feat(expr): convert timestamp with time zone from/to unix epoch seconds

[xiangjinwu]

I hereby agree to the terms of the Singularity Data, Inc. Contributor License Agreement.

What's changed and what's your intention?

Support the following exprs:

• to_timestamp(seconds: double precision) -> timestamp with time zone
• extract(epoch from timestamp with time zone) -> seconds: decimal

This also updates the parser to allow arbitrary string as extract units, to align with PostgreSQL.

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• All checks passed in ./risedev check (or alias, ./risedev c)

Documentation

Types of user-facing changes

• SQL commands, functions, and operators

Release note

• Allows converting timestamp with time zone from seconds since unix epoch via to_timestamp.
• Allows converting timestamp with time zone to seconds since unix epoch via extract(epoch from).

Refer to a related PR or issue link (optional)

#5805 (comment)
#5826
#5588
Fixes #5859

[xiangjinwu]

ci error seems irrelevant: #5911

[codecov]

Codecov Report

Merging #5910 (91914e9) into main (6d8c3c5) will increase coverage by 0.03%.
The diff coverage is 61.27%.

@@            Coverage Diff             @@
##             main    #5910      +/-   ##
==========================================
+ Coverage   74.85%   74.89%   +0.03%     
==========================================
  Files         922      924       +2     
  Lines      146824   147014     +190     
==========================================
+ Hits       109911   110103     +192     
+ Misses      36913    36911       -2     

Flag	Coverage Δ
rust	74.89% <61.27%> (+0.03%)	⬆️

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

Impacted Files	Coverage Δ
src/common/src/types/interval.rs	83.79% <0.00%> (-3.34%)	⬇️
src/common/src/types/mod.rs	64.58% <0.00%> (ø)
src/common/src/util/mod.rs	0.00% <ø> (ø)
src/common/src/util/value_encoding/mod.rs	46.66% <0.00%> (+0.28%)	⬆️
src/expr/src/expr/expr_binary_nonnull.rs	77.66% <0.00%> (-1.59%)	⬇️
src/expr/src/expr/expr_unary.rs	62.42% <0.00%> (-0.94%)	⬇️
src/expr/src/vector_op/cast.rs	84.29% <0.00%> (-2.20%)	⬇️
src/expr/src/vector_op/extract.rs	85.00% <0.00%> (-13.08%)	⬇️
src/expr/src/vector_op/timestampz.rs	0.00% <0.00%> (ø)
src/frontend/src/handler/util.rs	77.35% <0.00%> (-0.99%)	⬇️
... and 51 more

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[nanderstabel]

Looks great!