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opt: index accelerate chained fetch value operators #59494

Merged
merged 2 commits into from
Jan 29, 2021
Merged

opt: index accelerate chained fetch value operators #59494

merged 2 commits into from
Jan 29, 2021

Commits on Jan 29, 2021

  1. opt: add test for JSON fetch val inverse 

    Release note: None
    @mgartner
    mgartner committed Jan 29, 2021
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  2. opt: index accelerate chained fetch value operators 

    Prior to cockroachdb#55316, the optimizer generated inverted index scans on indexed
JSON columns when queries had filters with chained fetch value
operators, for example `j->'a'->'b' = '1'`. The logic that made this
possible was found to create query plans not equivalent to the query, so
it was removed. This commit restores the ability to index accelerate
chained -> operators.

Fixes cockroachdb#55317

Release note (performance improvement): A bug fix included in 20.2.1 for
for the JSON fetch value operator, `->`, resulted in chained `->`
operators in query filters not being index accelerated, e.g.,
`j->'a'->'b' = '1'`. Chained `->` are now index accelerated.
    @mgartner
    mgartner committed Jan 29, 2021
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