datafusion

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simplify_expressions don't support different data type for binary

6

**Describe the bug** A clear and concise description of what the bug is. in the test case `select_distinct_from` Run the test case, we will meet the error for optimizer: ```...

liukun4515

Can't push down projection after do type coercion

1

**Describe the bug** in this https://github.com/apache/arrow-datafusion/pull/3396 pr, I remove the type coercion in the physical phase. We need do the type coercion in the logical phase as much as early....

liukun4515

Allow configs to be set with string values

1

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** In Ballista, I have key-value pairs for configs that I would like...

andygrove

extract OR clause for join

1

# Which issue does this PR close? Closes #3577 # Rationale for this change optimize join's performance when join has OR clauses in filter or on clause. examine any OR...

HuSen8891

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** examine OR clause for join to see if any useful clauses can...

HuSen8891

Support Top-K query optimization for `ORDER BY <EXPR> [ASC|DESC] LIMIT n`

8

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** As explained by @alamb in the user defined plan: > TopK Background:...

Dandandan

make the header not changed when do optimization

3

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** A clear and concise description of what the problem is. Ex. I'm...

liukun4515

Decimal128 support for statistical aggregations

2

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** Inside `Accumulator` implementation of `VarianceAccumulator` (and many others like `CovarianceAccumulator`) `update_batch` method...

metesynnada

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** `RANGE` with offset `PRECEDING/FOLLOWING` requires exactly one `ORDER BY` column. However, when...

mustafasrepo

# Hardcoded u64 for WindowFrameBound fields **Is your feature request related to a problem or challenge? Please describe what you are trying to do.** `WindowFrameBound` enum takes `Option` for `Preceding`...

mustafasrepo