Details
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Bug
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Status: Open (View Workflow)
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Major
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Resolution: Unresolved
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10.5, 10.6, 10.11, 10.3(EOL), 10.4(EOL), 10.7(EOL), 10.8(EOL), 10.9(EOL), 10.10(EOL)
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None
Description
If to add the statement
SELECT * |
INTO OUTFILE '/tmp/t1.txt' |
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\r\n' |
FROM t1; |
to the test case for the bug "Bug#5382 'explain select into outfile' crashes the server" from outfile.test
then execution of ./mtr main.outfile fails as follows:
main.outfile [ fail ]
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Test ended at 2022-11-16 21:57:57
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CURRENT_TEST: main.outfile
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mysqltest: At line 70: query 'SELECT *
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INTO OUTFILE '/tmp/t1.txt'
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FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\r\n'
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FROM t1' failed: 1290: The MariaDB server is running with the --secure-file-priv option so it cannot execute this statement
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The result from queries just before the failure was:
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< snip >
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select load_file(concat(@tmpdir,"/outfile-test.not-exist"));
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load_file(concat(@tmpdir,"/outfile-test.not-exist"))
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NULL
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drop table t1;
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select load_file(concat(@tmpdir,"/outfile-test.4"));
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load_file(concat(@tmpdir,"/outfile-test.4"))
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1
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CREATE TABLE t1 (a INT);
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EXPLAIN
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SELECT *
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INTO OUTFILE '/tmp/t1.txt'
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FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\r\n'
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FROM t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 system NULL NULL NULL NULL 0 Const row not found
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SELECT *
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INTO OUTFILE '/tmp/t1.txt'
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FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\r\n'
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FROM t1;
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One can see that EXPLAIN just does not report an error that it should report as it the error is encountered at the prepare phase in JOIN::prepare().
This is a consequence of a serious defect of the code that processes EXPLAIN for those variants of SELECT that employ classes whose prepare virtual method differs from the method of select_result::prepare().