2
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Merge branch 'master' into add-null-oid

This commit is contained in:
Manni Wood
2016-09-25 09:48:28 -04:00
4 changed files with 95 additions and 56 deletions
+7 -2
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@@ -1,8 +1,8 @@
language: go
go:
- 1.6.2
- 1.5.2
- 1.7.1
- 1.6.3
- tip
# Derived from https://github.com/lib/pq/blob/master/.travis.yml
@@ -37,6 +37,11 @@ before_script:
- psql -U postgres -c "create user pgx_md5 SUPERUSER PASSWORD 'secret'"
- psql -U postgres -c "create user pgx_pw SUPERUSER PASSWORD 'secret'"
install:
- go get -u github.com/shopspring/decimal
- go get -u gopkg.in/inconshreveable/log15.v2
- go get -u github.com/jackc/fake
script:
- go test -v -race -short ./...
+3 -3
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@@ -366,12 +366,12 @@ func TestPoolAcquireAndReleaseCycleAutoConnect(t *testing.T) {
if err != nil {
t.Fatalf("Unable to Acquire: %v", err)
}
rows, _ := c.Query("select 1")
rows, _ := c.Query("select 1, pg_sleep(0.02)")
rows.Close()
pool.Release(c)
}
for i := 0; i < 1000; i++ {
for i := 0; i < 10; i++ {
doSomething()
}
@@ -381,7 +381,7 @@ func TestPoolAcquireAndReleaseCycleAutoConnect(t *testing.T) {
}
var wg sync.WaitGroup
for i := 0; i < 1000; i++ {
for i := 0; i < 10; i++ {
wg.Add(1)
go func() {
defer wg.Done()
+84 -50
View File
@@ -81,63 +81,39 @@ releasing connections when you do not need that level of control.
return err
}
Transactions
Base Type Mapping
Transactions are started by calling Begin or BeginIso. The BeginIso variant
creates a transaction with a specified isolation level.
pgx maps between all common base types directly between Go and PostgreSQL. In
particular:
tx, err := conn.Begin()
if err != nil {
return err
}
// Rollback is safe to call even if the tx is already closed, so if
// the tx commits successfully, this is a no-op
defer tx.Rollback()
Go PostgreSQL
-----------------------
string varchar
text
_, err = tx.Exec("insert into foo(id) values (1)")
if err != nil {
return err
}
// Integers are automatically be converted to any other integer type if
// it can be done without overflow or underflow.
int8
int16 smallint
int32 int
int64 bigint
int
uint8
uint16
uint32
uint64
uint
err = tx.Commit()
if err != nil {
return err
}
// Floats are strict and do not automatically convert like integers.
float32 float4
float64 float8
Copy Protocol
time.Time date
timestamp
timestamptz
Use CopyTo to efficiently insert multiple rows at a time using the PostgreSQL
copy protocol. CopyTo accepts a CopyToSource interface. If the data is already
in a [][]interface{} use CopyToRows to wrap it in a CopyToSource interface. Or
implement CopyToSource to avoid buffering the entire data set in memory.
[]byte bytea
rows := [][]interface{}{
{"John", "Smith", int32(36)},
{"Jane", "Doe", int32(29)},
}
copyCount, err := conn.CopyTo(
"people",
[]string{"first_name", "last_name", "age"},
pgx.CopyToRows(rows),
)
CopyTo can be faster than an insert with as few as 5 rows.
Listen and Notify
pgx can listen to the PostgreSQL notification system with the
WaitForNotification function. It takes a maximum time to wait for a
notification.
err := conn.Listen("channelname")
if err != nil {
return nil
}
if notification, err := conn.WaitForNotification(time.Second); err != nil {
// do something with notification
}
Null Mapping
@@ -212,6 +188,64 @@ the raw bytes returned by PostgreSQL. This can be especially useful for reading
varchar, text, json, and jsonb values directly into a []byte and avoiding the
type conversion from string.
Transactions
Transactions are started by calling Begin or BeginIso. The BeginIso variant
creates a transaction with a specified isolation level.
tx, err := conn.Begin()
if err != nil {
return err
}
// Rollback is safe to call even if the tx is already closed, so if
// the tx commits successfully, this is a no-op
defer tx.Rollback()
_, err = tx.Exec("insert into foo(id) values (1)")
if err != nil {
return err
}
err = tx.Commit()
if err != nil {
return err
}
Copy Protocol
Use CopyTo to efficiently insert multiple rows at a time using the PostgreSQL
copy protocol. CopyTo accepts a CopyToSource interface. If the data is already
in a [][]interface{} use CopyToRows to wrap it in a CopyToSource interface. Or
implement CopyToSource to avoid buffering the entire data set in memory.
rows := [][]interface{}{
{"John", "Smith", int32(36)},
{"Jane", "Doe", int32(29)},
}
copyCount, err := conn.CopyTo(
"people",
[]string{"first_name", "last_name", "age"},
pgx.CopyToRows(rows),
)
CopyTo can be faster than an insert with as few as 5 rows.
Listen and Notify
pgx can listen to the PostgreSQL notification system with the
WaitForNotification function. It takes a maximum time to wait for a
notification.
err := conn.Listen("channelname")
if err != nil {
return nil
}
if notification, err := conn.WaitForNotification(time.Second); err != nil {
// do something with notification
}
TLS
The pgx ConnConfig struct has a TLSConfig field. If this field is
+1 -1
View File
@@ -1282,7 +1282,7 @@ func TestConnQueryDatabaseSQLDriverValuer(t *testing.T) {
}
var num decimal.Decimal
err = conn.QueryRow("select $1::decimal", expected).Scan(&num)
err = conn.QueryRow("select $1::decimal", &expected).Scan(&num)
if err != nil {
t.Fatalf("Scan failed: %v", err)
}