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6dff801284
LOAD_FILE
LOAD_FILE is not safe to replicate in STATEMENT mode, because it
depends on a file (which is loaded on master and may not exist in
slave(s)). This leads to scenarios on which the slave replicates the
statement with 'load_file' and it will try to load the file from local
file system. Given that the file may not exist in the slave filesystem
the operation will not succeed (probably returning NULL), causing
master and slave(s) to diverge. However, when using MIXED mode
replication, this can be made to work, if the statement including
LOAD_FILE is marked as unsafe, triggering a switch to ROW mode,
meaning that the contents of the file are written to binlog as row
events. Consequently, the contents from the file in the master will
reach the slave via the binlog.
This patch addresses this bug by marking the load_file function as
unsafe. When in mixed mode and when LOAD_FILE is issued, there will be
a switch to row mode. Furthermore, when in statement mode, the
LOAD_FILE will raise a warning that the statement is unsafe in that
mode.
245 lines
2.9 KiB
Text
245 lines
2.9 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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DROP PROCEDURE IF EXISTS test.p1;
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DROP TABLE IF EXISTS test.t1;
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CREATE TABLE test.t1 (a INT, blob_column LONGBLOB, PRIMARY KEY(a));
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INSERT INTO test.t1 VALUES(1,'test');
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UPDATE test.t1 SET blob_column=LOAD_FILE('../../std_data/words2.dat') WHERE a=1;
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create procedure test.p1()
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begin
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INSERT INTO test.t1 VALUES(2,'test');
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UPDATE test.t1 SET blob_column=LOAD_FILE('../../std_data/words2.dat') WHERE a=2;
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end|
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CALL test.p1();
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SELECT * FROM test.t1 ORDER BY blob_column;
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a blob_column
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1 abase
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abased
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abasement
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abasements
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abases
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abash
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abashed
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abashes
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abashing
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abasing
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abate
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abated
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abatement
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abatements
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abater
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abates
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abating
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Abba
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abbe
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abbey
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abbeys
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abbot
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abbots
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Abbott
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abbreviate
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abbreviated
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abbreviates
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abbreviating
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abbreviation
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abbreviations
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Abby
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abdomen
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abdomens
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abdominal
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abduct
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abducted
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abduction
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abductions
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abductor
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abductors
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abducts
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Abe
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abed
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Abel
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Abelian
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Abelson
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Aberdeen
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Abernathy
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aberrant
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aberration
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2 abase
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abased
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abasement
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abasements
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abases
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abash
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abashed
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abashes
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abashing
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abasing
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abate
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abated
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abatement
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abatements
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abater
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abates
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abating
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Abba
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abbe
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abbey
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abbeys
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abbot
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abbots
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Abbott
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abbreviate
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abbreviated
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abbreviates
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abbreviating
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abbreviation
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abbreviations
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Abby
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abdomen
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abdomens
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abdominal
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abduct
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abducted
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abduction
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abductions
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abductor
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abductors
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abducts
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Abe
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abed
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Abel
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Abelian
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Abelson
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Aberdeen
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Abernathy
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aberrant
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aberration
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SELECT * FROM test.t1 ORDER BY blob_column;
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a blob_column
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1 abase
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abased
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abasement
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abasements
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abases
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abash
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abashed
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abashes
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abashing
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abasing
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abate
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abated
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abatement
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abatements
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abater
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abates
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abating
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Abba
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abbe
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abbey
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abbeys
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abbot
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abbots
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Abbott
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abbreviate
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abbreviated
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abbreviates
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abbreviating
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abbreviation
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abbreviations
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Abby
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abdomen
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abdomens
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abdominal
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abduct
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abducted
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abduction
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abductions
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abductor
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abductors
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abducts
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Abe
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abed
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Abel
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Abelian
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Abelson
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Aberdeen
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Abernathy
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aberrant
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aberration
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2 abase
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abased
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abasement
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abasements
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abases
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abash
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abashed
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abashes
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abashing
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abasing
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abate
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abated
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abatement
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abatements
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abater
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abates
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abating
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Abba
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abbe
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abbey
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abbeys
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abbot
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abbots
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Abbott
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abbreviate
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abbreviated
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abbreviates
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abbreviating
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abbreviation
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abbreviations
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Abby
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abdomen
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abdomens
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abdominal
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abduct
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abducted
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abduction
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abductions
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abductor
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abductors
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abducts
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Abe
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abed
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Abel
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Abelian
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Abelson
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Aberdeen
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Abernathy
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aberrant
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aberration
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DROP PROCEDURE IF EXISTS test.p1;
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DROP TABLE test.t1;
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**** Resetting master and slave ****
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include/stop_slave.inc
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RESET SLAVE;
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RESET MASTER;
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include/start_slave.inc
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SELECT repeat('x',20) INTO OUTFILE 'MYSQLTEST_VARDIR/tmp/bug_39701.data';
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DROP TABLE IF EXISTS t1;
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CREATE TABLE t1 (t text);
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CREATE PROCEDURE p(file TEXT)
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BEGIN
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INSERT INTO t1 VALUES (LOAD_FILE(file));
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END|
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include/stop_slave.inc
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CALL p('MYSQLTEST_VARDIR/tmp/bug_39701.data');
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include/start_slave.inc
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Comparing tables master:test.t1 and slave:test.t1
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DROP TABLE t1;
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DROP PROCEDURE p;
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