wehub-resource-sync
226 lines
8.3 KiB
Go
226 lines
8.3 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 binary
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import (
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"fmt"
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"github.com/dolthub/go-mysql-server/sql"
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gmstypes "github.com/dolthub/go-mysql-server/sql/types"
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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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// These functions can be gathered using the following query from a Postgres 15 instance:
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// SELECT * FROM pg_operator o WHERE o.oprname = '||' ORDER BY o.oprcode::varchar;
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// initBinaryConcatenate registers the functions to the catalog.
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func initBinaryConcatenate() {
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framework.RegisterBinaryFunction(framework.Operator_BinaryConcatenate, anytextcat)
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framework.RegisterBinaryFunction(framework.Operator_BinaryConcatenate, array_append)
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framework.RegisterBinaryFunction(framework.Operator_BinaryConcatenate, array_cat)
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framework.RegisterBinaryFunction(framework.Operator_BinaryConcatenate, array_prepend)
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framework.RegisterBinaryFunction(framework.Operator_BinaryConcatenate, byteacat)
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framework.RegisterBinaryFunction(framework.Operator_BinaryConcatenate, jsonb_concat)
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framework.RegisterBinaryFunction(framework.Operator_BinaryConcatenate, textanycat)
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framework.RegisterBinaryFunction(framework.Operator_BinaryConcatenate, textcat)
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// TODO: bitcat, tsquery_or, tsvector_concat
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}
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// anytextcat_callable is the callable logic for the anytextcat function.
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func anytextcat_callable(ctx *sql.Context, paramsAndReturn [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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valType := paramsAndReturn[0]
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val1String, err := valType.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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return val1String + val2.(string), nil
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}
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// anytextcat represents the PostgreSQL function of the same name, taking the same parameters.
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var anytextcat = framework.Function2{
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Name: "anytextcat",
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Return: pgtypes.Text,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.AnyNonArray, pgtypes.Text},
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Strict: true,
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Callable: anytextcat_callable,
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}
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// array_append represents the PostgreSQL function of the same name, taking the same parameters.
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var array_append = framework.Function2{
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Name: "array_append",
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Return: pgtypes.AnyArray, // TODO: should be anycompatiblearray
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.AnyArray, pgtypes.AnyElement}, // TODO: should be anycompatiblearray, anycompatible
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Strict: false,
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Callable: func(ctx *sql.Context, paramsAndReturn [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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if val1 == nil {
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return []any{val2}, nil
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}
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array := val1.([]any)
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returnArray := make([]any, len(array)+1)
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copy(returnArray, array)
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returnArray[len(returnArray)-1] = val2
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return returnArray, nil
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},
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}
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// array_cat represents the PostgreSQL function of the same name, taking the same parameters.
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var array_cat = framework.Function2{
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Name: "array_cat",
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Return: pgtypes.AnyArray, // TODO: should be anycompatiblearray
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.AnyArray, pgtypes.AnyArray}, // TODO: should be anycompatiblearray, anycompatiblearray
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Strict: false,
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Callable: func(ctx *sql.Context, paramsAndReturn [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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if val1 == nil && val2 == nil {
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return nil, nil
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} else if val1 == nil {
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return val2, nil
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} else if val2 == nil {
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return val1, nil
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}
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array1 := val1.([]any)
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array2 := val2.([]any)
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// Concatenate the arrays
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result := make([]any, len(array1)+len(array2))
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copy(result, array1)
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copy(result[len(array1):], array2)
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return result, nil
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},
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}
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// array_prepend represents the PostgreSQL function of the same name, taking the same parameters.
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var array_prepend = framework.Function2{
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Name: "array_prepend",
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Return: pgtypes.AnyArray, // TODO: should be anycompatiblearray
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.AnyElement, pgtypes.AnyArray}, // TODO: should be anycompatible, anycompatiblearray
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Strict: false,
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Callable: func(ctx *sql.Context, paramsAndReturn [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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if val2 == nil {
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return []any{val1}, nil
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}
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return append([]any{val1}, val2.([]any)...), nil
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},
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}
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// byteacat_callable is the callable logic for the byteacat function.
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func byteacat_callable(ctx *sql.Context, paramsAndReturn [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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v1 := val1.([]byte)
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v2 := val2.([]byte)
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copied := make([]byte, len(v1)+len(v2))
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copy(copied, v1)
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copy(copied[len(v1):], v2)
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return copied, nil
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}
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// byteacat represents the PostgreSQL function of the same name, taking the same parameters.
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var byteacat = framework.Function2{
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Name: "byteacat",
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Return: pgtypes.Bytea,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Bytea, pgtypes.Bytea},
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Strict: true,
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Callable: byteacat_callable,
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}
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// jsonb_concat_callable is the callable logic for the jsonb_concat function.
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func jsonb_concat_callable(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1Interface any, val2Interface any) (any, error) {
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// TODO: for two IndexedJsonDocuments, we could get much faster results on large documents by merging the underlying
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// JSON trees instead of loading them into memory. This would require a new method on sql.MutableJSON
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wrapper1, ok1 := val1Interface.(sql.JSONWrapper)
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wrapper2, ok2 := val2Interface.(sql.JSONWrapper)
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if !ok1 || !ok2 {
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return nil, fmt.Errorf("jsonb_concat: unexpected types %T, %T", val1Interface, val2Interface)
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}
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v1, err := wrapper1.ToInterface(ctx)
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if err != nil {
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return nil, err
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}
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v2, err := wrapper2.ToInterface(ctx)
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if err != nil {
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return nil, err
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}
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// Merge objects if both are objects
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obj1, isObj1 := v1.(map[string]interface{})
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obj2, isObj2 := v2.(map[string]interface{})
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if isObj1 && isObj2 {
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newObj := make(map[string]interface{}, len(obj1)+len(obj2))
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for k, v := range obj1 {
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newObj[k] = v
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}
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for k, v := range obj2 {
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newObj[k] = v
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}
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return gmstypes.JSONDocument{Val: newObj}, nil
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}
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// Not both objects: wrap non-arrays in single-element arrays and concatenate
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arr1, isArr1 := v1.([]interface{})
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arr2, isArr2 := v2.([]interface{})
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if !isArr1 {
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arr1 = []interface{}{v1}
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}
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if !isArr2 {
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arr2 = []interface{}{v2}
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}
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newArray := make([]interface{}, len(arr1)+len(arr2))
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copy(newArray, arr1)
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copy(newArray[len(arr1):], arr2)
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return gmstypes.JSONDocument{Val: newArray}, nil
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}
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// jsonb_concat represents the PostgreSQL function of the same name, taking the same parameters.
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var jsonb_concat = framework.Function2{
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Name: "jsonb_concat",
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Return: pgtypes.JsonB,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.JsonB, pgtypes.JsonB},
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Strict: true,
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Callable: jsonb_concat_callable,
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}
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// textanycat_callable is the callable logic for the textanycat function.
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func textanycat_callable(ctx *sql.Context, paramsAndReturn [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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valType := paramsAndReturn[1]
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val2String, err := valType.IoOutput(ctx, val2)
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if err != nil {
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return nil, err
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}
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return val1.(string) + val2String, nil
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}
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// textanycat represents the PostgreSQL function of the same name, taking the same parameters.
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var textanycat = framework.Function2{
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Name: "textanycat",
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Return: pgtypes.Text,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Text, pgtypes.AnyNonArray},
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Strict: true,
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Callable: textanycat_callable,
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}
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// textcat_callable is the callable logic for the textcat function.
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func textcat_callable(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
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return val1.(string) + val2.(string), nil
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}
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// textcat represents the PostgreSQL function of the same name, taking the same parameters.
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var textcat = framework.Function2{
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Name: "textcat",
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Return: pgtypes.Text,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Text, pgtypes.Text},
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Strict: true,
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Callable: textcat_callable,
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}
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