them?
Yes. Execute the update and exit.
No. Continue to step 4.
No. Continue to step 4.
Are there any
--replicate-ignore-tableoptions?Yes. Does the table match any of them?
Yes. Ignore the update and exit.
No. Continue to step 5.
No. Continue to step 5.
Are there any
--replicate-wild-do-tableoptions?Yes. Does the table match any of them?
Yes. Execute the update and exit.
No. Continue to step 6.
No. Continue to step 6.
Are there any
--replicate-wild-ignore-tableoptions?Yes. Does the table match any of them?
Yes. Ignore the update and exit.
No. Continue to step 7.
No. Continue to step 7.
Is there another table to be tested?
Yes. Go back to step 3.
No. Continue to step 8.
Are there any
--replicate-do-tableor--replicate-wild-do-tableoptions?Yes. Ignore the update and exit.
No. Execute the update and exit.
Statement-based replication stops if a single SQL statement
operates on both a table that is included by a
--replicate-do-table or
--replicate-wild-do-table
option, and another table that is ignored by a
--replicate-ignore-table or
--replicate-wild-ignore-table
option. The slave must either execute or ignore the complete
statement (which forms a replication event), and it cannot
logically do this. This also applies to row-based replication
for DDL statements, because DDL statements are always logged
as statements, without regard to the logging format in effect.
The only type of statement that can update both an included
and an ignored table and still be replicated successfully is a
DML statement that has been logged with
binlog_format=ROW.
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Vielen Dank im Voraus.
Dokument erstellt 26/06/2006, zuletzt geändert 26/10/2018
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/mysql-rf-replication-rules-table-options.html
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