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