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// Go MySQL Driver - A MySQL-Driver for Go's database/sql package

//

// Copyright 2017 The Go-MySQL-Driver Authors. All rights reserved.

//

// This Source Code Form is subject to the terms of the Mozilla Public

// License, v. 2.0. If a copy of the MPL was not distributed with this file,

// You can obtain one at http://mozilla.org/MPL/2.0/.

package mysql

import (

"database/sql"

"reflect"

)

func (mf *mysqlField) typeDatabaseName() string {

switch mf.fieldType {

case fieldTypeBit:

return "BIT"

case fieldTypeBLOB:

if mf.charSet != binaryCollationID {

return "TEXT"

}

return "BLOB"

case fieldTypeDate:

return "DATE"

case fieldTypeDateTime:

return "DATETIME"

case fieldTypeDecimal:

return "DECIMAL"

case fieldTypeDouble:

return "DOUBLE"

case fieldTypeEnum:

return "ENUM"

case fieldTypeFloat:

return "FLOAT"

case fieldTypeGeometry:

return "GEOMETRY"

case fieldTypeInt24:

if mf.flags&flagUnsigned != 0 {

return "UNSIGNED MEDIUMINT"

}

return "MEDIUMINT"

case fieldTypeJSON:

return "JSON"

case fieldTypeLong:

if mf.flags&flagUnsigned != 0 {

return "UNSIGNED INT"

}

return "INT"

case fieldTypeLongBLOB:

if mf.charSet != binaryCollationID {

return "LONGTEXT"

}

return "LONGBLOB"

case fieldTypeLongLong:

if mf.flags&flagUnsigned != 0 {

return "UNSIGNED BIGINT"

}

return "BIGINT"

case fieldTypeMediumBLOB:

if mf.charSet != binaryCollationID {

return "MEDIUMTEXT"

}

return "MEDIUMBLOB"

case fieldTypeNewDate:

return "DATE"

case fieldTypeNewDecimal:

return "DECIMAL"

case fieldTypeNULL:

return "NULL"

case fieldTypeSet:

return "SET"

case fieldTypeShort:

if mf.flags&flagUnsigned != 0 {

return "UNSIGNED SMALLINT"

}

return "SMALLINT"

case fieldTypeString:

if mf.flags&flagEnum != 0 {

return "ENUM"

} else if mf.flags&flagSet != 0 {

return "SET"

}

if mf.charSet == binaryCollationID {

return "BINARY"

}

return "CHAR"

case fieldTypeTime:

return "TIME"

case fieldTypeTimestamp:

return "TIMESTAMP"

case fieldTypeTiny:

if mf.flags&flagUnsigned != 0 {

return "UNSIGNED TINYINT"

}

return "TINYINT"

case fieldTypeTinyBLOB:

if mf.charSet != binaryCollationID {

return "TINYTEXT"

}

return "TINYBLOB"

case fieldTypeVarChar:

if mf.charSet == binaryCollationID {

return "VARBINARY"

}

return "VARCHAR"

case fieldTypeVarString:

if mf.charSet == binaryCollationID {

return "VARBINARY"

}

return "VARCHAR"

case fieldTypeYear:

return "YEAR"

case fieldTypeVector:

return "VECTOR"

default:

return ""

}

}

var (

scanTypeFloat32 = reflect.TypeFor[float32]()

scanTypeFloat64 = reflect.TypeFor[float64]()

scanTypeInt8 = reflect.TypeFor[int8]()

scanTypeInt16 = reflect.TypeFor[int16]()

scanTypeInt32 = reflect.TypeFor[int32]()

scanTypeInt64 = reflect.TypeFor[int64]()

scanTypeNullFloat = reflect.TypeFor[sql.NullFloat64]()

scanTypeNullInt = reflect.TypeFor[sql.NullInt64]()

scanTypeNullUint = reflect.TypeFor[sql.Null[uint64]]()

scanTypeNullTime = reflect.TypeFor[sql.NullTime]()

scanTypeUint8 = reflect.TypeFor[uint8]()

scanTypeUint16 = reflect.TypeFor[uint16]()

scanTypeUint32 = reflect.TypeFor[uint32]()

scanTypeUint64 = reflect.TypeFor[uint64]()

scanTypeString = reflect.TypeFor[string]()

scanTypeNullString = reflect.TypeFor[sql.NullString]()

scanTypeBytes = reflect.TypeFor[[]byte]()

scanTypeUnknown = reflect.TypeFor[*any]()

)

type mysqlField struct {

tableName string

name string

length uint32

flags fieldFlag

fieldType fieldType

decimals byte

charSet uint16

}

func (mf *mysqlField) scanType() reflect.Type {

switch mf.fieldType {

case fieldTypeTiny:

if mf.flags&flagNotNULL != 0 {

if mf.flags&flagUnsigned != 0 {

return scanTypeUint8

}

return scanTypeInt8

}

return scanTypeNullInt

case fieldTypeShort, fieldTypeYear:

if mf.flags&flagNotNULL != 0 {

if mf.flags&flagUnsigned != 0 {

return scanTypeUint16

}

return scanTypeInt16

}

return scanTypeNullInt

case fieldTypeInt24, fieldTypeLong:

if mf.flags&flagNotNULL != 0 {

if mf.flags&flagUnsigned != 0 {

return scanTypeUint32

}

return scanTypeInt32

}

return scanTypeNullInt

case fieldTypeLongLong:

if mf.flags&flagNotNULL != 0 {

if mf.flags&flagUnsigned != 0 {

return scanTypeUint64

}

return scanTypeInt64

}

if mf.flags&flagUnsigned != 0 {

return scanTypeNullUint

}

return scanTypeNullInt

case fieldTypeFloat:

if mf.flags&flagNotNULL != 0 {

return scanTypeFloat32

}

return scanTypeNullFloat

case fieldTypeDouble:

if mf.flags&flagNotNULL != 0 {

return scanTypeFloat64

}

return scanTypeNullFloat

case fieldTypeBit, fieldTypeTinyBLOB, fieldTypeMediumBLOB, fieldTypeLongBLOB,

fieldTypeBLOB, fieldTypeVarString, fieldTypeString, fieldTypeGeometry, fieldTypeVector:

if mf.charSet == binaryCollationID {

return scanTypeBytes

}

fallthrough

case fieldTypeDecimal, fieldTypeNewDecimal, fieldTypeVarChar,

fieldTypeEnum, fieldTypeSet, fieldTypeJSON, fieldTypeTime:

if mf.flags&flagNotNULL != 0 {

return scanTypeString

}

return scanTypeNullString

case fieldTypeDate, fieldTypeNewDate,

fieldTypeTimestamp, fieldTypeDateTime:

// NullTime is always returned for more consistent behavior as it can

// handle both cases of parseTime regardless if the field is nullable.

return scanTypeNullTime

default:

return scanTypeUnknown

}

}