pg_clickhouse v0.1.4

Just a quick post to note the release of [pg_clickhouse] v0.1.4. This v0.1
maintenance release can be upgraded in-place and requires no
`ALTER EXTENSION UPDATE` command; as soon as sessions reload the shared
library they'll be good to go.

Thanks in part to reports from attentive users, v0.1.4's most significant
changes improve the following:

* The binary driver now properly inserts `NULL` into a [Nullable(T)] column.
Previously it would raise an error.
* The http driver now properly parses arrays. Previously it improperly
included single quotes in string items and would choke on brackets (`[]`)
in values.
* Both drivers now support mapping a ClickHouse [String] types to Postgres
[BYTEA] columns. Previously the worked only with [text types], which is
generally preferred. But since ClickHouse explicitly supports binary data
in [String] values (notably [hash function] return values), pg_clickhouse
needs to support it, as well.

Get it in all the usual places:

* [PGXN]
* [GitHub]
* [Docker]

My thanks to pg_clickhouse users like [Rahul Mehta] for reporting issues, and
to my employer, [ClickHouse], for championing this extension. Next up: more
aggregate function mapping, hash function pushdown, and improved subquery
(specifically, `SubPlan`) pushdown.

[pg_clickhouse]: https://pgxn.org/dist/pg_clickhouse/
"pg_clickhouse on PGXN"
[Nullable(T)]: https://clickhouse.com/docs/sql-reference/data-types/nullable
"ClickHouse Docs: Nullable(T)"
[String]: https://clickhouse.com/docs/sql-reference/data-types/string
"ClickHouse Docs: String"
[BYTEA]: https://www.postgresql.org/docs/current/datatype-binary.html
"Postgres Docs: Binary Data Types"
[text types]: https://www.postgresql.org/docs/current/datatype-character.html
"Postgres Docs: Character Types"
[hash function]: https://clickhouse.com/docs/sql-reference/functions/hash-functions
"ClickHouse Docs: Hash functions"
[PGXN]: https://pgxn.org/dist/pg_clickhouse/0.1.4/
"pg_clickhouse 0.1.4 on PGXN"
[GitHub]: https://github.com/ClickHouse/pg_clickhouse/releases/tag/v0.1.4
"pg_clickhouse 0.1.4 on GitHub"
[Docker]: https://github.com/ClickHouse/pg_clickhouse/pkgs/container/pg_clickhouse
"pg_clickhouse OCI Images"
[Rahul Mehta]: https://github.com/ClickHouse/pg_clickhouse/issues/140
"ClickHouse/pg_clickhouse#140 Connection Terminates Unexpectedly When Using NULL Value for UUID"
[ClickHouse]: https://clickhouse.com/clickhouse "ClickHouse: The fastest open-source analytical database"

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❖ Tuesday, 17 Feb 2026
By David E. Wheeler
https://justatheory.com/2026/02/pg_clickhouse-0.1.4/

More about...

* Postgres: https://justatheory.com/tags/postgres/
* pg_clickhouse: https://justatheory.com/tags/pg_clickhouse/