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Alexander Korotkov 87c21bb941 Implement ALTER TABLE ... SPLIT PARTITION ... command ... This new DDL command splits a single partition into several parititions. Just like ALTER TABLE ... MERGE PARTITIONS ... command, new patitions are created using createPartitionTable() function with parent partition as the template. This commit comprises quite naive implementation which works in single process and holds the ACCESS EXCLUSIVE LOCK on the parent table during all the operations including the tuple routing. This is why this new DDL command can't be recommended for large partitioned tables under a high load. However, this implementation come in handy in certain cases even as is. Also, it could be used as a foundation for future implementations with lesser locking and possibly parallel. Discussion: https://postgr.es/m/c73a1746-0cd0-6bdd-6b23-3ae0b7c0c582%40postgrespro.ru Author: Dmitry Koval Reviewed-by: Matthias van de Meent, Laurenz Albe, Zhihong Yu, Justin Pryzby Reviewed-by: Alvaro Herrera, Robert Haas, Stephane Tachoires		2 years ago
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partbounds.h	Implement ALTER TABLE ... SPLIT PARTITION ... command	2 years ago
partdefs.h	Update copyright for 2024	2 years ago
partdesc.h	Update copyright for 2024	2 years ago
partprune.h	Update copyright for 2024	2 years ago