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Minor improvements to the TODO list. Add some URLs for some

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existing TODO items, and re-add a TODO item for an "estimated
count" capability.
This commit is contained in:
Neil Conway
2007-01-16 20:58:38 +00:00
parent 6959cb5957
commit da07c81fe3
1 changed files with 13 additions and 1 deletions
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@@ -341,7 +341,7 @@ Functions
* Add ISO day of week format 'ID' to to_char() where Monday = 1 * Add ISO day of week format 'ID' to to_char() where Monday = 1
* Add a field 'isoyear' to extract(), based on the ISO week * Add a field 'isoyear' to extract(), based on the ISO week
* Add SPI_gettypmod() to return the typemod for a TupleDesc * Add SPI_gettypmod() to return the typemod for a TupleDesc
* Allow inlining of set-returning functions * Implement inlining of set-returning functions defined in SQL
* Allow SQL-language functions to return results from RETURNING queries * Allow SQL-language functions to return results from RETURNING queries
@@ -928,6 +928,8 @@ Indexes
several hash buckets could be stored on a single page and greater several hash buckets could be stored on a single page and greater
granularity used for the hash algorithm. granularity used for the hash algorithm.
http://archives.postgresql.org/pgsql-hackers/2004-06/msg00168.php
o Consider sorting hash buckets so entries can be found using a o Consider sorting hash buckets so entries can be found using a
binary search, rather than a linear scan binary search, rather than a linear scan
@@ -972,6 +974,13 @@ Cache Usage
faster than a sequential scan it must avoid access to the heap faster than a sequential scan it must avoid access to the heap
to obtain tuple visibility information. to obtain tuple visibility information.
* Provide a way to calculate an "estimated COUNT(*)"
Perhaps by using the optimizer's cardinality estimates or random
sampling.
http://archives.postgresql.org/pgsql-hackers/2005-11/msg00943.php
* Allow data to be pulled directly from indexes * Allow data to be pulled directly from indexes
Currently indexes do not have enough tuple visibility information Currently indexes do not have enough tuple visibility information
@@ -1075,6 +1084,9 @@ Locking
* Fix priority ordering of read and write light-weight locks (Neil) * Fix priority ordering of read and write light-weight locks (Neil)
http://archives.postgresql.org/pgsql-hackers/2004-11/msg00893.php
http://archives.postgresql.org/pgsql-hackers/2004-11/msg00905.php
Startup Time Improvements Startup Time Improvements
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