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Copy pathconverter.go
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3023 lines (2895 loc) · 97.8 KB
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package gosnowflake
import (
"bytes"
"context"
"database/sql"
"database/sql/driver"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
errors2 "github.com/snowflakedb/gosnowflake/v2/internal/errors"
"github.com/snowflakedb/gosnowflake/v2/internal/query"
"github.com/snowflakedb/gosnowflake/v2/internal/types"
"math"
"math/big"
"reflect"
"regexp"
"strconv"
"strings"
"time"
"github.com/apache/arrow-go/v18/arrow"
"github.com/apache/arrow-go/v18/arrow/array"
"github.com/apache/arrow-go/v18/arrow/decimal128"
ia "github.com/snowflakedb/gosnowflake/v2/internal/arrow"
)
const format = "2006-01-02 15:04:05.999999999"
const numberDefaultPrecision = 38
const jsonFormatStr = "json"
const numberMaxPrecisionInBits = 127
// 38 (max precision) + 1 (for possible '-') + 1 (for possible '.')
const decfloatPrintingPrec = 40
type timezoneType int
var errUnsupportedTimeArrayBind = errors.New("unsupported time array bind. Set the type to TimestampNTZType, TimestampLTZType, TimestampTZType, DateType or TimeType")
var errNativeArrowWithoutProperContext = errors.New("structured types must be enabled to use with native arrow")
const (
// TimestampNTZType denotes a NTZ timezoneType for array binds
TimestampNTZType timezoneType = iota
// TimestampLTZType denotes a LTZ timezoneType for array binds
TimestampLTZType
// TimestampTZType denotes a TZ timezoneType for array binds
TimestampTZType
// DateType denotes a date type for array binds
DateType
// TimeType denotes a time type for array binds
TimeType
)
type interfaceArrayBinding struct {
hasTimezone bool
tzType timezoneType
timezoneTypeArray any
}
func isInterfaceArrayBinding(t any) bool {
switch t.(type) {
case interfaceArrayBinding:
return true
case *interfaceArrayBinding:
return true
default:
return false
}
}
func isJSONFormatType(tsmode types.SnowflakeType) bool {
return tsmode == types.ObjectType || tsmode == types.ArrayType || tsmode == types.SliceType
}
// goTypeToSnowflake translates Go data type to Snowflake data type.
func goTypeToSnowflake(v driver.Value, tsmode types.SnowflakeType) types.SnowflakeType {
if isJSONFormatType(tsmode) {
return tsmode
}
if v == nil {
return types.NullType
}
switch t := v.(type) {
case int64, sql.NullInt64:
return types.FixedType
case float64, sql.NullFloat64:
return types.RealType
case bool, sql.NullBool:
return types.BooleanType
case string, sql.NullString:
return types.TextType
case []byte:
if tsmode == types.BinaryType {
return types.BinaryType // may be redundant but ensures BINARY type
}
if t == nil {
return types.NullType // invalid byte array. won't take as BINARY
}
if len(t) != 1 {
return types.ArrayType
}
if _, err := dataTypeMode(t); err != nil {
return types.UnSupportedType
}
return types.ChangeType
case time.Time, sql.NullTime:
return tsmode
}
if supportedArrayBind(&driver.NamedValue{Value: v}) {
return types.SliceType
}
// structured objects
if _, ok := v.(StructuredObjectWriter); ok {
return types.ObjectType
} else if _, ok := v.(reflect.Type); ok && tsmode == types.NilObjectType {
return types.NilObjectType
}
// structured arrays
if reflect.TypeOf(v).Kind() == reflect.Slice || (reflect.TypeOf(v).Kind() == reflect.Pointer && reflect.ValueOf(v).Elem().Kind() == reflect.Slice) {
return types.ArrayType
} else if tsmode == types.NilArrayType {
return types.NilArrayType
} else if tsmode == types.NilMapType {
return types.NilMapType
} else if reflect.TypeOf(v).Kind() == reflect.Map || (reflect.TypeOf(v).Kind() == reflect.Pointer && reflect.ValueOf(v).Elem().Kind() == reflect.Map) {
return types.MapType
}
return types.UnSupportedType
}
// snowflakeTypeToGo translates Snowflake data type to Go data type.
func snowflakeTypeToGo(ctx context.Context, dbtype types.SnowflakeType, precision int64, scale int64, fields []query.FieldMetadata) reflect.Type {
structuredTypesEnabled := structuredTypesEnabled(ctx)
switch dbtype {
case types.FixedType:
if higherPrecisionEnabled(ctx) {
if scale == 0 {
if precision >= 19 {
return reflect.TypeFor[*big.Int]()
}
return reflect.TypeFor[int64]()
}
return reflect.TypeFor[*big.Float]()
}
if scale == 0 {
if precision >= 19 {
return reflect.TypeFor[string]()
}
return reflect.TypeFor[int64]()
}
return reflect.TypeFor[float64]()
case types.RealType:
return reflect.TypeFor[float64]()
case types.DecfloatType:
if !decfloatMappingEnabled(ctx) {
return reflect.TypeFor[string]()
}
if higherPrecisionEnabled(ctx) {
return reflect.TypeFor[*big.Float]()
}
return reflect.TypeFor[float64]()
case types.TextType, types.VariantType:
return reflect.TypeFor[string]()
case types.DateType, types.TimeType, types.TimestampLtzType, types.TimestampNtzType, types.TimestampTzType:
return reflect.TypeOf(time.Now())
case types.BinaryType:
return reflect.TypeFor[[]byte]()
case types.BooleanType:
return reflect.TypeFor[bool]()
case types.ObjectType:
if len(fields) > 0 && structuredTypesEnabled {
return reflect.TypeFor[ObjectType]()
}
return reflect.TypeFor[string]()
case types.ArrayType:
if len(fields) == 0 || !structuredTypesEnabled {
return reflect.TypeFor[string]()
}
if len(fields) != 1 {
logger.WithContext(ctx).Warn("Unexpected fields number: " + strconv.Itoa(len(fields)))
return reflect.TypeFor[string]()
}
switch types.GetSnowflakeType(fields[0].Type) {
case types.FixedType:
if fields[0].Scale == 0 && higherPrecisionEnabled(ctx) {
return reflect.TypeFor[[]*big.Int]()
} else if fields[0].Scale == 0 && !higherPrecisionEnabled(ctx) {
return reflect.TypeFor[[]int64]()
} else if fields[0].Scale != 0 && higherPrecisionEnabled(ctx) {
return reflect.TypeFor[[]*big.Float]()
}
return reflect.TypeFor[[]float64]()
case types.RealType:
return reflect.TypeFor[[]float64]()
case types.TextType:
return reflect.TypeFor[[]string]()
case types.DateType, types.TimeType, types.TimestampLtzType, types.TimestampNtzType, types.TimestampTzType:
return reflect.TypeFor[[]time.Time]()
case types.BooleanType:
return reflect.TypeFor[[]bool]()
case types.BinaryType:
return reflect.TypeFor[[][]byte]()
case types.ObjectType:
return reflect.TypeFor[[]ObjectType]()
}
return nil
case types.MapType:
if !structuredTypesEnabled {
return reflect.TypeFor[string]()
}
switch types.GetSnowflakeType(fields[0].Type) {
case types.TextType:
return snowflakeTypeToGoForMaps[string](ctx, fields[1])
case types.FixedType:
return snowflakeTypeToGoForMaps[int64](ctx, fields[1])
}
return reflect.TypeFor[map[any]any]()
}
logger.WithContext(ctx).Errorf("unsupported dbtype is specified. %v", dbtype)
return reflect.TypeFor[string]()
}
func snowflakeTypeToGoForMaps[K comparable](ctx context.Context, valueMetadata query.FieldMetadata) reflect.Type {
switch types.GetSnowflakeType(valueMetadata.Type) {
case types.TextType:
return reflect.TypeFor[map[K]string]()
case types.FixedType:
if higherPrecisionEnabled(ctx) && valueMetadata.Scale == 0 {
return reflect.TypeFor[map[K]*big.Int]()
} else if higherPrecisionEnabled(ctx) && valueMetadata.Scale != 0 {
return reflect.TypeFor[map[K]*big.Float]()
} else if !higherPrecisionEnabled(ctx) && valueMetadata.Scale == 0 {
return reflect.TypeFor[map[K]int64]()
} else {
return reflect.TypeFor[map[K]float64]()
}
case types.RealType:
return reflect.TypeFor[map[K]float64]()
case types.BooleanType:
return reflect.TypeFor[map[K]bool]()
case types.BinaryType:
return reflect.TypeFor[map[K][]byte]()
case types.TimeType, types.DateType, types.TimestampTzType, types.TimestampNtzType, types.TimestampLtzType:
return reflect.TypeFor[map[K]time.Time]()
}
logger.WithContext(ctx).Errorf("unsupported dbtype is specified for map value")
return reflect.TypeFor[string]()
}
// valueToString converts arbitrary golang type to a string. This is mainly used in binding data with placeholders
// in queries.
func valueToString(v driver.Value, tsmode types.SnowflakeType, params *syncParams) (bindingValue, error) {
isJSONFormat := isJSONFormatType(tsmode)
if v == nil {
if isJSONFormat {
return bindingValue{nil, jsonFormatStr, nil}, nil
}
return bindingValue{nil, "", nil}, nil
}
v1 := reflect.Indirect(reflect.ValueOf(v))
if valuer, ok := v.(driver.Valuer); ok { // check for driver.Valuer satisfaction and honor that first
if value, err := valuer.Value(); err == nil && value != nil {
// if the output value is a valid string, return that
if strVal, ok := value.(string); ok {
if isJSONFormat {
return bindingValue{&strVal, jsonFormatStr, nil}, nil
}
return bindingValue{&strVal, "", nil}, nil
}
}
}
if tsmode == types.DecfloatType && v1.Type() == reflect.TypeFor[big.Float]() {
s := v.(*big.Float).Text('g', decfloatPrintingPrec)
return bindingValue{&s, "", nil}, nil
}
switch v1.Kind() {
case reflect.Bool:
s := strconv.FormatBool(v1.Bool())
return bindingValue{&s, "", nil}, nil
case reflect.Int64:
s := strconv.FormatInt(v1.Int(), 10)
return bindingValue{&s, "", nil}, nil
case reflect.Float64:
s := strconv.FormatFloat(v1.Float(), 'g', -1, 32)
return bindingValue{&s, "", nil}, nil
case reflect.String:
s := v1.String()
if isJSONFormat {
return bindingValue{&s, jsonFormatStr, nil}, nil
}
return bindingValue{&s, "", nil}, nil
case reflect.Slice, reflect.Array:
return arrayToString(v, tsmode, params)
case reflect.Map:
return mapToString(v, tsmode, params)
case reflect.Struct:
return structValueToString(v, tsmode, params)
}
return bindingValue{}, fmt.Errorf("unsupported type: %v", v1.Kind())
}
// isUUIDImplementer checks if a value is a UUID that satisfies RFC 4122
func isUUIDImplementer(v reflect.Value) bool {
rt := v.Type()
// Check if the type is an array of 16 bytes
if v.Kind() == reflect.Array && rt.Elem().Kind() == reflect.Uint8 && rt.Len() == 16 {
// Check if the type implements fmt.Stringer
vInt := v.Interface()
if stringer, ok := vInt.(fmt.Stringer); ok {
uuidStr := stringer.String()
rfc4122Regex := `^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$`
matched, err := regexp.MatchString(rfc4122Regex, uuidStr)
if err != nil {
return false
}
if matched {
// parse the UUID and ensure it is the same as the original string
u := ParseUUID(uuidStr)
return u.String() == uuidStr
}
}
}
return false
}
func arrayToString(v driver.Value, tsmode types.SnowflakeType, params *syncParams) (bindingValue, error) {
v1 := reflect.Indirect(reflect.ValueOf(v))
if v1.Kind() == reflect.Slice && v1.IsNil() {
return bindingValue{nil, jsonFormatStr, nil}, nil
}
if bd, ok := v.([][]byte); ok && tsmode == types.BinaryType {
schema := bindingSchema{
Typ: "array",
Nullable: true,
Fields: []query.FieldMetadata{
{
Type: "binary",
Nullable: true,
},
},
}
if len(bd) == 0 {
res := "[]"
return bindingValue{value: &res, format: jsonFormatStr, schema: &schema}, nil
}
s := ""
for _, b := range bd {
s += "\"" + hex.EncodeToString(b) + "\","
}
s = "[" + s[:len(s)-1] + "]"
return bindingValue{&s, jsonFormatStr, &schema}, nil
} else if times, ok := v.([]time.Time); ok {
typ := types.DriverTypeToSnowflake[tsmode]
sfFormat, err := dateTimeInputFormatByType(typ, params)
if err != nil {
return bindingValue{nil, "", nil}, err
}
goFormat, err := snowflakeFormatToGoFormat(sfFormat)
if err != nil {
return bindingValue{nil, "", nil}, err
}
arr := make([]string, len(times))
for idx, t := range times {
arr[idx] = t.Format(goFormat)
}
res, err := json.Marshal(arr)
if err != nil {
return bindingValue{nil, jsonFormatStr, &bindingSchema{
Typ: "array",
Nullable: true,
Fields: []query.FieldMetadata{
{
Type: typ,
Nullable: true,
},
},
}}, err
}
resString := string(res)
return bindingValue{&resString, jsonFormatStr, nil}, nil
} else if isArrayOfStructs(v) {
stringEntries := make([]string, v1.Len())
sowcForSingleElement, err := buildSowcFromType(params, reflect.TypeOf(v).Elem())
if err != nil {
return bindingValue{}, err
}
for i := 0; i < v1.Len(); i++ {
potentialSow := v1.Index(i)
if sow, ok := potentialSow.Interface().(StructuredObjectWriter); ok {
bv, err := structValueToString(sow, tsmode, params)
if err != nil {
return bindingValue{nil, jsonFormatStr, nil}, err
}
stringEntries[i] = *bv.value
}
}
value := "[" + strings.Join(stringEntries, ",") + "]"
arraySchema := &bindingSchema{
Typ: "array",
Nullable: true,
Fields: []query.FieldMetadata{
{
Type: "OBJECT",
Nullable: true,
Fields: sowcForSingleElement.toFields(),
},
},
}
return bindingValue{&value, jsonFormatStr, arraySchema}, nil
} else if reflect.ValueOf(v).Len() == 0 {
value := "[]"
return bindingValue{&value, jsonFormatStr, nil}, nil
} else if barr, ok := v.([]byte); ok {
if tsmode == types.BinaryType {
res := hex.EncodeToString(barr)
return bindingValue{&res, jsonFormatStr, nil}, nil
}
schemaForBytes := bindingSchema{
Typ: "array",
Nullable: true,
Fields: []query.FieldMetadata{
{
Type: "FIXED",
Nullable: true,
},
},
}
if len(barr) == 0 {
res := "[]"
return bindingValue{&res, jsonFormatStr, &schemaForBytes}, nil
}
res := "["
for _, b := range barr {
res += fmt.Sprint(b) + ","
}
res = res[0:len(res)-1] + "]"
return bindingValue{&res, jsonFormatStr, &schemaForBytes}, nil
} else if isUUIDImplementer(v1) { // special case for UUIDs (snowflake type and other implementers)
stringer := v.(fmt.Stringer) // we don't need to validate if it's a fmt.Stringer because we already checked if it's a UUID type with a stringer
value := stringer.String()
return bindingValue{&value, "", nil}, nil
} else if isSliceOfSlices(v) {
return bindingValue{}, errors.New("array of arrays is not supported")
}
res, err := json.Marshal(v)
if err != nil {
return bindingValue{nil, jsonFormatStr, nil}, err
}
resString := string(res)
return bindingValue{&resString, jsonFormatStr, nil}, nil
}
func mapToString(v driver.Value, tsmode types.SnowflakeType, params *syncParams) (bindingValue, error) {
var err error
valOf := reflect.Indirect(reflect.ValueOf(v))
if valOf.IsNil() {
return bindingValue{nil, "", nil}, nil
}
typOf := reflect.TypeOf(v)
var jsonBytes []byte
if tsmode == types.BinaryType {
m := make(map[string]*string, valOf.Len())
iter := valOf.MapRange()
for iter.Next() {
val := iter.Value().Interface().([]byte)
if val != nil {
s := hex.EncodeToString(val)
m[stringOrIntToString(iter.Key())] = &s
} else {
m[stringOrIntToString(iter.Key())] = nil
}
}
jsonBytes, err = json.Marshal(m)
if err != nil {
return bindingValue{}, err
}
} else if typOf.Elem().AssignableTo(reflect.TypeFor[time.Time]()) || typOf.Elem().AssignableTo(reflect.TypeFor[sql.NullTime]()) {
m := make(map[string]*string, valOf.Len())
iter := valOf.MapRange()
for iter.Next() {
val, valid, err := toNullableTime(iter.Value().Interface())
if err != nil {
return bindingValue{}, err
}
if !valid {
m[stringOrIntToString(iter.Key())] = nil
} else {
typ := types.DriverTypeToSnowflake[tsmode]
s, err := timeToString(val, typ, params)
if err != nil {
return bindingValue{}, err
}
m[stringOrIntToString(iter.Key())] = &s
}
}
jsonBytes, err = json.Marshal(m)
if err != nil {
return bindingValue{}, err
}
} else if typOf.Elem().AssignableTo(reflect.TypeFor[sql.NullString]()) {
m := make(map[string]*string, valOf.Len())
iter := valOf.MapRange()
for iter.Next() {
val := iter.Value().Interface().(sql.NullString)
if val.Valid {
m[stringOrIntToString(iter.Key())] = &val.String
} else {
m[stringOrIntToString(iter.Key())] = nil
}
}
jsonBytes, err = json.Marshal(m)
if err != nil {
return bindingValue{}, err
}
} else if typOf.Elem().AssignableTo(reflect.TypeFor[sql.NullByte]()) || typOf.Elem().AssignableTo(reflect.TypeFor[sql.NullInt16]()) || typOf.Elem().AssignableTo(reflect.TypeFor[sql.NullInt32]()) || typOf.Elem().AssignableTo(reflect.TypeFor[sql.NullInt64]()) {
m := make(map[string]*int64, valOf.Len())
iter := valOf.MapRange()
for iter.Next() {
val, valid := toNullableInt64(iter.Value().Interface())
if valid {
m[stringOrIntToString(iter.Key())] = &val
} else {
m[stringOrIntToString(iter.Key())] = nil
}
}
jsonBytes, err = json.Marshal(m)
if err != nil {
return bindingValue{}, err
}
} else if typOf.Elem().AssignableTo(reflect.TypeFor[sql.NullFloat64]()) {
m := make(map[string]*float64, valOf.Len())
iter := valOf.MapRange()
for iter.Next() {
val := iter.Value().Interface().(sql.NullFloat64)
if val.Valid {
m[stringOrIntToString(iter.Key())] = &val.Float64
} else {
m[stringOrIntToString(iter.Key())] = nil
}
}
jsonBytes, err = json.Marshal(m)
if err != nil {
return bindingValue{}, err
}
} else if typOf.Elem().AssignableTo(reflect.TypeFor[sql.NullBool]()) {
m := make(map[string]*bool, valOf.Len())
iter := valOf.MapRange()
for iter.Next() {
val := iter.Value().Interface().(sql.NullBool)
if val.Valid {
m[stringOrIntToString(iter.Key())] = &val.Bool
} else {
m[stringOrIntToString(iter.Key())] = nil
}
}
jsonBytes, err = json.Marshal(m)
if err != nil {
return bindingValue{}, err
}
} else if typOf.Elem().AssignableTo(structuredObjectWriterType) {
m := make(map[string]map[string]any, valOf.Len())
iter := valOf.MapRange()
var valueMetadata *query.FieldMetadata
for iter.Next() {
sowc := structuredObjectWriterContext{}
sowc.init(params)
if iter.Value().IsNil() {
m[stringOrIntToString(iter.Key())] = nil
continue
}
err = iter.Value().Interface().(StructuredObjectWriter).Write(&sowc)
if err != nil {
return bindingValue{}, err
}
m[stringOrIntToString(iter.Key())] = sowc.values
if valueMetadata == nil {
valueMetadata = &query.FieldMetadata{
Type: "OBJECT",
Nullable: true,
Fields: sowc.toFields(),
}
}
}
if valueMetadata == nil {
sowcFromValueType, err := buildSowcFromType(params, typOf.Elem())
if err != nil {
return bindingValue{}, err
}
valueMetadata = &query.FieldMetadata{
Type: "OBJECT",
Nullable: true,
Fields: sowcFromValueType.toFields(),
}
}
jsonBytes, err = json.Marshal(m)
if err != nil {
return bindingValue{}, err
}
jsonString := string(jsonBytes)
keyMetadata, err := goTypeToFieldMetadata(typOf.Key(), types.TextType, params)
if err != nil {
return bindingValue{}, err
}
schema := bindingSchema{
Typ: "MAP",
Fields: []query.FieldMetadata{keyMetadata, *valueMetadata},
}
return bindingValue{&jsonString, jsonFormatStr, &schema}, nil
} else {
jsonBytes, err = json.Marshal(v)
if err != nil {
return bindingValue{}, err
}
}
jsonString := string(jsonBytes)
keyMetadata, err := goTypeToFieldMetadata(typOf.Key(), types.TextType, params)
if err != nil {
return bindingValue{}, err
}
valueMetadata, err := goTypeToFieldMetadata(typOf.Elem(), tsmode, params)
if err != nil {
return bindingValue{}, err
}
schema := bindingSchema{
Typ: "MAP",
Fields: []query.FieldMetadata{keyMetadata, valueMetadata},
}
return bindingValue{&jsonString, jsonFormatStr, &schema}, nil
}
func toNullableInt64(val any) (int64, bool) {
switch v := val.(type) {
case sql.NullByte:
return int64(v.Byte), v.Valid
case sql.NullInt16:
return int64(v.Int16), v.Valid
case sql.NullInt32:
return int64(v.Int32), v.Valid
case sql.NullInt64:
return v.Int64, v.Valid
}
// should never happen, the list above is exhaustive
panic("Only byte, int16, int32 or int64 are supported")
}
func toNullableTime(val any) (time.Time, bool, error) {
switch v := val.(type) {
case time.Time:
return v, true, nil
case sql.NullTime:
return v.Time, v.Valid, nil
}
return time.Now(), false, fmt.Errorf("cannot use %T as time", val)
}
func stringOrIntToString(v reflect.Value) string {
if v.CanInt() {
return strconv.Itoa(int(v.Int()))
}
return v.String()
}
func goTypeToFieldMetadata(typ reflect.Type, tsmode types.SnowflakeType, params *syncParams) (query.FieldMetadata, error) {
if tsmode == types.BinaryType {
return query.FieldMetadata{
Type: "BINARY",
Nullable: true,
}, nil
}
if typ.Kind() == reflect.Pointer {
typ = typ.Elem()
}
switch typ.Kind() {
case reflect.String:
return query.FieldMetadata{
Type: "TEXT",
Nullable: true,
}, nil
case reflect.Bool:
return query.FieldMetadata{
Type: "BOOLEAN",
Nullable: true,
}, nil
case reflect.Int, reflect.Int8, reflect.Uint8, reflect.Int16, reflect.Int32, reflect.Int64:
return query.FieldMetadata{
Type: "FIXED",
Precision: numberDefaultPrecision,
Nullable: true,
}, nil
case reflect.Float32, reflect.Float64:
return query.FieldMetadata{
Type: "REAL",
Nullable: true,
}, nil
case reflect.Struct:
if typ.AssignableTo(reflect.TypeFor[sql.NullString]()) {
return query.FieldMetadata{
Type: "TEXT",
Nullable: true,
}, nil
} else if typ.AssignableTo(reflect.TypeFor[sql.NullBool]()) {
return query.FieldMetadata{
Type: "BOOLEAN",
Nullable: true,
}, nil
} else if typ.AssignableTo(reflect.TypeFor[sql.NullByte]()) || typ.AssignableTo(reflect.TypeFor[sql.NullInt16]()) || typ.AssignableTo(reflect.TypeFor[sql.NullInt32]()) || typ.AssignableTo(reflect.TypeFor[sql.NullInt64]()) {
return query.FieldMetadata{
Type: "FIXED",
Precision: numberDefaultPrecision,
Nullable: true,
}, nil
} else if typ.AssignableTo(reflect.TypeFor[sql.NullFloat64]()) {
return query.FieldMetadata{
Type: "REAL",
Nullable: true,
}, nil
} else if tsmode == types.DateType {
return query.FieldMetadata{
Type: "DATE",
Nullable: true,
}, nil
} else if tsmode == types.TimeType {
return query.FieldMetadata{
Type: "TIME",
Nullable: true,
}, nil
} else if tsmode == types.TimestampTzType {
return query.FieldMetadata{
Type: "TIMESTAMP_TZ",
Nullable: true,
}, nil
} else if tsmode == types.TimestampNtzType {
return query.FieldMetadata{
Type: "TIMESTAMP_NTZ",
Nullable: true,
}, nil
} else if tsmode == types.TimestampLtzType {
return query.FieldMetadata{
Type: "TIMESTAMP_LTZ",
Nullable: true,
}, nil
} else if typ.AssignableTo(structuredObjectWriterType) || tsmode == types.NilObjectType {
sowc, err := buildSowcFromType(params, typ)
if err != nil {
return query.FieldMetadata{}, err
}
return query.FieldMetadata{
Type: "OBJECT",
Nullable: true,
Fields: sowc.toFields(),
}, nil
} else if tsmode == types.NilArrayType || tsmode == types.NilMapType {
sowc, err := buildSowcFromType(params, typ)
if err != nil {
return query.FieldMetadata{}, err
}
return query.FieldMetadata{
Type: "OBJECT",
Nullable: true,
Fields: sowc.toFields(),
}, nil
}
case reflect.Slice:
metadata, err := goTypeToFieldMetadata(typ.Elem(), tsmode, params)
if err != nil {
return query.FieldMetadata{}, err
}
return query.FieldMetadata{
Type: "ARRAY",
Nullable: true,
Fields: []query.FieldMetadata{metadata},
}, nil
case reflect.Map:
keyMetadata, err := goTypeToFieldMetadata(typ.Key(), tsmode, params)
if err != nil {
return query.FieldMetadata{}, err
}
valueMetadata, err := goTypeToFieldMetadata(typ.Elem(), tsmode, params)
if err != nil {
return query.FieldMetadata{}, err
}
return query.FieldMetadata{
Type: "MAP",
Nullable: true,
Fields: []query.FieldMetadata{keyMetadata, valueMetadata},
}, nil
}
return query.FieldMetadata{}, fmt.Errorf("cannot build field metadata for %v (mode %v)", typ.Kind().String(), tsmode.String())
}
func isSliceOfSlices(v any) bool {
typ := reflect.TypeOf(v)
return typ.Kind() == reflect.Slice && typ.Elem().Kind() == reflect.Slice
}
func isArrayOfStructs(v any) bool {
return reflect.TypeOf(v).Elem().Kind() == reflect.Struct || (reflect.TypeOf(v).Elem().Kind() == reflect.Pointer && reflect.TypeOf(v).Elem().Elem().Kind() == reflect.Struct)
}
func structValueToString(v driver.Value, tsmode types.SnowflakeType, params *syncParams) (bindingValue, error) {
switch typedVal := v.(type) {
case time.Time:
return timeTypeValueToString(typedVal, tsmode)
case sql.NullTime:
if !typedVal.Valid {
return bindingValue{nil, "", nil}, nil
}
return timeTypeValueToString(typedVal.Time, tsmode)
case sql.NullBool:
if !typedVal.Valid {
return bindingValue{nil, "", nil}, nil
}
s := strconv.FormatBool(typedVal.Bool)
return bindingValue{&s, "", nil}, nil
case sql.NullInt64:
if !typedVal.Valid {
return bindingValue{nil, "", nil}, nil
}
s := strconv.FormatInt(typedVal.Int64, 10)
return bindingValue{&s, "", nil}, nil
case sql.NullFloat64:
if !typedVal.Valid {
return bindingValue{nil, "", nil}, nil
}
s := strconv.FormatFloat(typedVal.Float64, 'g', -1, 32)
return bindingValue{&s, "", nil}, nil
case sql.NullString:
fmt := ""
if isJSONFormatType(tsmode) {
fmt = jsonFormatStr
}
if !typedVal.Valid {
return bindingValue{nil, fmt, nil}, nil
}
return bindingValue{&typedVal.String, fmt, nil}, nil
}
if sow, ok := v.(StructuredObjectWriter); ok {
sowc := &structuredObjectWriterContext{}
sowc.init(params)
err := sow.Write(sowc)
if err != nil {
return bindingValue{nil, "", nil}, err
}
jsonBytes, err := json.Marshal(sowc.values)
if err != nil {
return bindingValue{nil, "", nil}, err
}
jsonString := string(jsonBytes)
schema := bindingSchema{
Typ: "object",
Nullable: true,
Fields: sowc.toFields(),
}
return bindingValue{&jsonString, jsonFormatStr, &schema}, nil
} else if typ, ok := v.(reflect.Type); ok && tsmode == types.NilArrayType {
metadata, err := goTypeToFieldMetadata(typ, tsmode, params)
if err != nil {
return bindingValue{}, err
}
schema := bindingSchema{
Typ: "ARRAY",
Nullable: true,
Fields: []query.FieldMetadata{
metadata,
},
}
return bindingValue{nil, jsonFormatStr, &schema}, nil
} else if t, ok := v.(NilMapTypes); ok && tsmode == types.NilMapType {
keyMetadata, err := goTypeToFieldMetadata(t.Key, tsmode, params)
if err != nil {
return bindingValue{}, err
}
valueMetadata, err := goTypeToFieldMetadata(t.Value, tsmode, params)
if err != nil {
return bindingValue{}, err
}
schema := bindingSchema{
Typ: "map",
Nullable: true,
Fields: []query.FieldMetadata{keyMetadata, valueMetadata},
}
return bindingValue{nil, jsonFormatStr, &schema}, nil
} else if typ, ok := v.(reflect.Type); ok && tsmode == types.NilObjectType {
metadata, err := goTypeToFieldMetadata(typ, tsmode, params)
if err != nil {
return bindingValue{}, err
}
schema := bindingSchema{
Typ: "object",
Nullable: true,
Fields: metadata.Fields,
}
return bindingValue{nil, jsonFormatStr, &schema}, nil
}
return bindingValue{}, fmt.Errorf("unknown binding for type %T and mode %v", v, tsmode)
}
func timeTypeValueToString(tm time.Time, tsmode types.SnowflakeType) (bindingValue, error) {
switch tsmode {
case types.DateType:
_, offset := tm.Zone()
tm = tm.Add(time.Second * time.Duration(offset))
s := strconv.FormatInt(tm.Unix()*1000, 10)
return bindingValue{&s, "", nil}, nil
case types.TimeType:
s := fmt.Sprintf("%d",
(tm.Hour()*3600+tm.Minute()*60+tm.Second())*1e9+tm.Nanosecond())
return bindingValue{&s, "", nil}, nil
case types.TimestampNtzType, types.TimestampLtzType, types.TimestampTzType:
s, err := convertTimeToTimeStamp(tm, tsmode)
if err != nil {
return bindingValue{nil, "", nil}, err
}
return bindingValue{&s, "", nil}, nil
}
return bindingValue{nil, "", nil}, fmt.Errorf("unsupported time type: %v", tsmode)
}
// extractTimestamp extracts the internal timestamp data to epoch time in seconds and milliseconds
func extractTimestamp(srcValue *string) (sec int64, nsec int64, err error) {
logger.Debugf("SRC: %v", srcValue)
var i int
for i = 0; i < len(*srcValue); i++ {
if (*srcValue)[i] == '.' {
sec, err = strconv.ParseInt((*srcValue)[0:i], 10, 64)
if err != nil {
return 0, 0, err
}
break
}
}
if i == len(*srcValue) {
// no fraction
sec, err = strconv.ParseInt(*srcValue, 10, 64)
if err != nil {
return 0, 0, err
}
nsec = 0
} else {
s := (*srcValue)[i+1:]
nsec, err = strconv.ParseInt(s+strings.Repeat("0", 9-len(s)), 10, 64)
if err != nil {
return 0, 0, err
}
}
logger.Infof("sec: %v, nsec: %v", sec, nsec)
return sec, nsec, nil
}
// stringToValue converts a pointer of string data to an arbitrary golang variable
// This is mainly used in fetching data.
func stringToValue(ctx context.Context, dest *driver.Value, srcColumnMeta query.ExecResponseRowType, srcValue *string, loc *time.Location, params *syncParams) error {
if srcValue == nil {
logger.Debugf("snowflake data type: %v, raw value: nil", srcColumnMeta.Type)
*dest = nil
return nil
}
structuredTypesEnabled := structuredTypesEnabled(ctx)
// Truncate large strings before logging to avoid secret masking performance issues
valueForLogging := *srcValue
if len(valueForLogging) > 1024 {
valueForLogging = valueForLogging[:1024] + fmt.Sprintf("... (%d bytes total)", len(*srcValue))
}
logger.Debugf("snowflake data type: %v, raw value: %v", srcColumnMeta.Type, valueForLogging)
switch srcColumnMeta.Type {
case "object":
if len(srcColumnMeta.Fields) == 0 || !structuredTypesEnabled {
// semistructured type without schema
*dest = *srcValue
return nil
}
m := make(map[string]any)
decoder := decoderWithNumbersAsStrings(srcValue)
if err := decoder.Decode(&m); err != nil {
return err
}
v, err := buildStructuredTypeRecursive(ctx, m, srcColumnMeta.Fields, params)
if err != nil {
return err
}
*dest = v
return nil
case "text", "real", "variant":
*dest = *srcValue
return nil
case "fixed":
if higherPrecisionEnabled(ctx) {
if srcColumnMeta.Scale == 0 {
if srcColumnMeta.Precision >= 19 {
bigInt := big.NewInt(0)