feat: use pgvecto.rs (#3605)

server/src/infra/migrations/1700714140297-CreateSmartInfoTextSearchIndex.ts

@@ -0,0 +1,37 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class CreateSmartInfoTextSearchIndex1700714140297 implements MigrationInterface {
+  name = 'CreateSmartInfoTextSearchIndex1700714140297';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    // https://dba.stackexchange.com/a/164081
+    await queryRunner.query(`
+        CREATE OR REPLACE FUNCTION f_concat_ws(text, text[])
+        RETURNS text
+        LANGUAGE sql IMMUTABLE PARALLEL SAFE AS
+        'SELECT array_to_string($2, $1)'`);
+
+    await queryRunner.query(`
+        ALTER TABLE smart_info ADD "smartInfoTextSearchableColumn" tsvector
+        GENERATED ALWAYS AS (
+            TO_TSVECTOR(
+                'english', 
+                f_concat_ws(
+                    ' '::text, 
+                    COALESCE(tags, array[]::text[]) || COALESCE(objects, array[]::text[])
+                )
+            )
+        )
+        STORED NOT NULL`);
+
+    await queryRunner.query(`
+        CREATE INDEX smart_info_text_searchable_idx
+        ON smart_info
+        USING GIN ("smartInfoTextSearchableColumn")`);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`DROP FUNCTION IF EXISTS immutable_concat_ws`);
+    await queryRunner.query(`ALTER TABLE smart_info DROP IF EXISTS "smartInfoTextSearchableColumn"`);
+  }
+}