317 lines
8.9 KiB
Go
317 lines
8.9 KiB
Go
package xorm
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import (
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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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)
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type Statement struct {
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RefTable *Table
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Engine *Engine
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Start int
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LimitN int
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WhereStr string
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Params []interface{}
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OrderStr string
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JoinStr string
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GroupByStr string
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HavingStr string
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ColumnStr string
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columnMap map[string]bool
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ConditionStr string
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AltTableName string
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RawSQL string
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RawParams []interface{}
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UseCascade bool
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UseAutoJoin bool
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StoreEngine string
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Charset string
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BeanArgs []interface{}
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}
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func MakeArray(elem string, count int) []string {
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res := make([]string, count)
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for i := 0; i < count; i++ {
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res[i] = elem
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}
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return res
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}
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func (statement *Statement) Init() {
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statement.RefTable = nil
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statement.Start = 0
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statement.LimitN = 0
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statement.WhereStr = ""
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statement.Params = make([]interface{}, 0)
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statement.OrderStr = ""
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statement.UseCascade = true
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statement.JoinStr = ""
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statement.GroupByStr = ""
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statement.HavingStr = ""
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statement.ColumnStr = ""
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statement.columnMap = make(map[string]bool)
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statement.ConditionStr = ""
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statement.AltTableName = ""
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statement.RawSQL = ""
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statement.RawParams = make([]interface{}, 0)
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statement.BeanArgs = make([]interface{}, 0)
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}
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func (statement *Statement) Sql(querystring string, args ...interface{}) {
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statement.RawSQL = querystring
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statement.RawParams = args
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}
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func (statement *Statement) Where(querystring string, args ...interface{}) {
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statement.WhereStr = querystring
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statement.Params = args
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}
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func (statement *Statement) Table(tableNameOrBean interface{}) {
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t := Type(tableNameOrBean)
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if t.Kind() == reflect.String {
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statement.AltTableName = tableNameOrBean.(string)
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} else if t.Kind() == reflect.Struct {
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statement.RefTable = statement.Engine.AutoMapType(t)
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}
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}
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func BuildConditions(engine *Engine, table *Table, bean interface{}) ([]string, []interface{}) {
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colNames := make([]string, 0)
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var args = make([]interface{}, 0)
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for _, col := range table.Columns {
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fieldValue := col.ValueOf(bean)
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fieldType := reflect.TypeOf(fieldValue.Interface())
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val := fieldValue.Interface()
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switch fieldType.Kind() {
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case reflect.String:
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if fieldValue.String() == "" {
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continue
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}
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case reflect.Int8, reflect.Int16, reflect.Int, reflect.Int32, reflect.Int64:
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if fieldValue.Int() == 0 {
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continue
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}
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case reflect.Float32, reflect.Float64:
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if fieldValue.Float() == 0.0 {
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continue
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}
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case reflect.Uint8, reflect.Uint16, reflect.Uint, reflect.Uint32, reflect.Uint64:
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if fieldValue.Uint() == 0 {
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continue
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}
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case reflect.Struct:
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if fieldType == reflect.TypeOf(time.Now()) {
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t := fieldValue.Interface().(time.Time)
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if t.IsZero() {
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continue
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}
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} else {
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engine.AutoMapType(fieldValue.Type())
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}
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default:
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continue
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}
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if table, ok := engine.Tables[fieldValue.Type()]; ok {
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pkField := reflect.Indirect(fieldValue).FieldByName(table.PKColumn().FieldName)
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if pkField.Int() != 0 {
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args = append(args, pkField.Interface())
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} else {
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continue
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}
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} else {
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args = append(args, val)
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}
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colNames = append(colNames, fmt.Sprintf("%v = ?", engine.Quote(col.Name)))
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}
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return colNames, args
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}
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func (statement *Statement) TableName() string {
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if statement.AltTableName != "" {
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return statement.AltTableName
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}
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if statement.RefTable != nil {
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return statement.RefTable.Name
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}
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return ""
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}
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func (statement *Statement) Id(id int64) {
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if statement.WhereStr == "" {
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statement.WhereStr = "(id)=?"
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statement.Params = []interface{}{id}
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} else {
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statement.WhereStr = statement.WhereStr + " and (id)=?"
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statement.Params = append(statement.Params, id)
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}
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}
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func (statement *Statement) In(column string, args ...interface{}) {
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inStr := fmt.Sprintf("%v IN (%v)", column, strings.Join(MakeArray("?", len(args)), ","))
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if statement.WhereStr == "" {
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statement.WhereStr = inStr
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statement.Params = args
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} else {
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statement.WhereStr = statement.WhereStr + " and " + inStr
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statement.Params = append(statement.Params, args...)
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}
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}
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func (statement *Statement) Cols(columns ...string) {
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statement.ColumnStr = strings.Join(columns, statement.Engine.Quote(", "))
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for _, column := range columns {
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statement.columnMap[column] = true
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}
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}
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func (statement *Statement) Limit(limit int, start ...int) {
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statement.LimitN = limit
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if len(start) > 0 {
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statement.Start = start[0]
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}
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}
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func (statement *Statement) OrderBy(order string) {
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statement.OrderStr = order
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}
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//The join_operator should be one of INNER, LEFT OUTER, CROSS etc - this will be prepended to JOIN
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func (statement *Statement) Join(join_operator, tablename, condition string) {
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if statement.JoinStr != "" {
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statement.JoinStr = statement.JoinStr + fmt.Sprintf("%v JOIN %v ON %v", join_operator, tablename, condition)
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} else {
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statement.JoinStr = fmt.Sprintf("%v JOIN %v ON %v", join_operator, tablename, condition)
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}
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}
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func (statement *Statement) GroupBy(keys string) {
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statement.GroupByStr = keys
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}
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func (statement *Statement) Having(conditions string) {
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statement.HavingStr = fmt.Sprintf("HAVING %v", conditions)
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}
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func (statement *Statement) genColumnStr() string {
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table := statement.RefTable
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colNames := make([]string, 0)
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for _, col := range table.Columns {
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if col.MapType != ONLYTODB {
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colNames = append(colNames, statement.Engine.Quote(statement.TableName())+"."+statement.Engine.Quote(col.Name))
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}
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}
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return strings.Join(colNames, ", ")
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}
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func (statement *Statement) genCreateSQL() string {
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sql := "CREATE TABLE IF NOT EXISTS " + statement.Engine.Quote(statement.TableName()) + " ("
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for _, colName := range statement.RefTable.ColumnsSeq {
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col := statement.RefTable.Columns[colName]
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sql += col.String(statement.Engine)
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sql = strings.TrimSpace(sql)
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sql += ", "
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}
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sql = sql[:len(sql)-2] + ")"
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if statement.Engine.Dialect.SupportEngine() && statement.StoreEngine != "" {
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sql += " ENGINE=" + statement.StoreEngine
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}
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if statement.Engine.Dialect.SupportCharset() && statement.Charset != "" {
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sql += " DEFAULT CHARSET " + statement.Charset
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}
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sql += ";"
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return sql
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}
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func (statement *Statement) genIndexSQL() []string {
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var sqls []string = make([]string, 0)
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for indexName, cols := range statement.RefTable.Indexes {
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sql := fmt.Sprintf("CREATE INDEX IDX_%v_%v ON %v (%v);", statement.TableName(), indexName,
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statement.TableName(), strings.Join(cols, ","))
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sqls = append(sqls, sql)
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}
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return sqls
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}
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func (statement *Statement) genUniqueSQL() []string {
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var sqls []string = make([]string, 0)
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for indexName, cols := range statement.RefTable.Uniques {
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sql := fmt.Sprintf("CREATE UNIQUE INDEX UQE_%v_%v ON %v (%v);", statement.TableName(), indexName,
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statement.TableName(), strings.Join(cols, ","))
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sqls = append(sqls, sql)
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}
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return sqls
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}
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func (statement *Statement) genDropSQL() string {
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sql := "DROP TABLE IF EXISTS " + statement.Engine.Quote(statement.TableName()) + ";"
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return sql
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}
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func (statement Statement) genGetSql(bean interface{}) (string, []interface{}) {
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table := statement.Engine.AutoMap(bean)
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statement.RefTable = table
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colNames, args := BuildConditions(statement.Engine, table, bean)
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statement.ConditionStr = strings.Join(colNames, " and ")
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statement.BeanArgs = args
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var columnStr string = statement.ColumnStr
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if columnStr == "" {
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columnStr = statement.genColumnStr()
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}
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return statement.genSelectSql(columnStr), append(statement.Params, statement.BeanArgs...)
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}
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func (statement Statement) genCountSql(bean interface{}) (string, []interface{}) {
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table := statement.Engine.AutoMap(bean)
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statement.RefTable = table
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colNames, args := BuildConditions(statement.Engine, table, bean)
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statement.ConditionStr = strings.Join(colNames, " and ")
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statement.BeanArgs = args
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return statement.genSelectSql(fmt.Sprintf("count(*) as %v", statement.Engine.Quote("total"))), append(statement.Params, statement.BeanArgs...)
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}
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func (statement Statement) genSelectSql(columnStr string) (a string) {
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if statement.GroupByStr != "" {
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columnStr = statement.Engine.Quote(strings.Replace(statement.GroupByStr, ",", statement.Engine.Quote(","), -1))
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statement.GroupByStr = columnStr
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}
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a = fmt.Sprintf("SELECT %v FROM %v", columnStr,
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statement.Engine.Quote(statement.TableName()))
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if statement.JoinStr != "" {
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a = fmt.Sprintf("%v %v", a, statement.JoinStr)
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}
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if statement.WhereStr != "" {
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a = fmt.Sprintf("%v WHERE %v", a, statement.WhereStr)
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if statement.ConditionStr != "" {
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a = fmt.Sprintf("%v and %v", a, statement.ConditionStr)
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}
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} else if statement.ConditionStr != "" {
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a = fmt.Sprintf("%v WHERE %v", a, statement.ConditionStr)
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}
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if statement.GroupByStr != "" {
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a = fmt.Sprintf("%v GROUP BY %v", a, statement.GroupByStr)
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}
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if statement.HavingStr != "" {
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a = fmt.Sprintf("%v %v", a, statement.HavingStr)
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}
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if statement.OrderStr != "" {
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a = fmt.Sprintf("%v ORDER BY %v", a, statement.OrderStr)
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}
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if statement.Start > 0 {
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a = fmt.Sprintf("%v LIMIT %v OFFSET %v", a, statement.LimitN, statement.Start)
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} else if statement.LimitN > 0 {
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a = fmt.Sprintf("%v LIMIT %v", a, statement.LimitN)
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}
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return
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}
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