hoteas
650fafad1a
- 实现了标识符处理器，统一处理表名、字段名的前缀添加和引号转换 - 添加对 MySQL、PostgreSQL、SQLite 三种数据库方言的支持 - 引入 ProcessTableName、ProcessColumn、ProcessConditionString 等方法处理标识符 - 为 HoTimeDB 添加 T() 和 C() 辅助方法用于手动构建 SQL 查询 - 重构 CRUD 操作中的表名和字段名处理逻辑，统一使用标识符处理器 - 添加完整的单元测试验证不同数据库方言下的标识符处理功能 - 优化 JOIN 操作中表名和条件字符串的处理方式
548 lines
13 KiB
Go
548 lines
13 KiB
Go
package db
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import (
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. "code.hoteas.com/golang/hotime/common"
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"reflect"
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"sort"
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"strings"
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)
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// 条件关键字
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var condition = []string{"AND", "OR"}
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// 特殊关键字（支持大小写）
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var vcond = []string{"GROUP", "ORDER", "LIMIT", "DISTINCT", "HAVING", "OFFSET"}
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// normalizeKey 标准化关键字（转大写）
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func normalizeKey(k string) string {
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upper := strings.ToUpper(k)
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for _, v := range vcond {
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if upper == v {
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return v
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}
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}
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for _, v := range condition {
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if upper == v {
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return v
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}
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}
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return k
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}
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// isConditionKey 判断是否是条件关键字
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func isConditionKey(k string) bool {
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upper := strings.ToUpper(k)
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for _, v := range condition {
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if upper == v {
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return true
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}
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}
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return false
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}
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// isVcondKey 判断是否是特殊关键字
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func isVcondKey(k string) bool {
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upper := strings.ToUpper(k)
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for _, v := range vcond {
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if upper == v {
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return true
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}
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}
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return false
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}
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// where 语句解析
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func (that *HoTimeDB) where(data Map) (string, []interface{}) {
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where := ""
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res := make([]interface{}, 0)
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// 标准化 Map 的 key（大小写兼容）
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normalizedData := Map{}
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for k, v := range data {
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normalizedData[normalizeKey(k)] = v
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}
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data = normalizedData
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// 收集所有 key 并排序
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testQu := []string{}
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for key := range data {
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testQu = append(testQu, key)
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}
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sort.Strings(testQu)
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// 追踪普通条件数量，用于自动添加 AND
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normalCondCount := 0
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for _, k := range testQu {
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v := data[k]
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// 检查是否是 AND/OR 条件关键字
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if isConditionKey(k) {
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tw, ts := that.cond(strings.ToUpper(k), v.(Map))
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where += tw
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res = append(res, ts...)
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continue
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}
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// 检查是否是特殊关键字（GROUP, ORDER, LIMIT 等）
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if isVcondKey(k) {
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continue // 特殊关键字在后面单独处理
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}
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// 处理普通条件字段
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// 空切片的 IN 条件应该生成永假条件（1=0），而不是跳过
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if v != nil && reflect.ValueOf(v).Type().String() == "common.Slice" && len(v.(Slice)) == 0 {
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// 检查是否是 NOT IN（带 [!] 后缀）- NOT IN 空数组永真，跳过即可
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if !strings.HasSuffix(k, "[!]") {
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// IN 空数组 -> 生成永假条件
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if normalCondCount > 0 {
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where += " AND "
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}
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where += "1=0 "
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normalCondCount++
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}
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continue
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}
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if v != nil && strings.Contains(reflect.ValueOf(v).Type().String(), "[]") && len(ObjToSlice(v)) == 0 {
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// 检查是否是 NOT IN（带 [!] 后缀）- NOT IN 空数组永真，跳过即可
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if !strings.HasSuffix(k, "[!]") {
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// IN 空数组 -> 生成永假条件
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if normalCondCount > 0 {
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where += " AND "
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}
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where += "1=0 "
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normalCondCount++
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}
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continue
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}
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tv, vv := that.varCond(k, v)
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if tv != "" {
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// 自动添加 AND 连接符
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if normalCondCount > 0 {
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where += " AND "
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}
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where += tv
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normalCondCount++
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res = append(res, vv...)
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}
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}
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// 添加 WHERE 关键字
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// 先去除首尾空格，检查是否有实际条件内容
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trimmedWhere := strings.TrimSpace(where)
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if len(trimmedWhere) != 0 {
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hasWhere := true
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for _, v := range vcond {
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if strings.Index(trimmedWhere, v) == 0 {
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hasWhere = false
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}
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}
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if hasWhere {
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where = " WHERE " + trimmedWhere + " "
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}
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} else {
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// 没有实际条件内容，重置 where
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where = ""
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}
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// 处理特殊字符（按固定顺序：GROUP, HAVING, ORDER, LIMIT, OFFSET）
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specialOrder := []string{"GROUP", "HAVING", "ORDER", "LIMIT", "OFFSET", "DISTINCT"}
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for _, vcondKey := range specialOrder {
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v, exists := data[vcondKey]
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if !exists {
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continue
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}
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switch vcondKey {
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case "GROUP":
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where += " GROUP BY "
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where += that.formatVcondValue(v)
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case "HAVING":
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// HAVING 条件处理
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if havingMap, ok := v.(Map); ok {
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havingWhere, havingRes := that.cond("AND", havingMap)
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if havingWhere != "" {
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where += " HAVING " + strings.TrimSpace(havingWhere) + " "
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res = append(res, havingRes...)
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}
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}
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case "ORDER":
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where += " ORDER BY "
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where += that.formatVcondValue(v)
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case "LIMIT":
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where += " LIMIT "
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where += that.formatVcondValue(v)
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case "OFFSET":
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where += " OFFSET " + ObjToStr(v) + " "
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case "DISTINCT":
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// DISTINCT 通常在 SELECT 中处理，这里暂时忽略
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}
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}
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return where, res
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}
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// formatVcondValue 格式化特殊关键字的值
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func (that *HoTimeDB) formatVcondValue(v interface{}) string {
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result := ""
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if reflect.ValueOf(v).Type().String() == "common.Slice" || strings.Contains(reflect.ValueOf(v).Type().String(), "[]") {
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vs := ObjToSlice(v)
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for i := 0; i < len(vs); i++ {
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result += " " + vs.GetString(i) + " "
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if len(vs) != i+1 {
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result += ", "
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}
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}
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} else {
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result += " " + ObjToStr(v) + " "
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}
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return result
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}
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// varCond 变量条件解析
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func (that *HoTimeDB) varCond(k string, v interface{}) (string, []interface{}) {
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where := ""
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res := make([]interface{}, 0)
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length := len(k)
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processor := that.GetProcessor()
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if k == "[#]" {
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k = strings.Replace(k, "[#]", "", -1)
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where += " " + ObjToStr(v) + " "
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} else if k == "[##]" {
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// 直接添加 SQL 片段（key 为 [##] 时）
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where += " " + ObjToStr(v) + " "
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} else if length > 0 && strings.Contains(k, "[") && k[length-1] == ']' {
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def := false
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switch Substr(k, length-3, 3) {
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case "[>]":
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k = strings.Replace(k, "[>]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += k + ">? "
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res = append(res, v)
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case "[<]":
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k = strings.Replace(k, "[<]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += k + "<? "
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res = append(res, v)
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case "[!]":
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k = strings.Replace(k, "[!]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where, res = that.notIn(k, v, where, res)
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case "[#]":
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k = strings.Replace(k, "[#]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += " " + k + "=" + ObjToStr(v) + " "
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case "[##]": // 直接添加value到sql，需要考虑防注入
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where += " " + ObjToStr(v)
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case "[#!]":
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k = strings.Replace(k, "[#!]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += " " + k + "!=" + ObjToStr(v) + " "
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case "[!#]":
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k = strings.Replace(k, "[!#]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += " " + k + "!=" + ObjToStr(v) + " "
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case "[~]":
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k = strings.Replace(k, "[~]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += k + " LIKE ? "
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v = "%" + ObjToStr(v) + "%"
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res = append(res, v)
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case "[!~]": // 左边任意
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k = strings.Replace(k, "[!~]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += k + " LIKE ? "
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v = "%" + ObjToStr(v) + ""
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res = append(res, v)
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case "[~!]": // 右边任意
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k = strings.Replace(k, "[~!]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += k + " LIKE ? "
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v = ObjToStr(v) + "%"
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res = append(res, v)
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case "[~~]": // 手动任意
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k = strings.Replace(k, "[~~]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += k + " LIKE ? "
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res = append(res, v)
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default:
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def = true
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}
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if def {
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switch Substr(k, length-4, 4) {
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case "[>=]":
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k = strings.Replace(k, "[>=]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += k + ">=? "
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res = append(res, v)
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case "[<=]":
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k = strings.Replace(k, "[<=]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += k + "<=? "
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res = append(res, v)
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case "[><]":
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k = strings.Replace(k, "[><]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += k + " NOT BETWEEN ? AND ? "
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vs := ObjToSlice(v)
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res = append(res, vs[0])
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res = append(res, vs[1])
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case "[<>]":
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k = strings.Replace(k, "[<>]", "", -1)
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k = processor.ProcessColumn(k) + " "
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where += k + " BETWEEN ? AND ? "
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vs := ObjToSlice(v)
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res = append(res, vs[0])
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res = append(res, vs[1])
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default:
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where, res = that.handleDefaultCondition(k, v, where, res)
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}
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}
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} else {
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where, res = that.handlePlainField(k, v, where, res)
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}
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return where, res
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}
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// handleDefaultCondition 处理默认条件（带方括号但不是特殊操作符）
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func (that *HoTimeDB) handleDefaultCondition(k string, v interface{}, where string, res []interface{}) (string, []interface{}) {
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processor := that.GetProcessor()
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k = processor.ProcessColumn(k) + " "
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if reflect.ValueOf(v).Type().String() == "common.Slice" || strings.Contains(reflect.ValueOf(v).Type().String(), "[]") {
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vs := ObjToSlice(v)
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if len(vs) == 0 {
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// IN 空数组 -> 生成永假条件
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where += "1=0 "
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return where, res
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}
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if len(vs) == 1 {
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where += k + "=? "
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res = append(res, vs[0])
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return where, res
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}
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// IN 优化：连续整数转为 BETWEEN
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where, res = that.optimizeInCondition(k, vs, where, res)
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} else {
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where += k + "=? "
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res = append(res, v)
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}
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return where, res
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}
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// handlePlainField 处理普通字段（无方括号）
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func (that *HoTimeDB) handlePlainField(k string, v interface{}, where string, res []interface{}) (string, []interface{}) {
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processor := that.GetProcessor()
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k = processor.ProcessColumn(k) + " "
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if v == nil {
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where += k + " IS NULL "
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} else if reflect.ValueOf(v).Type().String() == "common.Slice" || strings.Contains(reflect.ValueOf(v).Type().String(), "[]") {
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vs := ObjToSlice(v)
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if len(vs) == 0 {
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// IN 空数组 -> 生成永假条件
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where += "1=0 "
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return where, res
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}
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if len(vs) == 1 {
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where += k + "=? "
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res = append(res, vs[0])
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return where, res
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}
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// IN 优化
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where, res = that.optimizeInCondition(k, vs, where, res)
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} else {
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where += k + "=? "
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res = append(res, v)
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}
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return where, res
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}
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// optimizeInCondition 优化 IN 条件（连续整数转为 BETWEEN）
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func (that *HoTimeDB) optimizeInCondition(k string, vs Slice, where string, res []interface{}) (string, []interface{}) {
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min := int64(0)
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isMin := true
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IsRange := true
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num := int64(0)
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isNum := true
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where1 := ""
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res1 := Slice{}
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where2 := k + " IN ("
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res2 := Slice{}
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for kvs := 0; kvs <= len(vs); kvs++ {
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vsv := int64(0)
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if kvs < len(vs) {
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vsv = vs.GetCeilInt64(kvs)
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// 确保是全部是int类型
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if ObjToStr(vsv) != vs.GetString(kvs) {
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IsRange = false
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break
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}
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}
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if isNum {
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isNum = false
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num = vsv
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} else {
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num++
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}
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if isMin {
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isMin = false
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min = vsv
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}
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// 不等于则到了分路口
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if num != vsv {
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// between
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if num-min > 1 {
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if where1 != "" {
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where1 += " OR " + k + " BETWEEN ? AND ? "
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} else {
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where1 += k + " BETWEEN ? AND ? "
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}
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res1 = append(res1, min)
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res1 = append(res1, num-1)
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} else {
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where2 += "?,"
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res2 = append(res2, min)
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}
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min = vsv
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num = vsv
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}
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}
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if IsRange {
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where3 := ""
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if where1 != "" {
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where3 += where1
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res = append(res, res1...)
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}
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if len(res2) == 1 {
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if where3 == "" {
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where3 += k + " = ? "
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} else {
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where3 += " OR " + k + " = ? "
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}
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res = append(res, res2...)
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} else if len(res2) > 1 {
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where2 = where2[:len(where2)-1]
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if where3 == "" {
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where3 += where2 + ")"
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} else {
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where3 += " OR " + where2 + ")"
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}
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res = append(res, res2...)
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}
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if where3 != "" {
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where += "(" + where3 + ")"
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}
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return where, res
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}
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// 非连续整数，使用普通 IN
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where += k + " IN ("
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res = append(res, vs...)
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for i := 0; i < len(vs); i++ {
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if i+1 != len(vs) {
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where += "?,"
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} else {
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where += "?) "
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}
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}
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return where, res
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}
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// notIn NOT IN 条件处理
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func (that *HoTimeDB) notIn(k string, v interface{}, where string, res []interface{}) (string, []interface{}) {
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if v == nil {
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where += k + " IS NOT NULL "
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} else if reflect.ValueOf(v).Type().String() == "common.Slice" || strings.Contains(reflect.ValueOf(v).Type().String(), "[]") {
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vs := ObjToSlice(v)
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if len(vs) == 0 {
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return where, res
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}
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where += k + " NOT IN ("
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res = append(res, vs...)
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for i := 0; i < len(vs); i++ {
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if i+1 != len(vs) {
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where += "?,"
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} else {
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where += "?) "
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}
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}
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} else {
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where += k + " !=? "
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res = append(res, v)
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}
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return where, res
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}
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// cond 条件组合处理
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func (that *HoTimeDB) cond(tag string, data Map) (string, []interface{}) {
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where := " "
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res := make([]interface{}, 0)
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lens := len(data)
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||
|
||
testQu := []string{}
|
||
for key := range data {
|
||
testQu = append(testQu, key)
|
||
}
|
||
sort.Strings(testQu)
|
||
|
||
for _, k := range testQu {
|
||
v := data[k]
|
||
x := 0
|
||
for i := 0; i < len(condition); i++ {
|
||
if condition[i] == strings.ToUpper(k) {
|
||
tw, ts := that.cond(strings.ToUpper(k), v.(Map))
|
||
if lens--; lens <= 0 {
|
||
where += "(" + tw + ") "
|
||
} else {
|
||
where += "(" + tw + ") " + tag + " "
|
||
}
|
||
|
||
res = append(res, ts...)
|
||
break
|
||
}
|
||
x++
|
||
}
|
||
|
||
if x == len(condition) {
|
||
tv, vv := that.varCond(k, v)
|
||
if tv == "" {
|
||
lens--
|
||
continue
|
||
}
|
||
res = append(res, vv...)
|
||
if lens--; lens <= 0 {
|
||
where += tv + ""
|
||
} else {
|
||
where += tv + " " + tag + " "
|
||
}
|
||
}
|
||
}
|
||
|
||
return where, res
|
||
}
|