Details
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Bug
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    Status: Closed (View Workflow)
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Major
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    Resolution: Not a Bug
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    10.2.6, 10.2(EOL)
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    None
 
Description
The following table can be created in MariaDB 10.1.22:
					CREATE TABLE `a10` (
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					  `id` int(11) NOT NULL,
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					  `v1` varchar(10) DEFAULT NULL,
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					  `v2` varchar(10) DEFAULT NULL,
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					[...]
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					  `v728` varchar(10) DEFAULT NULL,
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					  `v729` varchar(10) DEFAULT NULL,
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					  PRIMARY KEY (`id`)
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					) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=COMPACT;
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With MariaDB 10.2.6 this fails with
					ERROR 1118 (42000) at line 2: Row size too large (> 8126). Changing some columns to TEXT or BLOB or using ROW_FORMAT=DYNAMIC or ROW_FORMAT=COMPRESSED may help. In current row format, BLOB prefix of 768 bytes is stored inline.
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When removing one of the VARCHAR(10) lines creating the table succeeds.
When using ROW_FORMAT=COMPRESSED and innodb_file_format=Baracuda instead of Antelope creating the table still fails, now with
					ERROR 1118 (42000) at line 2: Row size too large (> 8126). Changing some columns to TEXT or BLOB may help. In current row format, BLOB prefix of 0 bytes is stored inline.
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Again, when removing one of the VARCHAR(10) columns the CREATE succeeds.
With MariaDB 10.1.22 and ROW_FORMAT=COMPACT the CREATE even succeeds with 1000 VARCHAR(10) columns.
I assume that this difference is caused by our switch from XtraDB to InnoDB, as I ran into this with MySQL 5.6 earlier: https://bugs.mysql.com/bug.php?id=76793
I reported