64 lines
2.1 KiB
Go
64 lines
2.1 KiB
Go
// Copyright 2024 PingCAP, 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 contextopt
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import (
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"context"
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exprctx "github.com/pingcap/tidb/pkg/expression/context"
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"github.com/pingcap/tidb/pkg/parser/ast"
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"github.com/pingcap/tidb/pkg/util/chunk"
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"github.com/pingcap/tidb/pkg/util/sqlexec"
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)
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// SQLExecutor provides a subset of methods in RestrictedSQLExecutor.
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var _ SQLExecutor = sqlexec.RestrictedSQLExecutor(nil)
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// SQLExecutor is the interface for SQL executing in expression.
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// We do not `sqlexec.SQLExecutor` to limit expression to use specified methods only.
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type SQLExecutor interface {
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ExecRestrictedSQL(
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ctx context.Context,
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opts []sqlexec.OptionFuncAlias,
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sql string,
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args ...any,
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) ([]chunk.Row, []*ast.ResultField, error)
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}
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// SQLExecutorPropProvider provides the SQLExecutor
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type SQLExecutorPropProvider func() (SQLExecutor, error)
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// Desc returns the description for the property key.
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func (SQLExecutorPropProvider) Desc() *exprctx.OptionalEvalPropDesc {
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return exprctx.OptPropSQLExecutor.Desc()
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}
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// SQLExecutorPropReader is used by expression to get sql executor
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type SQLExecutorPropReader struct{}
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// RequiredOptionalEvalProps implements the RequireOptionalEvalProps interface.
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func (SQLExecutorPropReader) RequiredOptionalEvalProps() exprctx.OptionalEvalPropKeySet {
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return exprctx.OptPropSQLExecutor.AsPropKeySet()
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}
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// GetSQLExecutor returns a SQLExecutor.
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func (SQLExecutorPropReader) GetSQLExecutor(ctx exprctx.EvalContext) (SQLExecutor, error) {
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p, err := getPropProvider[SQLExecutorPropProvider](ctx, exprctx.OptPropSQLExecutor)
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if err != nil {
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return nil, err
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}
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return p()
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}
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