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Since the commit where it was added, main.information_schema_tables fails sporadically in buildbot and outside.
With ps-protocol it's easily reproducible, run the test with --repeat, it fails within a few attempts:
main.information_schema_tables [ fail ]
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Test ended at 2022-04-24 21:28:02
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CURRENT_TEST: main.information_schema_tables
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mysqltest: At line 28: query 'SELECT v.* FROM v JOIN INFORMATION_SCHEMA.TABLES WHERE DATA_LENGTH = -1' failed: 1615: Prepared statement needs to be re-prepared
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The result from queries just before the failure was:
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< snip >
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#
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#
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# MDEV-25243 ASAN heap-use-after-free in Item_func_sp::execute_impl upon concurrent view DDL and I_S query with view and function
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#
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# The originally reported non-deterministic test.
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# It did not fail reliably on every run.
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CREATE TABLE t (a INT);
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INSERT INTO t VALUES (1),(2);
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CREATE FUNCTION f(b INT) RETURNS INT RETURN 1;
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CREATE VIEW v AS SELECT f(SUM(a)) FROM t;
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connect con1,localhost,root,,test;
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LOOP
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CREATE OR REPLACE VIEW vv AS SELECT 1;
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END LOOP $
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connection default;
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SELECT v.* FROM v JOIN INFORMATION_SCHEMA.TABLES WHERE DATA_LENGTH = -1;
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In was also seen to fail in buildbot in the normal mode, but it seems much less likely:
main.information_schema_tables w3 [ fail ]
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Test ended at 2022-04-24 10:46:58
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CURRENT_TEST: main.information_schema_tables
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--- /mnt/buildbot/build/mariadb-10.2.44/mysql-test/r/information_schema_tables.result 2022-04-24 09:49:39.000000000 -0400
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+++ /mnt/buildbot/build/mariadb-10.2.44/mysql-test/r/information_schema_tables.reject 2022-04-24 10:46:58.795856264 -0400
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@@ -21,6 +21,8 @@
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disconnect con1;
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connection default;
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DROP VIEW IF EXISTS vv;
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+Warnings:
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+Note 1051 Unknown table 'test.vv'
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DROP VIEW v;
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DROP FUNCTION f;
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DROP TABLE t;
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mysqltest: Result length mismatch
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