Function combineFieldDescriptionsAndResultFormats

pgconn/pgconn.go:3015–3042

(outputFields, inputFields []FieldDescription, resultFormats []int16)

}

func combineFieldDescriptionsAndResultFormats(outputFields, inputFields []FieldDescription, resultFormats []int16) error {
	switch {
	case len(resultFormats) == 0:
		// No format codes provided means text format for all columns.
		for i := range inputFields {
			outputFields[i] = inputFields[i]
			outputFields[i].Format = pgtype.TextFormatCode
		}
	case len(resultFormats) == 1:
		// Single format code applies to all columns.
		format := resultFormats[0]
		for i := range inputFields {
			outputFields[i] = inputFields[i]
			outputFields[i].Format = format
		}
	case len(resultFormats) == len(inputFields):
		// One format code per column.
		for i := range inputFields {
			outputFields[i] = inputFields[i]
			outputFields[i].Format = resultFormats[i]
		}
	default:
		// This should not occur if Bind validation is correct, but handle gracefully
		return fmt.Errorf("result format codes length %d does not match field count %d", len(resultFormats), len(inputFields))
	}

	return nil
}