package main
import "fmt"
import "strings"
// import "encoding/json"
import "strconv"
func main() {
types := make(map[string]string)
types["double_value"] = "int"
types["float_value"] = "int"
types["id"] = "string"
list := make([]map[string]interface{},0)
for index := 0; index < 2; index++ {
obj := make(map[string]interface{})
if(index == 0){
obj["double_value"] = strconv.Itoa(index+4)
obj["float_value"] = strconv.Itoa(index+4)
obj["id"] = "1"
}else{
obj["float_value"] = strconv.Itoa(index+4)
obj["id"] = "2"
}
list = append(list,obj)
}
// sql := BatchUpdateType("codec_example","id",types,list)
sql,args := BatchUpdate("codec_example","id",list)
fmt.Println(sql)
fmt.Println("%v",args)
}
func BatchUpdateType(table string, primaryKey string,types map[string]string, list []map[string]string) (string) {
if table == "" || primaryKey == "" || list == nil {
return ""
}
sql := "alter table " + table
con := make(map[int]string, 0)
conSql := make(map[int]string, 0)
fields := make([]string, 0)
for key, value := range list {
x := 0
for k, _ := range value {
if(types[k] == "string"){
list[key][k] = "'"+value[k]+"'"
}
}
for k, _ := range value {
_, ok := con[x]
if k != primaryKey {
if !ok {
if x == 0 {
con[x] = " update " + k + " = " + "multiIf("
} else {
con[x] = k + " = " + "multiIf("
}
conSql[x] = ""
}
temp := value[primaryKey]
conSql[x] = conSql[x] + primaryKey+" == " + temp + " ," + value[k] + ","
x++
}
}
temp := value[primaryKey]
fields = append(fields, temp)
}
conNum := len(con) - 1
for key, value := range con {
if key < conNum {
sql = sql + value + conSql[key] + "NULL),"
} else if key == conNum {
sql = sql + value + conSql[key] + "NULL)"
}
}
sql = sql + " where " + primaryKey + " in(" + strings.Join(fields, ",") + ")"
return sql
}
func BatchUpdate(table string, primaryKey string, list []map[string]interface{}) (string,[]interface{}) {
args := make([]interface{},0)
if table == "" || primaryKey == "" || list == nil {
return "",args
}
sql := "alter table " + table
con := make(map[string]string, 0)
conSql := make(map[string]string, 0)
fields := make([]interface{}, 0)
fieldsTemp := make([]string, 0)
for _, value := range list {
x := 0
for k, _ := range value {
_, ok := con[k]
if k != primaryKey {
if !ok {
if x == 0 {
con[k] = " update " + k + " = " + "multiIf("
} else {
con[k] = k + " = " + "multiIf("
}
conSql[k] = ""
}
temp := value[primaryKey]
args = append(args,temp)
args = append(args,value[k])
conSql[k] = conSql[k] + primaryKey+" == ? ,?,"
x++
}
}
temp := value[primaryKey]
fields = append(fields, temp)
fieldsTemp = append(fieldsTemp, "?")
}
conNum := len(con)
i := 0
for key, value := range con {
i++
if i < conNum {
sql = sql + value + conSql[key] + key+"),"
} else if i == conNum {
sql = sql + value + conSql[key] + key+")"
}
}
for _, value := range fields {
args = append(args,value)
}
sql = sql + " where " + primaryKey + " in(" + strings.Join(fieldsTemp, ",") + ")"
return sql,args
}
alter table codec_example update double_value = multiIf(id == ? ,?,double_value),float_value = multiIf(id == ? ,?,id == ? ,?,float_value) where id in(?,?)
