gf/database/gdb/gdb_driver_oracle.go

384 lines
10 KiB
Go

// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
//
// Note:
// 1. It needs manually import: _ "github.com/mattn/go-oci8"
// 2. It does not support Save/Replace features.
// 3. It does not support LastInsertId.
package gdb
import (
"context"
"database/sql"
"fmt"
"reflect"
"strconv"
"strings"
"time"
"github.com/gogf/gf/errors/gerror"
"github.com/gogf/gf/internal/intlog"
"github.com/gogf/gf/text/gregex"
"github.com/gogf/gf/text/gstr"
"github.com/gogf/gf/util/gconv"
)
// DriverOracle is the driver for oracle database.
type DriverOracle struct {
*Core
}
const (
tableAlias1 = "GFORM1"
tableAlias2 = "GFORM2"
)
// New creates and returns a database object for oracle.
// It implements the interface of gdb.Driver for extra database driver installation.
func (d *DriverOracle) New(core *Core, node *ConfigNode) (DB, error) {
return &DriverOracle{
Core: core,
}, nil
}
// Open creates and returns a underlying sql.DB object for oracle.
func (d *DriverOracle) Open(config *ConfigNode) (*sql.DB, error) {
var source string
if config.LinkInfo != "" {
source = config.LinkInfo
} else {
source = fmt.Sprintf(
"%s/%s@%s:%s/%s",
config.User, config.Pass, config.Host, config.Port, config.Name,
)
}
intlog.Printf("Open: %s", source)
if db, err := sql.Open("oci8", source); err == nil {
return db, nil
} else {
return nil, err
}
}
// FilteredLinkInfo retrieves and returns filtered `linkInfo` that can be using for
// logging or tracing purpose.
func (d *DriverOracle) FilteredLinkInfo() string {
linkInfo := d.GetConfig().LinkInfo
if linkInfo == "" {
return ""
}
s, _ := gregex.ReplaceString(
`(.+?)\s*/\s*(.+)\s*@\s*(.+)\s*:\s*(\d+)\s*/\s*(.+)`,
`$1/xxx@$3:$4/$5`,
linkInfo,
)
return s
}
// GetChars returns the security char for this type of database.
func (d *DriverOracle) GetChars() (charLeft string, charRight string) {
return "\"", "\""
}
// HandleSqlBeforeCommit deals with the sql string before commits it to underlying sql driver.
func (d *DriverOracle) HandleSqlBeforeCommit(ctx context.Context, link Link, sql string, args []interface{}) (newSql string, newArgs []interface{}) {
var index int
// Convert place holder char '?' to string ":vx".
newSql, _ = gregex.ReplaceStringFunc("\\?", sql, func(s string) string {
index++
return fmt.Sprintf(":v%d", index)
})
newSql, _ = gregex.ReplaceString("\"", "", newSql)
// Handle string datetime argument.
for i, v := range args {
if reflect.TypeOf(v).Kind() == reflect.String {
valueStr := gconv.String(v)
if gregex.IsMatchString(`^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$`, valueStr) {
//args[i] = fmt.Sprintf(`TO_DATE('%s','yyyy-MM-dd HH:MI:SS')`, valueStr)
args[i], _ = time.ParseInLocation("2006-01-02 15:04:05", valueStr, time.Local)
}
}
}
newSql = d.parseSql(newSql)
newArgs = args
return
}
// parseSql does some replacement of the sql before commits it to underlying driver,
// for support of oracle server.
func (d *DriverOracle) parseSql(sql string) string {
var (
patten = `^\s*(?i)(SELECT)|(LIMIT\s*(\d+)\s*,{0,1}\s*(\d*))`
allMatch, _ = gregex.MatchAllString(patten, sql)
)
if len(allMatch) == 0 {
return sql
}
var (
index = 0
keyword = strings.ToUpper(strings.TrimSpace(allMatch[index][0]))
)
index++
switch keyword {
case "SELECT":
if len(allMatch) < 2 || strings.HasPrefix(allMatch[index][0], "LIMIT") == false {
break
}
if gregex.IsMatchString("((?i)SELECT)(.+)((?i)LIMIT)", sql) == false {
break
}
queryExpr, _ := gregex.MatchString("((?i)SELECT)(.+)((?i)LIMIT)", sql)
if len(queryExpr) != 4 ||
strings.EqualFold(queryExpr[1], "SELECT") == false ||
strings.EqualFold(queryExpr[3], "LIMIT") == false {
break
}
first, limit := 0, 0
for i := 1; i < len(allMatch[index]); i++ {
if len(strings.TrimSpace(allMatch[index][i])) == 0 {
continue
}
if strings.HasPrefix(allMatch[index][i], "LIMIT") {
if allMatch[index][i+2] != "" {
first, _ = strconv.Atoi(allMatch[index][i+1])
limit, _ = strconv.Atoi(allMatch[index][i+2])
} else {
limit, _ = strconv.Atoi(allMatch[index][i+1])
}
break
}
}
sql = fmt.Sprintf(
"SELECT * FROM "+
"(SELECT GFORM.*, ROWNUM ROWNUM_ FROM (%s %s) GFORM WHERE ROWNUM <= %d)"+
" WHERE ROWNUM_ >= %d",
queryExpr[1], queryExpr[2], limit, first,
)
}
return sql
}
// Tables retrieves and returns the tables of current schema.
// It's mainly used in cli tool chain for automatically generating the models.
// Note that it ignores the parameter `schema` in oracle database, as it is not necessary.
func (d *DriverOracle) Tables(ctx context.Context, schema ...string) (tables []string, err error) {
var result Result
result, err = d.DoGetAll(ctx, nil, "SELECT TABLE_NAME FROM USER_TABLES ORDER BY TABLE_NAME")
if err != nil {
return
}
for _, m := range result {
for _, v := range m {
tables = append(tables, v.String())
}
}
return
}
// TableFields retrieves and returns the fields information of specified table of current schema.
//
// Also see DriverMysql.TableFields.
func (d *DriverOracle) TableFields(ctx context.Context, table string, schema ...string) (fields map[string]*TableField, err error) {
charL, charR := d.GetChars()
table = gstr.Trim(table, charL+charR)
if gstr.Contains(table, " ") {
return nil, gerror.New("function TableFields supports only single table operations")
}
useSchema := d.db.GetSchema()
if len(schema) > 0 && schema[0] != "" {
useSchema = schema[0]
}
tableFieldsCacheKey := fmt.Sprintf(
`oracle_table_fields_%s_%s@group:%s`,
table, useSchema, d.GetGroup(),
)
v := tableFieldsMap.GetOrSetFuncLock(tableFieldsCacheKey, func() interface{} {
var (
result Result
link, err = d.SlaveLink(useSchema)
structureSql = fmt.Sprintf(`
SELECT
COLUMN_NAME AS FIELD,
CASE DATA_TYPE
WHEN 'NUMBER' THEN DATA_TYPE||'('||DATA_PRECISION||','||DATA_SCALE||')'
WHEN 'FLOAT' THEN DATA_TYPE||'('||DATA_PRECISION||','||DATA_SCALE||')'
ELSE DATA_TYPE||'('||DATA_LENGTH||')' END AS TYPE
FROM USER_TAB_COLUMNS WHERE TABLE_NAME = '%s' ORDER BY COLUMN_ID`,
strings.ToUpper(table),
)
)
if err != nil {
return nil
}
structureSql, _ = gregex.ReplaceString(`[\n\r\s]+`, " ", gstr.Trim(structureSql))
result, err = d.DoGetAll(ctx, link, structureSql)
if err != nil {
return nil
}
fields = make(map[string]*TableField)
for i, m := range result {
fields[strings.ToLower(m["FIELD"].String())] = &TableField{
Index: i,
Name: strings.ToLower(m["FIELD"].String()),
Type: strings.ToLower(m["TYPE"].String()),
}
}
return fields
})
if v != nil {
fields = v.(map[string]*TableField)
}
return
}
func (d *DriverOracle) getTableUniqueIndex(table string) (fields map[string]map[string]string, err error) {
table = strings.ToUpper(table)
v, _ := internalCache.GetOrSetFunc(
"table_unique_index_"+table,
func() (interface{}, error) {
res := (Result)(nil)
res, err = d.db.GetAll(fmt.Sprintf(`
SELECT INDEX_NAME,COLUMN_NAME,CHAR_LENGTH FROM USER_IND_COLUMNS
WHERE TABLE_NAME = '%s'
AND INDEX_NAME IN(SELECT INDEX_NAME FROM USER_INDEXES WHERE TABLE_NAME='%s' AND UNIQUENESS='UNIQUE')
ORDER BY INDEX_NAME,COLUMN_POSITION`, table, table))
if err != nil {
return nil, err
}
fields := make(map[string]map[string]string)
for _, v := range res {
mm := make(map[string]string)
mm[v["COLUMN_NAME"].String()] = v["CHAR_LENGTH"].String()
fields[v["INDEX_NAME"].String()] = mm
}
return fields, nil
}, 0)
if err == nil {
fields = v.(map[string]map[string]string)
}
return
}
func (d *DriverOracle) DoInsert(ctx context.Context, link Link, table string, list interface{}, option int, batch int) (result sql.Result, err error) {
var (
keys []string
values []string
params []interface{}
)
listMap := (List)(nil)
switch v := list.(type) {
case Result:
listMap = v.List()
case Record:
listMap = List{v.Map()}
case List:
listMap = v
case Map:
listMap = List{v}
default:
var (
rv = reflect.ValueOf(list)
kind = rv.Kind()
)
if kind == reflect.Ptr {
rv = rv.Elem()
kind = rv.Kind()
}
switch kind {
case reflect.Slice, reflect.Array:
listMap = make(List, rv.Len())
for i := 0; i < rv.Len(); i++ {
listMap[i] = ConvertDataForTableRecord(rv.Index(i).Interface())
}
case reflect.Map:
fallthrough
case reflect.Struct:
listMap = List{ConvertDataForTableRecord(list)}
default:
return result, gerror.New(fmt.Sprint("unsupported list type:", kind))
}
}
if len(listMap) < 1 {
return result, gerror.New("empty data list")
}
if link == nil {
if link, err = d.MasterLink(); err != nil {
return
}
}
// Retrieve the table fields and length.
holders := []string(nil)
for k, _ := range listMap[0] {
keys = append(keys, k)
holders = append(holders, "?")
}
var (
batchResult = new(SqlResult)
charL, charR = d.db.GetChars()
keyStr = charL + strings.Join(keys, charL+","+charR) + charR
valueHolderStr = strings.Join(holders, ",")
)
if option != insertOptionDefault {
for _, v := range listMap {
r, err := d.DoInsert(ctx, link, table, v, option, 1)
if err != nil {
return r, err
}
if n, err := r.RowsAffected(); err != nil {
return r, err
} else {
batchResult.result = r
batchResult.affected += n
}
}
return batchResult, nil
}
if batch <= 0 {
batch = defaultBatchNumber
}
// Format "INSERT...INTO..." statement.
intoStr := make([]string, 0)
for i := 0; i < len(listMap); i++ {
for _, k := range keys {
params = append(params, listMap[i][k])
}
values = append(values, valueHolderStr)
intoStr = append(intoStr, fmt.Sprintf(" INTO %s(%s) VALUES(%s) ", table, keyStr, valueHolderStr))
if len(intoStr) == batch {
r, err := d.DoExec(ctx, link, fmt.Sprintf("INSERT ALL %s SELECT * FROM DUAL", strings.Join(intoStr, " ")), params...)
if err != nil {
return r, err
}
if n, err := r.RowsAffected(); err != nil {
return r, err
} else {
batchResult.result = r
batchResult.affected += n
}
params = params[:0]
intoStr = intoStr[:0]
}
}
// The leftover data.
if len(intoStr) > 0 {
r, err := d.DoExec(ctx, link, fmt.Sprintf("INSERT ALL %s SELECT * FROM DUAL", strings.Join(intoStr, " ")), params...)
if err != nil {
return r, err
}
if n, err := r.RowsAffected(); err != nil {
return r, err
} else {
batchResult.result = r
batchResult.affected += n
}
}
return batchResult, nil
}