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database.go
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database.go
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package clickhouse
import (
"context"
"database/sql"
"fmt"
"reflect"
"strconv"
"strings"
"time"
_ "github.com/abulo/clickhouse-go"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"github.com/opentracing/opentracing-go/log"
)
// Connection 链接
type Connection interface {
Exec(ctx context.Context, query string, args ...interface{}) (sql.Result, error)
Query(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error)
NewQuery(ctx context.Context) *QueryBuilder
GetLastSql() Sql
LastSql(query string, args ...interface{})
}
// Sql sql语句
type Sql struct {
Sql string
Args []interface{}
CostTime time.Duration
}
// QueryDb mysql 配置
type QueryDb struct {
db *sql.DB
lastsql Sql
config *Config
}
//QueryTx 事务
type QueryTx struct {
Tx *sql.Tx
lastsql Sql
config *Config
}
//NewQuery 生成一个新的查询构造器
func (querydb *QueryDb) NewQuery(ctx context.Context) *QueryBuilder {
if ctx == nil || ctx.Err() != nil {
ctx = context.TODO()
}
return &QueryBuilder{connection: querydb, ctx: ctx}
}
//Begin 开启一个事务
func (querydb *QueryDb) Begin() (*QueryTx, error) {
tx, err := querydb.db.Begin()
if err != nil {
return nil, err
}
return &QueryTx{Tx: tx, config: querydb.config}, nil
}
//Exec 复用执行语句
func (querydb *QueryDb) Exec(ctx context.Context, query string, args ...interface{}) (sql.Result, error) {
querydb.lastsql.Sql = query
querydb.lastsql.Args = args
start := time.Now()
defer func() {
querydb.lastsql.CostTime = time.Since(start)
}()
if ctx == nil || ctx.Err() != nil {
ctx = context.TODO()
}
if trace {
if parentSpan := opentracing.SpanFromContext(ctx); parentSpan != nil {
parentCtx := parentSpan.Context()
span := opentracing.StartSpan("clickhouse", opentracing.ChildOf(parentCtx))
ext.SpanKindRPCClient.Set(span)
ext.PeerService.Set(span, "clickhouse")
span.LogFields(log.String("sql", query))
span.LogFields(log.Object("param", args))
defer span.Finish()
ctx = opentracing.ContextWithSpan(ctx, span)
}
}
var res sql.Result
var err error
//添加预处理
stmt, err := querydb.db.PrepareContext(ctx, query)
if err != nil {
querydb.db.PingContext(ctx)
return res, err
}
res, err = stmt.ExecContext(ctx, args...)
querydb.db.PingContext(ctx)
return res, err
}
//Query 复用查询语句
func (querydb *QueryDb) Query(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error) {
querydb.lastsql.Sql = query
querydb.lastsql.Args = args
start := time.Now()
defer func() {
querydb.lastsql.CostTime = time.Since(start)
}()
if ctx == nil || ctx.Err() != nil {
ctx = context.TODO()
}
if trace {
if parentSpan := opentracing.SpanFromContext(ctx); parentSpan != nil {
parentCtx := parentSpan.Context()
span := opentracing.StartSpan("clickhouse", opentracing.ChildOf(parentCtx))
ext.SpanKindRPCClient.Set(span)
ext.PeerService.Set(span, "clickhouse")
span.LogFields(log.String("sql", query))
span.LogFields(log.Object("param", args))
defer span.Finish()
ctx = opentracing.ContextWithSpan(ctx, span)
}
}
var res *sql.Rows
var err error
//添加预处理
stmt, err := querydb.db.PrepareContext(ctx, query)
if err != nil {
querydb.db.PingContext(ctx)
return res, err
}
res, err = stmt.QueryContext(ctx, args...)
querydb.db.PingContext(ctx)
return res, err
}
//GetLastSql 获取sql语句
func (querydb *QueryDb) GetLastSql() Sql {
return querydb.lastsql
}
// Commit 事务提交
func (querytx *QueryTx) Commit() error {
return querytx.Tx.Commit()
}
// Rollback 事务回滚
func (querytx *QueryTx) Rollback() error {
return querytx.Tx.Rollback()
}
// NewQuery 生成一个新的查询构造器
func (querytx *QueryTx) NewQuery(ctx context.Context) *QueryBuilder {
if ctx == nil || ctx.Err() != nil {
ctx = context.TODO()
}
return &QueryBuilder{connection: querytx, ctx: ctx}
}
//Exec 复用执行语句
func (querytx *QueryTx) Exec(ctx context.Context, query string, args ...interface{}) (sql.Result, error) {
querytx.lastsql.Sql = query
querytx.lastsql.Args = args
start := time.Now()
defer func() {
querytx.lastsql.CostTime = time.Since(start)
}()
if ctx == nil || ctx.Err() != nil {
ctx = context.TODO()
}
if trace {
if parentSpan := opentracing.SpanFromContext(ctx); parentSpan != nil {
parentCtx := parentSpan.Context()
span := opentracing.StartSpan("clickhouse", opentracing.ChildOf(parentCtx))
ext.SpanKindRPCClient.Set(span)
ext.PeerService.Set(span, "clickhouse")
span.LogFields(log.String("sql", query))
span.LogFields(log.Object("param", args))
defer span.Finish()
ctx = opentracing.ContextWithSpan(ctx, span)
}
}
var res sql.Result
var err error
//添加预处理
stmt, err := querytx.Tx.PrepareContext(ctx, query)
if err != nil {
return res, err
}
res, err = stmt.ExecContext(ctx, args...)
return res, err
}
//Query 复用查询语句
func (querytx *QueryTx) Query(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error) {
querytx.lastsql.Sql = query
querytx.lastsql.Args = args
start := time.Now()
defer func() {
querytx.lastsql.CostTime = time.Since(start)
}()
if ctx == nil || ctx.Err() != nil {
ctx = context.TODO()
}
if trace {
if parentSpan := opentracing.SpanFromContext(ctx); parentSpan != nil {
parentCtx := parentSpan.Context()
span := opentracing.StartSpan("clickhouse", opentracing.ChildOf(parentCtx))
ext.SpanKindRPCClient.Set(span)
ext.PeerService.Set(span, "clickhouse")
span.LogFields(log.String("sql", query))
span.LogFields(log.Object("param", args))
defer span.Finish()
ctx = opentracing.ContextWithSpan(ctx, span)
}
}
var res *sql.Rows
var err error
//添加预处理
stmt, err := querytx.Tx.PrepareContext(ctx, query)
if err != nil {
return res, err
}
res, err = stmt.QueryContext(ctx, args...)
return res, err
}
//GetLastSql 获取sql语句
func (querytx *QueryTx) GetLastSql() Sql {
return querytx.lastsql
}
func (querytx *QueryTx) LastSql(query string, args ...interface{}) {
querytx.lastsql.Sql = query
querytx.lastsql.Args = args
}
func (querydb *QueryDb) LastSql(query string, args ...interface{}) {
querydb.lastsql.Sql = query
querydb.lastsql.Args = args
}
// ToString sql语句转出string
func (sqlRaw Sql) ToString() string {
s := sqlRaw.Sql
for _, v := range sqlRaw.Args {
if isNilFixed(v) {
v = "NULL"
} else {
switch reflect.ValueOf(v).Interface().(type) {
case NullString:
v = v.(NullString).Result()
case NullInt64:
v = v.(NullInt64).Result()
case NullInt32:
v = v.(NullInt32).Result()
case NullFloat64:
v = v.(NullFloat64).Result()
case NullBool:
v = v.(NullBool).Result()
case NullDateTime:
v = v.(NullDateTime).Result()
case NullDate:
v = v.(NullDate).Result()
}
}
s = convert(s, v)
}
return s
}
func isNilFixed(i interface{}) bool {
if i == nil {
return true
}
switch reflect.TypeOf(i).Kind() {
case reflect.Ptr, reflect.Map, reflect.Array, reflect.Chan, reflect.Slice:
return reflect.ValueOf(i).IsNil()
}
return false
}
func convert(s string, v interface{}) string {
switch reflect.ValueOf(v).Interface().(type) {
case string:
if val := fmt.Sprintf("%v", v); val == "NULL" {
return strings.Replace(s, "?", fmt.Sprintf("%v", v), 1)
} else {
return strings.Replace(s, "?", strconv.Quote(fmt.Sprintf("%v", v)), 1)
}
}
return strings.Replace(s, "?", fmt.Sprintf("%v", v), 1)
}
// ToJson sql语句转出json
func (sql Sql) ToJson() string {
return fmt.Sprintf(`{"sql":%s,"costtime":"%s"}`, strconv.Quote(sql.ToString()), sql.CostTime)
}