writer-jill commented on code in PR #17658: URL: https://github.com/apache/druid/pull/17658#discussion_r1930595521
########## docs/querying/sql-functions.md: ########## @@ -1282,21 +1282,74 @@ Returns the following: ## BLOOM_FILTER -Computes a Bloom filter from values produced by the specified expression. +Computes a [bloom filter](../development/extensions-core/bloom-filter.md) from values provided in an expression. -* **Syntax**: `BLOOM_FILTER(expr, <NUMERIC>)` +`numEntries` specifies the maximum number of distinct values before the false positive rate increases. + +* **Syntax:** `BLOOM_FILTER(expr, numEntries)` * **Function type:** Aggregation +<details><summary>Example</summary> + +The following example returns a base64-encoded bloom filter string for entries in `agent_category`: + +```sql +SELECT + agent_category, + BLOOM_FILTER(agent_category, 10) as bloom +FROM "kttm" + GROUP BY agent_category +``` + +Returns the following: + +| `agent_keys` | `bloom` | +| -- | -- | +| _`empty`_ | `"BAAAAAgAAAAAABAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEABAAAAAA"` | Review Comment: Removed the italics. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
