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

Example 16 with SqlType

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

the class JsonFunctions method jsonArrayLength.

@SqlNullable
@ScalarFunction
@SqlType(StandardTypes.BIGINT)
public static Long jsonArrayLength(@SqlType(StandardTypes.JSON) Slice json) {
    try (JsonParser parser = createJsonParser(JSON_FACTORY, json)) {
        if (parser.nextToken() != START_ARRAY) {
            return null;
        }
        long length = 0;
        while (true) {
            JsonToken token = parser.nextToken();
            if (token == null) {
                return null;
            }
            if (token == END_ARRAY) {
                return length;
            }
            parser.skipChildren();
            length++;
        }
    } catch (IOException e) {
        return null;
    }
}

Example 17 with SqlType

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

the class JsonFunctions method jsonArrayContains.

@SqlNullable
@ScalarFunction
@SqlType(StandardTypes.BOOLEAN)
public static Boolean jsonArrayContains(@SqlType(StandardTypes.JSON) Slice json, @SqlType(StandardTypes.BIGINT) long value) {
    try (JsonParser parser = createJsonParser(JSON_FACTORY, json)) {
        if (parser.nextToken() != START_ARRAY) {
            return null;
        }
        while (true) {
            JsonToken token = parser.nextToken();
            if (token == null) {
                return null;
            }
            if (token == END_ARRAY) {
                return false;
            }
            parser.skipChildren();
            if ((token == VALUE_NUMBER_INT) && ((parser.getNumberType() == NumberType.INT) || (parser.getNumberType() == NumberType.LONG)) && (parser.getLongValue() == value)) {
                return true;
            }
        }
    } catch (IOException e) {
        return null;
    }
}

Example 18 with SqlType

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

the class JsonFunctions method jsonParse.

@ScalarFunction
@LiteralParameters("x")
@SqlType(StandardTypes.JSON)
public static Slice jsonParse(@SqlType("varchar(x)") Slice slice) {
    try {
        byte[] in = slice.getBytes();
        SliceOutput dynamicSliceOutput = new DynamicSliceOutput(in.length);
        SORTED_MAPPER.writeValue((OutputStream) dynamicSliceOutput, SORTED_MAPPER.readValue(in, Object.class));
        return dynamicSliceOutput.slice();
    } catch (Exception e) {
        throw new PrestoException(INVALID_FUNCTION_ARGUMENT, format("Cannot convert '%s' to JSON", slice.toStringUtf8()));
    }
}

Example 19 with SqlType

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

the class JsonFunctions method jsonArrayContains.

@SqlNullable
@ScalarFunction
@LiteralParameters("x")
@SqlType(StandardTypes.BOOLEAN)
public static Boolean jsonArrayContains(@SqlType(StandardTypes.JSON) Slice json, @SqlType("varchar(x)") Slice value) {
    String valueString = value.toStringUtf8();
    try (JsonParser parser = createJsonParser(JSON_FACTORY, json)) {
        if (parser.nextToken() != START_ARRAY) {
            return null;
        }
        while (true) {
            JsonToken token = parser.nextToken();
            if (token == null) {
                return null;
            }
            if (token == END_ARRAY) {
                return false;
            }
            parser.skipChildren();
            if (token == VALUE_STRING && valueString.equals(parser.getValueAsString())) {
                return true;
            }
        }
    } catch (IOException e) {
        return null;
    }
}

Example 20 with SqlType

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

the class JsonOperators method castToBoolean.

@ScalarOperator(CAST)
@SqlNullable
@SqlType(BOOLEAN)
public static Boolean castToBoolean(@SqlType(JSON) Slice json) {
    try (JsonParser parser = createJsonParser(JSON_FACTORY, json)) {
        parser.nextToken();
        Boolean result;
        switch(parser.getCurrentToken()) {
            case VALUE_NULL:
                result = null;
                break;
            case VALUE_STRING:
                result = VarcharOperators.castToBoolean(Slices.utf8Slice(parser.getText()));
                break;
            case VALUE_NUMBER_FLOAT:
                result = DoubleOperators.castToBoolean(parser.getDoubleValue());
                break;
            case VALUE_NUMBER_INT:
                result = BigintOperators.castToBoolean(parser.getLongValue());
                break;
            case VALUE_TRUE:
                result = true;
                break;
            case VALUE_FALSE:
                result = false;
                break;
            default:
                throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to %s", json.toStringUtf8(), BOOLEAN));
        }
        // check no trailing token
        checkCondition(parser.nextToken() == null, INVALID_CAST_ARGUMENT, "Cannot cast input json to BOOLEAN");
        return result;
    } catch (IOException e) {
        throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to %s", json.toStringUtf8(), BOOLEAN));
    }
}