本文整理匯總了Golang中github.com/concourse/atc/db.Conn.QueryRow方法的典型用法代碼示例。如果您正苦於以下問題：Golang Conn.QueryRow方法的具體用法？Golang Conn.QueryRow怎麽用？Golang Conn.QueryRow使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類github.com/concourse/atc/db.Conn的用法示例。
在下文中一共展示了Conn.QueryRow方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。
示例1:
Expect(err).To(MatchError("disaster"))
})
Describe("query counting", func() {
It("increments the global (;_;) counter", func() {
_, err := countingConn.Query("SELECT $1::int", 1)
Expect(err).NotTo(HaveOccurred())
Expect(metric.DatabaseQueries.Max()).To(Equal(1))
_, err = countingConn.Exec("SELECT $1::int", 1)
Expect(err).NotTo(HaveOccurred())
Expect(metric.DatabaseQueries.Max()).To(Equal(2))
countingConn.QueryRow("SELECT $1::int", 1)
Expect(metric.DatabaseQueries.Max()).To(Equal(3))
By("working in transactions")
underlyingTx := &fakes.FakeTx{}
underlyingConn.BeginReturns(underlyingTx, nil)
tx, err := countingConn.Begin()
Expect(err).NotTo(HaveOccurred())
_, err = tx.Query("SELECT $1::int", 1)
Expect(err).NotTo(HaveOccurred())
Expect(metric.DatabaseQueries.Max()).To(Equal(4))
})示例2:
rows, err := explainConn.Query("SELECT $1::int", 1)
Ω(err).ShouldNot(HaveOccurred())
err = rows.Close()
Ω(err).ShouldNot(HaveOccurred())
Expect(logger).To(gbytes.Say("Result"))
Expect(logger).To(gbytes.Say("cost="))
Expect(logger).To(gbytes.Say("SELECT"))
})
})
Describe("QueryRow()", func() {
It("EXPLAINs the query", func() {
var i int
err := explainConn.QueryRow("SELECT $1::int", 1).Scan(&i)
Ω(err).ShouldNot(HaveOccurred())
Ω(underlyingConn.QueryRowCallCount()).Should(Equal(1))
Ω(underlyingConn.QueryCallCount()).Should(Equal(1))
query, args := underlyingConn.QueryRowArgsForCall(0)
Ω(query).Should(Equal("SELECT $1::int"))
Ω(args).Should(Equal(varargs(1)))
query, args = underlyingConn.QueryArgsForCall(0)
Ω(query).Should(Equal("EXPLAIN SELECT $1::int"))
Ω(args).Should(Equal(varargs(1)))
})
It("logs the output of the explain", func() {