50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
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/*
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Copyright 2014 SAP SE
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package driver
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import (
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"crypto/rand"
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"fmt"
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"io"
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"regexp"
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"strconv"
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)
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var reSimple = regexp.MustCompile("^[_A-Z][_#$A-Z0-9]*$")
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// Identifier in hdb SQL statements like schema or table name.
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type Identifier string
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// RandomIdentifier returns a random Identifier prefixed by the prefix parameter.
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// This function is used to generate database objects with random names for test and example code.
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func RandomIdentifier(prefix string) Identifier {
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b := make([]byte, 16)
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if _, err := io.ReadFull(rand.Reader, b); err != nil {
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panic(err.Error()) // rand should never fail
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}
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return Identifier(fmt.Sprintf("%s%x", prefix, b))
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}
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// String implements Stringer interface.
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func (i Identifier) String() string {
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s := string(i)
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if reSimple.MatchString(s) {
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return s
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}
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return strconv.Quote(s)
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}
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