wehub-resource-sync
56 lines
1.8 KiB
Go
56 lines
1.8 KiB
Go
// Copyright 2025 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/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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// initArrayLength registers the functions to the catalog.
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func initArrayLength() {
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framework.RegisterFunction(array_length_anyarray_int32)
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}
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// array_length_anyarray_int32 represents the PostgreSQL function of the same name, taking the same parameters.
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var array_length_anyarray_int32 = framework.Function2{
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Name: "array_length",
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Return: pgtypes.Int32,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.AnyArray, pgtypes.Int32},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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array := val1.([]any)
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dimension := val2.(int32)
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// PostgreSQL arrays are 1-dimensional in this implementation
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// Dimension 0 is invalid, dimensions > 1 return null for 1D arrays
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if dimension <= 0 {
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return nil, nil
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}
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if dimension == 1 {
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if len(array) == 0 {
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return nil, nil
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}
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return int32(len(array)), nil
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}
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// For dimensions other than 1, return null (multi-dimensional arrays not fully supported)
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return nil, nil
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},
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}
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