Duckdb

This is the fifth preview release of DuckDB. Feedback is very welcome.
Binary builds can be found here: http://download.duckdb.org/alias/v0.1.6/

SQL
- 455 Table renames `ALTER TABLE tbl RENAME TO tbl2`
- 457 Nested list type can be created using `LIST` aggregation and unpacked with the new `UNNEST` operator
- 463 `INSTR` string function, 477 `PREFIX` string function, 480 `SUFFIX` string function

Engine
- 442 Optimized casting performance to strings
- 444 Variable return types for table-producing functions
- 453 Rework aggregate function interface
- 474 Selection vector rework
- 478 UTF8 NFC normalization of all incoming strings
- 482 Skipping table segments during scan based on min/max indices

Python client
- 451 `date` / `datetime` support
- 467 `description` field for cursor
- 473 Adding `read_only` flag to `connect`
- 481 Rewrite of Python API using `pybind11`

R client
- 468 Support for prepared statements in R client
- 479 Adding automatic CSV to table function `read_csv_duckdb`
- 483 Direct scan operator for R `data.frame` objects

This is the fourth preview release of DuckDB. Feedback is very welcome. Note: The v0.1.4 version was skipped because of a Python packaging issue.

Binary builds can be found here:
http://download.duckdb.org/rev/59f8907b5d89268c158ae1774d77d6314a5c075f/

Major changes:
- 409 Vector Overhaul
- 423 Remove individual vector cardinalities
- 418 `DATE_TRUNC` SQL function
- 424 `REVERSE` SQL function
- 416 Support for `SELECT table.* FROM table`
- 414 STRUCT types in query execution
- 431 Changed internal string representation
- 433 Rename internal type `index_t` to `idx_t`
- 439 Support for temporary structures in read-only mode
- 440 Builds on Solaris & OpenBSD


*Note*: This release contains a bug in the Python API that leads to crashes when fetching strings to NumPy/Pandas 447

This is the third preview release of DuckDB. Feedback is very welcome.
Binary builds can be found here:
http://download.duckdb.org/rev/59f8907b5d89268c158ae1774d77d6314a5c075f/

Major changes:
* 388 Major updates to shell
* 390 Unused Column & Column Lifetime Optimizers
* 402 String and compound keys in indices/primary keys
* 406 Adaptive reordering of filter expressions

This is the third preview release of DuckDB. Feedback is very welcome.
Binary builds can be found here:
http://download.duckdb.org/rev/6fcb5ef8e91dcb3c9b2c4ca86dab3b1037446b24/

This is the second preview release of DuckDB. Feedback is very welcome.
Binary builds can be found here:
http://download.duckdb.org/rev/2e51e9bae7699853420851d3d2237f232fc2a9a8/

This is the first preview release of DuckDB. Feedback is very welcome.

Binary builds can be found here: http://download.duckdb.org/rev/c1cbc9d0b5f98a425bfb7edb5e6c59b5d10550e4/