public static DataType toDataType()

in paimon-flink/paimon-flink-cdc/src/main/java/org/apache/paimon/flink/action/cdc/postgres/PostgresTypeUtils.java [74:173]
98 lines of code
47 McCabe index (conditional complexity)

    public static DataType toDataType(
            String typeName,
            @Nullable Integer precision,
            @Nullable Integer scale,
            TypeMapping typeMapping) {
        if (typeMapping.containsMode(TO_STRING)) {
            return DataTypes.STRING();
        }
        precision = precision == null ? 0 : precision;
        scale = scale == null ? 0 : scale;
        switch (typeName.toLowerCase()) {
            case PG_BIT:
            case PG_VARBIT:
                if (precision <= 1) {
                    return DataTypes.BOOLEAN();
                } else {
                    int length =
                            precision == Integer.MAX_VALUE ? precision / 8 : (precision + 7) / 8;
                    return DataTypes.BINARY(length);
                }
            case PG_BOOLEAN:
                return DataTypes.BOOLEAN();
            case PG_BOOLEAN_ARRAY:
                return DataTypes.ARRAY(DataTypes.BOOLEAN());
            case PG_BYTEA:
                return DataTypes.BYTES();
            case PG_BYTEA_ARRAY:
                return DataTypes.ARRAY(DataTypes.BYTES());
            case PG_SMALLINT:
            case PG_SMALLSERIAL:
                return DataTypes.SMALLINT();
            case PG_SMALLINT_ARRAY:
                return DataTypes.ARRAY(DataTypes.SMALLINT());
            case PG_INTEGER:
            case PG_SERIAL:
                return DataTypes.INT();
            case PG_INTEGER_ARRAY:
                return DataTypes.ARRAY(DataTypes.INT());
            case PG_BIGINT:
            case PG_BIGSERIAL:
                return DataTypes.BIGINT();
            case PG_BIGINT_ARRAY:
                return DataTypes.ARRAY(DataTypes.BIGINT());
            case PG_REAL:
                return DataTypes.FLOAT();
            case PG_REAL_ARRAY:
                return DataTypes.ARRAY(DataTypes.FLOAT());
            case PG_DOUBLE_PRECISION:
                return DataTypes.DOUBLE();
            case PG_DOUBLE_PRECISION_ARRAY:
                return DataTypes.ARRAY(DataTypes.DOUBLE());
            case PG_NUMERIC:
                // see SPARK-26538: handle numeric without explicit precision and scale.
                if (precision > 0) {
                    return DataTypes.DECIMAL(precision, scale);
                }
                return DataTypes.DECIMAL(DecimalType.MAX_PRECISION, 18);
            case PG_NUMERIC_ARRAY:
                // see SPARK-26538: handle numeric without explicit precision and scale.
                if (precision > 0) {
                    return DataTypes.ARRAY(DataTypes.DECIMAL(precision, scale));
                }
                return DataTypes.ARRAY(DataTypes.DECIMAL(DecimalType.MAX_PRECISION, 18));
            case PG_CHAR:
            case PG_CHARACTER:
                return DataTypes.CHAR(precision);
            case PG_CHAR_ARRAY:
            case PG_CHARACTER_ARRAY:
                return DataTypes.ARRAY(DataTypes.CHAR(precision));
            case PG_CHARACTER_VARYING:
                return DataTypes.VARCHAR(precision);
            case PG_CHARACTER_VARYING_ARRAY:
                return DataTypes.ARRAY(DataTypes.VARCHAR(precision));
            case PG_TEXT:
            case PG_JSON:
            case PG_ENUM:
                return DataTypes.STRING();
            case PG_TEXT_ARRAY:
                return DataTypes.ARRAY(DataTypes.STRING());
            case PG_TIMESTAMP:
                return DataTypes.TIMESTAMP(scale);
            case PG_TIMESTAMP_ARRAY:
                return DataTypes.ARRAY(DataTypes.TIMESTAMP(scale));
            case PG_TIMESTAMPTZ:
                return DataTypes.TIMESTAMP_WITH_LOCAL_TIME_ZONE(scale);
            case PG_TIMESTAMPTZ_ARRAY:
                return DataTypes.ARRAY(DataTypes.TIMESTAMP_WITH_LOCAL_TIME_ZONE(scale));
            case PG_TIME:
                return DataTypes.TIME(scale);
            case PG_TIME_ARRAY:
                return DataTypes.ARRAY(DataTypes.TIME(scale));
            case PG_DATE:
                return DataTypes.DATE();
            case PG_DATE_ARRAY:
                return DataTypes.ARRAY(DataTypes.DATE());
            default:
                throw new UnsupportedOperationException(
                        String.format("Doesn't support Postgres type '%s' yet", typeName));
        }
    }