43 lines
1.4 KiB
Go
43 lines
1.4 KiB
Go
// Copyright 2017 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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package types
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// EvalType indicates the specified types that arguments and result of a built-in function should be.
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type EvalType byte
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const (
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// ETInt represents type INT in evaluation.
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ETInt EvalType = iota
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// ETReal represents type REAL in evaluation.
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ETReal
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// ETDecimal represents type DECIMAL in evaluation.
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ETDecimal
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// ETString represents type STRING in evaluation.
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ETString
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// ETDatetime represents type DATETIME in evaluation.
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ETDatetime
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// ETTimestamp represents type TIMESTAMP in evaluation.
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ETTimestamp
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// ETDuration represents type DURATION in evaluation.
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ETDuration
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// ETJson represents type JSON in evaluation.
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ETJson
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)
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// IsStringKind returns true for ETString, ETDatetime, ETTimestamp, ETDuration, ETJson EvalTypes.
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func (et EvalType) IsStringKind() bool {
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return et == ETString || et == ETDatetime ||
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et == ETTimestamp || et == ETDuration || et == ETJson
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}
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