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4edea18f8d
metadata"
Improved error handling such that queries against Information_Schema.Tables won't
fail if a federated table can't make a remote connection.
mysql-test/r/merge.result:
Updated with warnings that were previously masked.
mysql-test/r/show_check.result:
Updated with warnings that were previously masked.
mysql-test/r/view.result:
Updated with warnings that were previously masked.
sql/sql_show.cc:
If get_schema_tables_record() encounters an error, push a warning,
set the TABLE COMMENT column with the error text, and clear the
error so that the operation can continue.
67 lines
2.7 KiB
Text
67 lines
2.7 KiB
Text
#
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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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CREATE DATABASE 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 BASE TABLE FEDERATED NULL 0 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 federated;
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DROP TABLE IF EXISTS federated.t1;
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DROP DATABASE federated;
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