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### Description
Velox should already support pushdown timestamp type to scan now.
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A window function (`OVER` clause) is currently translated to a complicated pattern in the HIR-to-MIR lowering. This prevents `ProjectionPushdown` from realizing if a window function and later operatio…
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## Expected Behavior or Use Case
When presto identifies a join query which is specific to a Jdbc remote datasource, it split the join query into multiple select query based on the number of t…
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### Checks
- [X] I have checked that this issue has not already been reported.
- [X] I have confirmed this bug exists on the [latest version](https://pypi.org/project/polars/) of Polars.
### Reprodu…
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It currently appears that predicate pushdown isn't applied before calculating what Parquet files are included in scanning the table's data.
The AVRO manifest files include statistics about each Par…
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# Issue report
_The following information is very important in order to help us to help you. Omission of the following details cause delays or could receive no attention at all._
## Operating sy…
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This issue is related to the discussion in this comment:
The following code demonstrates the difference in filter
pushdown between DuckDB and Duckplyr as shown by the `explain()`
function.
W…
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I don't think it's currently possible to efficiently filter by a [DBRef](https://www.mongodb.com/docs/manual/reference/database-references/) field.
While dereference pushdown is supported it is [ex…
nsaje updated
4 months ago
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## Enhancement
tidb_opt_projection_push_down is introduced by #27029 , and is set 'off' by default, still not GA now.
It aimed to improve performance in two sides:
1. Utilize distributed tikv nod…
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**Is your feature request related to a problem? Please describe.**
Filter pushdown is a sophisticated feature available with C++/Spark readers that has the potential to enhance query performance. It'…