Georgi Peev

**Describe the bug** Clickhouse is not designed to support deleting rows, although it supports it via expensive `ALTER TABLE ... DELETE WHERE` statements. A much more efficient way of deleting...

The documentation of `sqlalchemy.sql.schema.Column` specifies that the `nullable` constructor parameter should affect CREATE TABLE statements (and only them): ``` :param nullable: When set to ``False``, will cause the "NOT NULL"...

Improve performance of queries that result in many blocks

23

**Is your feature request related to a problem? Please describe.** This request is related to a performance issue. When `clickhouse_connect.driver.client.Client.query_df` results are sent back in a large number of separate...

Using pandas 2.0 cause query_df to return columns with different/unexpected dtypes

4

### Describe the bug Using pandas 2.0 causes `query_df` to return `DataFrame`s where the columns corresponding to Date/DateTime/DateTime64 have different dtypes than those when using pandas 1.5.3 as shown in...