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Help with an interesting Postgres question: Why isn't an Index Only Scan used on a partition accessed via the parent table?.
CREATE TABLE
INSERT 0 1
series_name | obs_value | time_period |
---|---|---|
FG384104005.Q | 3.825831484374212 | 2017-12-31 |
FG384104005.Q | 6.685299171442962 | 2018-03-31 |
FG384104005.Q | 3.922904576231467 | 2018-06-30 |
FG384104005.Q | 4.130042303121223 | 2018-09-30 |
FG384104005.Q | 3.377391222747768 | 2018-12-31 |
FG384104005.Q | 5.905098159371182 | 2019-03-31 |
FG384104005.Q | 3.142025368753797 | 2019-06-30 |
FG154104005.Q | 5.084259576315951 | 2017-12-31 |
FG154104005.Q | 2.994283100284392 | 2018-03-31 |
FG154104005.Q | 3.357940781533728 | 2018-06-30 |
FG154104005.Q | 3.382807703277534 | 2018-09-30 |
FG154104005.Q | 2.915212086558261 | 2018-12-31 |
FG154104005.Q | 2.072911152729307 | 2019-03-31 |
FG154104005.Q | 4.265474038700484 | 2019-06-30 |
FG153165105.Q | 3.190052017480996 | 2017-12-31 |
FG153165105.Q | 2.590072043418194 | 2018-03-31 |
FG153165105.Q | 3.343399749580076 | 2018-06-30 |
FG153165105.Q | 3.108870948819421 | 2018-09-30 |
FG153165105.Q | 2.368108520717171 | 2018-12-31 |
FG153165105.Q | 2.190939916139975 | 2019-03-31 |
FG153165105.Q | 3.183395534476023 | 2019-06-30 |
FG153166000.Q | 6.158260115598504 | 2017-12-31 |
FG153166000.Q | 3.554759020656510 | 2018-03-31 |
FG153166000.Q | 4.231760626750670 | 2018-06-30 |
FG153166000.Q | 5.462344733253373 | 2018-09-30 |
FG153166000.Q | 5.432498874027520 | 2018-12-31 |
FG153166000.Q | 4.268915782478897 | 2019-03-31 |
FG153166000.Q | 4.640293079973249 | 2019-06-30 |
FG144104005.Q | 4.856960795039409 | 2017-12-31 |
FG144104005.Q | 3.937026292209636 | 2018-03-31 |
FG144104005.Q | 3.368250237127337 | 2018-06-30 |
FG144104005.Q | 3.939649024335195 | 2018-09-30 |
FG144104005.Q | 4.527273794666953 | 2018-12-31 |
FG144104005.Q | 6.679776228429807 | 2019-03-31 |
FG144104005.Q | 4.364320285758023 | 2019-06-30 |
FG104104005.Q | 3.503452371709450 | 2017-12-31 |
FG104104005.Q | 3.670254159879930 | 2018-03-31 |
FG104104005.Q | 1.309016868338993 | 2018-06-30 |
FG104104005.Q | 4.191176501703054 | 2018-09-30 |
FG104104005.Q | 2.041634403281393 | 2018-12-31 |
FG104104005.Q | 7.590014224313086 | 2019-03-31 |
FG104104005.Q | 4.279407898561263 | 2019-06-30 |
FG314104005.Q | 1.785825656428645 | 2017-12-31 |
FG314104005.Q | 14.288117205171471 | 2018-03-31 |
FG314104005.Q | 5.663750800146286 | 2018-06-30 |
FG314104005.Q | 5.947833760197000 | 2018-09-30 |
FG314104005.Q | 3.659446647972927 | 2018-12-31 |
FG314104005.Q | 9.799654480658001 | 2019-03-31 |
FG314104005.Q | 2.084444919189768 | 2019-06-30 |
FG214104005.Q | 3.928584786168869 | 2017-12-31 |
FG214104005.Q | -3.198453580216953 | 2018-03-31 |
FG214104005.Q | -0.364751393518411 | 2018-06-30 |
FG214104005.Q | -1.493354542386708 | 2018-09-30 |
FG214104005.Q | -1.575085049703778 | 2018-12-31 |
FG214104005.Q | -1.163191483206581 | 2019-03-31 |
FG214104005.Q | -2.510471166127347 | 2019-06-30 |
FG794104005.Q | 0.159348908897592 | 2017-12-31 |
FG794104005.Q | 1.678531748037725 | 2018-03-31 |
FG794104005.Q | 2.226028889034942 | 2018-06-30 |
FG794104005.Q | 1.844495517503089 | 2018-09-30 |
FG794104005.Q | 2.848153667727601 | 2018-12-31 |
FG794104005.Q | 2.027952718415100 | 2019-03-31 |
FG794104005.Q | 2.490888053624153 | 2019-06-30 |
FG264104005.Q | 16.232882216382549 | 2017-12-31 |
FG264104005.Q | 9.322037677591291 | 2018-03-31 |
FG264104005.Q | 4.467988888014356 | 2018-06-30 |
FG264104005.Q | 5.907598117735855 | 2018-09-30 |
FG264104005.Q | -1.598513733891009 | 2018-12-31 |
FG264104005.Q | -1.617225073562540 | 2019-03-31 |
FG264104005.Q | 9.883975645208007 | 2019-06-30 |
SELECT 70