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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
// Package postgres defines and registers usql's PostgreSQL driver.
//
// Alias: cockroachdb, CockroachDB
// Alias: redshift, Amazon Redshift
//
// See: https://github.com/lib/pq
// Group: base
package postgres
import (
"context"
"database/sql"
"errors"
"fmt"
"io"
"strings"
"github.com/lib/pq" // DRIVER
"github.com/xo/dburl"
"github.com/xo/usql/drivers"
"github.com/xo/usql/drivers/metadata"
pgmeta "github.com/xo/usql/drivers/metadata/postgres"
"github.com/xo/usql/env"
"github.com/xo/usql/text"
)
func init() {
openConn := func(stdout, stderr func() io.Writer, dsn string) (*sql.DB, error) {
conn, err := pq.NewConnector(dsn)
if err != nil {
return nil, err
}
noticeConn := pq.ConnectorWithNoticeHandler(conn, func(notice *pq.Error) {
out := stderr()
fmt.Fprintln(out, notice.Severity+": ", notice.Message)
if notice.Hint != "" {
fmt.Fprintln(out, "HINT: ", notice.Hint)
}
})
notificationConn := pq.ConnectorWithNotificationHandler(noticeConn, func(notification *pq.Notification) {
var payload string
if notification.Extra != "" {
payload = fmt.Sprintf(text.NotificationPayload, notification.Extra)
}
fmt.Fprintln(stdout(), fmt.Sprintf(text.NotificationReceived, notification.Channel, payload, notification.BePid))
})
return sql.OpenDB(notificationConn), nil
}
drivers.Register("postgres", drivers.Driver{
Name: "pq",
AllowDollar: true,
AllowMultilineComments: true,
LexerName: "postgres",
ForceParams: func(u *dburl.URL) {
if u.Scheme == "cockroachdb" {
drivers.ForceQueryParameters([]string{"sslmode", "disable"})(u)
}
},
Open: func(ctx context.Context, u *dburl.URL, stdout, stderr func() io.Writer) (func(string, string) (*sql.DB, error), error) {
return func(_, dsn string) (*sql.DB, error) {
conn, err := openConn(stdout, stderr, dsn)
if err != nil {
return nil, err
}
// special retry handling case, since there's no lib/pq retry mode
if env.Get("SSLMODE") == "retry" && !u.Query().Has("sslmode") {
switch err = conn.PingContext(ctx); {
case errors.Is(err, pq.ErrSSLNotSupported):
s := "sslmode=disable " + dsn
conn, err = openConn(stdout, stderr, s)
if err != nil {
return nil, err
}
u.DSN = s
case err != nil:
return nil, err
}
}
return conn, nil
}, nil
},
Version: func(ctx context.Context, db drivers.DB) (string, error) {
// numeric version
// SHOW server_version_num;
var ver string
err := db.QueryRowContext(ctx, `SHOW server_version`).Scan(&ver)
if err != nil {
return "", err
}
return "PostgreSQL " + ver, nil
},
ChangePassword: func(db drivers.DB, user, newpw, _ string) error {
_, err := db.Exec(`ALTER USER ` + user + ` PASSWORD '` + newpw + `'`)
return err
},
Err: func(err error) (string, string) {
if e, ok := err.(*pq.Error); ok {
return string(e.Code), e.Message
}
return "", err.Error()
},
IsPasswordErr: func(err error) bool {
if e, ok := err.(*pq.Error); ok {
return e.Code.Name() == "invalid_password"
}
return false
},
NewMetadataReader: pgmeta.NewReader(),
NewMetadataWriter: func(db drivers.DB, w io.Writer, opts ...metadata.ReaderOption) metadata.Writer {
return metadata.NewDefaultWriter(pgmeta.NewReader()(db, opts...))(db, w)
},
Copy: func(ctx context.Context, db *sql.DB, rows *sql.Rows, table string) (int64, error) {
columns, err := rows.Columns()
if err != nil {
return 0, fmt.Errorf("failed to fetch source rows columns: %w", err)
}
clen := len(columns)
query := table
if !strings.HasPrefix(strings.ToLower(query), "insert into") {
leftParen := strings.IndexRune(table, '(')
colQuery := "SELECT * FROM " + table + " WHERE 1=0"
if leftParen != -1 {
colQuery = "SELECT " + table[leftParen+1:len(table)-1] + " FROM " + table[:leftParen] + " WHERE 1=0"
table = table[:leftParen]
}
colStmt, err := db.PrepareContext(ctx, colQuery)
if err != nil {
return 0, fmt.Errorf("failed to prepare query to determine target table columns: %w", err)
}
defer colStmt.Close()
colRows, err := colStmt.QueryContext(ctx)
if err != nil {
return 0, fmt.Errorf("failed to execute query to determine target table columns: %w", err)
}
columns, err := colRows.Columns()
if err != nil {
return 0, fmt.Errorf("failed to fetch target table columns: %w", err)
}
if schemaSep := strings.Index(table, "."); schemaSep >= 0 {
query = pq.CopyInSchema(table[:schemaSep], table[schemaSep+1:], columns...)
} else {
query = pq.CopyIn(table, columns...)
}
}
tx, err := db.BeginTx(ctx, nil)
if err != nil {
return 0, fmt.Errorf("failed to begin transaction: %w", err)
}
stmt, err := tx.PrepareContext(ctx, query)
if err != nil {
return 0, fmt.Errorf("failed to prepare insert query: %w", err)
}
defer stmt.Close()
values := make([]interface{}, clen)
for i := 0; i < clen; i++ {
values[i] = new(interface{})
}
var n int64
for rows.Next() {
err = rows.Scan(values...)
if err != nil {
return n, fmt.Errorf("failed to scan row: %w", err)
}
_, err := stmt.ExecContext(ctx, values...)
if err != nil {
return n, fmt.Errorf("failed to exec copy: %w", err)
}
}
res, err := stmt.ExecContext(ctx)
if err != nil {
return n, fmt.Errorf("failed to final exec copy: %w", err)
}
rn, err := res.RowsAffected()
if err != nil {
return n, fmt.Errorf("failed to check rows affected: %w", err)
}
n += rn
err = tx.Commit()
if err != nil {
return n, fmt.Errorf("failed to commit transaction: %w", err)
}
return n, rows.Err()
},
}, "cockroachdb", "redshift")
}
|
