clickhousesql.go•5.95 kB
// Copyright 2025 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 clickhouse
import (
"context"
"database/sql"
"fmt"
yaml "github.com/goccy/go-yaml"
"github.com/googleapis/genai-toolbox/internal/sources"
"github.com/googleapis/genai-toolbox/internal/tools"
)
type compatibleSource interface {
ClickHousePool() *sql.DB
}
var compatibleSources = []string{"clickhouse"}
const sqlKind string = "clickhouse-sql"
func init() {
if !tools.Register(sqlKind, newSQLConfig) {
panic(fmt.Sprintf("tool kind %q already registered", sqlKind))
}
}
func newSQLConfig(ctx context.Context, name string, decoder *yaml.Decoder) (tools.ToolConfig, 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"`
Source string `yaml:"source" validate:"required"`
Description string `yaml:"description" validate:"required"`
Statement string `yaml:"statement" validate:"required"`
AuthRequired []string `yaml:"authRequired"`
Parameters tools.Parameters `yaml:"parameters"`
TemplateParameters tools.Parameters `yaml:"templateParameters"`
}
var _ tools.ToolConfig = Config{}
func (cfg Config) ToolConfigKind() string {
return sqlKind
}
func (cfg Config) Initialize(srcs map[string]sources.Source) (tools.Tool, error) {
rawS, ok := srcs[cfg.Source]
if !ok {
return nil, fmt.Errorf("no source named %q configured", cfg.Source)
}
s, ok := rawS.(compatibleSource)
if !ok {
return nil, fmt.Errorf("invalid source for %q tool: source kind must be one of %q", sqlKind, compatibleSources)
}
allParameters, paramManifest, _ := tools.ProcessParameters(cfg.TemplateParameters, cfg.Parameters)
mcpManifest := tools.GetMcpManifest(cfg.Name, cfg.Description, cfg.AuthRequired, allParameters)
t := Tool{
Name: cfg.Name,
Kind: sqlKind,
Parameters: cfg.Parameters,
TemplateParameters: cfg.TemplateParameters,
AllParams: allParameters,
Statement: cfg.Statement,
AuthRequired: cfg.AuthRequired,
Pool: s.ClickHousePool(),
manifest: tools.Manifest{Description: cfg.Description, Parameters: paramManifest, AuthRequired: cfg.AuthRequired},
mcpManifest: mcpManifest,
}
return t, nil
}
var _ tools.Tool = Tool{}
type Tool struct {
Name string `yaml:"name"`
Kind string `yaml:"kind"`
AuthRequired []string `yaml:"authRequired"`
Parameters tools.Parameters `yaml:"parameters"`
TemplateParameters tools.Parameters `yaml:"templateParameters"`
AllParams tools.Parameters `yaml:"allParams"`
Pool *sql.DB
Statement string
manifest tools.Manifest
mcpManifest tools.McpManifest
}
func (t Tool) Invoke(ctx context.Context, params tools.ParamValues, token tools.AccessToken) (any, error) {
paramsMap := params.AsMap()
newStatement, err := tools.ResolveTemplateParams(t.TemplateParameters, t.Statement, paramsMap)
if err != nil {
return nil, fmt.Errorf("unable to extract template params: %w", err)
}
newParams, err := tools.GetParams(t.Parameters, paramsMap)
if err != nil {
return nil, fmt.Errorf("unable to extract standard params: %w", err)
}
sliceParams := newParams.AsSlice()
results, err := t.Pool.QueryContext(ctx, newStatement, sliceParams...)
if err != nil {
return nil, fmt.Errorf("unable to execute query: %w", err)
}
cols, err := results.Columns()
if err != nil {
return nil, fmt.Errorf("unable to retrieve rows column name: %w", err)
}
rawValues := make([]any, len(cols))
values := make([]any, len(cols))
for i := range rawValues {
values[i] = &rawValues[i]
}
colTypes, err := results.ColumnTypes()
if err != nil {
return nil, fmt.Errorf("unable to get column types: %w", err)
}
var out []any
for results.Next() {
err := results.Scan(values...)
if err != nil {
return nil, fmt.Errorf("unable to parse row: %w", err)
}
vMap := make(map[string]any)
for i, name := range cols {
switch colTypes[i].DatabaseTypeName() {
case "String", "FixedString":
if rawValues[i] != nil {
// Handle potential []byte to string conversion if needed
if b, ok := rawValues[i].([]byte); ok {
vMap[name] = string(b)
} else {
vMap[name] = rawValues[i]
}
} else {
vMap[name] = nil
}
default:
vMap[name] = rawValues[i]
}
}
out = append(out, vMap)
}
err = results.Close()
if err != nil {
return nil, fmt.Errorf("unable to close rows: %w", err)
}
if err := results.Err(); err != nil {
return nil, fmt.Errorf("errors encountered by results.Scan: %w", err)
}
return out, nil
}
func (t Tool) ParseParams(data map[string]any, claims map[string]map[string]any) (tools.ParamValues, error) {
return tools.ParseParams(t.AllParams, data, claims)
}
func (t Tool) Manifest() tools.Manifest {
return t.manifest
}
func (t Tool) McpManifest() tools.McpManifest {
return t.mcpManifest
}
func (t Tool) Authorized(verifiedAuthServices []string) bool {
return tools.IsAuthorized(t.AuthRequired, verifiedAuthServices)
}
func (t Tool) RequiresClientAuthorization() bool {
return false
}