-
Notifications
You must be signed in to change notification settings - Fork 0
/
query.go
119 lines (94 loc) · 2.53 KB
/
query.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
package dbutil
// GetIDList - Given a query that selects ids, return an array of those ids
import (
"database/sql"
"fmt"
"strconv"
"strings"
"github.com/pkg/errors"
)
func Connect(dbName string, dbUser string, dbPassword string, dbHost string, dbPort int) (*sql.DB, error) {
psqlInfo := fmt.Sprintf("host=%s port=%d user=%s "+
"password=%s dbname=%s sslmode=disable",
dbHost, dbPort, dbUser, dbPassword, dbName)
db, err := sql.Open("postgres", psqlInfo)
if err != nil {
return nil, errors.Wrap(err, "error opening connecting to database")
}
err = db.Ping()
if err != nil {
return nil, errors.Wrap(err, "error pinging database")
}
return db, nil
}
func GetIDList(tx *sql.Tx, query string, args ...interface{}) ([]int, error) {
rows, err := tx.Query(query, args...)
if err != nil {
return nil, errors.Wrap(err, "query failed")
}
var ids []int
for rows.Next() {
var id int
err := rows.Scan(&id)
if err != nil {
rows.Close()
return nil, errors.Wrap(err, "error scanning row")
}
ids = append(ids, id)
}
if err := rows.Err(); err != nil {
return nil, errors.Wrap(err, "error iterating over rows")
}
return ids, nil
}
func GetID(tx *sql.Tx, query string, args ...interface{}) (int, error) {
var id int
row := tx.QueryRow(query, args...)
err := row.Scan(&id)
if err != nil {
if err == sql.ErrNoRows {
return 0, err
}
return 0, errors.Wrap(err, "unable to get id")
}
return id, nil
}
func GetUUIDList(tx *sql.Tx, query string, args ...interface{}) ([]string, error) {
rows, err := tx.Query(query, args...)
if err != nil {
return nil, errors.Wrap(err, "query failed")
}
var uuids []string
for rows.Next() {
var uuid string
err := rows.Scan(&uuid)
if err != nil {
rows.Close()
return nil, errors.Wrap(err, "error scanning row")
}
uuids = append(uuids, uuid)
}
if err := rows.Err(); err != nil {
return nil, errors.Wrap(err, "error iterating over rows")
}
return uuids, nil
}
func GetUUID(tx *sql.Tx, query string, args ...interface{}) (string, error) {
var uuid string
row := tx.QueryRow(query, args...)
err := row.Scan(&uuid)
if err != nil {
if err == sql.ErrNoRows {
return "", err
}
return "", errors.Wrap(err, "unable to get uuid")
}
return uuid, nil
}
func FormatQuery(query string) string {
numParams := strings.Count(query, "?")
for i := 1; i <= numParams; i++ {
query = strings.Replace(query, "?", "$"+strconv.Itoa(i), 1)
}
return query
}