extdef

type AccessMethod struct {
	Name    string
	Handler string
	Params  []AccessMethodParam
	// CheckParams validates the combination of storage parameter values, after defaults are applied.
	CheckParams func(params map[string]int64) error
}

type AccessMethodParam struct {
	Name    string
	Min     int64
	Max     int64
	Default int64
}

type Aggregate struct {
	Name        string
	Parameters  []Parameter
	Returns     string
	StateType   string
	Transition  string
	Final       string
	Combine     string
	InitCond    string
	HasInitCond bool
}

type Cast struct {
	Source   string
	Target   string
	Routine  string
	CastType casts.CastType
}

type Control struct {
	DefaultVersion string
	Comment        string
	Requires       []string
	Superuser      bool
	Trusted        bool
	Relocatable    bool
	Schema         string
}

type Extension struct {
	Name            string
	Control         Control
	Types           []Type
	Routines        []Routine
	Operators       []Operator
	Casts           []Cast
	Aggregates      []Aggregate
	OperatorClasses []OperatorClass
	AccessMethods   []AccessMethod
}

type Function func(ctx *sql.Context, args ...any) (any, error)

type Operator struct {
	Symbol     string
	Left       string
	Right      string
	Routine    string
	Commutator string
	Negator    string
	Hashes     bool
	Merges     bool
}

type OperatorClass struct {
	Name          string
	AccessMethods []string
	// DefaultFor lists the access methods where this is the default operator class for Type.
	DefaultFor []string
	Type       string
	// DistanceType is nil when index support for the class is not yet implemented.
	DistanceType vector.DistanceType
	// MaxDimensions caps the dimension count of an indexed column, when positive.
	MaxDimensions int32
}

type Parameter struct {
	Name string
	Type string
}

type Routine struct {
	Name       string
	Symbol     string
	Parameters []Parameter
	Returns    string
	Strict     bool
	Impl       Function
	// DistanceType is set on distance routines whose ascending order a vector index can serve.
	DistanceType vector.DistanceType
}

type Type struct {
	Name       string
	Definition pgtypes.BaseTypeDefinition
	Input      string
	Output     string
	Receive    string
	Send       string
	ModIn      string
	ModOut     string
	Compare    string
	// Codec stores values of the type natively instead of through the send and receive routines.
	Codec *pgtypes.TypeCodec
}