本文整理汇总了Golang中github.com/BurntSushi/migration.LimitedTx.QueryRow方法的典型用法代码示例。如果您正苦于以下问题：Golang LimitedTx.QueryRow方法的具体用法？Golang LimitedTx.QueryRow怎么用？Golang LimitedTx.QueryRow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/BurntSushi/migration.LimitedTx的用法示例。
在下文中一共展示了LimitedTx.QueryRow方法的6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: getVersion
// getVersion gets the migration version in the database.
func getVersion(tx migration.LimitedTx) (int, error) {
var version int
row := tx.QueryRow("SELECT version FROM migration_version")
if err := row.Scan(&version); err != nil {
return 0, err
}
return version, nil
}示例2: get
func (d dbVersion) get(tx migration.LimitedTx) (int, error) {
var version int
r := tx.QueryRow(d.GetSQL)
if err := r.Scan(&version); err != nil {
return 0, err
}
return version, nil
}示例3: CreateEventIDSequencesForInFlightBuilds
func CreateEventIDSequencesForInFlightBuilds(tx migration.LimitedTx) error {
cursor := 0
for {
var id, eventIDStart int
err := tx.QueryRow(`
SELECT id, max(event_id)
FROM builds
LEFT JOIN build_events
ON build_id = id
WHERE id > $1
AND status = 'started'
GROUP BY id
ORDER BY id ASC
LIMIT 1
`, cursor).Scan(&id, &eventIDStart)
if err != nil {
if err == sql.ErrNoRows {
break
}
return err
}
cursor = id
_, err = tx.Exec(fmt.Sprintf(`
CREATE SEQUENCE %s MINVALUE 0 START WITH %d
`, buildEventSeq(id), eventIDStart+1))
if err != nil {
return err
}
}
return nil
}示例4: AddBuildEvents
func AddBuildEvents(tx migration.LimitedTx) error {
_, err := tx.Exec(`
CREATE TABLE build_events (
id serial PRIMARY KEY,
build_id integer REFERENCES builds (id),
type varchar(32) NOT NULL,
payload text NOT NULL
)
`)
if err != nil {
return err
}
cursor := 0
for {
var id int
var buildLog sql.NullString
err := tx.QueryRow(`
SELECT id, log
FROM builds
WHERE id > $1
ORDER BY id ASC
LIMIT 1
`, cursor).Scan(&id, &buildLog)
if err != nil {
if err == sql.ErrNoRows {
break
}
return err
}
cursor = id
if !buildLog.Valid {
continue
}
logBuf := bytes.NewBufferString(buildLog.String)
decoder := json.NewDecoder(logBuf)
for {
var entry logEntry
err := decoder.Decode(&entry)
if err != nil {
if err != io.EOF {
// non-JSON log; assume v0.0
_, err = tx.Exec(`
INSERT INTO build_events (build_id, type, payload)
VALUES ($1, $2, $3)
`, id, "version", "0.0")
if err != nil {
return err
}
_, err = tx.Exec(`
INSERT INTO build_events (build_id, type, payload)
VALUES ($1, $2, $3)
`, id, "log", buildLog.String)
if err != nil {
return err
}
}
break
}
if entry.Type != "" && entry.EventPayload != nil {
_, err = tx.Exec(`
INSERT INTO build_events (build_id, type, payload)
VALUES ($1, $2, $3)
`, id, entry.Type, []byte(*entry.EventPayload))
if err != nil {
return err
}
continue
}
if entry.Version != "" {
versionEnc, err := json.Marshal(entry.Version)
if err != nil {
return err
}
_, err = tx.Exec(`
INSERT INTO build_events (build_id, type, payload)
VALUES ($1, $2, $3)
`, id, "version", versionEnc)
if err != nil {
return err
}
continue
}
//.........这里部分代码省略.........
示例5: AddEngineAndEngineMetadataToBuilds
func AddEngineAndEngineMetadataToBuilds(tx migration.LimitedTx) error {
_, err := tx.Exec(`ALTER TABLE builds ADD COLUMN engine varchar(16)`)
if err != nil {
return err
}
_, err = tx.Exec(`ALTER TABLE builds ADD COLUMN engine_metadata text`)
if err != nil {
return err
}
cursor := 0
for {
var id int
var guid, endpoint string
err := tx.QueryRow(`
SELECT id, guid, endpoint
FROM builds
WHERE id > $1
AND guid != ''
ORDER BY id ASC
LIMIT 1
`, cursor).Scan(&id, &guid, &endpoint)
if err != nil {
if err == sql.ErrNoRows {
break
}
return err
}
cursor = id
engineMetadata := turbineMetadata{
Guid: guid,
Endpoint: endpoint,
}
payload, err := json.Marshal(engineMetadata)
if err != nil {
continue
}
_, err = tx.Exec(`
UPDATE builds
SET engine = $1, engine_metadata = $2
WHERE id = $3
`, "turbine", payload, id)
if err != nil {
continue
}
}
_, err = tx.Exec(`ALTER TABLE builds DROP COLUMN guid`)
if err != nil {
return err
}
_, err = tx.Exec(`ALTER TABLE builds DROP COLUMN endpoint`)
if err != nil {
return err
}
return nil
}示例6: ReplaceBuildsAbortHijackURLsWithGuidAndEndpoint
func ReplaceBuildsAbortHijackURLsWithGuidAndEndpoint(tx migration.LimitedTx) error {
_, err := tx.Exec(`ALTER TABLE builds ADD COLUMN guid varchar(36)`)
if err != nil {
return err
}
_, err = tx.Exec(`ALTER TABLE builds ADD COLUMN endpoint varchar(128)`)
if err != nil {
return err
}
cursor := 0
for {
var id int
var abortURLStr sql.NullString
err := tx.QueryRow(`
SELECT id, abort_url
FROM builds
WHERE id > $1
LIMIT 1
`, cursor).Scan(&id, &abortURLStr)
if err != nil {
if err == sql.ErrNoRows {
break
}
return err
}
cursor = id
if !abortURLStr.Valid {
continue
}
// determine guid + endpoint from abort url
//
// format should be http://foo.com:5050/builds/some-guid/abort
//
// best-effort; skip if not possible, not a big deal
abortURL, err := url.Parse(abortURLStr.String)
if err != nil {
continue
}
pathSegments := strings.Split(abortURL.Path, "/")
if len(pathSegments) != 4 {
continue
}
guid := pathSegments[2]
endpoint := abortURL.Scheme + "://" + abortURL.Host
_, err = tx.Exec(`
UPDATE builds
SET guid = $1, endpoint = $2
WHERE id = $3
`, guid, endpoint, id)
if err != nil {
continue
}
}
_, err = tx.Exec(`ALTER TABLE builds DROP COLUMN abort_url`)
if err != nil {
return err
}
_, err = tx.Exec(`ALTER TABLE builds DROP COLUMN hijack_url`)
if err != nil {
return err
}
return nil
}