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58 lines
1.8 KiB
58 lines
1.8 KiB
// Copyright 2015 clair authors
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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 util
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import (
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"fmt"
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"strings"
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"github.com/lib/pq"
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)
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func QueryInsert(count int, table string, columns ...string) string {
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base := `INSERT INTO %s (%s) VALUES %s`
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t := pq.QuoteIdentifier(table)
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cols := make([]string, len(columns))
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for i, c := range columns {
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cols[i] = pq.QuoteIdentifier(c)
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}
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colsQuoted := strings.Join(cols, ",")
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return fmt.Sprintf(base, t, colsQuoted, QueryString(len(columns), count))
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}
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func QueryPersist(count int, table, constraint string, columns ...string) string {
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ct := ""
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if constraint != "" {
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ct = fmt.Sprintf("ON CONSTRAINT %s", constraint)
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}
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return fmt.Sprintf("%s ON CONFLICT %s DO NOTHING", QueryInsert(count, table, columns...), ct)
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}
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// size of key and array should be both greater than 0
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func QueryString(keySize, arraySize int) string {
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if arraySize <= 0 || keySize <= 0 {
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panic("Bulk Query requires size of element tuple and number of elements to be greater than 0")
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}
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keys := make([]string, 0, arraySize)
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for i := 0; i < arraySize; i++ {
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key := make([]string, keySize)
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for j := 0; j < keySize; j++ {
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key[j] = fmt.Sprintf("$%d", i*keySize+j+1)
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}
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keys = append(keys, fmt.Sprintf("(%s)", strings.Join(key, ",")))
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}
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return strings.Join(keys, ",")
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}
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