wehub-resource-sync
137 lines
3.8 KiB
Go
137 lines
3.8 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 ast
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import (
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"github.com/cockroachdb/errors"
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vitess "github.com/dolthub/vitess/go/vt/sqlparser"
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"github.com/dolthub/doltgresql/postgres/parser/sem/tree"
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)
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// nodeCheckConstraintTableDef converts a tree.CheckConstraintTableDef instance
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// into a vitess.DDL instance that can be executed by GMS. |tableName| identifies
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// the table being altered, and |ifExists| indicates whether the IF EXISTS clause
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// was specified. |notValid| reflects whether the NOT VALID clause was present.
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func nodeCheckConstraintTableDef(
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ctx *Context,
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node *tree.CheckConstraintTableDef,
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tableName vitess.TableName,
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ifExists bool,
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notValid bool) (*vitess.DDL, error) {
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if node.NoInherit {
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return nil, errors.Errorf("NO INHERIT is not yet supported for check constraints")
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}
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expr, err := nodeExpr(ctx, node.Expr)
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if err != nil {
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return nil, err
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}
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return &vitess.DDL{
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Action: "alter",
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Table: tableName,
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IfExists: ifExists,
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ConstraintAction: "add",
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TableSpec: &vitess.TableSpec{
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Constraints: []*vitess.ConstraintDefinition{
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{
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Name: node.Name.String(),
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Details: &vitess.CheckConstraintDefinition{
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Expr: expr,
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Enforced: true,
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NotValid: notValid,
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},
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},
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},
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},
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}, nil
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}
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// nodeAlterTableDropConstraint converts a tree.AlterTableDropConstraint instance
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// into a vitess.DDL instance that can be executed by GMS. |tableName| identifies
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// the table being altered, and |ifExists| indicates whether the IF EXISTS clause
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// was specified.
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func nodeAlterTableDropConstraint(
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ctx *Context,
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node *tree.AlterTableDropConstraint,
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tableName vitess.TableName,
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ifExists bool) (*vitess.DDL, error) {
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if node.DropBehavior == tree.DropCascade {
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return nil, errors.Errorf("CASCADE is not yet supported for drop constraint")
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}
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return &vitess.DDL{
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Action: "alter",
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Table: tableName,
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IfExists: ifExists,
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ConstraintAction: "drop",
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ConstraintIfExists: node.IfExists,
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TableSpec: &vitess.TableSpec{
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Constraints: []*vitess.ConstraintDefinition{
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{Name: node.Constraint.String()},
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},
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},
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}, nil
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}
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// nodeUniqueConstraintTableDef converts a tree.UniqueConstraintTableDef instance
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// into a vitess.DDL instance that can be executed by GMS. |tableName| identifies
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// the table being altered, and |ifExists| indicates whether the IF EXISTS clause
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// was specified.
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func nodeUniqueConstraintTableDef(
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ctx *Context,
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node *tree.UniqueConstraintTableDef,
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tableName vitess.TableName,
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ifExists bool) (*vitess.DDL, error) {
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if len(node.IndexParams.StorageParams) > 0 {
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return nil, errors.Errorf("STORAGE parameters not yet supported for indexes")
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}
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if node.IndexParams.Tablespace != "" {
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return nil, errors.Errorf("TABLESPACE is not yet supported")
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}
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if node.NullsNotDistinct {
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return nil, errors.Errorf("NULLS NOT DISTINCT is not yet supported")
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}
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indexFields, err := nodeIndexElemList(ctx, node.Columns)
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if err != nil {
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return nil, err
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}
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indexType := "unique"
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if node.PrimaryKey {
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indexType = "primary"
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}
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return &vitess.DDL{
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Action: "alter",
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Table: tableName,
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IfExists: ifExists,
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IndexSpec: &vitess.IndexSpec{
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ToName: vitess.NewColIdent(bareIdentifier(node.Name)),
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Action: "create",
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Type: indexType,
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Fields: indexFields,
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},
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}, nil
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}
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