755 lines
20 KiB
Go
755 lines
20 KiB
Go
// Copyright 2017 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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"database/sql/driver"
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"errors"
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"fmt"
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"reflect"
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"time"
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"xorm.io/builder"
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"xorm.io/xorm/convert"
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"xorm.io/xorm/dialects"
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"xorm.io/xorm/internal/json"
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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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func (statement *Statement) ifAddColUpdate(col *schemas.Column, includeVersion, includeUpdated, includeNil,
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includeAutoIncr, update bool,
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) (bool, error) {
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columnMap := statement.ColumnMap
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omitColumnMap := statement.OmitColumnMap
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unscoped := statement.unscoped
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if !includeVersion && col.IsVersion {
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return false, nil
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}
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if col.IsCreated && !columnMap.Contain(col.Name) {
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return false, nil
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}
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if !includeUpdated && col.IsUpdated {
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return false, nil
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}
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if !includeAutoIncr && col.IsAutoIncrement {
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return false, nil
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}
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if col.IsDeleted && !unscoped {
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return false, nil
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}
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if omitColumnMap.Contain(col.Name) {
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return false, nil
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}
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if len(columnMap) > 0 && !columnMap.Contain(col.Name) {
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return false, nil
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}
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if col.MapType == schemas.ONLYFROMDB {
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return false, nil
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}
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if statement.IncrColumns.IsColExist(col.Name) {
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return false, nil
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} else if statement.DecrColumns.IsColExist(col.Name) {
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return false, nil
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} else if statement.ExprColumns.IsColExist(col.Name) {
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return false, nil
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}
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return true, nil
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}
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// BuildUpdates auto generating update columnes and values according a struct
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func (statement *Statement) BuildUpdates(tableValue reflect.Value,
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includeVersion, includeUpdated, includeNil,
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includeAutoIncr, update bool,
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) ([]string, []interface{}, error) {
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table := statement.RefTable
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allUseBool := statement.allUseBool
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useAllCols := statement.useAllCols
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mustColumnMap := statement.MustColumnMap
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nullableMap := statement.NullableMap
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colNames := make([]string, 0)
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args := make([]interface{}, 0)
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for _, col := range table.Columns() {
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ok, err := statement.ifAddColUpdate(col, includeVersion, includeUpdated, includeNil,
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includeAutoIncr, update)
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if err != nil {
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return nil, nil, err
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}
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if !ok {
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continue
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}
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fieldValuePtr, err := col.ValueOfV(&tableValue)
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if err != nil {
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return nil, nil, err
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}
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if fieldValuePtr == nil {
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continue
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}
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fieldValue := *fieldValuePtr
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fieldType := reflect.TypeOf(fieldValue.Interface())
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if fieldType == nil {
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continue
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}
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requiredField := useAllCols
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includeNil := useAllCols
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if b, ok := getFlagForColumn(mustColumnMap, col); ok {
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if b {
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requiredField = true
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} else {
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continue
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}
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}
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// !evalphobia! set fieldValue as nil when column is nullable and zero-value
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if b, ok := getFlagForColumn(nullableMap, col); ok {
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if b && col.Nullable && utils.IsZero(fieldValue.Interface()) {
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var nilValue *int
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fieldValue = reflect.ValueOf(nilValue)
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fieldType = reflect.TypeOf(fieldValue.Interface())
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includeNil = true
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}
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}
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var val interface{}
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if fieldValue.CanAddr() {
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if structConvert, ok := fieldValue.Addr().Interface().(convert.Conversion); ok {
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data, err := structConvert.ToDB()
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if err != nil {
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return nil, nil, err
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}
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if data != nil {
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val = data
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if !col.SQLType.IsBlob() {
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val = string(data)
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}
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}
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goto APPEND
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}
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}
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if structConvert, ok := fieldValue.Interface().(convert.Conversion); ok && !fieldValue.IsNil() {
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data, err := structConvert.ToDB()
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if err != nil {
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return nil, nil, err
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}
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if data != nil {
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val = data
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if !col.SQLType.IsBlob() {
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val = string(data)
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}
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}
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goto APPEND
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}
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if fieldType.Kind() == reflect.Ptr {
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if fieldValue.IsNil() {
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if includeNil {
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args = append(args, nil)
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colNames = append(colNames, fmt.Sprintf("%v=?", statement.quote(col.Name)))
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}
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continue
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} else if !fieldValue.IsValid() {
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continue
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} else {
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// dereference ptr type to instance type
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fieldValue = fieldValue.Elem()
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fieldType = reflect.TypeOf(fieldValue.Interface())
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requiredField = true
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}
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}
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switch fieldType.Kind() {
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case reflect.Bool:
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if allUseBool || requiredField {
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val = fieldValue.Interface()
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} else {
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// if a bool in a struct, it will not be as a condition because it default is false,
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// please use Where() instead
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continue
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}
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case reflect.String:
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if !requiredField && fieldValue.String() == "" {
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continue
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}
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// for MyString, should convert to string or panic
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if fieldType.String() != reflect.String.String() {
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val = fieldValue.String()
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} else {
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val = fieldValue.Interface()
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}
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case reflect.Int8, reflect.Int16, reflect.Int, reflect.Int32, reflect.Int64:
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if !requiredField && fieldValue.Int() == 0 {
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continue
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}
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val = fieldValue.Interface()
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case reflect.Float32, reflect.Float64:
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if !requiredField && fieldValue.Float() == 0.0 {
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continue
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}
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val = fieldValue.Interface()
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case reflect.Uint8, reflect.Uint16, reflect.Uint, reflect.Uint32, reflect.Uint64:
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if !requiredField && fieldValue.Uint() == 0 {
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continue
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}
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val = fieldValue.Interface()
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case reflect.Struct:
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if fieldType.ConvertibleTo(schemas.TimeType) {
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t := fieldValue.Convert(schemas.TimeType).Interface().(time.Time)
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if !requiredField && (t.IsZero() || !fieldValue.IsValid()) {
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continue
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}
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val, err = dialects.FormatColumnTime(statement.dialect, statement.defaultTimeZone, col, t)
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if err != nil {
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return nil, nil, err
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}
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} else if nulType, ok := fieldValue.Interface().(driver.Valuer); ok {
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val, _ = nulType.Value()
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if val == nil && !requiredField {
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continue
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}
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} else {
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if !col.IsJSON {
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table, err := statement.tagParser.ParseWithCache(fieldValue)
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if err != nil {
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val = fieldValue.Interface()
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} else {
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if len(table.PrimaryKeys) == 1 {
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pkField := reflect.Indirect(fieldValue).FieldByName(table.PKColumns()[0].FieldName)
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// fix non-int pk issues
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if pkField.IsValid() && (!requiredField && !utils.IsZero(pkField.Interface())) {
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val = 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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return nil, nil, errors.New("Not supported multiple primary keys")
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}
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}
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} else {
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// Blank struct could not be as update data
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if requiredField || !utils.IsStructZero(fieldValue) {
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bytes, err := json.DefaultJSONHandler.Marshal(fieldValue.Interface())
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if err != nil {
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return nil, nil, fmt.Errorf("mashal %v failed", fieldValue.Interface())
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}
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if col.SQLType.IsText() {
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val = string(bytes)
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} else if col.SQLType.IsBlob() {
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val = bytes
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}
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} else {
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continue
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}
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}
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}
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case reflect.Array, reflect.Slice, reflect.Map:
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if !requiredField {
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if fieldValue == reflect.Zero(fieldType) {
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continue
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}
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if fieldType.Kind() == reflect.Array {
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if utils.IsArrayZero(fieldValue) {
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continue
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}
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} else if fieldValue.IsNil() || !fieldValue.IsValid() || fieldValue.Len() == 0 {
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continue
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}
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}
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if col.SQLType.IsText() {
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bytes, err := json.DefaultJSONHandler.Marshal(fieldValue.Interface())
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if err != nil {
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return nil, nil, err
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}
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val = string(bytes)
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} else if col.SQLType.IsBlob() {
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var bytes []byte
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var err error
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if fieldType.Kind() == reflect.Slice &&
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fieldType.Elem().Kind() == reflect.Uint8 {
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if fieldValue.Len() > 0 {
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val = fieldValue.Bytes()
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} else {
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continue
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}
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} else if fieldType.Kind() == reflect.Array &&
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fieldType.Elem().Kind() == reflect.Uint8 {
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val = fieldValue.Slice(0, 0).Interface()
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} else {
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bytes, err = json.DefaultJSONHandler.Marshal(fieldValue.Interface())
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if err != nil {
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return nil, nil, err
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}
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val = bytes
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}
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} else {
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continue
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}
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default:
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val = fieldValue.Interface()
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}
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APPEND:
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args = append(args, val)
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colNames = append(colNames, fmt.Sprintf("%v = ?", statement.quote(col.Name)))
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}
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return colNames, args, nil
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}
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func (statement *Statement) writeUpdateTop(updateWriter *builder.BytesWriter) error {
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if statement.dialect.URI().DBType != schemas.MSSQL || statement.LimitN == nil {
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return nil
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}
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table := statement.RefTable
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if statement.HasOrderBy() && table != nil && len(table.PrimaryKeys) == 1 {
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return nil
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}
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_, err := fmt.Fprintf(updateWriter, " TOP (%d)", *statement.LimitN)
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return err
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}
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func (statement *Statement) writeUpdateTableName(updateWriter *builder.BytesWriter) error {
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tableName := statement.quote(statement.TableName())
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if statement.TableAlias == "" {
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_, err := fmt.Fprint(updateWriter, " ", tableName)
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return err
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}
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switch statement.dialect.URI().DBType {
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case schemas.MSSQL:
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_, err := fmt.Fprint(updateWriter, " ", statement.TableAlias)
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return err
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default:
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_, err := fmt.Fprint(updateWriter, " ", tableName, " AS ", statement.TableAlias)
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return err
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}
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}
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func (statement *Statement) writeUpdateFrom(updateWriter *builder.BytesWriter) (builder.Cond, error) {
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if statement.dialect.URI().DBType == schemas.MSSQL {
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if _, err := fmt.Fprint(updateWriter, " FROM"); err != nil {
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return nil, err
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}
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if _, err := fmt.Fprint(updateWriter, " ", statement.quote(statement.TableName())); err != nil {
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return nil, err
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}
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if statement.TableAlias != "" {
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if _, err := fmt.Fprint(updateWriter, " ", statement.TableAlias); err != nil {
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return nil, err
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}
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}
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}
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if len(statement.joins) == 0 {
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return builder.NewCond(), nil
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}
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if statement.dialect.URI().DBType != schemas.MSSQL {
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if _, err := fmt.Fprint(updateWriter, " FROM"); err != nil {
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return nil, err
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}
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}
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cond := builder.NewCond()
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for i, join := range statement.joins {
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if statement.dialect.URI().DBType == schemas.MSSQL || i > 0 {
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if _, err := fmt.Fprint(updateWriter, ","); err != nil {
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return nil, err
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}
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}
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if err := statement.writeJoinTable(updateWriter, join); err != nil {
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return nil, err
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}
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joinCond, err := statement.convertJoinCondition(join)
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if err != nil {
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return nil, err
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}
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cond = cond.And(joinCond)
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}
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return cond, nil
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}
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func (statement *Statement) writeWhereOrAnd(updateWriter *builder.BytesWriter, hasConditions bool) error {
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if hasConditions {
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_, err := fmt.Fprint(updateWriter, " AND ")
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return err
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}
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_, err := fmt.Fprint(updateWriter, " WHERE ")
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return err
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}
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func (statement *Statement) writeUpdateLimit(updateWriter *builder.BytesWriter, cond builder.Cond) error {
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if statement.LimitN == nil {
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return nil
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}
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table := statement.RefTable
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tableName := statement.TableName()
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limitValue := *statement.LimitN
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switch statement.dialect.URI().DBType {
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case schemas.MYSQL:
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_, err := fmt.Fprintf(updateWriter, " LIMIT %d", limitValue)
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return err
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case schemas.SQLITE:
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if err := statement.writeWhereOrAnd(updateWriter, cond.IsValid()); err != nil {
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return err
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}
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if _, err := fmt.Fprint(updateWriter, "rowid IN (SELECT rowid FROM ", statement.quote(tableName)); err != nil {
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return err
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}
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if err := statement.writeWhereCond(updateWriter, cond); err != nil {
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return err
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}
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if err := statement.writeOrderBys(updateWriter); err != nil {
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return err
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}
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_, err := fmt.Fprintf(updateWriter, " LIMIT %d)", limitValue)
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return err
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case schemas.POSTGRES:
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if err := statement.writeWhereOrAnd(updateWriter, cond.IsValid()); err != nil {
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return err
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}
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if _, err := fmt.Fprint(updateWriter, "CTID IN (SELECT CTID FROM ", statement.quote(tableName)); err != nil {
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return err
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}
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if err := statement.writeWhereCond(updateWriter, cond); err != nil {
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return err
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}
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if err := statement.writeOrderBys(updateWriter); err != nil {
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return err
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}
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_, err := fmt.Fprintf(updateWriter, " LIMIT %d)", limitValue)
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return err
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case schemas.MSSQL:
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if statement.HasOrderBy() && table != nil && len(table.PrimaryKeys) == 1 {
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if _, err := fmt.Fprintf(updateWriter, " WHERE %s IN (SELECT TOP (%d) %s FROM %v",
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table.PrimaryKeys[0], limitValue, table.PrimaryKeys[0],
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statement.quote(tableName)); err != nil {
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return err
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}
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if err := statement.writeWhereCond(updateWriter, cond); err != nil {
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return err
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}
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if err := statement.writeOrderBys(updateWriter); err != nil {
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return err
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}
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_, err := fmt.Fprint(updateWriter, ")")
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return err
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}
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return nil
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default: // TODO: Oracle support needed
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return fmt.Errorf("not implemented")
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}
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}
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func (statement *Statement) GenConditionsFromMap(m interface{}) ([]builder.Cond, error) {
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switch t := m.(type) {
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case map[string]interface{}:
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conds := []builder.Cond{}
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for k, v := range t {
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conds = append(conds, builder.Eq{k: v})
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}
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return conds, nil
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case map[string]string:
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conds := []builder.Cond{}
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for k, v := range t {
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conds = append(conds, builder.Eq{k: v})
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}
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return conds, nil
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default:
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return nil, fmt.Errorf("unsupported condition map type %v", t)
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}
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}
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|
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func (statement *Statement) writeVersionIncrSet(w builder.Writer, v reflect.Value, hasPreviousSet bool) error {
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if v.Type().Kind() != reflect.Struct {
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return nil
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}
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table := statement.RefTable
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if !(statement.RefTable != nil && table.Version != "" && statement.CheckVersion) {
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return nil
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}
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verValue, err := table.VersionColumn().ValueOfV(&v)
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if err != nil {
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return err
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}
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if verValue == nil {
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return nil
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}
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|
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if hasPreviousSet {
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if _, err := fmt.Fprint(w, ", "); err != nil {
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return err
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}
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}
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if _, err := fmt.Fprint(w, statement.quote(table.Version), " = ", statement.quote(table.Version), " + 1"); err != nil {
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return err
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}
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return nil
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}
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|
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func (statement *Statement) writeIncrSets(w builder.Writer, hasPreviousSets bool) error {
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for i, expr := range statement.IncrColumns {
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if i > 0 || hasPreviousSets {
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if _, err := fmt.Fprint(w, ", "); err != nil {
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return err
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}
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}
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if _, err := fmt.Fprint(w, statement.quote(expr.ColName), " = ", statement.quote(expr.ColName), " + ?"); err != nil {
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return err
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}
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w.Append(expr.Arg)
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}
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return nil
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}
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|
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func (statement *Statement) writeDecrSets(w builder.Writer, hasPreviousSets bool) error {
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// for update action to like "column = column - ?"
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for i, expr := range statement.DecrColumns {
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if i > 0 || hasPreviousSets {
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if _, err := fmt.Fprint(w, ", "); err != nil {
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return err
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}
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}
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if _, err := fmt.Fprint(w, statement.quote(expr.ColName), " = ", statement.quote(expr.ColName), " - ?"); err != nil {
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return err
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}
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w.Append(expr.Arg)
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}
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return nil
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}
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|
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func (statement *Statement) writeExprSets(w *builder.BytesWriter, hasPreviousSets bool) error {
|
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// for update action to like "column = expression"
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for i, expr := range statement.ExprColumns {
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if i > 0 || hasPreviousSets {
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if _, err := fmt.Fprint(w, ", "); err != nil {
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return err
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}
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}
|
|
switch tp := expr.Arg.(type) {
|
|
case string:
|
|
if len(tp) == 0 {
|
|
tp = "''"
|
|
}
|
|
if _, err := fmt.Fprint(w, statement.quote(expr.ColName), " = ", tp); err != nil {
|
|
return err
|
|
}
|
|
case *builder.Builder:
|
|
if _, err := fmt.Fprint(w, statement.quote(expr.ColName), " = ("); err != nil {
|
|
return err
|
|
}
|
|
if err := tp.WriteTo(statement.QuoteReplacer(w)); err != nil {
|
|
return err
|
|
}
|
|
if _, err := fmt.Fprint(w, ")"); err != nil {
|
|
return err
|
|
}
|
|
default:
|
|
if _, err := fmt.Fprint(w, statement.quote(expr.ColName), " = ?"); err != nil {
|
|
return err
|
|
}
|
|
w.Append(expr.Arg)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (statement *Statement) writeSetColumns(colNames []string, args []interface{}) func(w *builder.BytesWriter) error {
|
|
return func(w *builder.BytesWriter) error {
|
|
if len(colNames) == 0 {
|
|
return nil
|
|
}
|
|
if len(colNames) != len(args) {
|
|
return fmt.Errorf("columns elements %d but args elements %d", len(colNames), len(args))
|
|
}
|
|
for i, colName := range colNames {
|
|
if i > 0 {
|
|
if _, err := fmt.Fprint(w, ", "); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if statement.dialect.URI().DBType != schemas.SQLITE && statement.dialect.URI().DBType != schemas.POSTGRES && len(statement.joins) > 0 {
|
|
tbName := statement.TableAlias
|
|
if tbName == "" {
|
|
tbName = statement.TableName()
|
|
}
|
|
if _, err := fmt.Fprint(w, tbName, ".", colName); err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
if _, err := fmt.Fprint(w, colName); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
w.Append(args...)
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func (statement *Statement) writeUpdateSets(w *builder.BytesWriter, v reflect.Value, colNames []string, args []interface{}) error {
|
|
// write set
|
|
if _, err := fmt.Fprint(w, " SET "); err != nil {
|
|
return err
|
|
}
|
|
previousLen := w.Len()
|
|
|
|
if err := statement.writeSetColumns(colNames, args)(w); err != nil {
|
|
return err
|
|
}
|
|
|
|
setNumber := len(colNames)
|
|
if err := statement.writeIncrSets(w, setNumber > 0); err != nil {
|
|
return err
|
|
}
|
|
|
|
setNumber += len(statement.IncrColumns)
|
|
if err := statement.writeDecrSets(w, setNumber > 0); err != nil {
|
|
return err
|
|
}
|
|
|
|
setNumber += len(statement.DecrColumns)
|
|
if err := statement.writeExprSets(w, setNumber > 0); err != nil {
|
|
return err
|
|
}
|
|
|
|
setNumber += len(statement.ExprColumns)
|
|
if err := statement.writeVersionIncrSet(w, v, setNumber > 0); err != nil {
|
|
return err
|
|
}
|
|
|
|
// if no columns to be updated, return error
|
|
if previousLen == w.Len() {
|
|
return ErrNoColumnsTobeUpdated
|
|
}
|
|
return nil
|
|
}
|
|
|
|
var ErrNoColumnsTobeUpdated = errors.New("no columns found to be updated")
|
|
|
|
func (statement *Statement) WriteUpdate(updateWriter *builder.BytesWriter, cond builder.Cond, v reflect.Value, colNames []string, args []interface{}) error {
|
|
switch statement.dialect.URI().DBType {
|
|
case schemas.MYSQL:
|
|
return statement.writeUpdateMySQL(updateWriter, cond, v, colNames, args)
|
|
case schemas.MSSQL:
|
|
return statement.writeUpdateMSSQL(updateWriter, cond, v, colNames, args)
|
|
default:
|
|
return statement.writeUpdateCommon(updateWriter, cond, v, colNames, args)
|
|
}
|
|
}
|
|
|
|
func (statement *Statement) writeUpdateMySQL(updateWriter *builder.BytesWriter, cond builder.Cond, v reflect.Value, colNames []string, args []interface{}) error {
|
|
if _, err := fmt.Fprintf(updateWriter, "UPDATE"); err != nil {
|
|
return err
|
|
}
|
|
if err := statement.writeUpdateTableName(updateWriter); err != nil {
|
|
return err
|
|
}
|
|
if err := statement.writeJoins(updateWriter); err != nil {
|
|
return err
|
|
}
|
|
if err := statement.writeUpdateSets(updateWriter, v, colNames, args); err != nil {
|
|
return err
|
|
}
|
|
// write where
|
|
if err := statement.writeWhereCond(updateWriter, cond); err != nil {
|
|
return err
|
|
}
|
|
if err := statement.writeOrderBys(updateWriter); err != nil {
|
|
return err
|
|
}
|
|
return statement.writeUpdateLimit(updateWriter, cond)
|
|
}
|
|
|
|
func (statement *Statement) writeUpdateMSSQL(updateWriter *builder.BytesWriter, cond builder.Cond, v reflect.Value, colNames []string, args []interface{}) error {
|
|
if _, err := fmt.Fprintf(updateWriter, "UPDATE"); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := statement.writeUpdateTop(updateWriter); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := statement.writeUpdateTableName(updateWriter); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := statement.writeUpdateSets(updateWriter, v, colNames, args); err != nil {
|
|
return err
|
|
}
|
|
|
|
// write from
|
|
joinConds, err := statement.writeUpdateFrom(updateWriter)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
table := statement.RefTable
|
|
if statement.HasOrderBy() && table != nil && len(table.PrimaryKeys) == 1 {
|
|
} else {
|
|
// write where
|
|
if err := statement.writeWhereCond(updateWriter, cond.And(joinConds)); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return statement.writeUpdateLimit(updateWriter, cond.And(joinConds))
|
|
}
|
|
|
|
// writeUpdateCommon write update sql for non mysql && non mssql
|
|
func (statement *Statement) writeUpdateCommon(updateWriter *builder.BytesWriter, cond builder.Cond, v reflect.Value, colNames []string, args []interface{}) error {
|
|
if _, err := fmt.Fprintf(updateWriter, "UPDATE"); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := statement.writeUpdateTop(updateWriter); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := statement.writeUpdateTableName(updateWriter); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err := statement.writeUpdateSets(updateWriter, v, colNames, args); err != nil {
|
|
return err
|
|
}
|
|
|
|
// write from
|
|
joinConds, err := statement.writeUpdateFrom(updateWriter)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// write where
|
|
if err := statement.writeWhereCond(updateWriter, cond.And(joinConds)); err != nil {
|
|
return err
|
|
}
|
|
|
|
return statement.writeUpdateLimit(updateWriter, cond.And(joinConds))
|
|
}
|