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## Which issue does this PR close? Closes #12154. ## Rationale for this change Besides `projections`, I also handle the `filters` and `fetch` for TableScan. ## What changes are included...

goldmedal

[EPIC] A collection of issues for supporting the `MAP` DataType

4

### Is your feature request related to a problem or challenge? Arrow contains a [`MapArray`](https://docs.rs/arrow/latest/arrow/array/struct.MapArray.html) DataFusion has incomplete support for this type; This ticket tracks adding new fetures. Please add...

alamb

## Which issue does this PR close? closes https://github.com/apache/datafusion/issues/11570 ## Rationale for this change ## What changes are included in this PR? Add an optimization opration for case like: ```...

irenjj

Unparse TableScan with pushdown projection

1

### Is your feature request related to a problem or challenge? Consider the following case: ```rust let ctx = SessionContext::new(); ctx.sql("create table t1 (a int, b int)").await?; ctx.sql("insert into t1...

goldmedal

Enforce the uniqueness of map key name for the map/make_map function

3

### Is your feature request related to a problem or challenge? In most databases, the map type only allows unique keys. Refer to the behavior of DuckDB: ``` D select...

goldmedal

Support protobuf serialization for `ScalarValue::Utf8View` and `ScalarValue::BinaryView`

1

### Is your feature request related to a problem or challenge? Part of https://github.com/apache/datafusion/issues/11752 We are trying to enable DataFusion to use StringViewArray by default. If we do that it...

alamb

`octet_length()` function not working for StringView columns (SQLancer)

1

### Describe the bug Native StringView support for `octet_length()` has been added https://github.com/apache/datafusion/issues/11858 However it's not working for StringView column inside table See reproducer in datafusion-cli (Compiled from latest main...

2010YOUY01

Support `map_values` for MAP type

1

### Is your feature request related to a problem or challenge? Description | Return a list of all values in the map. -- | -- Example | map_values(map([100, 5], [42,...

Weijun-H

Support `map_keys` function for Map type

1

### Is your feature request related to a problem or challenge? Description | Return a list of all keys in the map. -- | -- Example | map_keys(map([100, 5], [42,43]))...

Weijun-H

## Which issue does this PR close? I think this should close #4028 ## Rationale for this change As far as I can tell, this follows the recommendations stated in...

itsjunetime