Fix arithmetic operator precedence

[dai-chen]

Description

This PR fixed arithmetic operator precedence reported in the issue below. I tried to reorder operator in mathOperator rule (Reference: https://github.com/antlr/grammars-v4/blob/master/sql/mysql/Positive-Technologies/MySqlParser.g4#L2598). However, reordering operator inside mathOperator rule didn't work at all.

Finally, I split the mathExpressionAtom rule and order them by precedence (Reference: https://github.com/crate/crate/blob/master/libs/sql-parser/src/main/antlr/SqlBaseParser.g4#L299).

Issues Resolved

#293

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

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[codecov-commenter]

Codecov Report

Merging #1172 (bac6f3a) into main (034027c) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #1172      +/-   ##
============================================
- Coverage     95.81%   95.81%   -0.01%     
  Complexity     3521     3521              
============================================
  Files           352      352              
  Lines          9359     9357       -2     
  Branches        673      673              
============================================
- Hits           8967     8965       -2     
  Misses          334      334              
  Partials         58       58              

Flag	Coverage Δ
query-workbench	62.76% <ø> (ø)
sql-engine	98.31% <100.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...pensearch/sql/ppl/parser/AstExpressionBuilder.java	100.00% <100.00%> (ø)
...pensearch/sql/sql/parser/AstExpressionBuilder.java	100.00% <100.00%> (ø)

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[Yury-Fridlyand]

Please fix this for PPL too:

opensearchsql> source=people | eval test = 1 + 2 * 3 | fields `test`;
fetched rows / total rows = 1/1
+--------+
| test   |
|--------|
| 9      |
+--------+

[dai-chen]

Please fix this for PPL too:

opensearchsql> source=people | eval test = 1 + 2 * 3 | fields `test`;
fetched rows / total rows = 1/1
+--------+
| test   |
|--------|
| 9      |
+--------+

I missed it. Let me check.

[dai-chen]

Please fix this for PPL too:

opensearchsql> source=people | eval test = 1 + 2 * 3 | fields `test`;
fetched rows / total rows = 1/1
+--------+
| test   |
|--------|
| 9      |
+--------+

I missed it. Let me check.

Fixed in bac6f3a. I found that PPL expression doesn't support parentheses. I'm not sure if this is by design for other expressions like logical and comparison. I fixed this for arithmetic expression which is required by this precedence fix. Thanks!