feat: Support SQL ORDER BY ALL syntax

[alexander-beedie]

Continuing the recent onslaught of modern/friendly SQL syntax support...

• SELECT * FROM df ORDER BY ALL

This syntax automatically orders by all columns found in the final selection¹.
Can also apply DESC and NULLS FIRST/LAST modifiers, which get broadcast to all columns in the sort.

Example

This query...

pl.sql("""
  SELECT a, b, c, d, e, f, g FROM df
  ORDER BY 
    a DESC NULLS LAST, 
    b DESC NULLS LAST, 
    c DESC NULLS LAST,
    d DESC NULLS LAST, 
    e DESC NULLS LAST, 
    f DESC NULLS LAST,
    g DESC NULLS LAST
""")

...can now be written much more succinctly as:

pl.sql("""
  SELECT a, b, c, d, e, f, g FROM df 
  ORDER BY ALL DESC NULLS LAST
""")

Footnotes

1. Note: if an actual column called "ALL" (irrespective of case) is present, that is prioritised. ↩

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.81%. Comparing base (048c784) to head (672cde0).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #17212      +/-   ##
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- Coverage   80.82%   80.81%   -0.01%     
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  Files        1465     1466       +1     
  Lines      192039   192237     +198     
  Branches     2741     2745       +4     
==========================================
+ Hits       155211   155357     +146     
- Misses      36323    36375      +52     
  Partials      505      505              

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