org.h2.result

Class SearchRow

java.lang.Object

org.h2.value.VersionedValue<Value>

org.h2.value.Value

org.h2.result.SearchRow

All Implemented Interfaces:

HasSQL, Typed

Direct Known Subclasses:

Row, SimpleRowValue

public abstract class SearchRow
extends Value

The base class for rows stored in a table, and for partial rows stored in the index.

Field Summary

Fields

Modifier and Type	Field and Description
protected long	key The row key.
static long	MATCH_ALL_ROW_KEY If the key is this value, then the key is considered equal to all other keys, when comparing.
static int	MEMORY_CALCULATE The constant that means "memory usage is unknown and needs to be calculated first".
static int	ROWID_INDEX Index of a virtual "_ROWID_" column within a row or a table

Fields inherited from class org.h2.value.Value

ARRAY, BIGINT, BINARY, BLOB, BOOLEAN, CHAR, CLOB, DATE, DECFLOAT, DOUBLE, EMPTY_VALUES, ENUM, GEOMETRY, 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, 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

Constructor Summary

Constructors

Constructor and Description
SearchRow()

Method Summary

Modifier and Type	Method and Description
int	compareTypeSafe(Value v, CompareMode mode, CastDataProvider provider) Compare this value against another value given that the values are of the same data type.
abstract void	copyFrom(SearchRow source) Copy all relevant values from the source to this row.
boolean	equals(java.lang.Object other) Check if the two values have the same hash code.
abstract int	getColumnCount() Get the column count.
long	getKey() Get the unique key of the row.
abstract int	getMemory() Get the estimated memory used for this row, in bytes.
java.lang.StringBuilder	getSQL(java.lang.StringBuilder builder, int sqlFlags) Appends the SQL statement of this object to the specified builder.
java.lang.String	getString() Get the value as a string.
TypeInfo	getType() Returns the data type.
abstract Value	getValue(int index) Get the value for the column
int	getValueType() Get the value type.
int	hashCode()
boolean	isNull(int index) Determine if specified column contains NULL
void	setKey(long key) Set the unique key of the row.
abstract void	setValue(int index, Value v) Set the value for given column

Methods inherited from class org.h2.value.Value

add, castTo, charLength, clearCache, compareTo, compareWithNull, containsNull, convertForAssignTo, convertTo, convertTo, convertTo, convertTo, convertTo, convertToAnyArray, convertToAnyRow, convertToBigint, convertToBoolean, convertToChar, convertToDate, convertToDouble, convertToEnum, convertToGeometry, convertToInt, convertToInt, convertToJavaObject, convertToReal, convertToSmallint, convertToTinyint, convertToUuid, divide, getBigDecimal, getBoolean, getByte, getBytes, getBytesNoCopy, getDouble, getFloat, getHigherOrder, getInputStream, getInputStream, getInt, getLong, getReader, getReader, getShort, getSignum, getTypeName, getUnsupportedExceptionForOperation, isFalse, isTrue, modulus, multiply, negate, octetLength, 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

Field Detail

ROWID_INDEX

public static final int ROWID_INDEX

Index of a virtual "_ROWID_" column within a row or a table

See Also:

Constant Field Values

MATCH_ALL_ROW_KEY

public static long MATCH_ALL_ROW_KEY

If the key is this value, then the key is considered equal to all other keys, when comparing.

MEMORY_CALCULATE

public static final int MEMORY_CALCULATE

The constant that means "memory usage is unknown and needs to be calculated first".

See Also:

Constant Field Values

key

protected long key

The row key.

Constructor Detail

SearchRow

public SearchRow()

Method Detail

getColumnCount

public abstract int getColumnCount()

Get the column count.

Returns:

the column count

isNull

public boolean isNull(int index)

Determine if specified column contains NULL

Parameters:

index - column index

Returns:

true if NULL

getValue

public abstract Value getValue(int index)

Get the value for the column

Parameters:

index - the column number (starting with 0)

Returns:

the value

setValue

public abstract void setValue(int index,
                              Value v)

Set the value for given column

Parameters:

index - the column number (starting with 0)

v - the new value

setKey

public void setKey(long key)

Set the unique key of the row.

Parameters:

key - the key

getKey

public long getKey()

Get the unique key of the row.

Returns:

the key

getMemory

public abstract int getMemory()

Get the estimated memory used for this row, in bytes.

Overrides:

getMemory in class Value

Returns:

the memory

copyFrom

public abstract void copyFrom(SearchRow source)

Copy all relevant values from the source to this row.

Parameters:

source - source of column values

getType

public TypeInfo getType()

Description copied from interface: Typed

Returns the data type.

Specified by:

getType in interface Typed

Specified by:

getType in class Value

Returns:

the data type

getValueType

public int getValueType()

Description copied from class: Value

Get the value type.

Specified by:

getValueType in class Value

Returns:

the value type

getSQL

public java.lang.StringBuilder getSQL(java.lang.StringBuilder builder,
                                      int sqlFlags)

Description copied from interface: HasSQL

Appends the SQL statement of this object to the specified builder.

Parameters:

builder - string builder

sqlFlags - formatting flags

Returns:

the specified string builder

getString

public java.lang.String getString()

Description copied from class: Value

Get the value as a string.

Specified by:

getString in class Value

Returns:

the string

hashCode

public int hashCode()

Specified by:

hashCode in class Value

equals

public boolean equals(java.lang.Object other)

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.

Specified by:

equals in class Value

Parameters:

other - the other value

Returns:

true if they are equal

compareTypeSafe

public int compareTypeSafe(Value v,
                           CompareMode mode,
                           CastDataProvider provider)

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 class Value

Parameters:

v - the other value

mode - the compare mode

provider - the cast information provider

Returns:

0 if both values are equal, -1 if the other value is smaller, and 1 otherwise