/
sql_util.go
64 lines (56 loc) · 1.45 KB
/
sql_util.go
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package main
import "database/sql"
func mustQueryAsString(db *sql.DB, query string, args ...any) ([]string, [][]string) {
heads, results, err := queryAsString(db, query, args...)
if err != nil {
panic(err)
}
return heads, results
}
func queryAsString(db *sql.DB, query string, args ...any) ([]string, [][]string, error) {
rows, err := db.Query(query, args...)
if err != nil {
return nil, nil, err
}
return convertSqlResults(rows)
}
func convertSqlResults(rows *sql.Rows) ([]string, [][]string, error) {
lines := make([][]string, 0)
columns, err := rows.Columns()
if err != nil {
return nil, nil, err
}
values := make([]sql.RawBytes, len(columns))
// rows.Scan wants '[]interface{}' as an argument, so we must copy the
// references into such a slice
// See http://code.google.com/p/go-wiki/wiki/InterfaceSlice for details
scanArgs := make([]interface{}, len(values))
for i := range values {
scanArgs[i] = &values[i]
}
for rows.Next() {
if err = rows.Scan(scanArgs...); err != nil {
return nil, nil, err
}
var value string
var line []string
for _, col := range values {
if col == nil {
value = "NULL"
} else {
value = string(col)
}
line = append(line, value)
}
lines = append(lines, line)
}
return columns, lines, nil
}
func mustConvertSqlResults(rows *sql.Rows) (columns []string, lines [][]string) {
var err error
columns, lines, err = convertSqlResults(rows)
if err != nil {
panic(err)
}
return
}