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