wehub-resource-sync
69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
// Copyright 2026 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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"strings"
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"github.com/dolthub/go-mysql-server/sql"
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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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// initConcat registers the functions to the catalog.
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func initConcat() {
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framework.RegisterFunction(concat_any)
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}
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// concat_any represents the PostgreSQL function of the same name, taking the same parameters.
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var concat_any = framework.Function1N{
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Name: "concat",
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Return: pgtypes.Text,
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Parameters: [1]*pgtypes.DoltgresType{pgtypes.Any},
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Strict: false,
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Callable: func(ctx *sql.Context, t []*pgtypes.DoltgresType, val1 any, vals []any) (any, error) {
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sb := strings.Builder{}
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if val1 != nil {
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output, err := t[0].IoOutput(ctx, val1)
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if err != nil {
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return nil, err
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}
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sb.WriteString(output)
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}
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for i, val := range vals {
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if val == nil {
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continue
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}
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valType := t[i+1]
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if valType.ID == pgtypes.Bool.ID {
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// Within this context, `bool` returns 't' rather than 'true'
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if val.(bool) {
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sb.WriteRune('t')
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} else {
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sb.WriteRune('f')
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}
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} else {
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output, err := valType.IoOutput(ctx, val)
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if err != nil {
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return nil, err
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}
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sb.WriteString(output)
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}
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}
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return sb.String(), nil
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},
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}
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