/
query.go
47 lines (43 loc) · 1.08 KB
/
query.go
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package txfeed
import (
"context"
//"database/sql"
// "fmt"
// "github.com/bytom/errors"
)
// Query queries the Chain Core for txfeeds matching the query.
func /* (t *Tracker)*/ Query(ctx context.Context, after string, limit int) ([]*TxFeed, string, error) {
/* const baseQ = `
SELECT id, alias, filter, after FROM txfeeds
WHERE ($1='' OR id < $1) ORDER BY id DESC LIMIT %d
`
rows, err := t.DB.QueryContext(ctx, fmt.Sprintf(baseQ, limit), after)
if err != nil {
return nil, "", errors.Wrap(err, "executing txfeeds query")
}
defer rows.Close()
txfeeds := make([]*TxFeed, 0, limit)
for rows.Next() {
var (
feed TxFeed
alias sql.NullString
)
err := rows.Scan(&feed.ID, &alias, &feed.Filter, &feed.After)
if err != nil {
return nil, "", errors.Wrap(err, "scanning txfeed row")
}
if alias.Valid {
feed.Alias = &alias.String
}
after = feed.ID
txfeeds = append(txfeeds, &feed)
}
err = rows.Err()
if err != nil {
return nil, "", errors.Wrap(err)
}
return txfeeds, after, nil
*/
after = "qwertyu"
return nil, after, nil
}