/
pgtype.go
2024 lines (1664 loc) · 67 KB
/
pgtype.go
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package pgtype
import (
"database/sql"
"database/sql/driver"
"errors"
"fmt"
"net"
"net/netip"
"reflect"
"time"
)
// PostgreSQL oids for common types
const (
BoolOID = 16
ByteaOID = 17
QCharOID = 18
NameOID = 19
Int8OID = 20
Int2OID = 21
Int4OID = 23
TextOID = 25
OIDOID = 26
TIDOID = 27
XIDOID = 28
CIDOID = 29
JSONOID = 114
JSONArrayOID = 199
PointOID = 600
LsegOID = 601
PathOID = 602
BoxOID = 603
PolygonOID = 604
LineOID = 628
LineArrayOID = 629
CIDROID = 650
CIDRArrayOID = 651
Float4OID = 700
Float8OID = 701
CircleOID = 718
CircleArrayOID = 719
UnknownOID = 705
MacaddrOID = 829
InetOID = 869
BoolArrayOID = 1000
QCharArrayOID = 1003
NameArrayOID = 1003
Int2ArrayOID = 1005
Int4ArrayOID = 1007
TextArrayOID = 1009
TIDArrayOID = 1010
ByteaArrayOID = 1001
XIDArrayOID = 1011
CIDArrayOID = 1012
BPCharArrayOID = 1014
VarcharArrayOID = 1015
Int8ArrayOID = 1016
PointArrayOID = 1017
LsegArrayOID = 1018
PathArrayOID = 1019
BoxArrayOID = 1020
Float4ArrayOID = 1021
Float8ArrayOID = 1022
PolygonArrayOID = 1027
OIDArrayOID = 1028
ACLItemOID = 1033
ACLItemArrayOID = 1034
MacaddrArrayOID = 1040
InetArrayOID = 1041
BPCharOID = 1042
VarcharOID = 1043
DateOID = 1082
TimeOID = 1083
TimestampOID = 1114
TimestampArrayOID = 1115
DateArrayOID = 1182
TimeArrayOID = 1183
TimestamptzOID = 1184
TimestamptzArrayOID = 1185
IntervalOID = 1186
IntervalArrayOID = 1187
NumericArrayOID = 1231
BitOID = 1560
BitArrayOID = 1561
VarbitOID = 1562
VarbitArrayOID = 1563
NumericOID = 1700
RecordOID = 2249
RecordArrayOID = 2287
UUIDOID = 2950
UUIDArrayOID = 2951
JSONBOID = 3802
JSONBArrayOID = 3807
DaterangeOID = 3912
DaterangeArrayOID = 3913
Int4rangeOID = 3904
Int4rangeArrayOID = 3905
NumrangeOID = 3906
NumrangeArrayOID = 3907
TsrangeOID = 3908
TsrangeArrayOID = 3909
TstzrangeOID = 3910
TstzrangeArrayOID = 3911
Int8rangeOID = 3926
Int8rangeArrayOID = 3927
Int4multirangeOID = 4451
NummultirangeOID = 4532
TsmultirangeOID = 4533
TstzmultirangeOID = 4534
DatemultirangeOID = 4535
Int8multirangeOID = 4536
Int4multirangeArrayOID = 6150
NummultirangeArrayOID = 6151
TsmultirangeArrayOID = 6152
TstzmultirangeArrayOID = 6153
DatemultirangeArrayOID = 6155
Int8multirangeArrayOID = 6157
)
type InfinityModifier int8
const (
Infinity InfinityModifier = 1
Finite InfinityModifier = 0
NegativeInfinity InfinityModifier = -Infinity
)
func (im InfinityModifier) String() string {
switch im {
case Finite:
return "finite"
case Infinity:
return "infinity"
case NegativeInfinity:
return "-infinity"
default:
return "invalid"
}
}
// PostgreSQL format codes
const (
TextFormatCode = 0
BinaryFormatCode = 1
)
// A Codec converts between Go and PostgreSQL values.
type Codec interface {
// FormatSupported returns true if the format is supported.
FormatSupported(int16) bool
// PreferredFormat returns the preferred format.
PreferredFormat() int16
// PlanEncode returns an EncodePlan for encoding value into PostgreSQL format for oid and format. If no plan can be
// found then nil is returned.
PlanEncode(m *Map, oid uint32, format int16, value any) EncodePlan
// PlanScan returns a ScanPlan for scanning a PostgreSQL value into a destination with the same type as target. If
// no plan can be found then nil is returned.
PlanScan(m *Map, oid uint32, format int16, target any) ScanPlan
// DecodeDatabaseSQLValue returns src decoded into a value compatible with the sql.Scanner interface.
DecodeDatabaseSQLValue(m *Map, oid uint32, format int16, src []byte) (driver.Value, error)
// DecodeValue returns src decoded into its default format.
DecodeValue(m *Map, oid uint32, format int16, src []byte) (any, error)
}
type nullAssignmentError struct {
dst any
}
func (e *nullAssignmentError) Error() string {
return fmt.Sprintf("cannot assign NULL to %T", e.dst)
}
type Type struct {
Codec Codec
Name string
OID uint32
}
// Map is the mapping between PostgreSQL server types and Go type handling logic. It can encode values for
// transmission to a PostgreSQL server and scan received values.
type Map struct {
oidToType map[uint32]*Type
nameToType map[string]*Type
reflectTypeToName map[reflect.Type]string
oidToFormatCode map[uint32]int16
reflectTypeToType map[reflect.Type]*Type
memoizedScanPlans map[uint32]map[reflect.Type][2]ScanPlan
// TryWrapEncodePlanFuncs is a slice of functions that will wrap a value that cannot be encoded by the Codec. Every
// time a wrapper is found the PlanEncode method will be recursively called with the new value. This allows several layers of wrappers
// to be built up. There are default functions placed in this slice by NewMap(). In most cases these functions
// should run last. i.e. Additional functions should typically be prepended not appended.
TryWrapEncodePlanFuncs []TryWrapEncodePlanFunc
// TryWrapScanPlanFuncs is a slice of functions that will wrap a target that cannot be scanned into by the Codec. Every
// time a wrapper is found the PlanScan method will be recursively called with the new target. This allows several layers of wrappers
// to be built up. There are default functions placed in this slice by NewMap(). In most cases these functions
// should run last. i.e. Additional functions should typically be prepended not appended.
TryWrapScanPlanFuncs []TryWrapScanPlanFunc
}
func NewMap() *Map {
m := &Map{
oidToType: make(map[uint32]*Type),
nameToType: make(map[string]*Type),
reflectTypeToName: make(map[reflect.Type]string),
oidToFormatCode: make(map[uint32]int16),
memoizedScanPlans: make(map[uint32]map[reflect.Type][2]ScanPlan),
TryWrapEncodePlanFuncs: []TryWrapEncodePlanFunc{
TryWrapDerefPointerEncodePlan,
TryWrapBuiltinTypeEncodePlan,
TryWrapFindUnderlyingTypeEncodePlan,
TryWrapStructEncodePlan,
TryWrapSliceEncodePlan,
TryWrapMultiDimSliceEncodePlan,
},
TryWrapScanPlanFuncs: []TryWrapScanPlanFunc{
TryPointerPointerScanPlan,
TryWrapBuiltinTypeScanPlan,
TryFindUnderlyingTypeScanPlan,
TryWrapStructScanPlan,
TryWrapPtrSliceScanPlan,
TryWrapPtrMultiDimSliceScanPlan,
},
}
// Base types
m.RegisterType(&Type{Name: "aclitem", OID: ACLItemOID, Codec: &TextFormatOnlyCodec{TextCodec{}}})
m.RegisterType(&Type{Name: "bit", OID: BitOID, Codec: BitsCodec{}})
m.RegisterType(&Type{Name: "bool", OID: BoolOID, Codec: BoolCodec{}})
m.RegisterType(&Type{Name: "box", OID: BoxOID, Codec: BoxCodec{}})
m.RegisterType(&Type{Name: "bpchar", OID: BPCharOID, Codec: TextCodec{}})
m.RegisterType(&Type{Name: "bytea", OID: ByteaOID, Codec: ByteaCodec{}})
m.RegisterType(&Type{Name: "char", OID: QCharOID, Codec: QCharCodec{}})
m.RegisterType(&Type{Name: "cid", OID: CIDOID, Codec: Uint32Codec{}})
m.RegisterType(&Type{Name: "cidr", OID: CIDROID, Codec: InetCodec{}})
m.RegisterType(&Type{Name: "circle", OID: CircleOID, Codec: CircleCodec{}})
m.RegisterType(&Type{Name: "date", OID: DateOID, Codec: DateCodec{}})
m.RegisterType(&Type{Name: "float4", OID: Float4OID, Codec: Float4Codec{}})
m.RegisterType(&Type{Name: "float8", OID: Float8OID, Codec: Float8Codec{}})
m.RegisterType(&Type{Name: "inet", OID: InetOID, Codec: InetCodec{}})
m.RegisterType(&Type{Name: "int2", OID: Int2OID, Codec: Int2Codec{}})
m.RegisterType(&Type{Name: "int4", OID: Int4OID, Codec: Int4Codec{}})
m.RegisterType(&Type{Name: "int8", OID: Int8OID, Codec: Int8Codec{}})
m.RegisterType(&Type{Name: "interval", OID: IntervalOID, Codec: IntervalCodec{}})
m.RegisterType(&Type{Name: "json", OID: JSONOID, Codec: JSONCodec{}})
m.RegisterType(&Type{Name: "jsonb", OID: JSONBOID, Codec: JSONBCodec{}})
m.RegisterType(&Type{Name: "line", OID: LineOID, Codec: LineCodec{}})
m.RegisterType(&Type{Name: "lseg", OID: LsegOID, Codec: LsegCodec{}})
m.RegisterType(&Type{Name: "macaddr", OID: MacaddrOID, Codec: MacaddrCodec{}})
m.RegisterType(&Type{Name: "name", OID: NameOID, Codec: TextCodec{}})
m.RegisterType(&Type{Name: "numeric", OID: NumericOID, Codec: NumericCodec{}})
m.RegisterType(&Type{Name: "oid", OID: OIDOID, Codec: Uint32Codec{}})
m.RegisterType(&Type{Name: "path", OID: PathOID, Codec: PathCodec{}})
m.RegisterType(&Type{Name: "point", OID: PointOID, Codec: PointCodec{}})
m.RegisterType(&Type{Name: "polygon", OID: PolygonOID, Codec: PolygonCodec{}})
m.RegisterType(&Type{Name: "record", OID: RecordOID, Codec: RecordCodec{}})
m.RegisterType(&Type{Name: "text", OID: TextOID, Codec: TextCodec{}})
m.RegisterType(&Type{Name: "tid", OID: TIDOID, Codec: TIDCodec{}})
m.RegisterType(&Type{Name: "time", OID: TimeOID, Codec: TimeCodec{}})
m.RegisterType(&Type{Name: "timestamp", OID: TimestampOID, Codec: TimestampCodec{}})
m.RegisterType(&Type{Name: "timestamptz", OID: TimestamptzOID, Codec: TimestamptzCodec{}})
m.RegisterType(&Type{Name: "unknown", OID: UnknownOID, Codec: TextCodec{}})
m.RegisterType(&Type{Name: "uuid", OID: UUIDOID, Codec: UUIDCodec{}})
m.RegisterType(&Type{Name: "varbit", OID: VarbitOID, Codec: BitsCodec{}})
m.RegisterType(&Type{Name: "varchar", OID: VarcharOID, Codec: TextCodec{}})
m.RegisterType(&Type{Name: "xid", OID: XIDOID, Codec: Uint32Codec{}})
// Range types
m.RegisterType(&Type{Name: "daterange", OID: DaterangeOID, Codec: &RangeCodec{ElementType: m.oidToType[DateOID]}})
m.RegisterType(&Type{Name: "int4range", OID: Int4rangeOID, Codec: &RangeCodec{ElementType: m.oidToType[Int4OID]}})
m.RegisterType(&Type{Name: "int8range", OID: Int8rangeOID, Codec: &RangeCodec{ElementType: m.oidToType[Int8OID]}})
m.RegisterType(&Type{Name: "numrange", OID: NumrangeOID, Codec: &RangeCodec{ElementType: m.oidToType[NumericOID]}})
m.RegisterType(&Type{Name: "tsrange", OID: TsrangeOID, Codec: &RangeCodec{ElementType: m.oidToType[TimestampOID]}})
m.RegisterType(&Type{Name: "tstzrange", OID: TstzrangeOID, Codec: &RangeCodec{ElementType: m.oidToType[TimestamptzOID]}})
// Multirange types
m.RegisterType(&Type{Name: "datemultirange", OID: DatemultirangeOID, Codec: &MultirangeCodec{ElementType: m.oidToType[DaterangeOID]}})
m.RegisterType(&Type{Name: "int4multirange", OID: Int4multirangeOID, Codec: &MultirangeCodec{ElementType: m.oidToType[Int4rangeOID]}})
m.RegisterType(&Type{Name: "int8multirange", OID: Int8multirangeOID, Codec: &MultirangeCodec{ElementType: m.oidToType[Int8rangeOID]}})
m.RegisterType(&Type{Name: "nummultirange", OID: NummultirangeOID, Codec: &MultirangeCodec{ElementType: m.oidToType[NumrangeOID]}})
m.RegisterType(&Type{Name: "tsmultirange", OID: TsmultirangeOID, Codec: &MultirangeCodec{ElementType: m.oidToType[TsrangeOID]}})
m.RegisterType(&Type{Name: "tstzmultirange", OID: TstzmultirangeOID, Codec: &MultirangeCodec{ElementType: m.oidToType[TstzrangeOID]}})
// Array types
m.RegisterType(&Type{Name: "_aclitem", OID: ACLItemArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[ACLItemOID]}})
m.RegisterType(&Type{Name: "_bit", OID: BitArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[BitOID]}})
m.RegisterType(&Type{Name: "_bool", OID: BoolArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[BoolOID]}})
m.RegisterType(&Type{Name: "_box", OID: BoxArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[BoxOID]}})
m.RegisterType(&Type{Name: "_bpchar", OID: BPCharArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[BPCharOID]}})
m.RegisterType(&Type{Name: "_bytea", OID: ByteaArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[ByteaOID]}})
m.RegisterType(&Type{Name: "_char", OID: QCharArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[QCharOID]}})
m.RegisterType(&Type{Name: "_cid", OID: CIDArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[CIDOID]}})
m.RegisterType(&Type{Name: "_cidr", OID: CIDRArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[CIDROID]}})
m.RegisterType(&Type{Name: "_circle", OID: CircleArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[CircleOID]}})
m.RegisterType(&Type{Name: "_date", OID: DateArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[DateOID]}})
m.RegisterType(&Type{Name: "_daterange", OID: DaterangeArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[DaterangeOID]}})
m.RegisterType(&Type{Name: "_float4", OID: Float4ArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[Float4OID]}})
m.RegisterType(&Type{Name: "_float8", OID: Float8ArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[Float8OID]}})
m.RegisterType(&Type{Name: "_inet", OID: InetArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[InetOID]}})
m.RegisterType(&Type{Name: "_int2", OID: Int2ArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[Int2OID]}})
m.RegisterType(&Type{Name: "_int4", OID: Int4ArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[Int4OID]}})
m.RegisterType(&Type{Name: "_int4range", OID: Int4rangeArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[Int4rangeOID]}})
m.RegisterType(&Type{Name: "_int8", OID: Int8ArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[Int8OID]}})
m.RegisterType(&Type{Name: "_int8range", OID: Int8rangeArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[Int8rangeOID]}})
m.RegisterType(&Type{Name: "_interval", OID: IntervalArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[IntervalOID]}})
m.RegisterType(&Type{Name: "_json", OID: JSONArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[JSONOID]}})
m.RegisterType(&Type{Name: "_jsonb", OID: JSONBArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[JSONBOID]}})
m.RegisterType(&Type{Name: "_line", OID: LineArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[LineOID]}})
m.RegisterType(&Type{Name: "_lseg", OID: LsegArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[LsegOID]}})
m.RegisterType(&Type{Name: "_macaddr", OID: MacaddrArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[MacaddrOID]}})
m.RegisterType(&Type{Name: "_name", OID: NameArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[NameOID]}})
m.RegisterType(&Type{Name: "_numeric", OID: NumericArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[NumericOID]}})
m.RegisterType(&Type{Name: "_numrange", OID: NumrangeArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[NumrangeOID]}})
m.RegisterType(&Type{Name: "_oid", OID: OIDArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[OIDOID]}})
m.RegisterType(&Type{Name: "_path", OID: PathArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[PathOID]}})
m.RegisterType(&Type{Name: "_point", OID: PointArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[PointOID]}})
m.RegisterType(&Type{Name: "_polygon", OID: PolygonArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[PolygonOID]}})
m.RegisterType(&Type{Name: "_record", OID: RecordArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[RecordOID]}})
m.RegisterType(&Type{Name: "_text", OID: TextArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[TextOID]}})
m.RegisterType(&Type{Name: "_tid", OID: TIDArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[TIDOID]}})
m.RegisterType(&Type{Name: "_time", OID: TimeArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[TimeOID]}})
m.RegisterType(&Type{Name: "_timestamp", OID: TimestampArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[TimestampOID]}})
m.RegisterType(&Type{Name: "_timestamptz", OID: TimestamptzArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[TimestamptzOID]}})
m.RegisterType(&Type{Name: "_tsrange", OID: TsrangeArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[TsrangeOID]}})
m.RegisterType(&Type{Name: "_tstzrange", OID: TstzrangeArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[TstzrangeOID]}})
m.RegisterType(&Type{Name: "_uuid", OID: UUIDArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[UUIDOID]}})
m.RegisterType(&Type{Name: "_varbit", OID: VarbitArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[VarbitOID]}})
m.RegisterType(&Type{Name: "_varchar", OID: VarcharArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[VarcharOID]}})
m.RegisterType(&Type{Name: "_xid", OID: XIDArrayOID, Codec: &ArrayCodec{ElementType: m.oidToType[XIDOID]}})
// Integer types that directly map to a PostgreSQL type
registerDefaultPgTypeVariants[int16](m, "int2")
registerDefaultPgTypeVariants[int32](m, "int4")
registerDefaultPgTypeVariants[int64](m, "int8")
// Integer types that do not have a direct match to a PostgreSQL type
registerDefaultPgTypeVariants[int8](m, "int8")
registerDefaultPgTypeVariants[int](m, "int8")
registerDefaultPgTypeVariants[uint8](m, "int8")
registerDefaultPgTypeVariants[uint16](m, "int8")
registerDefaultPgTypeVariants[uint32](m, "int8")
registerDefaultPgTypeVariants[uint64](m, "numeric")
registerDefaultPgTypeVariants[uint](m, "numeric")
registerDefaultPgTypeVariants[float32](m, "float4")
registerDefaultPgTypeVariants[float64](m, "float8")
registerDefaultPgTypeVariants[bool](m, "bool")
registerDefaultPgTypeVariants[time.Time](m, "timestamptz")
registerDefaultPgTypeVariants[time.Duration](m, "interval")
registerDefaultPgTypeVariants[string](m, "text")
registerDefaultPgTypeVariants[[]byte](m, "bytea")
registerDefaultPgTypeVariants[net.IP](m, "inet")
registerDefaultPgTypeVariants[net.IPNet](m, "cidr")
registerDefaultPgTypeVariants[netip.Addr](m, "inet")
registerDefaultPgTypeVariants[netip.Prefix](m, "cidr")
// pgtype provided structs
registerDefaultPgTypeVariants[Bits](m, "varbit")
registerDefaultPgTypeVariants[Bool](m, "bool")
registerDefaultPgTypeVariants[Box](m, "box")
registerDefaultPgTypeVariants[Circle](m, "circle")
registerDefaultPgTypeVariants[Date](m, "date")
registerDefaultPgTypeVariants[Range[Date]](m, "daterange")
registerDefaultPgTypeVariants[Multirange[Range[Date]]](m, "datemultirange")
registerDefaultPgTypeVariants[Float4](m, "float4")
registerDefaultPgTypeVariants[Float8](m, "float8")
registerDefaultPgTypeVariants[Range[Float8]](m, "numrange") // There is no PostgreSQL builtin float8range so map it to numrange.
registerDefaultPgTypeVariants[Multirange[Range[Float8]]](m, "nummultirange") // There is no PostgreSQL builtin float8multirange so map it to nummultirange.
registerDefaultPgTypeVariants[Int2](m, "int2")
registerDefaultPgTypeVariants[Int4](m, "int4")
registerDefaultPgTypeVariants[Range[Int4]](m, "int4range")
registerDefaultPgTypeVariants[Multirange[Range[Int4]]](m, "int4multirange")
registerDefaultPgTypeVariants[Int8](m, "int8")
registerDefaultPgTypeVariants[Range[Int8]](m, "int8range")
registerDefaultPgTypeVariants[Multirange[Range[Int8]]](m, "int8multirange")
registerDefaultPgTypeVariants[Interval](m, "interval")
registerDefaultPgTypeVariants[Line](m, "line")
registerDefaultPgTypeVariants[Lseg](m, "lseg")
registerDefaultPgTypeVariants[Numeric](m, "numeric")
registerDefaultPgTypeVariants[Range[Numeric]](m, "numrange")
registerDefaultPgTypeVariants[Multirange[Range[Numeric]]](m, "nummultirange")
registerDefaultPgTypeVariants[Path](m, "path")
registerDefaultPgTypeVariants[Point](m, "point")
registerDefaultPgTypeVariants[Polygon](m, "polygon")
registerDefaultPgTypeVariants[TID](m, "tid")
registerDefaultPgTypeVariants[Text](m, "text")
registerDefaultPgTypeVariants[Time](m, "time")
registerDefaultPgTypeVariants[Timestamp](m, "timestamp")
registerDefaultPgTypeVariants[Timestamptz](m, "timestamptz")
registerDefaultPgTypeVariants[Range[Timestamp]](m, "tsrange")
registerDefaultPgTypeVariants[Multirange[Range[Timestamp]]](m, "tsmultirange")
registerDefaultPgTypeVariants[Range[Timestamptz]](m, "tstzrange")
registerDefaultPgTypeVariants[Multirange[Range[Timestamptz]]](m, "tstzmultirange")
registerDefaultPgTypeVariants[UUID](m, "uuid")
return m
}
func (m *Map) RegisterType(t *Type) {
m.oidToType[t.OID] = t
m.nameToType[t.Name] = t
m.oidToFormatCode[t.OID] = t.Codec.PreferredFormat()
// Invalidated by type registration
m.reflectTypeToType = nil
for k := range m.memoizedScanPlans {
delete(m.memoizedScanPlans, k)
}
}
// RegisterDefaultPgType registers a mapping of a Go type to a PostgreSQL type name. Typically the data type to be
// encoded or decoded is determined by the PostgreSQL OID. But if the OID of a value to be encoded or decoded is
// unknown, this additional mapping will be used by TypeForValue to determine a suitable data type.
func (m *Map) RegisterDefaultPgType(value any, name string) {
m.reflectTypeToName[reflect.TypeOf(value)] = name
// Invalidated by type registration
m.reflectTypeToType = nil
for k := range m.memoizedScanPlans {
delete(m.memoizedScanPlans, k)
}
}
func (m *Map) TypeForOID(oid uint32) (*Type, bool) {
dt, ok := m.oidToType[oid]
return dt, ok
}
func (m *Map) TypeForName(name string) (*Type, bool) {
dt, ok := m.nameToType[name]
return dt, ok
}
func (m *Map) buildReflectTypeToType() {
m.reflectTypeToType = make(map[reflect.Type]*Type)
for reflectType, name := range m.reflectTypeToName {
if dt, ok := m.nameToType[name]; ok {
m.reflectTypeToType[reflectType] = dt
}
}
}
// TypeForValue finds a data type suitable for v. Use RegisterType to register types that can encode and decode
// themselves. Use RegisterDefaultPgType to register that can be handled by a registered data type.
func (m *Map) TypeForValue(v any) (*Type, bool) {
if m.reflectTypeToType == nil {
m.buildReflectTypeToType()
}
dt, ok := m.reflectTypeToType[reflect.TypeOf(v)]
return dt, ok
}
// FormatCodeForOID returns the preferred format code for type oid. If the type is not registered it returns the text
// format code.
func (m *Map) FormatCodeForOID(oid uint32) int16 {
fc, ok := m.oidToFormatCode[oid]
if ok {
return fc
}
return TextFormatCode
}
// EncodePlan is a precompiled plan to encode a particular type into a particular OID and format.
type EncodePlan interface {
// Encode appends the encoded bytes of value to buf. If value is the SQL value NULL then append nothing and return
// (nil, nil). The caller of Encode is responsible for writing the correct NULL value or the length of the data
// written.
Encode(value any, buf []byte) (newBuf []byte, err error)
}
// ScanPlan is a precompiled plan to scan into a type of destination.
type ScanPlan interface {
// Scan scans src into target. src is only valid during the call to Scan. The ScanPlan must not retain a reference to
// src.
Scan(src []byte, target any) error
}
type scanPlanCodecSQLScanner struct {
c Codec
m *Map
oid uint32
formatCode int16
}
func (plan *scanPlanCodecSQLScanner) Scan(src []byte, dst any) error {
value, err := plan.c.DecodeDatabaseSQLValue(plan.m, plan.oid, plan.formatCode, src)
if err != nil {
return err
}
scanner := dst.(sql.Scanner)
return scanner.Scan(value)
}
type scanPlanSQLScanner struct {
formatCode int16
}
func (plan *scanPlanSQLScanner) Scan(src []byte, dst any) error {
scanner := dst.(sql.Scanner)
if src == nil {
// This is necessary because interface value []byte:nil does not equal nil:nil for the binary format path and the
// text format path would be converted to empty string.
return scanner.Scan(nil)
} else if plan.formatCode == BinaryFormatCode {
return scanner.Scan(src)
} else {
return scanner.Scan(string(src))
}
}
type scanPlanString struct{}
func (scanPlanString) Scan(src []byte, dst any) error {
if src == nil {
return fmt.Errorf("cannot scan NULL into %T", dst)
}
p := (dst).(*string)
*p = string(src)
return nil
}
type scanPlanAnyTextToBytes struct{}
func (scanPlanAnyTextToBytes) Scan(src []byte, dst any) error {
dstBuf := dst.(*[]byte)
if src == nil {
*dstBuf = nil
return nil
}
*dstBuf = make([]byte, len(src))
copy(*dstBuf, src)
return nil
}
type scanPlanFail struct {
m *Map
oid uint32
formatCode int16
}
func (plan *scanPlanFail) Scan(src []byte, dst any) error {
// If src is NULL it might be possible to scan into dst even though it is the types are not compatible. While this
// may seem to be a contrived case it can occur when selecting NULL directly. PostgreSQL assigns it the type of text.
// It would be surprising to the caller to have to cast the NULL (e.g. `select null::int`). So try to figure out a
// compatible data type for dst and scan with that.
//
// See https://github.com/jackc/pgx/issues/1326
if src == nil {
// As a horrible hack try all types to find anything that can scan into dst.
for oid := range plan.m.oidToType {
// using planScan instead of Scan or PlanScan to avoid polluting the planned scan cache.
plan := plan.m.planScan(oid, plan.formatCode, dst)
if _, ok := plan.(*scanPlanFail); !ok {
return plan.Scan(src, dst)
}
}
}
var format string
switch plan.formatCode {
case TextFormatCode:
format = "text"
case BinaryFormatCode:
format = "binary"
default:
format = fmt.Sprintf("unknown %d", plan.formatCode)
}
var dataTypeName string
if t, ok := plan.m.oidToType[plan.oid]; ok {
dataTypeName = t.Name
} else {
dataTypeName = "unknown type"
}
return fmt.Errorf("cannot scan %s (OID %d) in %v format into %T", dataTypeName, plan.oid, format, dst)
}
// TryWrapScanPlanFunc is a function that tries to create a wrapper plan for target. If successful it returns a plan
// that will convert the target passed to Scan and then call the next plan. nextTarget is target as it will be converted
// by plan. It must be used to find another suitable ScanPlan. When it is found SetNext must be called on plan for it
// to be usabled. ok indicates if a suitable wrapper was found.
type TryWrapScanPlanFunc func(target any) (plan WrappedScanPlanNextSetter, nextTarget any, ok bool)
type pointerPointerScanPlan struct {
dstType reflect.Type
next ScanPlan
}
func (plan *pointerPointerScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *pointerPointerScanPlan) Scan(src []byte, dst any) error {
el := reflect.ValueOf(dst).Elem()
if src == nil {
el.Set(reflect.Zero(el.Type()))
return nil
}
el.Set(reflect.New(el.Type().Elem()))
return plan.next.Scan(src, el.Interface())
}
// TryPointerPointerScanPlan handles a pointer to a pointer by setting the target to nil for SQL NULL and allocating and
// scanning for non-NULL.
func TryPointerPointerScanPlan(target any) (plan WrappedScanPlanNextSetter, nextTarget any, ok bool) {
if dstValue := reflect.ValueOf(target); dstValue.Kind() == reflect.Ptr {
elemValue := dstValue.Elem()
if elemValue.Kind() == reflect.Ptr {
plan = &pointerPointerScanPlan{dstType: dstValue.Type()}
return plan, reflect.Zero(elemValue.Type()).Interface(), true
}
}
return nil, nil, false
}
// SkipUnderlyingTypePlanner prevents PlanScan and PlanDecode from trying to use the underlying type.
type SkipUnderlyingTypePlanner interface {
SkipUnderlyingTypePlan()
}
var elemKindToPointerTypes map[reflect.Kind]reflect.Type = map[reflect.Kind]reflect.Type{
reflect.Int: reflect.TypeOf(new(int)),
reflect.Int8: reflect.TypeOf(new(int8)),
reflect.Int16: reflect.TypeOf(new(int16)),
reflect.Int32: reflect.TypeOf(new(int32)),
reflect.Int64: reflect.TypeOf(new(int64)),
reflect.Uint: reflect.TypeOf(new(uint)),
reflect.Uint8: reflect.TypeOf(new(uint8)),
reflect.Uint16: reflect.TypeOf(new(uint16)),
reflect.Uint32: reflect.TypeOf(new(uint32)),
reflect.Uint64: reflect.TypeOf(new(uint64)),
reflect.Float32: reflect.TypeOf(new(float32)),
reflect.Float64: reflect.TypeOf(new(float64)),
reflect.String: reflect.TypeOf(new(string)),
}
type underlyingTypeScanPlan struct {
dstType reflect.Type
nextDstType reflect.Type
next ScanPlan
}
func (plan *underlyingTypeScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *underlyingTypeScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, reflect.ValueOf(dst).Convert(plan.nextDstType).Interface())
}
// TryFindUnderlyingTypeScanPlan tries to convert to a Go builtin type. e.g. If value was of type MyString and
// MyString was defined as a string then a wrapper plan would be returned that converts MyString to string.
func TryFindUnderlyingTypeScanPlan(dst any) (plan WrappedScanPlanNextSetter, nextDst any, ok bool) {
if _, ok := dst.(SkipUnderlyingTypePlanner); ok {
return nil, nil, false
}
dstValue := reflect.ValueOf(dst)
if dstValue.Kind() == reflect.Ptr {
var elemValue reflect.Value
if dstValue.IsNil() {
elemValue = reflect.New(dstValue.Type().Elem()).Elem()
} else {
elemValue = dstValue.Elem()
}
nextDstType := elemKindToPointerTypes[elemValue.Kind()]
if nextDstType == nil && elemValue.Kind() == reflect.Slice {
if elemValue.Type().Elem().Kind() == reflect.Uint8 {
var v *[]byte
nextDstType = reflect.TypeOf(v)
}
}
if nextDstType != nil && dstValue.Type() != nextDstType {
return &underlyingTypeScanPlan{dstType: dstValue.Type(), nextDstType: nextDstType}, dstValue.Convert(nextDstType).Interface(), true
}
}
return nil, nil, false
}
type WrappedScanPlanNextSetter interface {
SetNext(ScanPlan)
ScanPlan
}
// TryWrapBuiltinTypeScanPlan tries to wrap a builtin type with a wrapper that provides additional methods. e.g. If
// value was of type int32 then a wrapper plan would be returned that converts target to a value that implements
// Int64Scanner.
func TryWrapBuiltinTypeScanPlan(target any) (plan WrappedScanPlanNextSetter, nextDst any, ok bool) {
switch target := target.(type) {
case *int8:
return &wrapInt8ScanPlan{}, (*int8Wrapper)(target), true
case *int16:
return &wrapInt16ScanPlan{}, (*int16Wrapper)(target), true
case *int32:
return &wrapInt32ScanPlan{}, (*int32Wrapper)(target), true
case *int64:
return &wrapInt64ScanPlan{}, (*int64Wrapper)(target), true
case *int:
return &wrapIntScanPlan{}, (*intWrapper)(target), true
case *uint8:
return &wrapUint8ScanPlan{}, (*uint8Wrapper)(target), true
case *uint16:
return &wrapUint16ScanPlan{}, (*uint16Wrapper)(target), true
case *uint32:
return &wrapUint32ScanPlan{}, (*uint32Wrapper)(target), true
case *uint64:
return &wrapUint64ScanPlan{}, (*uint64Wrapper)(target), true
case *uint:
return &wrapUintScanPlan{}, (*uintWrapper)(target), true
case *float32:
return &wrapFloat32ScanPlan{}, (*float32Wrapper)(target), true
case *float64:
return &wrapFloat64ScanPlan{}, (*float64Wrapper)(target), true
case *string:
return &wrapStringScanPlan{}, (*stringWrapper)(target), true
case *time.Time:
return &wrapTimeScanPlan{}, (*timeWrapper)(target), true
case *time.Duration:
return &wrapDurationScanPlan{}, (*durationWrapper)(target), true
case *net.IPNet:
return &wrapNetIPNetScanPlan{}, (*netIPNetWrapper)(target), true
case *net.IP:
return &wrapNetIPScanPlan{}, (*netIPWrapper)(target), true
case *netip.Prefix:
return &wrapNetipPrefixScanPlan{}, (*netipPrefixWrapper)(target), true
case *netip.Addr:
return &wrapNetipAddrScanPlan{}, (*netipAddrWrapper)(target), true
case *map[string]*string:
return &wrapMapStringToPointerStringScanPlan{}, (*mapStringToPointerStringWrapper)(target), true
case *map[string]string:
return &wrapMapStringToStringScanPlan{}, (*mapStringToStringWrapper)(target), true
case *[16]byte:
return &wrapByte16ScanPlan{}, (*byte16Wrapper)(target), true
case *[]byte:
return &wrapByteSliceScanPlan{}, (*byteSliceWrapper)(target), true
}
return nil, nil, false
}
type wrapInt8ScanPlan struct {
next ScanPlan
}
func (plan *wrapInt8ScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapInt8ScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*int8Wrapper)(dst.(*int8)))
}
type wrapInt16ScanPlan struct {
next ScanPlan
}
func (plan *wrapInt16ScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapInt16ScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*int16Wrapper)(dst.(*int16)))
}
type wrapInt32ScanPlan struct {
next ScanPlan
}
func (plan *wrapInt32ScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapInt32ScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*int32Wrapper)(dst.(*int32)))
}
type wrapInt64ScanPlan struct {
next ScanPlan
}
func (plan *wrapInt64ScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapInt64ScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*int64Wrapper)(dst.(*int64)))
}
type wrapIntScanPlan struct {
next ScanPlan
}
func (plan *wrapIntScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapIntScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*intWrapper)(dst.(*int)))
}
type wrapUint8ScanPlan struct {
next ScanPlan
}
func (plan *wrapUint8ScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapUint8ScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*uint8Wrapper)(dst.(*uint8)))
}
type wrapUint16ScanPlan struct {
next ScanPlan
}
func (plan *wrapUint16ScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapUint16ScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*uint16Wrapper)(dst.(*uint16)))
}
type wrapUint32ScanPlan struct {
next ScanPlan
}
func (plan *wrapUint32ScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapUint32ScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*uint32Wrapper)(dst.(*uint32)))
}
type wrapUint64ScanPlan struct {
next ScanPlan
}
func (plan *wrapUint64ScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapUint64ScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*uint64Wrapper)(dst.(*uint64)))
}
type wrapUintScanPlan struct {
next ScanPlan
}
func (plan *wrapUintScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapUintScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*uintWrapper)(dst.(*uint)))
}
type wrapFloat32ScanPlan struct {
next ScanPlan
}
func (plan *wrapFloat32ScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapFloat32ScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*float32Wrapper)(dst.(*float32)))
}
type wrapFloat64ScanPlan struct {
next ScanPlan
}
func (plan *wrapFloat64ScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapFloat64ScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*float64Wrapper)(dst.(*float64)))
}
type wrapStringScanPlan struct {
next ScanPlan
}
func (plan *wrapStringScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapStringScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*stringWrapper)(dst.(*string)))
}
type wrapTimeScanPlan struct {
next ScanPlan
}
func (plan *wrapTimeScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapTimeScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*timeWrapper)(dst.(*time.Time)))
}
type wrapDurationScanPlan struct {
next ScanPlan
}
func (plan *wrapDurationScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapDurationScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*durationWrapper)(dst.(*time.Duration)))
}
type wrapNetIPNetScanPlan struct {
next ScanPlan
}
func (plan *wrapNetIPNetScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapNetIPNetScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*netIPNetWrapper)(dst.(*net.IPNet)))
}
type wrapNetIPScanPlan struct {
next ScanPlan
}
func (plan *wrapNetIPScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapNetIPScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*netIPWrapper)(dst.(*net.IP)))
}
type wrapNetipPrefixScanPlan struct {
next ScanPlan
}
func (plan *wrapNetipPrefixScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapNetipPrefixScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*netipPrefixWrapper)(dst.(*netip.Prefix)))
}
type wrapNetipAddrScanPlan struct {
next ScanPlan
}
func (plan *wrapNetipAddrScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapNetipAddrScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*netipAddrWrapper)(dst.(*netip.Addr)))
}
type wrapMapStringToPointerStringScanPlan struct {
next ScanPlan
}
func (plan *wrapMapStringToPointerStringScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapMapStringToPointerStringScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*mapStringToPointerStringWrapper)(dst.(*map[string]*string)))
}
type wrapMapStringToStringScanPlan struct {
next ScanPlan
}
func (plan *wrapMapStringToStringScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapMapStringToStringScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*mapStringToStringWrapper)(dst.(*map[string]string)))
}
type wrapByte16ScanPlan struct {
next ScanPlan
}
func (plan *wrapByte16ScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapByte16ScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*byte16Wrapper)(dst.(*[16]byte)))
}
type wrapByteSliceScanPlan struct {
next ScanPlan
}
func (plan *wrapByteSliceScanPlan) SetNext(next ScanPlan) { plan.next = next }
func (plan *wrapByteSliceScanPlan) Scan(src []byte, dst any) error {
return plan.next.Scan(src, (*byteSliceWrapper)(dst.(*[]byte)))
}
type pointerEmptyInterfaceScanPlan struct {
codec Codec
m *Map
oid uint32
formatCode int16
}
func (plan *pointerEmptyInterfaceScanPlan) Scan(src []byte, dst any) error {