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https://github.com/googleapis/genai-toolbox.git
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1. `sql/database` provides a `Scan()`interface to scan query results into typed variables. Therefore we have to create a slice of typed variables (types retrieved from rows.ColumnTypes()) to pass them into `Scan()`. Using []byte works but makes the printing result different from other tools (e.g [1] instead of %!s(int32=1)] 2. MS SQL supports both named (e.g @name) and positional args (e.g @p2), so we have to check if the name is contained in the original statement before passing them into `db.Query()` as either named arg or as values.
137 lines
3.6 KiB
Go
137 lines
3.6 KiB
Go
// Copyright 2025 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cloudsqlmssql
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import (
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"context"
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"database/sql"
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"fmt"
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"slices"
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"strings"
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"cloud.google.com/go/cloudsqlconn"
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"cloud.google.com/go/cloudsqlconn/sqlserver/mssql"
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"github.com/googleapis/genai-toolbox/internal/sources"
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"go.opentelemetry.io/otel/trace"
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)
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const SourceKind string = "cloud-sql-mssql"
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// validate interface
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var _ sources.SourceConfig = Config{}
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type Config struct {
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// Cloud SQL MSSQL configs
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Name string `yaml:"name"`
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Kind string `yaml:"kind"`
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Project string `yaml:"project"`
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Region string `yaml:"region"`
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Instance string `yaml:"instance"`
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IPAddress string `yaml:"ipAddress"`
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IPType string `yaml:"ipType"`
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User string `yaml:"user"`
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Password string `yaml:"password"`
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Database string `yaml:"database"`
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}
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func (r Config) SourceConfigKind() string {
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// Returns Cloud SQL MSSQL source kind
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return SourceKind
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}
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func (r Config) Initialize(ctx context.Context, tracer trace.Tracer) (sources.Source, error) {
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// Initializes a Cloud SQL MSSQL source
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db, err := initCloudSQLMssqlConnection(ctx, tracer, r.Name, r.Project, r.Region, r.Instance, r.IPAddress, r.IPType, r.User, r.Password, r.Database)
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if err != nil {
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return nil, fmt.Errorf("unable to create db connection: %w", err)
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}
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// Verify db connection
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err = db.Ping()
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if err != nil {
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return nil, fmt.Errorf("unable to connect successfully: %w", err)
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}
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s := &Source{
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Name: r.Name,
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Kind: SourceKind,
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Db: db,
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}
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return s, nil
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}
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var _ sources.Source = &Source{}
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type Source struct {
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// Cloud SQL MSSQL struct with connection pool
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Name string `yaml:"name"`
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Kind string `yaml:"kind"`
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Db *sql.DB
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}
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func (s *Source) SourceKind() string {
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// Returns Cloud SQL MSSQL source kind
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return SourceKind
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}
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func (s *Source) MSSQLDB() *sql.DB {
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// Returns a Cloud SQL MSSQL database connection pool
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return s.Db
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}
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func getDialOpts(ipType string) ([]cloudsqlconn.DialOption, error) {
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switch strings.ToLower(ipType) {
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case "private":
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return []cloudsqlconn.DialOption{cloudsqlconn.WithPrivateIP()}, nil
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case "public":
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return []cloudsqlconn.DialOption{cloudsqlconn.WithPublicIP()}, nil
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default:
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return nil, fmt.Errorf("invalid ipType %s", ipType)
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}
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}
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func initCloudSQLMssqlConnection(ctx context.Context, tracer trace.Tracer, name, project, region, instance, ipAddress, ipType, user, pass, dbname string) (*sql.DB, error) {
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//nolint:all // Reassigned ctx
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ctx, span := sources.InitConnectionSpan(ctx, tracer, SourceKind, name)
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defer span.End()
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// Create dsn
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dsn := fmt.Sprintf("sqlserver://%s:%s@%s?database=%s&cloudsql=%s:%s:%s", user, pass, ipAddress, dbname, project, region, instance)
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// Get dial options
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dialOpts, err := getDialOpts(ipType)
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if err != nil {
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return nil, err
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}
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// Register sql server driver
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if !slices.Contains(sql.Drivers(), "cloudsql-sqlserver-driver") {
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_, err := mssql.RegisterDriver("cloudsql-sqlserver-driver", cloudsqlconn.WithDefaultDialOptions(dialOpts...))
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if err != nil {
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return nil, err
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}
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}
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// Open database connection
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db, err := sql.Open(
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"cloudsql-sqlserver-driver",
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dsn,
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)
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if err != nil {
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return nil, err
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}
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return db, nil
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}
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