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expr_filter.go
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/
expr_filter.go
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// Copyright 2016 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
package sqlbase
import "github.com/cockroachdb/cockroach/pkg/sql/parser"
// RunFilter runs a filter expression and returns whether the filter passes.
func RunFilter(filter parser.TypedExpr, evalCtx *parser.EvalContext) (bool, error) {
if filter == nil {
return true, nil
}
d, err := filter.Eval(evalCtx)
if err != nil {
return false, err
}
return d == parser.DBoolTrue, nil
}