func WalkViewInBatches(result chan cb.ViewRow, errs chan errors.Error, stop chan bool, bucket *cb.Bucket,
ddoc string, view string, isPrimary bool, options map[string]interface{}, batchSize int64, limit int64) {
if limit != 0 && limit < batchSize {
batchSize = limit
}
defer close(result)
defer close(errs)
defer func() {
r := recover()
if r != nil {
logging.Errorf("View Walking Panic: %v\n%s", r, debug.Stack())
errs <- errors.NewCbViewsAccessError(nil, "Panic In walking view "+view)
}
}()
options["limit"] = batchSize + 1
numRead := int64(0)
numSent := int64(0)
keysSent := map[string]bool{}
ok := true
for ok {
logURL, err := bucket.ViewURL(ddoc, view, options)
if err == nil {
logging.Debugf("Request View: %v", logURL)
}
vres, err := bucket.View(ddoc, view, options)
if err != nil {
errs <- errors.NewCbViewsAccessError(err, "View name "+view)
return
}
for i, row := range vres.Rows {
// dont process the last row, its just used to see if we
// need to continue processing
if int64(i) < batchSize {
// Send the row if its primary key has not been sent
if isPrimary || !keysSent[row.ID] {
select {
case result <- row:
numSent += 1
case <-stop:
ok = false
break
}
}
// For non primary views, mark the row's primary key as sent
if !isPrimary {
keysSent[row.ID] = true
}
numRead += 1
}
}
if (int64(len(vres.Rows)) > batchSize) && (limit == 0 || (limit != 0 && numRead < limit)) {
// prepare for next run
skey := vres.Rows[batchSize].Key
skeydocid := vres.Rows[batchSize].ID
options["startkey"] = skey
options["startkey_docid"] = cb.DocID(skeydocid)
} else {
// stop
ok = false
}
}
logging.Debugf("WalkViewInBatches %s: %d rows fetched, %d rows sent", view, numRead, numSent)
}
"github.com/couchbase/query/datastore"
"github.com/couchbase/query/errors"
"github.com/couchbase/query/logging"
"github.com/couchbase/query/value"
)
const NETWORK_CHANNEL = "NETWORK"
const TYPE_NULL = 64
const TYPE_BOOLEAN = 96
const TYPE_NUMBER = 128
const TYPE_STRING = 160
const TYPE_ARRAY = 192
const TYPE_OBJECT = 224
var MIN_ID = cb.DocID("")
var MAX_ID = cb.DocID(strings.Repeat(string([]byte{0xff}), 251))
func ViewTotalRows(bucket *cb.Bucket, ddoc string, view string, options map[string]interface{}) (int64, errors.Error) {
options["limit"] = 0
logURL, err := bucket.ViewURL(ddoc, view, options)
if err == nil {
logging.Debugf("Request View: %v", logURL)
}
vres, err := bucket.View(ddoc, view, options)
if err != nil {
return 0, errors.NewCbViewsAccessError(err, "View Name"+view)
}
return int64(vres.TotalRows), nil