feat(expr): cast from jsonb to bool and number

[xiangjinwu]

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What's changed and what's your intention?

Support casting from jsonb scalar to smallint / int / bigint / decimal / real / double precision. It is a runtime error if the jsonb type does not match.

Note that we limit the number as f64 but PostgreSQL uses arbitrary precision numeric. The f64 is enough as suggested by RFC 8259 for good interoperability. To support higher precision, we need to enable arbitrary_precision of crate serde_json and exam related code path.

There is also a subtle difference between decimal and f64 in PostgreSQL, when they round 2.5 to integer. But this issue is currently shadowed by #5576.

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added an item to track fuzzing tests Sqlsmith: Sql feature generation #7934
• All checks passed in ./risedev check (or alias, ./risedev c)

Documentation

Types of user-facing changes

• SQL commands, functions, and operators

Release note

Support casting from jsonb scalar to smallint / int / bigint / decimal / real / double precision. It is a runtime error if the jsonb type does not match.

[codecov]

Codecov Report

Merging #8008 (7099711) into main (050aa4a) will decrease coverage by 0.02%.
The diff coverage is 21.15%.

@@            Coverage Diff             @@
##             main    #8008      +/-   ##
==========================================
- Coverage   71.34%   71.32%   -0.02%     
==========================================
  Files        1129     1129              
  Lines      181502   181554      +52     
==========================================
+ Hits       129485   129498      +13     
- Misses      52017    52056      +39     

Flag	Coverage Δ
rust	71.32% <21.15%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/common/src/array/jsonb_array.rs	21.21% <0.00%> (-2.58%)	⬇️
src/expr/src/vector_op/cast.rs	88.44% <0.00%> (-2.24%)	⬇️
src/expr/src/sig/cast.rs	83.95% <100.00%> (+2.52%)	⬆️
...frontend/src/scheduler/hummock_snapshot_manager.rs	60.00% <0.00%> (-0.48%)	⬇️
src/common/src/cache.rs	97.15% <0.00%> (-0.11%)	⬇️
src/stream/src/executor/aggregation/minput.rs	96.25% <0.00%> (-0.11%)	⬇️
src/storage/src/hummock/sstable_store.rs	64.93% <0.00%> (+0.15%)	⬆️
src/common/src/types/ordered_float.rs	31.06% <0.00%> (+0.19%)	⬆️
src/object_store/src/object/mod.rs	48.86% <0.00%> (+0.20%)	⬆️
src/meta/src/hummock/mock_hummock_meta_client.rs	65.97% <0.00%> (+0.51%)	⬆️
... and 1 more

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[BugenZhao]

LGTM!