diff options
| author | Bruce Momjian <bruce@momjian.us> | 2019-05-22 11:22:13 -0400 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2019-05-22 11:22:13 -0400 |
| commit | 728840fe13acff7b03a4b1a813eeb8900ce5e469 (patch) | |
| tree | 53d1a9f9967bd49926df6dc5f257bbb7928f8b48 /doc/src | |
| parent | ba95a6933632410d103d6f17cd3bc1adf92a08f9 (diff) | |
| download | postgresql-728840fe13acff7b03a4b1a813eeb8900ce5e469.tar.gz postgresql-728840fe13acff7b03a4b1a813eeb8900ce5e469.zip | |
docs: PG 12 release notes, support functions
Move support function mention to the proper section, and reword.
Reported-by: Tom Lane
Discussion: https://postgr.es/m/5121.1558472431@sss.pgh.pa.us
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/release-12.sgml | 45 |
1 files changed, 22 insertions, 23 deletions
diff --git a/doc/src/sgml/release-12.sgml b/doc/src/sgml/release-12.sgml index dcce8668929..d80d89e6a28 100644 --- a/doc/src/sgml/release-12.sgml +++ b/doc/src/sgml/release-12.sgml @@ -832,29 +832,6 @@ Author: Tom Lane <tgl@sss.pgh.pa.us> <listitem> <!-- Author: Tom Lane <tgl@sss.pgh.pa.us> -2019-02-09 [1fb57af92] Create the infrastructure for planner support functions. -Author: Tom Lane <tgl@sss.pgh.pa.us> -2019-02-09 [a391ff3c3] Build out the planner support function infrastructure. ---> - - <para> - Add support function capability to improve optimizer estimates - for functions (Tom Lane) - </para> - - <para> - This allows extensions to create planner support functions that - can provide function-specific selectivity, cost, and row-count - estimates that can depend on the function arguments. Also, improve - in-core estimates for <function>generate_series()</function>, - <function>unnest()</function>, and functions that return boolean - values. - </para> - </listitem> - - <listitem> -<!-- -Author: Tom Lane <tgl@sss.pgh.pa.us> 2018-12-13 [04fe805a1] Drop no-op CoerceToDomain nodes from expressions at plan --> @@ -2898,6 +2875,28 @@ existin </para> </listitem> + <listitem> +<!-- +Author: Tom Lane <tgl@sss.pgh.pa.us> +2019-02-09 [1fb57af92] Create the infrastructure for planner support functions. +Author: Tom Lane <tgl@sss.pgh.pa.us> +2019-02-09 [a391ff3c3] Build out the planner support function infrastructure. +--> + + <para> + Add support function capability to improve optimizer estimates, + inlining, and indexing for functions (Tom Lane) + </para> + + <para> + This allows extensions to create planner support functions that + can provide function-specific selectivity, cost, and row-count + estimates that can depend on the function's arguments. Support + functions can also supply simplified representations and index + conditions, greatly expanding optimization possibilities. + </para> + </listitem> + <listitem> <!-- Author: Andres Freund <andres@anarazel.de> |