Added connection pooling support for PostgreSQL table and dictionary engines in ClickHouse.
Why it matters
This feature addresses the problem of inefficient and potentially overloaded PostgreSQL connections by introducing connection pooling, which improves performance and stability when querying PostgreSQL data sources from ClickHouse.How to use it
To enable connection pooling, configure the PostgreSQL table engine or dictionary source to use the new connection pool settings as documented. This typically involves specifying connection pool parameters in the table or dictionary configuration to manage and reuse connections efficiently.