wehub-resource-sync
114 lines
3.1 KiB
Go
114 lines
3.1 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 expression
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import (
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"fmt"
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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/core"
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"github.com/dolthub/doltgresql/core/id"
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pgtypes "github.com/dolthub/doltgresql/server/types"
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)
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// TableToComposite is a set of sql.Expressions wrapped together in a single value.
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type TableToComposite struct {
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fields []sql.Expression
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typ *pgtypes.DoltgresType
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}
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var _ sql.Expression = (*TableToComposite)(nil)
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// NewTableToComposite creates a new composite table type.
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func NewTableToComposite(ctx *sql.Context, tableName string, fields []sql.Expression) (sql.Expression, error) {
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coll, err := core.GetTypesCollectionFromContext(ctx, "")
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if err != nil {
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return nil, err
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}
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// TODO: we need to get the schema, but the GMS builder doesn't have that information
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typ, err := coll.GetType(ctx, id.NewType("", tableName))
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if err != nil {
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return nil, err
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}
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if typ == nil {
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return nil, errors.New(fmt.Sprintf(`could not create a composite type for table "%s"`, tableName))
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}
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return &TableToComposite{
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fields: fields,
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typ: typ,
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}, nil
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}
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// Resolved implements the sql.Expression interface.
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func (t *TableToComposite) Resolved() bool {
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for _, expr := range t.fields {
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if !expr.Resolved() {
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return false
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}
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}
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return true
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}
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// String implements the sql.Expression interface.
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func (t *TableToComposite) String() string {
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return "TABLE TO COMPOSITE"
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}
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// Type implements the sql.Expression interface.
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func (t *TableToComposite) Type(ctx *sql.Context) sql.Type {
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return t.typ
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}
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// IsNullable implements the sql.Expression interface.
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func (t *TableToComposite) IsNullable(ctx *sql.Context) bool {
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return false
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}
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// Eval implements the sql.Expression interface.
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func (t *TableToComposite) Eval(ctx *sql.Context, row sql.Row) (interface{}, error) {
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vals := make([]pgtypes.RecordValue, len(t.fields))
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for i, expr := range t.fields {
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val, err := expr.Eval(ctx, row)
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if err != nil {
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return nil, err
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}
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typ, ok := expr.Type(ctx).(*pgtypes.DoltgresType)
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if !ok {
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return nil, fmt.Errorf("expected a DoltgresType, but got %T", expr.Type(ctx))
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}
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vals[i] = pgtypes.RecordValue{
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Value: val,
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Type: typ,
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}
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}
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return vals, nil
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}
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// Children implements the sql.Expression interface.
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func (t *TableToComposite) Children() []sql.Expression {
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return t.fields
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}
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// WithChildren implements the sql.Expression interface.
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func (t *TableToComposite) WithChildren(ctx *sql.Context, children ...sql.Expression) (sql.Expression, error) {
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tCopy := *t
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tCopy.fields = children
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return &tCopy, nil
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}
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