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Alvaro Herrera 7516f52594 BRIN: Block Range Indexes ... BRIN is a new index access method intended to accelerate scans of very large tables, without the maintenance overhead of btrees or other traditional indexes. They work by maintaining "summary" data about block ranges. Bitmap index scans work by reading each summary tuple and comparing them with the query quals; all pages in the range are returned in a lossy TID bitmap if the quals are consistent with the values in the summary tuple, otherwise not. Normal index scans are not supported because these indexes do not store TIDs. As new tuples are added into the index, the summary information is updated (if the block range in which the tuple is added is already summarized) or not; in the latter case, a subsequent pass of VACUUM or the brin_summarize_new_values() function will create the summary information. For data types with natural 1-D sort orders, the summary info consists of the maximum and the minimum values of each indexed column within each page range. This type of operator class we call "Minmax", and we supply a bunch of them for most data types with B-tree opclasses. Since the BRIN code is generalized, other approaches are possible for things such as arrays, geometric types, ranges, etc; even for things such as enum types we could do something different than minmax with better results. In this commit I only include minmax. Catalog version bumped due to new builtin catalog entries. There's more that could be done here, but this is a good step forwards. Loosely based on ideas from Simon Riggs; code mostly by Álvaro Herrera, with contribution by Heikki Linnakangas. Patch reviewed by: Amit Kapila, Heikki Linnakangas, Robert Haas. Testing help from Jeff Janes, Erik Rijkers, Emanuel Calvo. PS: The research leading to these results has received funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement n° 318633.		11 years ago
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Makefile	BRIN: Block Range Indexes	11 years ago
brinfuncs.c	BRIN: Block Range Indexes	11 years ago
btreefuncs.c	Create function prototype as part of PG_FUNCTION_INFO_V1 macro	12 years ago
fsmfuncs.c	Create function prototype as part of PG_FUNCTION_INFO_V1 macro	12 years ago
heapfuncs.c	Create function prototype as part of PG_FUNCTION_INFO_V1 macro	12 years ago
pageinspect--1.0--1.1.sql	Fix typos in some error messages thrown by extension scripts when fed to psql.	12 years ago
pageinspect--1.1--1.2.sql	Fix typos in some error messages thrown by extension scripts when fed to psql.	12 years ago
pageinspect--1.2--1.3.sql	BRIN: Block Range Indexes	11 years ago
pageinspect--1.3.sql	BRIN: Block Range Indexes	11 years ago
pageinspect--unpackaged--1.0.sql	Fix typos in some error messages thrown by extension scripts when fed to psql.	12 years ago
pageinspect.control	BRIN: Block Range Indexes	11 years ago
rawpage.c	Check block number against the correct fork in get_raw_page().	12 years ago