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helper.go
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/
helper.go
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package main
import (
"database/sql"
"log"
"strings"
)
func printColumns(rows *sql.Rows) {
col, err := rows.Columns()
onError(err)
var sb strings.Builder
sb.WriteString("|")
for _, s := range col {
sb.WriteString(s)
sb.WriteString("|")
}
log.Println(sb.String())
}
func printRows(rows *sql.Rows) {
cols, _ := rows.Columns()
for rows.Next() {
columns := make([]string, len(cols))
columnPointers := make([]interface{}, len(cols))
for i := range columns {
columnPointers[i] = &columns[i]
}
err := rows.Scan(columnPointers...)
if err != nil {
panic(err)
}
var sb strings.Builder
sb.WriteString("|")
for _, s := range columnPointers {
sb.WriteString(*s.(*string))
sb.WriteString("|")
}
log.Println(sb.String())
}
}
func onError(err error) {
if err != nil {
log.Printf("Error %s", err)
panic(err)
}
}