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sql: support missing JSON numeric scalar casts #41333

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jordanlewis opened this issue Oct 4, 2019 · 3 comments · Fixed by #41367
Closed

sql: support missing JSON numeric scalar casts #41333

jordanlewis opened this issue Oct 4, 2019 · 3 comments · Fixed by #41367
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@chrisseto
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C-enhancement Solution expected to add code/behavior + preserve backward-compat (pg compat issues are exception) good first issue

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@jordanlewis
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It should be possible to cast JSON scalars to their corresponding SQL types, but it currently is not possible.

We should support:

JSON numeric -> int
JSON numeric -> float
JSON numeric -> decimal
JSON numeric -> string

This change should be pretty straightforward - CastExpr.Eval should be edited in eval.go to add the missing cases, and tests added to pkg/sql/sem/tree/testdata/eval/cast.
@jordanlewis jordanlewis added C-enhancement Solution expected to add code/behavior + preserve backward-compat (pg compat issues are exception) good first issue labels Oct 4, 2019
@97amarnathk
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I would like to work on this.

@jordanlewis
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@97amarnathk I think @chrisseto has an ongoing patch for this. I'll assign him to prevent confusion.

@97amarnathk
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Okay.

@chrisseto chrisseto self-assigned this Oct 6, 2019
@chrisseto chrisseto mentioned this issue Oct 6, 2019
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chrisseto added a commit to chrisseto/cockroach that referenced this issue Oct 6, 2019
@chrisseto
sql: Add support for numeric JSON scalar casts
dcf9ee3 
* Fixes cockroachdb#41333
* Add support for queries such as
  - `SELECT '1'::jsonb::int`
  - `SELECT '1'::jsonb::float`
  - `SELECT '3.14'::jsonb::decimal`

Release note: None
@otan otan mentioned this issue Apr 7, 2020
Merged
craig bot pushed a commit that referenced this issue Feb 12, 2021
@chrisseto
Merge #41367
9f97177 
41367: sql: Add support for numeric JSON scalar casts r=rafiss a=chrisseto

* Fixes #41333
* Add support for queries such as
  - `SELECT '1'::jsonb::int`
  - `SELECT '1'::jsonb::float`
  - `SELECT '3.14'::jsonb::decimal`

Release note (sql change): Casting JSON numeric scalars to numeric
types now works as expected.

Co-authored-by: Chris Seto <chriskseto@gmail.com>
@craig craig bot closed this as completed in 6c64c60 Feb 12, 2021
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C-enhancement Solution expected to add code/behavior + preserve backward-compat (pg compat issues are exception) good first issue
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sql: Add support for numeric JSON scalar casts chrisseto/cockroach
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@jordanlewis @chrisseto @97amarnathk