davidradl commented on code in PR #27216: URL: https://github.com/apache/flink/pull/27216#discussion_r2509617213
########## docs/content/docs/dev/table/sql/queries/vector-search.md: ########## @@ -0,0 +1,115 @@ +--- +title: "Vector Search" +weight: 7 +type: docs +--- +<!-- +Licensed to the Apache Software Foundation (ASF) under one +or more contributor license agreements. See the NOTICE file +distributed with this work for additional information +regarding copyright ownership. The ASF licenses this file +to you under the Apache License, Version 2.0 (the +"License"); you may not use this file except in compliance +with the License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, +software distributed under the License is distributed on an +"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +KIND, either express or implied. See the License for the +specific language governing permissions and limitations +under the License. +--> + +# Vector Search + +{{< label Batch >}} {{< label Streaming >}} + +Flink SQL provides the `VECTOR_SEARCH` table-valued function (TVF) to perform vector search in SQL queries. This function allows you to search similar rows according to the high-dimension vectors. + +## VECTOR_SEARCH Function + +The `VECTOR_SEARCH` uses a processing-time attribute to correlate rows to the latest version of data in an external table. It's very similar to lookup join in Flink SQL, however, the difference is +`VECTOR_SEARCH` uses the input data vector to compare the similarity among data in the external table and return the top-k most similar rows. + +### Syntax + +```sql +SELECT * +FROM input_table, LATERAL TABLE(VECTOR_SEARCH( + TABLE vecotr_table, + input_table.vector_column, + DESCRIPTOR(index_column), + top_k, + [CONFIG => MAP['key', 'value']] + )) +``` + +### Parameters + +- `input_table`: The input table containing the data to be processed +- `vector_table`: The name of external table that allows to search via vector Review Comment: nit: to search via vector-> searching via vectors -- 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]
