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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10.3(EOL), 10.4(EOL), 10.5, 10.6, 10.7(EOL), 10.8(EOL), 10.9(EOL), 10.10(EOL), 10.11, 11.0(EOL)
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None
Description
If ALTER is performed with COPY algorithm (explicitly or implicitly) on a CONNECT table with (potentially) multiple underlying files, the contents of the underlying file gets duplicated.
Maybe it would be happening for non-multiple tables too, but MDEV-30909 (COPY algorithm is not supported) doesn't allow to check it.
INSTALL SONAME 'ha_connect'; |
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let $MYSQLD_DATADIR= `select @@datadir`; |
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--write_file $MYSQLD_DATADIR/test/num1.csv
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1
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2
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EOF
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CREATE TABLE t (a int NOT NULL) ENGINE=CONNECT TABLE_TYPE=CSV FILE_NAME='num?.csv' MULTIPLE=1; |
SELECT * FROM t; |
ALTER TABLE t FORCE; |
SELECT * FROM t; |
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ALTER TABLE t FORCE, ALGORITHM=COPY; |
SELECT * FROM t; |
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--echo # File contents
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--cat_file $MYSQLD_DATADIR/test/num1.csv
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# Cleanup
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DROP TABLE t; |
UNINSTALL SONAME 'ha_connect'; |
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10.4 ff3d4395 |
ALTER TABLE t FORCE; |
Warnings:
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Warning 1105 This is an outward table, table data were not modified. |
SELECT * FROM t; |
a
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1
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2
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ALTER TABLE t FORCE, ALGORITHM=COPY; |
SELECT * FROM t; |
a
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1
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2
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1
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2
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# File contents
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1
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2
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1
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2
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