Enum hdbconnect::HdbValue

pub enum HdbValue<'a> {
    NULL,
    TINYINT(u8),
    SMALLINT(i16),
    INT(i32),
    BIGINT(i64),
    DECIMAL(BigDecimal),
    REAL(f32),
    DOUBLE(f64),
    BINARY(Vec<u8>),
    SYNC_CLOB(CLob),
    SYNC_NCLOB(NCLob),
    SYNC_BLOB(BLob),
    SYNC_LOBSTREAM(Option<Arc<Mutex<dyn Read + Send>>>),
    BOOLEAN(bool),
    STRING(String),
    DBSTRING(Vec<u8>),
    STR(&'a str),
    LONGDATE(LongDate),
    SECONDDATE(SecondDate),
    DAYDATE(DayDate),
    SECONDTIME(SecondTime),
    GEOMETRY(Vec<u8>),
    POINT(Vec<u8>),
    ARRAY(Vec<HdbValue<'a>>),
}

Enum for all supported database value types.

Variants

NULL

Representation of a database NULL value.

TINYINT(u8)

Stores an 8-bit unsigned integer. The minimum value is 0. The maximum value is 255.

SMALLINT(i16)

Stores a 16-bit signed integer. The minimum value is -32,768. The maximum value is 32,767.

INT(i32)

Stores a 32-bit signed integer. The minimum value is -2,147,483,648. The maximum value is 2,147,483,647.

BIGINT(i64)

Stores a 64-bit signed integer. The minimum value is -9,223,372,036,854,775,808. The maximum value is 9,223,372,036,854,775,807.

DECIMAL(BigDecimal)

Representation for fixed-point decimal values.

REAL(f32)

Stores a single-precision 32-bit floating-point number.

DOUBLE(f64)

Stores a double-precision 64-bit floating-point number. The minimum value is -1.7976931348623157E308, the maximum value is 1.7976931348623157E308 . The smallest positive DOUBLE value is 2.2250738585072014E-308 and the largest negative DOUBLE value is -2.2250738585072014E-308.

BINARY(Vec<u8>)

Stores binary data.

SYNC_CLOB(CLob)

Stores a large ASCII character string.

SYNC_NCLOB(NCLob)

Stores a large Unicode string.

SYNC_BLOB(BLob)

Stores a large binary string.

SYNC_LOBSTREAM(Option<Arc<Mutex<dyn Read + Send>>>)

Used for streaming LOBs to the database (see PreparedStatement::execute_row()).

BOOLEAN(bool)

BOOLEAN stores boolean values, which are TRUE or FALSE.

STRING(String)

The DB returns all valid Strings as type STRING, independent of the concrete column type.

DBSTRING(Vec<u8>)

In rare cases, when the database sends invalid CESU-8, we fall back to this type.

STR(&'a str)

Can be used for avoiding cloning when sending large Strings to the database (see PreparedStatement::execute_row()).

LONGDATE(LongDate)

Timestamp with 10^-7 seconds precision, uses eight bytes.

SECONDDATE(SecondDate)

TIMESTAMP with second precision.

DAYDATE(DayDate)

DATE with day precision.

SECONDTIME(SecondTime)

TIME with second precision.

GEOMETRY(Vec<u8>)

Spatial type GEOMETRY.

POINT(Vec<u8>)

Spatial type POINT.

ARRAY(Vec<HdbValue<'a>>)

HANA’s array type

Implementations

impl<'a> HdbValue<'a>

pub fn is_null(&self) -> bool

Returns true if the value is a NULL value.

impl HdbValue<'static>

pub fn try_into<'x, T>(self) -> Result<T, HdbError>

where T: Deserialize<'x>,

Deserialize into a rust type.

Errors

HdbError::DeserializationError if the target type does not fit.

pub fn try_into_blob(self) -> Result<BLob, HdbError>

Convert into BLob.

Errors

HdbError::UsageDetailed if this is not a HdbValue::BLOB.

pub fn try_into_clob(self) -> Result<CLob, HdbError>

Convert into CLob.

Errors

HdbError::UsageDetailed if this is not a HdbValue::CLOB.

pub fn try_into_nclob(self) -> Result<NCLob, HdbError>

Convert into NCLob.

Errors

HdbError::UsageDetailed if this is not a HdbValue::NCLOB.

Trait Implementations

impl DbValue for HdbValue<'static>

fn is_null(&self) -> bool

Returns true if this is a NULL value.

fn try_into<'de, T>(self) -> Result<T, DeserializationError>

where T: Deserialize<'de>,

Converts the DbValue into a plain rust value.

impl DbValueInto<String> for HdbValue<'static>

fn try_into(self) -> Result<String, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<Vec<u8>> for HdbValue<'static>

fn try_into(self) -> Result<Vec<u8>, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<bool> for HdbValue<'static>

fn try_into(self) -> Result<bool, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<f32> for HdbValue<'static>

fn try_into(self) -> Result<f32, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<f64> for HdbValue<'static>

fn try_into(self) -> Result<f64, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<i16> for HdbValue<'static>

fn try_into(self) -> Result<i16, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<i32> for HdbValue<'static>

fn try_into(self) -> Result<i32, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<i64> for HdbValue<'static>

fn try_into(self) -> Result<i64, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<i8> for HdbValue<'static>

fn try_into(self) -> Result<i8, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<u16> for HdbValue<'static>

fn try_into(self) -> Result<u16, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<u32> for HdbValue<'static>

fn try_into(self) -> Result<u32, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<u64> for HdbValue<'static>

fn try_into(self) -> Result<u64, ConversionError>

Converts the database value into the target rust type.

impl DbValueInto<u8> for HdbValue<'static>

fn try_into(self) -> Result<u8, ConversionError>

Converts the database value into the target rust type.

impl<'a> Debug for HdbValue<'a>

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'a> Display for HdbValue<'a>

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'a> PartialEq<&str> for HdbValue<'a>

fn eq(&self, rhs: &&str) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> PartialEq<i32> for HdbValue<'a>

fn eq(&self, rhs: &i32) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.