linkedin/coral

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Coral is a translation, analysis, and query rewrite engine for SQL and other relational languages.

Stars: 906
Forks: 219
Open beginner issues: 0
Indexed issues: 63
Avg merge: 2d 13h
Merged PRs (30d): 2

Dominant language: Java
License: BSD-2-Clause
Last GitHub push: Sep 4, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue help wanted

Beginner friendly Everything

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63 open issues indexed

Migrate callers off HiveTable.getHiveTable() (deprecated INTERNAL API) Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

linkedin/coral#606 · Opened May 5, 2026
Refactor SQL parsing components to Use CoralTable Instead of Hive Table Open

CoralIR enhancement

linkedin/coral#575 · 1 comment · 1 assignee · Opened Jan 8, 2026
fix(hive): Failed to derive column type on CTE statement in ShiftArrayIndexTransformer Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

linkedin/coral#574 · Opened Dec 19, 2025
feat(hive): Make hive view translation configurable Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

linkedin/coral#573 · Opened Dec 19, 2025
fix(hive): Support different value types for hive MapValueConstructor Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

linkedin/coral#570 · Opened Dec 18, 2025
com.linkedin.coral.hive.hive2rel.parsetree.parser.ParseException: Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

linkedin/coral#554 · Opened Aug 20, 2025
bootRun: Could not locate executable null\bin\winutils.exe in the Hadoop binaries And throwing NullPointerException when initLocalMetastore() Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linkedin/coral#545 · 2 comments · Opened Jan 9, 2025
Improve CAST(STRING AS TIMESTAMP) in Hive to Trino conversion. Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

linkedin/coral#543 · 1 comment · Opened Nov 19, 2024
Is there a way to bump up calcite to latest release of 1.37.0 or any recent version in line with linkedin 1.2x branch. Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

linkedin/coral#538 · Opened Sep 24, 2024
Coral-schema returns wrong nullability for inner fields of a struct when I apply a UDF on the struct field Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

linkedin/coral#537 · Opened Sep 24, 2024
Add Test Coverage Report and Enforcement Open

documentation enhancement good first issue help wanted

linkedin/coral#528 · 1 comment · 1 assignee · Opened Sep 13, 2024
Incorrect Conversion of DECIMAL Data Type in Hive Views Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

linkedin/coral#526 · 3 comments · Opened Aug 27, 2024
Improve Reliability of Dynamic UDF Resolution in Coral Hive Open

enhancement good first issue

linkedin/coral#505 · 1 assignee · Opened May 20, 2024
Are there plans to support flink sql? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

linkedin/coral#485 · 1 comment · Opened Jan 18, 2024
"status":404,"error":"Not Found","message":"","path":"/" Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

linkedin/coral#475 · 1 comment · Opened Nov 13, 2023
[Coral-Trino] cannot recognize input near 'select' 'max' '(' in expression specification Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

linkedin/coral#469 · 1 comment · Opened Oct 24, 2023
Package coral-service/frontend Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

linkedin/coral#466 · 1 comment · Opened Oct 18, 2023
trino parser decimal type get wrong scala Open

Difficulty 2/5 1-3 hours Newbie friendliness 50/100

linkedin/coral#453 · 1 comment · Opened Sep 13, 2023
Feature: Consider supporting flink sql Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

linkedin/coral#451 · 22 comments · Opened Sep 8, 2023
Conversion failed when the table join contains the `in` operator Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

linkedin/coral#423 · Opened Jun 13, 2023
parse Hive sql : java.lang.RuntimeException: while converting Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

linkedin/coral#422 · Opened Jun 13, 2023
Extract_union doesnt return struct Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

linkedin/coral#419 · Opened Jun 6, 2023
Does Trino to Spark only support conversion syntax differences? Does it not support conversion of function differences? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linkedin/coral#413 · 2 comments · Opened May 24, 2023
Questions about implicit conversion when hiveSQL is converted to trinoSQL Open

CoralIR

Difficulty 4/5 3-5 days Newbie friendliness 30/100

linkedin/coral#395 · 1 comment · Opened Apr 21, 2023
Does not support hive function unix_timestamp() Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

linkedin/coral#388 · Opened Apr 11, 2023
Trino to Spark conversion is broken Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linkedin/coral#371 · 3 comments · Opened Mar 22, 2023
Avoid overriding `public Result visit(Values e)` by backporting fixes to linkedin-calcite Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linkedin/coral#370 · Opened Mar 20, 2023
Is there a packaged docker image available to try it out? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

linkedin/coral#367 · 1 comment · Opened Mar 8, 2023
why does not support the mode of spark sql to trino Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

linkedin/coral#363 · 3 comments · Opened Feb 26, 2023
Investigate using SqlBasicCall in SqlCallTransformer Open

CoralIR

Difficulty 5/5 Over a week Newbie friendliness 25/100

linkedin/coral#348 · Opened Jan 19, 2023
Implicit call order assumption in SqlCallTransformer.getRelDataType(SqlNode) Open

CoralIR

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linkedin/coral#347 · Opened Jan 19, 2023
Is it possible to support sparksql parser，so that coral can support sparksql to hive/trino? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

linkedin/coral#330 · 4 comments · Opened Nov 7, 2022
cannot recognize input near 'as' ''中文'' ',' in selection target Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

linkedin/coral#328 · Opened Nov 2, 2022
Coral Schema union behavior for a nullable field and a non-nullable field with default value Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

linkedin/coral#322 · Opened Oct 25, 2022
Trino SQL with `UNNEST(arrayOfStruct) AS t(col0, col1...)` cannot be converter to CoralIR Open

CoralIR

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linkedin/coral#319 · Opened Oct 21, 2022
Trino SQLs cannot be converted to CoralSqlNode & CoralRelNode representation Open

CoralIR

Difficulty 4/5 3-5 days Newbie friendliness 30/100

linkedin/coral#317 · Opened Oct 21, 2022
Supporting CTAS queries for Hive to SparkSql translations Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

linkedin/coral#316 · Opened Oct 21, 2022
Escape characters are not handled correctly in regular expressions while convert Hive SQL to Trino SQL Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

linkedin/coral#305 · Opened Sep 15, 2022
Append 2 AS operators in SqlNode representation for LATERAL VIEWS Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

linkedin/coral#300 · 1 comment · Opened Sep 1, 2022
Hive -> RelNode representation for Lateral Views has LogicalJoin as a RelNode Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

linkedin/coral#299 · Opened Sep 1, 2022
Hive -> Presto Can you support Grouping Sets ? Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

linkedin/coral#294 · Opened Aug 2, 2022
Hive to Trino Sort by is not supported Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

linkedin/coral#291 · Opened Jul 21, 2022
Why is the character string transformed into Unicode encoding Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

linkedin/coral#290 · Opened Jul 21, 2022
IntelliJ IDEA not recognize coral-trino-parser libraries Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

linkedin/coral#287 · 3 comments · Opened Jul 2, 2022
Failed to recognize predicate 'ARRAY'. Failed rule: 'identifier' in table or column identifier Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

linkedin/coral#286 · 3 comments · Opened Jun 30, 2022
Remove catalog name from the coralRelNode TableScan Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

linkedin/coral#284 · Opened Jun 24, 2022
Coral transform hive function “regexp_extract” to trino by introduce a new function "hive_pattern_to_trino" Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

linkedin/coral#266 · 1 comment · Opened May 9, 2022
Coral-Schema alias output upper-cased schema even if I explicitly alias to lower case Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

linkedin/coral#249 · Opened Apr 2, 2022
when resolve sql not support group by 1,2,3 this stytle Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

linkedin/coral#245 · Opened Mar 12, 2022
Trino SqlParser doesn't accept backquotes "`" from trino2rel expanded views Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

linkedin/coral#242 · Opened Mar 10, 2022

linkedin/coral

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