Package org.h2.value
Class ValueNull
Implementation of NULL. NULL is not a regular data type.
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Field Summary
FieldsModifier and TypeFieldDescription(package private) static final int
The display size of the textual representation of NULL.static final ValueNull
The main NULL instance.(package private) static final int
The precision of NULL.Fields inherited from class org.h2.value.Value
ARRAY, ASSIGN_TO, BIGINT, BINARY, BLOB, BOOLEAN, CAST_TO, CHAR, CLOB, CONVERT_TO, DATE, DECFLOAT, DOUBLE, EMPTY_VALUES, ENUM, GEOMETRY, GROUP_BINARY_STRING, GROUP_BOOLEAN, GROUP_CHARACTER_STRING, GROUP_COLLECTION, GROUP_DATETIME, GROUP_INTERVAL_DT, GROUP_INTERVAL_YM, GROUP_NULL, GROUP_NUMERIC, GROUP_OTHER, GROUPS, INTEGER, INTERVAL_DAY, INTERVAL_DAY_TO_HOUR, INTERVAL_DAY_TO_MINUTE, INTERVAL_DAY_TO_SECOND, INTERVAL_HOUR, INTERVAL_HOUR_TO_MINUTE, INTERVAL_HOUR_TO_SECOND, INTERVAL_MINUTE, INTERVAL_MINUTE_TO_SECOND, INTERVAL_MONTH, INTERVAL_SECOND, INTERVAL_YEAR, INTERVAL_YEAR_TO_MONTH, JAVA_OBJECT, JSON, MAX_LONG_DECIMAL, MIN_LONG_DECIMAL, NULL, NUMERIC, REAL, ROW, SMALLINT, TIME, TIME_TZ, TIMESTAMP, TIMESTAMP_TZ, TINYINT, TYPE_COUNT, UNKNOWN, UUID, VARBINARY, VARCHAR, VARCHAR_IGNORECASE
Fields inherited from interface org.h2.util.HasSQL
ADD_PLAN_INFORMATION, DEFAULT_SQL_FLAGS, NO_CASTS, QUOTE_ONLY_WHEN_REQUIRED, REPLACE_LOBS_FOR_TRACE, TRACE_SQL_FLAGS
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint
compareTypeSafe
(Value v, CompareMode mode, CastDataProvider provider) Compare this value against another value given that the values are of the same data type.boolean
Returns true if this value is NULL or contains NULL value.boolean
Check if the two values have the same hash code.boolean
Returns this value as a Javaboolean
value.byte
getByte()
Returns this value as a Javabyte
value.byte[]
getBytes()
double
Returns this value as a Javadouble
value.float
getFloat()
Returns this value as a Javafloat
value.getInputStream
(long oneBasedOffset, long length) Get the input streamint
getInt()
Returns this value as a Javaint
value.long
getLong()
Returns this value as a Javalong
value.int
Get the memory used by this object.getReader
(long oneBasedOffset, long length) Get the readershort
getShort()
Returns this value as a Javashort
value.getSQL
(StringBuilder builder, int sqlFlags) Appends the SQL statement of this object to the specified builder.Get the value as a string.getType()
Returns the data type.int
Get the value type.int
hashCode()
Methods inherited from class org.h2.value.Value
add, cache, castTo, charLength, clearCache, compareTo, compareWithNull, convertForAssignTo, convertTo, convertTo, convertTo, convertTo, convertTo, convertToAnyArray, convertToAnyRow, convertToBigint, convertToBoolean, convertToChar, convertToDate, convertToDouble, convertToEnum, convertToGeometry, convertToInt, convertToInt, convertToJavaObject, convertToReal, convertToSmallint, convertToTinyint, convertToUuid, divide, getBytesNoCopy, getDataConversionError, getDataConversionError, getHigherOrder, getHigherOrderKnown, getSignum, getTypeName, getUnsupportedExceptionForOperation, getValueTooLongException, isFalse, isTrue, modulus, multiply, negate, octetLength, rangeCheck, subtract, toString
Methods inherited from class org.h2.value.VersionedValue
getCommittedValue, getCurrentValue, getOperationId, isCommitted
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface org.h2.util.HasSQL
getSQL, getTraceSQL
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Field Details
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INSTANCE
The main NULL instance. -
PRECISION
static final int PRECISIONThe precision of NULL.- See Also:
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DISPLAY_SIZE
static final int DISPLAY_SIZEThe display size of the textual representation of NULL.- See Also:
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Constructor Details
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ValueNull
private ValueNull()
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Method Details
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getSQL
Description copied from interface:HasSQL
Appends the SQL statement of this object to the specified builder.- Parameters:
builder
- string buildersqlFlags
- formatting flags- Returns:
- the specified string builder
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getType
Description copied from interface:Typed
Returns the data type. -
getValueType
public int getValueType()Description copied from class:Value
Get the value type.- Specified by:
getValueType
in classValue
- Returns:
- the value type
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getMemory
public int getMemory()Description copied from class:Value
Get the memory used by this object. -
getString
Description copied from class:Value
Get the value as a string. -
getReader
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getReader
Description copied from class:Value
Get the reader -
getBytes
public byte[] getBytes() -
getInputStream
- Overrides:
getInputStream
in classValue
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getInputStream
Description copied from class:Value
Get the input stream- Overrides:
getInputStream
in classValue
- Parameters:
oneBasedOffset
- the offset (1 means no offset)length
- the requested length- Returns:
- the new input stream
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getBoolean
public boolean getBoolean()Description copied from class:Value
Returns this value as a Javaboolean
value.- Overrides:
getBoolean
in classValue
- Returns:
- value
- See Also:
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getByte
public byte getByte()Description copied from class:Value
Returns this value as a Javabyte
value. -
getShort
public short getShort()Description copied from class:Value
Returns this value as a Javashort
value. -
getInt
public int getInt()Description copied from class:Value
Returns this value as a Javaint
value. -
getLong
public long getLong()Description copied from class:Value
Returns this value as a Javalong
value. -
getBigDecimal
- Overrides:
getBigDecimal
in classValue
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getFloat
public float getFloat()Description copied from class:Value
Returns this value as a Javafloat
value. -
getDouble
public double getDouble()Description copied from class:Value
Returns this value as a Javadouble
value. -
compareTypeSafe
Description copied from class:Value
Compare this value against another value given that the values are of the same data type.- Specified by:
compareTypeSafe
in classValue
- Parameters:
v
- the other valuemode
- the compare modeprovider
- the cast information provider- Returns:
- 0 if both values are equal, -1 if the other value is smaller, and 1 otherwise
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containsNull
public boolean containsNull()Description copied from class:Value
Returns true if this value is NULL or contains NULL value.- Overrides:
containsNull
in classValue
- Returns:
- true if this value is NULL or contains NULL value
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hashCode
public int hashCode() -
equals
Description copied from class:Value
Check if the two values have the same hash code. No data conversion is made; this method returns false if the other object is not of the same class. For some values, compareTo may return 0 even if equals return false. Example: ValueDecimal 0.0 and 0.00.
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