From 3627320e017e4105022487a09bd17b852cafc885 Mon Sep 17 00:00:00 2001 From: Adrien Nayrat Date: Thu, 24 Dec 2020 12:27:08 +0100 Subject: [PATCH] Mention selectivity estimation error metrics in README They where added in 5ef44ed7bae82d0730c634bb919076de6a5928f5 --- doc/README.md | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/doc/README.md b/doc/README.md index d3c021a..b28d03a 100644 --- a/doc/README.md +++ b/doc/README.md @@ -125,6 +125,19 @@ The extension defines the following functions: - *execution_count*: number of time this predicate has been executed, ie. number of rows it processed. - *nbfiltered*: number of tuples this predicate discarded. + - *min_err_estimate_ratio*: minimum selectivity estimation error ratio + - *max_err_estimate_ratio*: maximum selectivity estimation error ratio + - *mean_err_estimate_ratio*: mean selectivity estimation error ratio + - *stddev_err_estimate_ratio*: standard deviation for selectivity + estimation error ratio + - *min_err_estimate_num*: minimum number of line for selectivity + estimation error + - *max_err_estimate_num*: maximum number of line for selectivity + estimation error + - *mean_err_estimate_num*: mean number of line for selectivity + estimation error + - *stddev_err_estimate_num*: standard deviation for number of line for + selectivity estimation error - *constant_position*: location of the constant in the original query string, as reported by the parser. - *queryid*: if pg_stats_statements is installed, the queryid identifying