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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?.
version |
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PostgreSQL 11.20 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-18), 64-bit |
SELECT 1
CREATE TABLE
INSERT 0 3
CREATE TABLE
INSERT 0 3
code | sum |
---|---|
KL | 100 |
SG | 40 |
JKR | null |
SELECT 3
ERROR: column "l.location_name" must appear in the GROUP BY clause or be used in an aggregate function LINE 3: l.location_name, ^