wehub-resource-sync
96 lines
3.0 KiB
Go
96 lines
3.0 KiB
Go
// Copyright 2024 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package functions
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import (
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"github.com/cockroachdb/errors"
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/doltgresql/utils"
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"github.com/dolthub/doltgresql/server/functions/framework"
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pgtypes "github.com/dolthub/doltgresql/server/types"
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)
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// initUnknown registers the functions to the catalog.
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func initUnknown() {
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framework.RegisterFunction(unknownin)
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framework.RegisterFunction(unknownout)
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framework.RegisterFunction(unknownrecv)
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framework.RegisterFunction(unknownsend)
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}
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// unknownin represents the PostgreSQL function of unknown type IO input.
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var unknownin = framework.Function1{
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Name: "unknownin",
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Return: pgtypes.Unknown,
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Parameters: [1]*pgtypes.DoltgresType{pgtypes.Cstring},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
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return val.(string), nil
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},
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}
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// unknownout represents the PostgreSQL function of unknown type IO output.
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var unknownout = framework.Function1{
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Name: "unknownout",
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Return: pgtypes.Cstring,
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Parameters: [1]*pgtypes.DoltgresType{pgtypes.Unknown},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
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return val.(string), nil
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},
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}
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// unknownrecv represents the PostgreSQL function of unknown type IO receive.
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var unknownrecv = framework.Function1{
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Name: "unknownrecv",
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Return: pgtypes.Unknown,
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Parameters: [1]*pgtypes.DoltgresType{pgtypes.Internal},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
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data := val.([]byte)
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reader := utils.NewReader(data)
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return reader.String(), nil
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},
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}
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// unknownsend represents the PostgreSQL function of unknown type IO send.
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var unknownsend = framework.Function1{
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Name: "unknownsend",
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Return: pgtypes.Bytea,
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Parameters: [1]*pgtypes.DoltgresType{pgtypes.Unknown},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
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if wrapper, ok := val.(sql.AnyWrapper); ok {
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var err error
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val, err = wrapper.UnwrapAny(ctx)
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if err != nil {
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return nil, err
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}
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if val == nil {
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return nil, nil
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}
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}
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str, ok := val.(string)
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if !ok {
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return nil, errors.Errorf(`non-string value encountered while converting "UNKNOWN" to binary wire format:\n%T`, val)
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}
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writer := utils.NewWireWriter()
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writer.WriteString(str)
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return writer.BufferData(), nil
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},
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}
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