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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"
default:
return ""
}
}
var (
scanTypeFloat32 = reflect.TypeOf(float32(0))
scanTypeFloat64 = reflect.TypeOf(float64(0))
scanTypeInt8 = reflect.TypeOf(int8(0))
scanTypeInt16 = reflect.TypeOf(int16(0))
scanTypeInt32 = reflect.TypeOf(int32(0))
scanTypeInt64 = reflect.TypeOf(int64(0))
scanTypeNullFloat = reflect.TypeOf(sql.NullFloat64{})
scanTypeNullInt = reflect.TypeOf(sql.NullInt64{})
scanTypeNullTime = reflect.TypeOf(sql.NullTime{})
scanTypeUint8 = reflect.TypeOf(uint8(0))
scanTypeUint16 = reflect.TypeOf(uint16(0))
scanTypeUint32 = reflect.TypeOf(uint32(0))
scanTypeUint64 = reflect.TypeOf(uint64(0))
scanTypeString = reflect.TypeOf("")
scanTypeNullString = reflect.TypeOf(sql.NullString{})
scanTypeBytes = reflect.TypeOf([]byte{})
scanTypeUnknown = reflect.TypeOf(new(any))
)
type mysqlField struct {
tableName string
name string
length uint32
flags fieldFlag
fieldType fieldType
decimals byte
charSet uint8
}
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
}
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:
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
}
}
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