Package com.clickhouse.client.data
Class ClickHouseEmptyValue
- java.lang.Object
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- com.clickhouse.client.data.ClickHouseEmptyValue
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- All Implemented Interfaces:
ClickHouseValue
,Serializable
public final class ClickHouseEmptyValue extends Object implements ClickHouseValue
Wrapper class of Nothing.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description static ClickHouseEmptyValue
INSTANCE
Singleton.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description BigDecimal
asBigDecimal(int scale)
Gets value asBigDecimal
.BigInteger
asBigInteger()
Gets value asBigInteger
.byte
asByte()
Gets value as byte.double
asDouble()
Gets value as double.float
asFloat()
Gets value as float.int
asInteger()
Gets value as integer.long
asLong()
Gets value as long.Object
asObject()
Gets value as an object.short
asShort()
Gets value as short.ClickHouseValue
copy(boolean deep)
Gets a copy of this value object.boolean
isNullOrEmpty()
Checks if the value is null, or empty for non-null types like Array, Tuple and Map.ClickHouseValue
resetToNullOrEmpty()
Resets value to null, or empty when null is not supported(e.g.String
toSqlExpression()
Converts the value to escaped SQL expression.String
toString()
ClickHouseValue
update(byte value)
Updates value.ClickHouseValue
update(double value)
Updates value.ClickHouseValue
update(float value)
Updates value.ClickHouseValue
update(int value)
Updates value.ClickHouseValue
update(long value)
Updates value.ClickHouseValue
update(short value)
Updates value.ClickHouseValue
update(ClickHouseValue value)
Updates value.ClickHouseValue
update(String value)
Updates value.ClickHouseValue
update(BigDecimal value)
Updates value.ClickHouseValue
update(BigInteger value)
Updates value.-
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface com.clickhouse.client.ClickHouseValue
asArray, asArray, asBigDecimal, asBinary, asBinary, asBinary, asBinary, asBoolean, asByteStream, asCharacter, asCharacterStream, asDate, asDateTime, asDateTime, asEnum, asInet4Address, asInet6Address, asInstant, asInstant, asMap, asMap, asObject, asOffsetDateTime, asOffsetDateTime, asString, asString, asString, asString, asTime, asTime, asTuple, asUuid, asZonedDateTime, asZonedDateTime, copy, isInfinity, isNaN, newUnsupportedException, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, update, updateUnknown
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Field Detail
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INSTANCE
public static final ClickHouseEmptyValue INSTANCE
Singleton.
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Method Detail
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asBigDecimal
public BigDecimal asBigDecimal(int scale)
Description copied from interface:ClickHouseValue
Gets value asBigDecimal
.- Specified by:
asBigDecimal
in interfaceClickHouseValue
- Parameters:
scale
- scale of the decimal- Returns:
- big decimal, could be null
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asBigInteger
public BigInteger asBigInteger()
Description copied from interface:ClickHouseValue
Gets value asBigInteger
.- Specified by:
asBigInteger
in interfaceClickHouseValue
- Returns:
- big integer, could be null
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asByte
public byte asByte()
Description copied from interface:ClickHouseValue
Gets value as byte.- Specified by:
asByte
in interfaceClickHouseValue
- Returns:
- byte value
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asDouble
public double asDouble()
Description copied from interface:ClickHouseValue
Gets value as double.- Specified by:
asDouble
in interfaceClickHouseValue
- Returns:
- double value
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asFloat
public float asFloat()
Description copied from interface:ClickHouseValue
Gets value as float.- Specified by:
asFloat
in interfaceClickHouseValue
- Returns:
- float value
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asInteger
public int asInteger()
Description copied from interface:ClickHouseValue
Gets value as integer.- Specified by:
asInteger
in interfaceClickHouseValue
- Returns:
- integer value
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asLong
public long asLong()
Description copied from interface:ClickHouseValue
Gets value as long.- Specified by:
asLong
in interfaceClickHouseValue
- Returns:
- long value
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asObject
public Object asObject()
Description copied from interface:ClickHouseValue
Gets value as an object.- Specified by:
asObject
in interfaceClickHouseValue
- Returns:
- an object representing the value, could be null
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asShort
public short asShort()
Description copied from interface:ClickHouseValue
Gets value as short.- Specified by:
asShort
in interfaceClickHouseValue
- Returns:
- short value
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copy
public ClickHouseValue copy(boolean deep)
Description copied from interface:ClickHouseValue
Gets a copy of this value object.- Specified by:
copy
in interfaceClickHouseValue
- Parameters:
deep
- true to create a deep copy; false for a shallow copy- Returns:
- copy of this value object
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isNullOrEmpty
public boolean isNullOrEmpty()
Description copied from interface:ClickHouseValue
Checks if the value is null, or empty for non-null types like Array, Tuple and Map.Please pay attention that only nullability will be considered for String, meaning this method will return
false
for an empty string. This is because String is treated as value-based type instead of a container like Array.- Specified by:
isNullOrEmpty
in interfaceClickHouseValue
- Returns:
- true if the value is null or empty; false otherwise
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resetToNullOrEmpty
public ClickHouseValue resetToNullOrEmpty()
Description copied from interface:ClickHouseValue
Resets value to null, or empty when null is not supported(e.g. Array, Tuple and Map etc.).Keep in mind that String is value-based type, so this method will change its value to null instead of an empty string.
- Specified by:
resetToNullOrEmpty
in interfaceClickHouseValue
- Returns:
- this object
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toSqlExpression
public String toSqlExpression()
Description copied from interface:ClickHouseValue
Converts the value to escaped SQL expression. For example, number 123 will be converted to123
, while string "12'3" will be converted to @{code '12\'3'}.- Specified by:
toSqlExpression
in interfaceClickHouseValue
- Returns:
- escaped SQL expression
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update
public ClickHouseValue update(byte value)
Description copied from interface:ClickHouseValue
Updates value.- Specified by:
update
in interfaceClickHouseValue
- Parameters:
value
- value to update- Returns:
- this object
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update
public ClickHouseValue update(short value)
Description copied from interface:ClickHouseValue
Updates value.- Specified by:
update
in interfaceClickHouseValue
- Parameters:
value
- value to update- Returns:
- this object
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update
public ClickHouseValue update(int value)
Description copied from interface:ClickHouseValue
Updates value.- Specified by:
update
in interfaceClickHouseValue
- Parameters:
value
- value to update- Returns:
- this object
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update
public ClickHouseValue update(long value)
Description copied from interface:ClickHouseValue
Updates value.- Specified by:
update
in interfaceClickHouseValue
- Parameters:
value
- value to update- Returns:
- this object
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update
public ClickHouseValue update(float value)
Description copied from interface:ClickHouseValue
Updates value.- Specified by:
update
in interfaceClickHouseValue
- Parameters:
value
- value to update- Returns:
- this object
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update
public ClickHouseValue update(double value)
Description copied from interface:ClickHouseValue
Updates value.- Specified by:
update
in interfaceClickHouseValue
- Parameters:
value
- value to update- Returns:
- this object
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update
public ClickHouseValue update(BigInteger value)
Description copied from interface:ClickHouseValue
Updates value.- Specified by:
update
in interfaceClickHouseValue
- Parameters:
value
- value to update- Returns:
- this object
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update
public ClickHouseValue update(BigDecimal value)
Description copied from interface:ClickHouseValue
Updates value.- Specified by:
update
in interfaceClickHouseValue
- Parameters:
value
- value to update- Returns:
- this object
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update
public ClickHouseValue update(String value)
Description copied from interface:ClickHouseValue
Updates value.- Specified by:
update
in interfaceClickHouseValue
- Parameters:
value
- value to update- Returns:
- this object
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update
public ClickHouseValue update(ClickHouseValue value)
Description copied from interface:ClickHouseValue
Updates value.- Specified by:
update
in interfaceClickHouseValue
- Parameters:
value
- value to update- Returns:
- this object
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