wehub-resource-sync
106 lines
3.1 KiB
Go
106 lines
3.1 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 node
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import (
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"context"
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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/go-mysql-server/sql/plan"
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vitess "github.com/dolthub/vitess/go/vt/sqlparser"
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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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// DropCast implements DROP CAST.
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type DropCast struct {
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Source *pgtypes.DoltgresType
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Target *pgtypes.DoltgresType
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IfExists bool
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}
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var _ sql.ExecSourceRel = (*DropCast)(nil)
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var _ vitess.Injectable = (*DropCast)(nil)
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// NewDropCast returns a new *DropCast.
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func NewDropCast(source *pgtypes.DoltgresType, target *pgtypes.DoltgresType, ifExists bool) *DropCast {
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return &DropCast{
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Source: source,
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Target: target,
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IfExists: ifExists,
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}
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}
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// Children implements the interface sql.ExecSourceRel.
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func (c *DropCast) Children() []sql.Node {
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return nil
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}
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// IsReadOnly implements the interface sql.ExecSourceRel.
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func (c *DropCast) IsReadOnly() bool {
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return false
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}
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// Resolved implements the interface sql.ExecSourceRel.
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func (c *DropCast) Resolved() bool {
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return true
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}
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// RowIter implements the interface sql.ExecSourceRel.
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func (c *DropCast) RowIter(ctx *sql.Context, r sql.Row) (sql.RowIter, error) {
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castCollection, err := core.GetCastsCollectionFromContext(ctx, "")
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if err != nil {
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return nil, err
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}
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castID := id.NewCast(c.Source.ID, c.Target.ID)
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if !castCollection.HasCast(ctx, castID) {
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if c.IfExists {
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// TODO: send notice "cast from type SOURCE_NAME to type TARGET_NAME does not exist, skipping"
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return sql.RowsToRowIter(), nil
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}
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return nil, errors.Errorf("cast from type %s to type %s does not exist", c.Source.Name(), c.Target.Name())
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}
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if err = castCollection.DropCast(ctx, castID); err != nil {
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return nil, err
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}
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return sql.RowsToRowIter(), nil
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}
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// Schema implements the interface sql.ExecSourceRel.
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func (c *DropCast) Schema(ctx *sql.Context) sql.Schema {
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return nil
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}
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// String implements the interface sql.ExecSourceRel.
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func (c *DropCast) String() string {
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return "DROP CAST"
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}
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// WithChildren implements the interface sql.ExecSourceRel.
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func (c *DropCast) WithChildren(ctx *sql.Context, children ...sql.Node) (sql.Node, error) {
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return plan.NillaryWithChildren(c, children...)
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}
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// WithResolvedChildren implements the interface vitess.Injectable.
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func (c *DropCast) WithResolvedChildren(ctx context.Context, children []any) (any, error) {
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if len(children) != 0 {
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return nil, ErrVitessChildCount.New(0, len(children))
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}
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return c, nil
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}
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