Andy Grove

### What is the problem the feature request solves? Initial observations: - Query is fully native - Similar to q19, lineitem scan takes longer with Comet - Comet avoids an...

Improve performance of TPC-H q19

1

### What is the problem the feature request solves? Comet is currently slower than Spark for query 19. Some initial observations: - The sort merge join cannot run natively due...

Improve performance of TPC-H q16

2

### What is the problem the feature request solves? Comet is currently slower than Spark for TPC-H q16. This query does not run fully native yet. Issues - BuildRight with...

### What is the problem the feature request solves? This epic is a place to track various ideas around improving query performance. Some of these ideas apply to upstream DataFusion...

Use maven-assembly-plugin to set final artifact name

1

### What is the problem the feature request solves? We currently set the artifact name in `` to include the Spark version and the Scala version: ```xml comet-parent-spark${spark.version.short}_${scala.binary.version} ``` This...

### What is the problem the feature request solves? We want to make sure that we address all (currently) known expression compatibility issues in one of the following ways: 1....

Modulus can produce incorrect results in some cases

3

### Describe the bug Example of compatibility issue found by fuzz testing: ``` SELECT c90, c1, c90 % c1 FROM test1 ORDER BY c90, c1; ``` Spark: `-21840,-0.0,NULL` Comet: `-21840,-0.0,NaN`...

Implement cast from struct type to string

3

### What is the problem the feature request solves? Casting from struct to string should be similar to the to_json code ### Describe the potential solution _No response_ ### Additional...

### What is the problem the feature request solves? I recently worked on a few experimental PRs around CBO that I am going to close because they did not provide...

Implement withField and dropField for struct types

4

### What is the problem the feature request solves? See documenttion for more details: https://spark.apache.org/docs/latest/api/python/reference/pyspark.sql/api/pyspark.sql.Column.withField.html https://spark.apache.org/docs/latest/api/python/reference/pyspark.sql/api/pyspark.sql.Column.dropFields.html ### Describe the potential solution _No response_ ### Additional context _No response_