Examples with ScalarOperator com.facebook.presto.spi.function.ScalarOperator used on opensource projects

Example 21 with ScalarOperator

use of com.facebook.presto.spi.function.ScalarOperator in project presto by prestodb.

the class JsonOperators method castToBigint.

@ScalarOperator(CAST)
@SqlNullable
@SqlType(BIGINT)
public static Long castToBigint(@SqlType(JSON) Slice json) {
    try (JsonParser parser = createJsonParser(JSON_FACTORY, json)) {
        parser.nextToken();
        Long result = currentTokenAsBigint(parser);
        // check no trailing token
        checkCondition(parser.nextToken() == null, INVALID_CAST_ARGUMENT, "Cannot cast input json to BIGINT");
        return result;
    } catch (IOException | JsonCastException e) {
        throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to %s", json.toStringUtf8(), BIGINT), e);
    }
}

Example 22 with ScalarOperator

use of com.facebook.presto.spi.function.ScalarOperator in project presto by prestodb.

the class JsonOperators method castToSmallint.

@ScalarOperator(CAST)
@SqlNullable
@SqlType(SMALLINT)
public static Long castToSmallint(@SqlType(JSON) Slice json) {
    try (JsonParser parser = createJsonParser(JSON_FACTORY, json)) {
        parser.nextToken();
        Long result = currentTokenAsSmallint(parser);
        // check no trailing token
        checkCondition(parser.nextToken() == null, INVALID_CAST_ARGUMENT, "Cannot cast input json to SMALLINT");
        return result;
    } catch (PrestoException e) {
        if (e.getErrorCode().equals(NUMERIC_VALUE_OUT_OF_RANGE.toErrorCode())) {
            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to %s", json.toStringUtf8(), INTEGER), e.getCause());
        }
        throw e;
    } catch (IllegalArgumentException | IOException | JsonCastException e) {
        throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to %s", json.toStringUtf8(), SMALLINT), e);
    }
}

Example 23 with ScalarOperator

use of com.facebook.presto.spi.function.ScalarOperator in project presto by prestodb.

the class JsonOperators method castToDouble.

@ScalarOperator(CAST)
@SqlNullable
@SqlType(DOUBLE)
public static Double castToDouble(@SqlType(JSON) Slice json) {
    try (JsonParser parser = createJsonParser(JSON_FACTORY, json)) {
        parser.nextToken();
        Double result = currentTokenAsDouble(parser);
        // check no trailing token
        checkCondition(parser.nextToken() == null, INVALID_CAST_ARGUMENT, "Cannot cast input json to DOUBLE");
        return result;
    } catch (IOException | JsonCastException e) {
        throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to %s", json.toStringUtf8(), DOUBLE), e);
    }
}

Example 24 with ScalarOperator

use of com.facebook.presto.spi.function.ScalarOperator in project presto by prestodb.

the class TimestampWithTimeZoneOperators method castToDate.

@ScalarFunction("date")
@ScalarOperator(CAST)
@SqlType(StandardTypes.DATE)
public static long castToDate(@SqlType(StandardTypes.TIMESTAMP_WITH_TIME_ZONE) long value) {
    // round down the current timestamp to days
    ISOChronology chronology = unpackChronology(value);
    long date = chronology.dayOfYear().roundFloor(unpackMillisUtc(value));
    // date is currently midnight in timezone of the original value
    // convert to UTC
    long millis = date + chronology.getZone().getOffset(date);
    return TimeUnit.MILLISECONDS.toDays(millis);
}

Example 25 with ScalarOperator

use of com.facebook.presto.spi.function.ScalarOperator in project presto by prestodb.

the class IpAddressOperators method castFromVarcharToIpAddress.

@LiteralParameters("x")
@ScalarOperator(CAST)
@SqlType(StandardTypes.IPADDRESS)
public static Slice castFromVarcharToIpAddress(@SqlType("varchar(x)") Slice slice) {
    byte[] address;
    try {
        address = InetAddresses.forString(slice.toStringUtf8()).getAddress();
    } catch (IllegalArgumentException e) {
        throw new PrestoException(INVALID_CAST_ARGUMENT, "Cannot cast value to IPADDRESS: " + slice.toStringUtf8());
    }
    byte[] bytes;
    if (address.length == 4) {
        bytes = new byte[16];
        bytes[10] = (byte) 0xff;
        bytes[11] = (byte) 0xff;
        arraycopy(address, 0, bytes, 12, 4);
    } else if (address.length == 16) {
        bytes = address;
    } else {
        throw new PrestoException(GENERIC_INTERNAL_ERROR, "Invalid InetAddress length: " + address.length);
    }
    return wrappedBuffer(bytes);
}