changes for ncruces go

examples/simple-go-ncruces/.gitignore

@@ -0,0 +1,2 @@
+demo
+*.wasm

examples/simple-go-ncruces/Makefile

@@ -0,0 +1,6 @@
+
+demo: demo.go
+	go build -o $@ $<
+
+sqlite3.vec.wasm:
+	exit 1

examples/simple-go-ncruces/demo.go

@@ -0,0 +1,114 @@
+package main
+
+import (
+	"bytes"
+	_ "embed"
+	"encoding/binary"
+	"fmt"
+	"log"
+
+	"github.com/ncruces/go-sqlite3"
+)
+
+func serializeFloat32(vector []float32) ([]byte, error) {
+	buf := new(bytes.Buffer)
+	err := binary.Write(buf, binary.LittleEndian, vector)
+	if err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}
+
+const memory = ":memory:"
+
+//go:embed sqlite3.vec.wasm
+var sqliteWithVecWasm []byte
+
+func main() {
+	sqlite3.Binary = sqliteWithVecWasm
+
+	db, err := sqlite3.Open(memory)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	stmt, _, err := db.Prepare(`SELECT sqlite_version(), vec_version()`)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+
+	err = db.Exec("CREATE VIRTUAL TABLE vec_items USING vec0(embedding float[4])")
+	if err != nil {
+		log.Fatal(err)
+	}
+	items := map[int][]float32{
+		1: {0.1, 0.1, 0.1, 0.1},
+		2: {0.2, 0.2, 0.2, 0.2},
+		3: {0.3, 0.3, 0.3, 0.3},
+		4: {0.4, 0.4, 0.4, 0.4},
+		5: {0.5, 0.5, 0.5, 0.5},
+	}
+	q := []float32{0.3, 0.3, 0.3, 0.3}
+
+	stmt, _, err = db.Prepare("INSERT INTO vec_items(rowid, embedding) VALUES (?, ?)")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for id, values := range items {
+		v, err := serializeFloat32(values)
+		if err != nil {
+			log.Fatal(err)
+		}
+		stmt.BindInt(1, id)
+		stmt.BindBlob(2, v)
+		err = stmt.Exec()
+		if err != nil {
+			log.Fatal(err)
+		}
+		stmt.Reset()
+	}
+	stmt.Close()
+
+
+
+	stmt, _, err = db.Prepare(`
+		SELECT
+			rowid,
+			distance
+		FROM vec_items
+		WHERE embedding MATCH ?
+		ORDER BY distance
+		LIMIT 3
+	`);
+
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	query, err := serializeFloat32(q)
+	if err != nil {
+		log.Fatal(err)
+	}
+	stmt.BindBlob(1, query)
+
+	for stmt.Step() {
+		rowid := stmt.ColumnInt64(0)
+		distance := stmt.ColumnFloat(1)
+		fmt.Printf("rowid=%d, distance=%f\n", rowid, distance)
+	}
+	if err := stmt.Err(); err != nil {
+		log.Fatal(err)
+	}
+
+	err = stmt.Close()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	err = db.Close()
+	if err != nil {
+		log.Fatal(err)
+	}
+}

examples/simple-go-ncruces/go.mod

@@ -0,0 +1,13 @@
+module asg017.com/ex1
+
+go 1.22.5
+
+require github.com/ncruces/go-sqlite3 v0.17.1
+
+require (
+	github.com/ncruces/julianday v1.0.0 // indirect
+	github.com/tetratelabs/wazero v1.7.3 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+)
+
+//replace github.com/ncruces/go-sqlite3 => ../go-sqlite3

examples/simple-go-ncruces/go.sum

@@ -0,0 +1,10 @@
+github.com/ncruces/go-sqlite3 v0.17.1 h1:VxTjDpCn87FaFlKMaAYC1jP7ND0d4UNj+6G4IQDHbgI=
+github.com/ncruces/go-sqlite3 v0.17.1/go.mod h1:FnCyui8SlDoL0mQZ5dTouNo7s7jXS0kJv9lBt1GlM9w=
+github.com/ncruces/julianday v1.0.0 h1:fH0OKwa7NWvniGQtxdJRxAgkBMolni2BjDHaWTxqt7M=
+github.com/ncruces/julianday v1.0.0/go.mod h1:Dusn2KvZrrovOMJuOt0TNXL6tB7U2E8kvza5fFc9G7g=
+github.com/tetratelabs/wazero v1.7.3 h1:PBH5KVahrt3S2AHgEjKu4u+LlDbbk+nsGE3KLucy6Rw=
+github.com/tetratelabs/wazero v1.7.3/go.mod h1:ytl6Zuh20R/eROuyDaGPkp82O9C/DJfXAwJfQ3X6/7Y=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
+golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=