Add Interval suppport

[junli1026]

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Summary

Add toInterval support. The usage can be like "select interval '1' day". with the pattern of "Interval '[num]' [unit]".

Changelog

• New Feature

Related Issues

Fixes #issue

Test Plan

Unit Tests

Manual tested with mysql and clickhouse client. Test sql includes:
"select interval '1' year"
"select now() + interval '1' year" // this will hit to arithmetic, which is not implemented yet.

[databend-bot]

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[codecov-commenter]

Codecov Report

Merging #1752 (94fb8e3) into master (c41fcfa) will decrease coverage by 0%.
The diff coverage is 56%.

@@          Coverage Diff           @@
##           master   #1752   +/-   ##
======================================
- Coverage      72%     72%   -1%     
======================================
  Files         610     610           
  Lines       36452   36549   +97     
======================================
+ Hits        26357   26410   +53     
- Misses      10095   10139   +44     

Impacted Files	Coverage Δ
common/datavalues/src/data_value.rs	44% <0%> (-1%)	⬇️
common/datavalues/src/types/physical_data_type.rs	81% <0%> (-2%)	⬇️
common/datavalues/src/types/serializations/mod.rs	33% <0%> (-4%)	⬇️
common/datavalues/src/types/data_type_coercion.rs	60% <17%> (-4%)	⬇️
common/datavalues/src/types/data_type.rs	59% <37%> (-7%)	⬇️
...on/functions/src/scalars/arithmetics/arithmetic.rs	68% <66%> (-1%)	⬇️
query/src/sql/plan_parser.rs	75% <88%> (+<1%)	⬆️
query/src/sql/plan_parser_test.rs	97% <100%> (+<1%)	⬆️
...pelines/transforms/transform_aggregator_partial.rs	89% <0%> (-2%)	⬇️
store/src/meta_service/network.rs	73% <0%> (-2%)	⬇️

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[jorgecarleitao]

some extra info:

In arrow there are 3 interval formats, all of which arrow2 supports: Interval in months (i32), interval in (days,milliseconds) ([i32,i32]) and interval in (month,day,nanoseconds) [i32,i32,i64]. These are defined because math in time-aware timezones is often not sufficient in making everything seconds, because a day is not necessarily 24h*3600 sec/h due to leap seconds and others.

There is also the "duration" with 4 units (sec, milli, micro, nano) stored as i64 which is not time-aware.

[junli1026]

some extra info:

In arrow there are 3 interval formats, all of which arrow2 supports: Interval in months (i32), interval in (days,milliseconds) ([i32,i32]) and interval in (month,day,nanoseconds) [i32,i32,i64]. These are defined because math in time-aware timezones is often not sufficient in making everything seconds, because a day is not necessarily 24h*3600 sec/h due to leap seconds and others.

There is also the "duration" with 4 units (sec, milli, micro, nano) stored as i64 which is not time-aware.

Thanks Jorge, is the Interval(Year) in arrows based on real life calander ? For example the one @sundy-li mentioned:

"03-31 interval -1 month ===> 02-29 rather than 03-31 sub 30 days." 

[jorgecarleitao]

Thanks Jorge, is the Interval(Year) in arrows based on real life calander ? For example the one @sundy-li mentioned:

"03-31 interval -1 month ===> 02-29 rather than 03-31 sub 30 days." 

Exactly, Interval(YearMonth) is an i32 representing months. Arrow2 will support ops over intervals; we recently added support to read time-aware timestamps, the next step is the compute :)

[sundy-li]

LGTM, we can add arithmetic ops for the interval type in another pr.

[databend-bot]

CI Passed
Reviewer Approved
Let's Merge