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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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# Apache DataFusion 42.1.0 Changelog
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This release consists of 5 commits from 4 contributors. See credits at the end of this changelog for more information.
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**Other:**
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- Backport update to arrow 53.1.0 on branch-42 [#12977](https://github.com/apache/datafusion/pull/12977) (alamb)
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- Backport "Provide field and schema metadata missing on cross joins, and union with null fields" (#12729) [#12974](https://github.com/apache/datafusion/pull/12974) (matthewmturner)
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- Backport "physical-plan: Cast nested group values back to dictionary if necessary" (#12586) [#12976](https://github.com/apache/datafusion/pull/12976) (matthewmturner)
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- backport-to-DF-42: Provide field and schema metadata missing on distinct aggregations [#12975](https://github.com/apache/datafusion/pull/12975) (Xuanwo)
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## Credits
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Thank you to everyone who contributed to this release. Here is a breakdown of commits (PRs merged) per contributor.
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```
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2 Matthew Turner
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1 Andrew Lamb
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1 Andy Grove
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1 Xuanwo
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```
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Thank you also to everyone who contributed in other ways such as filing issues, reviewing PRs, and providing feedback on this release.
Copy file name to clipboardExpand all lines: docs/source/user-guide/configs.md
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| datafusion.execution.parquet.statistics_enabled | page | (writing) Sets if statistics are enabled for any column Valid values are: "none", "chunk", and "page" These values are not case sensitive. If NULL, uses default parquet writer setting |
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| datafusion.execution.parquet.max_statistics_size | 4096 | (writing) Sets max statistics size for any column. If NULL, uses default parquet writer setting |
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| datafusion.execution.parquet.max_row_group_size | 1048576 | (writing) Target maximum number of rows in each row group (defaults to 1M rows). Writing larger row groups requires more memory to write, but can get better compression and be faster to read. |
| datafusion.execution.parquet.data_page_row_count_limit | 20000 | (writing) Sets best effort maximum number of rows in data page |
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| datafusion.execution.parquet.encoding | NULL | (writing) Sets default encoding for any column. Valid values are: plain, plain_dictionary, rle, bit_packed, delta_binary_packed, delta_length_byte_array, delta_byte_array, rle_dictionary, and byte_stream_split. These values are not case sensitive. If NULL, uses default parquet writer setting |
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