public String visit()

in flink-doris-connector/src/main/java/org/apache/doris/flink/table/DorisExpressionVisitor.java [103:148]
34 lines of code
8 McCabe index (conditional complexity)

    public String visit(ValueLiteralExpression valueLiteral) {
        LogicalTypeRoot typeRoot = valueLiteral.getOutputDataType().getLogicalType().getTypeRoot();

        switch (typeRoot) {
            case TIMESTAMP_WITH_LOCAL_TIME_ZONE:
            case TIMESTAMP_WITH_TIME_ZONE:
            case DATE:
                return "'" + valueLiteral + "'";
            case TIMESTAMP_WITHOUT_TIME_ZONE:
                Class<?> conversionClass = valueLiteral.getOutputDataType().getConversionClass();
                if (LocalDateTime.class.isAssignableFrom(conversionClass)) {
                    try {
                        LocalDateTime localDateTime =
                                valueLiteral
                                        .getValueAs(LocalDateTime.class)
                                        .orElseThrow(
                                                () ->
                                                        new RuntimeException(
                                                                "Failed to get LocalDateTime value"));
                        int nano = localDateTime.getNano();
                        if (nano == 0) {
                            // if nanoseconds equals to zero, the timestamp is in seconds.
                            return wrapWithQuotes(localDateTime.format(dateTimeFormatter));
                        } else {
                            // 1. Even though the datetime precision in Doris is set to 3, the
                            // microseconds format such as "yyyy-MM-dd HH:mm:ss.SSSSSS" can still
                            // function properly in the Doris query plan.
                            // 2. If the timestamp is in nanoseconds, format it like 'yyyy-MM-dd
                            // HH:mm:ss.SSSSSS'. This will have no impact on the result. Because
                            // when parsing the imported DATETIME type data on the BE side (for
                            // example, through Stream load, Spark load, etc.), or when using the FE
                            // side with Nereids enabled, the decimals that exceed the current
                            // precision will be rounded.
                            return wrapWithQuotes(localDateTime.format(dateTimev2Formatter));
                        }

                    } catch (Exception e) {
                        throw new DorisRuntimeException(e.getMessage());
                    }
                }
                break;
            default:
                return valueLiteral.toString();
        }
        return valueLiteral.toString();
    }