88 lines
2.1 KiB
Go
88 lines
2.1 KiB
Go
// Copyright 2019 The Xorm Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package statements
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import (
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"fmt"
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"strconv"
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"strings"
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"xorm.io/xorm/internal/utils"
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"xorm.io/xorm/schemas"
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)
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// ConvertIDSQL converts SQL with id
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func (statement *Statement) ConvertIDSQL(sqlStr string) string {
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if statement.RefTable != nil {
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cols := statement.RefTable.PKColumns()
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if len(cols) == 0 {
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return ""
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}
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colstrs := statement.joinColumns(cols, false)
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sqls := utils.SplitNNoCase(sqlStr, " from ", 2)
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if len(sqls) != 2 {
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return ""
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}
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var b strings.Builder
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b.WriteString("SELECT ")
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pLimitN := statement.LimitN
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if pLimitN != nil && statement.dialect.URI().DBType == schemas.MSSQL {
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b.WriteString("TOP ")
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b.WriteString(strconv.Itoa(*pLimitN))
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b.WriteString(" ")
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}
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b.WriteString(colstrs)
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b.WriteString(" FROM ")
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b.WriteString(sqls[1])
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return b.String()
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}
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return ""
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}
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// ConvertUpdateSQL converts update SQL
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func (statement *Statement) ConvertUpdateSQL(sqlStr string) (string, string) {
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if statement.RefTable == nil || len(statement.RefTable.PrimaryKeys) != 1 {
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return "", ""
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}
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colstrs := statement.joinColumns(statement.RefTable.PKColumns(), true)
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sqls := utils.SplitNNoCase(sqlStr, "where", 2)
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if len(sqls) != 2 {
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if len(sqls) == 1 {
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return sqls[0], fmt.Sprintf("SELECT %v FROM %v",
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colstrs, statement.quote(statement.TableName()))
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}
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return "", ""
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}
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whereStr := sqls[1]
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// TODO: for postgres only, if any other database?
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var paraStr string
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if statement.dialect.URI().DBType == schemas.POSTGRES {
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paraStr = "$"
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} else if statement.dialect.URI().DBType == schemas.MSSQL {
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paraStr = ":"
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}
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if paraStr != "" {
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if strings.Contains(sqls[1], paraStr) {
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dollers := strings.Split(sqls[1], paraStr)
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whereStr = dollers[0]
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for i, c := range dollers[1:] {
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ccs := strings.SplitN(c, " ", 2)
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whereStr += fmt.Sprintf(paraStr+"%v %v", i+1, ccs[1])
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}
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}
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}
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return sqls[0], fmt.Sprintf("SELECT %v FROM %v WHERE %v",
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colstrs, statement.quote(statement.TableName()),
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whereStr)
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}
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