本文整理汇总了Golang中github.com/flynn/flynn/Godeps/_workspace/src/github.com/jackc/pgx.Conn.Query方法的典型用法代码示例。如果您正苦于以下问题：Golang Conn.Query方法的具体用法？Golang Conn.Query怎么用？Golang Conn.Query使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类github.com/flynn/flynn/Godeps/_workspace/src/github.com/jackc/pgx.Conn的用法示例。
在下文中一共展示了Conn.Query方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: ensureConnValid
// Do a simple query to ensure the connection is still usable
func ensureConnValid(t *testing.T, conn *pgx.Conn) {
var sum, rowCount int32
rows, err := conn.Query("select generate_series(1,$1)", 10)
if err != nil {
t.Fatalf("conn.Query failed: ", err)
}
defer rows.Close()
for rows.Next() {
var n int32
rows.Scan(&n)
sum += n
rowCount++
}
if rows.Err() != nil {
t.Fatalf("conn.Query failed: ", err)
}
if rowCount != 10 {
t.Error("Select called onDataRow wrong number of times")
}
if sum != 55 {
t.Error("Wrong values returned")
}
}示例2: TestPoolReleaseDiscardsDeadConnections
func TestPoolReleaseDiscardsDeadConnections(t *testing.T) {
t.Parallel()
maxConnections := 3
pool := createConnPool(t, maxConnections)
defer pool.Close()
var c1, c2 *pgx.Conn
var err error
var stat pgx.ConnPoolStat
if c1, err = pool.Acquire(); err != nil {
t.Fatalf("Unexpected error acquiring connection: %v", err)
}
defer func() {
if c1 != nil {
pool.Release(c1)
}
}()
if c2, err = pool.Acquire(); err != nil {
t.Fatalf("Unexpected error acquiring connection: %v", err)
}
defer func() {
if c2 != nil {
pool.Release(c2)
}
}()
if _, err = c2.Exec("select pg_terminate_backend($1)", c1.Pid); err != nil {
t.Fatalf("Unable to kill backend PostgreSQL process: %v", err)
}
// do something with the connection so it knows it's dead
rows, _ := c1.Query("select 1")
rows.Close()
if rows.Err() == nil {
t.Fatal("Expected error but none occurred")
}
if c1.IsAlive() {
t.Fatal("Expected connection to be dead but it wasn't")
}
stat = pool.Stat()
if stat.CurrentConnections != 2 {
t.Fatalf("Unexpected CurrentConnections: %v", stat.CurrentConnections)
}
if stat.AvailableConnections != 0 {
t.Fatalf("Unexpected AvailableConnections: %v", stat.CurrentConnections)
}
pool.Release(c1)
c1 = nil // so it doesn't get released again by the defer
stat = pool.Stat()
if stat.CurrentConnections != 1 {
t.Fatalf("Unexpected CurrentConnections: %v", stat.CurrentConnections)
}
if stat.AvailableConnections != 0 {
t.Fatalf("Unexpected AvailableConnections: %v", stat.CurrentConnections)
}
}