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				https://github.com/MariaDB/server.git
				synced 2025-11-03 20:36:16 +01:00 
			
		
		
		
	
		
			
				
	
	
		
			29 lines
		
	
	
	
		
			683 B
		
	
	
	
		
			Text
		
	
	
	
	
	
			
		
		
	
	
			29 lines
		
	
	
	
		
			683 B
		
	
	
	
		
			Text
		
	
	
	
	
	
connection node_2;
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connection node_1;
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CREATE TABLE t1 (id INT PRIMARY KEY) ENGINE=InnoDB;
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INSERT INTO t1 VALUES (1);
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connection node_2;
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FLUSH TABLE WITH READ LOCK;
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### This shouldn't block.
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FLUSH TABLES t1 FOR EXPORT;
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connection node_1;
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ALTER TABLE t1 ADD COLUMN f2 INTEGER;
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connection node_2;
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UNLOCK TABLES;
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### t1 should have column f2
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SHOW CREATE TABLE t1;
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Table	Create Table
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t1	CREATE TABLE `t1` (
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  `id` int(11) NOT NULL,
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  `f2` int(11) DEFAULT NULL,
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  PRIMARY KEY (`id`)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
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connection node_1;
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INSERT INTO t1 VALUES (2,3);
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connection node_2;
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SELECT * from t1;
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id	f2
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1	NULL
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2	3
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connection node_1;
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DROP TABLE t1;
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