Create changelog for release

datafusion/CHANGELOG.md

@@ -19,6 +19,36 @@
 
 # Changelog
 
+## [7.1.0](https://github.com/apache/arrow-datafusion/tree/7.1.0) (2022-04-10)
+
+[Full Changelog](https://github.com/apache/arrow-datafusion/compare/7.0.0...7.1.0)
+
+**Breaking changes:**
+
+- Improve object store key with considering host and port in ObjectStoreRegistry [\#1778](https://github.com/apache/arrow-datafusion/issues/1778)
+- Remove Sync from SendableRecordBatchStream [\#1614](https://github.com/apache/arrow-datafusion/issues/1614)
+
+**Implemented enhancements:**
+
+- Support substring with three arguments: \(str, from, for\) for DataFrame API and Ballista [\#2092](https://github.com/apache/arrow-datafusion/issues/2092)
+- Convert `SqlToRel::statement_to_pan` to take ownership rather than references. [\#1469](https://github.com/apache/arrow-datafusion/issues/1469)
+
+**Fixed bugs:**
+
+- Parquet reader thread errors do not make query fail [\#1767](https://github.com/apache/arrow-datafusion/issues/1767)
+- `not()` with NULL literals does not work: can't be evaluated because the expression's type is Utf8, not boolean [\#1191](https://github.com/apache/arrow-datafusion/issues/1191)
+
+**Closed issues:**
+
+- Optimize memory usage pattern to avoid "double memory" behavior [\#2149](https://github.com/apache/arrow-datafusion/issues/2149)
+- Document approx\_percentile\_cont\_with\_weight in users guide [\#2078](https://github.com/apache/arrow-datafusion/issues/2078)
+- Add filters and projections to EXPLAIN PLAN for ParquetExec, CSVExec etc [\#2073](https://github.com/apache/arrow-datafusion/issues/2073)
+- \[follow up\]cleaning up statements.remove\(0\) [\#1986](https://github.com/apache/arrow-datafusion/issues/1986)
+- Formatting error on documentation for Python [\#1873](https://github.com/apache/arrow-datafusion/issues/1873)
+- Remove duplicate tests from `test_const_evaluator_scalar_functions` [\#1727](https://github.com/apache/arrow-datafusion/issues/1727)
+- Address limitations of logical expression rewrite logic [\#116](https://github.com/apache/arrow-datafusion/issues/116)
+
+
 ## [7.0.0](https://github.com/apache/arrow-datafusion/tree/7.0.0) (2022-02-14)
 
 [Full Changelog](https://github.com/apache/arrow-datafusion/compare/6.0.0...7.0.0)