[SingleStore] Add Vector column/index doc, fix SingleStore imports

src/content/docs/column-types/singlestore.mdx

@@ -560,6 +560,62 @@ CREATE TABLE `table` (
 
 ## ---
 
+### vector
+
+<Section>
+```typescript
+import { singlestoreTable, vector } from "drizzle-orm/singlestore-core";
+
+const table = singlestoreTable('table', {
+	embedding: vector('embedding', { dimensions: 10 }),
+});
+```
+
+```sql
+CREATE TABLE `table` (
+	`embedding` vector(10, F32)
+);
+```
+</Section>
+
+You can specify `elementType` in order to change what element type the vector
+consists of. This can be one of `I8`, `I16`, `I32`, `I64`, `F32`, or `F64`
+
+<Section>
+```typescript
+import { singlestoreTable, vector } from "drizzle-orm/singlestore-core";
+
+const table = singlestoreTable('table', {
+	embedding: vector('embedding', { dimensions: 10, elementType: 'I8' }),
+});
+```
+
+```sql
+CREATE TABLE `table` (
+	`embedding` vector(10, I8)
+);
+```
+</Section>
+
+###### Helper functions
+
+There are two helper functions useful for vector search queries in SingleStore:
+
+<Section>
+```typescript
+import { dotProduct, euclideanDistance } from 'drizzle-orm/singlestore-core/expressions';
+
+euclideanDistance(table.column, [3, 1, 2]);
+dotProduct(table.column, [3, 1, 2]);
+```
+```sql
+table.column <-> '[3, 1, 2]'
+table.column <*> '[3, 1, 2]`
+```
+</Section>
+
+## ---
+
 ### Customizing data type
 
 Every column builder has a `.$type()` method, which allows you to customize the data type of the column. This is useful, for example, with unknown or branded types.

src/content/docs/guides/_map.json

@@ -13,7 +13,7 @@
   ["empty-array-default-value", "Empty array as a default value"],
   ["update-many-with-different-value", "Update many with different value for each row"],
   ["unique-case-insensitive-email", "Unique and Case-Insensitive Email Handling"],
-  ["vector-similarity-search", "Vector similarity search with pgvector extension"],
+  ["vector-similarity-search", "Vector similarity search"],
   ["postgresql-full-text-search", "PostgreSQL full-text search"],
   ["d1-http-with-drizzle-kit", "Cloudflare D1 HTTP API with Drizzle Kit"],
   ["point-datatype-psql", "Point datatype in PostgreSQL"],