// Copyright 2026 Google LLC
//
// Licensed 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.
package snowflake
import (
"context"
"fmt"
"github.com/goccy/go-yaml"
"github.com/googleapis/genai-toolbox/internal/sources"
"github.com/jmoiron/sqlx"
_ "github.com/snowflakedb/gosnowflake"
"go.opentelemetry.io/otel/trace"
)
const SourceKind string = "snowflake"
// validate interface
var _ sources.SourceConfig = Config{}
func init() {
if !sources.Register(SourceKind, newConfig) {
panic(fmt.Sprintf("source kind %q already registered", SourceKind))
}
}
func newConfig(ctx context.Context, name string, decoder *yaml.Decoder) (sources.SourceConfig, error) {
actual := Config{Name: name}
if err := decoder.DecodeContext(ctx, &actual); err != nil {
return nil, err
}
return actual, nil
}
type Config struct {
Name string `yaml:"name" validate:"required"`
Kind string `yaml:"kind" validate:"required"`
Account string `yaml:"account" validate:"required"`
User string `yaml:"user" validate:"required"`
Password string `yaml:"password" validate:"required"`
Database string `yaml:"database" validate:"required"`
Schema string `yaml:"schema" validate:"required"`
Warehouse string `yaml:"warehouse"`
Role string `yaml:"role"`
}
func (r Config) SourceConfigKind() string {
return SourceKind
}
func (r Config) Initialize(ctx context.Context, tracer trace.Tracer) (sources.Source, error) {
db, err := initSnowflakeConnection(ctx, tracer, r.Name, r.Account, r.User, r.Password, r.Database, r.Schema, r.Warehouse, r.Role)
if err != nil {
return nil, fmt.Errorf("unable to create connection: %w", err)
}
err = db.PingContext(ctx)
if err != nil {
return nil, fmt.Errorf("unable to connect successfully: %w", err)
}
s := &Source{
Config: r,
DB: db,
}
return s, nil
}
var _ sources.Source = &Source{}
type Source struct {
Config
DB *sqlx.DB
}
func (s *Source) SourceKind() string {
return SourceKind
}
func (s *Source) ToConfig() sources.SourceConfig {
return s.Config
}
func (s *Source) SnowflakeDB() *sqlx.DB {
return s.DB
}
func (s *Source) RunSQL(ctx context.Context, statement string, params []any) (any, error) {
rows, err := s.DB.QueryxContext(ctx, statement, params...)
if err != nil {
return nil, fmt.Errorf("unable to execute query: %w", err)
}
defer rows.Close()
var out []any
for rows.Next() {
cols, err := rows.Columns()
if err != nil {
return nil, fmt.Errorf("unable to get columns: %w", err)
}
values := make([]interface{}, len(cols))
valuePtrs := make([]interface{}, len(cols))
for i := range values {
valuePtrs[i] = &values[i]
}
if err := rows.Scan(valuePtrs...); err != nil {
return nil, fmt.Errorf("unable to scan row: %w", err)
}
vMap := make(map[string]any)
for i, col := range cols {
vMap[col] = values[i]
}
out = append(out, vMap)
}
if err := rows.Err(); err != nil {
return nil, fmt.Errorf("row iteration error: %w", err)
}
return out, nil
}
func initSnowflakeConnection(ctx context.Context, tracer trace.Tracer, name, account, user, password, database, schema, warehouse, role string) (*sqlx.DB, error) {
//nolint:all // Reassigned ctx
ctx, span := sources.InitConnectionSpan(ctx, tracer, SourceKind, name)
defer span.End()
// Set defaults for optional parameters
if warehouse == "" {
warehouse = "COMPUTE_WH"
}
if role == "" {
role = "ACCOUNTADMIN"
}
// Snowflake DSN format: user:password@account/database/schema?warehouse=warehouse&role=role
dsn := fmt.Sprintf("%s:%s@%s/%s/%s?warehouse=%s&role=%s", user, password, account, database, schema, warehouse, role)
db, err := sqlx.ConnectContext(ctx, "snowflake", dsn)
if err != nil {
return nil, fmt.Errorf("unable to create connection: %w", err)
}
return db, nil
}
