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e199c7cd17
Improved error handling such that queries against Information_Schema.Tables won't fail if a Federated table is unable to connect to remote host. sql/sql_show.cc: If Handler::Info() fails, save error text in TABLE COMMENTS column, clear error.
77 lines
2.9 KiB
Plaintext
77 lines
2.9 KiB
Plaintext
#
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# Bug 35333 "If a Federated table can't connect to the remote hose, can't retrieve metadata"
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#
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# Queries such as SHOW TABLE STATUS and SELECT * FROM INFORMATION_SCHEMA.TABLES fail
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# when encountering a federated table that cannot connect to its remote table.
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#
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# The fix is to store the error text in the TABLE COMMENTS column of I_S.TABLES, clear
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# the remote connection error and push a warning instead. This allows the SELECT operation
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# to complete while still indicating a problem. This fix applies to any non-fatal system
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# error that occurs during a query against I_S.TABLES.de
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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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DROP DATABASE IF EXISTS federated;
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CREATE DATABASE federated;
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DROP DATABASE IF EXISTS federated;
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CREATE DATABASE federated;
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CREATE DATABASE IF NOT EXISTS realdb;
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DROP TABLE IF EXISTS realdb.t0;
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DROP TABLE IF EXISTS federated.t0;
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#
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# Create the base table to be referenced
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#
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CREATE TABLE realdb.t0 (a text, b text) ENGINE=MYISAM;
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#
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# Create a federated table with a bogus port number
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#
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CREATE TABLE federated.t0 (a text, b text) ENGINE=FEDERATED
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CONNECTION='mysql://root@127.0.0.1:63333/realdb/t0';
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#
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# Trigger a federated system error during a INFORMATION_SCHEMA.TABLES query
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#
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SELECT TABLE_SCHEMA, TABLE_NAME, TABLE_TYPE, ENGINE, ROW_FORMAT, TABLE_ROWS, DATA_LENGTH, TABLE_COMMENT
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FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'realdb' or TABLE_SCHEMA = 'federated';
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TABLE_SCHEMA TABLE_NAME TABLE_TYPE ENGINE ROW_FORMAT TABLE_ROWS DATA_LENGTH TABLE_COMMENT
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federated t0 NULL NULL NULL NULL Unable to connect to foreign data source: Can't connect to MySQL server on '127.
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realdb t0 BASE TABLE MyISAM Dynamic 0 0
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Warnings:
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Warning 1429 Unable to connect to foreign data source: Can't connect to MySQL server on '127.0.0.1' (socket errno)
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SHOW WARNINGS;
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Level Code Message
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Warning 1429 Unable to connect to foreign data source: Can't connect to MySQL server on '127.0.0.1' (socket errno)
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#
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# Create a MyISAM table then corrupt the file
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#
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USE realdb;
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CREATE TABLE t1 (c1 int) ENGINE=MYISAM;
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#
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# Corrupt the MyISAM table by deleting the base file
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#
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#
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# Trigger a MyISAM system error during an INFORMATION_SCHEMA.TABLES query
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#
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SELECT TABLE_SCHEMA, TABLE_NAME, TABLE_TYPE, ENGINE, ROW_FORMAT, TABLE_ROWS, DATA_LENGTH, TABLE_COMMENT
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FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = 't1';
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TABLE_SCHEMA TABLE_NAME TABLE_TYPE ENGINE ROW_FORMAT TABLE_ROWS DATA_LENGTH TABLE_COMMENT
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realdb t1 BASE TABLE NULL NULL NULL NULL Can't find file: 't1' (errno: 2)
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Warnings:
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Warning 1017 Can't find file: 't1' (errno: 2)
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SHOW WARNINGS;
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Level Code Message
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Warning 1017 Can't find file: 't1' (errno: 2)
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#
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# Cleanup
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#
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DROP TABLE IF EXISTS realdb.t0;
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DROP TABLE IF EXISTS federated.t0;
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DROP DATABASE realdb;
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DROP TABLE IF EXISTS federated.t1;
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DROP DATABASE IF EXISTS federated;
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DROP TABLE IF EXISTS federated.t1;
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DROP DATABASE IF EXISTS federated;
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