Class SQLTimestamp
- All Implemented Interfaces:
Externalizable
,Serializable
,Comparable
,Formatable
,Storable
,TypedFormat
,DataValueDescriptor
,DateTimeDataValue
,Orderable
SQLTimestamp is stored in 3 ints - an encoded date, an encoded time and nanoseconds encodedDate = 0 indicates a null WSCTimestamp SQLTimestamp is similar to SQLTimestamp, but it does conserves space by not keeping a GregorianCalendar object PERFORMANCE OPTIMIZATION: We only instantiate the value field when required due to the overhead of the Date methods. Thus, use isNull() instead of "value == null" and getTimestamp() instead of using value directly.
- See Also:
-
Field Summary
FieldsModifier and TypeFieldDescriptionprivate static final int
(package private) static final char
private static final char[]
private static final char[]
private static final char[]
private int
private int
private static final char[]
(package private) static final int
private static final char
private static final char
(package private) static final int
private int
private static final char
private static final char
(package private) static final int
private static final char[]
private static final char[]
Fields inherited from interface org.apache.derby.iapi.types.DataValueDescriptor
UNKNOWN_LOGICAL_LENGTH
Fields inherited from interface org.apache.derby.iapi.types.DateTimeDataValue
DAY_FIELD, DAY_INTERVAL, FRAC_SECOND_INTERVAL, HOUR_FIELD, HOUR_INTERVAL, MINUTE_FIELD, MINUTE_INTERVAL, MONTH_FIELD, MONTH_INTERVAL, QUARTER_INTERVAL, SECOND_FIELD, SECOND_INTERVAL, WEEK_INTERVAL, YEAR_FIELD, YEAR_INTERVAL
Fields inherited from interface org.apache.derby.iapi.types.Orderable
ORDER_OP_EQUALS, ORDER_OP_GREATEROREQUALS, ORDER_OP_GREATERTHAN, ORDER_OP_LESSOREQUALS, ORDER_OP_LESSTHAN
-
Constructor Summary
ConstructorsConstructorDescriptionno-arg constructor required by FormattableSQLTimestamp
(int encodedDate, int encodedTime, int nanos) SQLTimestamp
(String timestampStr, boolean isJDBCEscape, LocaleFinder localeFinder) Construct a timestamp from a string.SQLTimestamp
(String timestampStr, boolean isJDBCEscape, LocaleFinder localeFinder, Calendar cal) Construct a timestamp from a string.SQLTimestamp
(Timestamp value) Create a new SQLTimestamp instance that represents the specified Timestamp in the local time zone.SQLTimestamp
(Timestamp value, Calendar cal) Create a new SQLTimestamp instance that represents the specified Timestamp in the time zone of the given Calendar.SQLTimestamp
(DataValueDescriptor date, DataValueDescriptor time) -
Method Summary
Modifier and TypeMethodDescriptionprivate void
addInternal
(int calIntervalType, int count, SQLTimestamp tsResult) cloneValue
(boolean forceMaterialization) Clone this DataValueDescriptor.boolean
compare
(int op, DataValueDescriptor other, boolean orderedNulls, boolean unknownRV) Compare this Orderable with a given Orderable for the purpose of qualification and sorting.int
compare
(DataValueDescriptor other) Compare this Orderable with a given Orderable for the purpose of index positioning.private static int
computeEncodedDate
(Date value, Calendar currentCal) computeEncodedDate sets the date in a Calendar object and then uses the SQLDate function to compute an encoded date The encoded date is year << 16 + month << 8 + dateprivate static int
computeEncodedTime
(Date value, Calendar currentCal) computeEncodedTime extracts the hour, minute and seconds from a java.util.Date value and encodes them as hour << 16 + minute << 8 + second using the SQLTime function for encoding the datastatic DateTimeDataValue
computeTimestampFunction
(DataValueDescriptor operand, DataValueFactory dvf) Compute the SQL timestamp function.int
Estimate the memory usage in bytes of the data value and the overhead of the class.getDate returns the date portion of the timestamp Time is set to 00:00:00.0 Since Date is a JDBC object we use the JDBC definition for the time portion.getDate
(NumberDataValue result) Get the day of the month.getHours
(NumberDataValue result) Get the hour of the day out of a time or timestamp.int
Gets the length of the data value.getMinutes
(NumberDataValue result) Get the minute of the hour out of a time or timestamp.getMonth
(NumberDataValue result) Get the month number out of a date.Get a new null value of the same type as this data value.Gets the value in the data value descriptor as a int.getSeconds
(NumberDataValue source) Get the second of the minute out of a time or timestamp.Gets the value in the data value descriptor as a String.getTime returns the time portion of the timestamp Date is set to 1970-01-01 Since Time is a JDBC object we use the JDBC definition for the date portion.getTimestamp
(Calendar cal) Get the value field.int
Return my format identifier.Get the SQL name of the datatypegetYear
(NumberDataValue result) Get the year number out of a date.int
hashCode()
final boolean
isNull()
Check if the value is null.(package private) NumberDataValue
(package private) NumberDataValue
(package private) static int[]
parseDateOrTimestamp
(DateTimeParser parser, boolean timeRequired) Parse a timestamp or a date.(package private) static int
parseDateTimeInteger
(String str, int start, int ndigits) (package private) static int[]
parseLocalTimestamp
(String str, LocaleFinder localeFinder, Calendar cal) Parse a localized timestamp.private void
parseTimestamp
(String timestampStr, boolean isJDBCEscape, LocaleFinder localeFinder, Calendar cal) (package private) static SQLTimestamp
promote
(DateTimeDataValue dateTime, Date currentDate) Promotes a DateTimeDataValue to a timestamp.void
void
Restore this object to its (SQL)null value.private void
setCalendar
(Calendar cal) protected void
setFrom
(DataValueDescriptor theValue) Set the value of this DataValueDescriptor based on the value of the specified DataValueDescriptor.void
setInto
(PreparedStatement ps, int position) Set this value into a PreparedStatement.private void
setNumericTimestamp
(Timestamp value, Calendar cal) Set the encoded values for the timestamp(package private) void
Set the value from a correctly typed Timestamp object.void
Set the value of this DataValueDescriptor.void
Set the value of this DataValueDescriptor.void
Set the value of this DataValueDescriptor.void
setValueFromResultSet
(ResultSet resultSet, int colNumber, boolean isNullable) Set the value based on the value for the specified DataValueDescriptor from the specified ResultSet.timestampAdd
(int intervalType, NumberDataValue count, Date currentDate, DateTimeDataValue resultHolder) Add a number of intervals to a datetime value.timestampDiff
(int intervalType, DateTimeDataValue time1, Date currentDate, NumberDataValue resultHolder) Finds the difference between two datetime values as a number of intervals.toString()
int
Each built-in type in JSQL has a precedence.void
Methods inherited from class org.apache.derby.iapi.types.DataType
checkHostVariable, cloneHolder, coalesce, compare, compare, compareTo, dataTypeConversion, equals, equals, flip, genericSetObject, getBoolean, getByte, getBytes, getDouble, getFloat, getInt, getLong, getShort, getStream, getTraceString, getTypeName, greaterOrEquals, greaterThan, hasStream, in, invalidFormat, isNotNull, isNullOp, lessOrEquals, lessThan, normalize, notEquals, outOfRange, readExternalFromArray, recycle, setBigDecimal, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, throwLangSetMismatch, throwLangSetMismatch, typeToBigDecimal
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface org.apache.derby.iapi.types.DataValueDescriptor
checkHostVariable, cloneHolder, coalesce, compare, compare, equals, getBoolean, getByte, getBytes, getDouble, getFloat, getInt, getLong, getShort, getStream, getTraceString, greaterOrEquals, greaterThan, hasStream, in, isNotNull, isNullOp, lessOrEquals, lessThan, normalize, notEquals, readExternalFromArray, recycle, setBigDecimal, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, typeToBigDecimal
-
Field Details
-
MAX_FRACTION_DIGITS
static final int MAX_FRACTION_DIGITS- See Also:
-
FRACTION_TO_NANO
static final int FRACTION_TO_NANO- See Also:
-
ONE_BILLION
static final int ONE_BILLION- See Also:
-
encodedDate
private int encodedDate -
encodedTime
private int encodedTime -
nanos
private int nanos -
BASE_MEMORY_USAGE
private static final int BASE_MEMORY_USAGE -
DATE_SEPARATOR
static final char DATE_SEPARATOR- See Also:
-
DATE_SEPARATORS
private static final char[] DATE_SEPARATORS -
IBM_DATE_TIME_SEPARATOR
private static final char IBM_DATE_TIME_SEPARATOR- See Also:
-
ODBC_DATE_TIME_SEPARATOR
private static final char ODBC_DATE_TIME_SEPARATOR- See Also:
-
DATE_TIME_SEPARATORS
private static final char[] DATE_TIME_SEPARATORS -
DATE_TIME_SEPARATORS_OR_END
private static final char[] DATE_TIME_SEPARATORS_OR_END -
IBM_TIME_SEPARATOR
private static final char IBM_TIME_SEPARATOR- See Also:
-
ODBC_TIME_SEPARATOR
private static final char ODBC_TIME_SEPARATOR- See Also:
-
TIME_SEPARATORS
private static final char[] TIME_SEPARATORS -
TIME_SEPARATORS_OR_END
private static final char[] TIME_SEPARATORS_OR_END -
END_OF_STRING
private static final char[] END_OF_STRING
-
-
Constructor Details
-
SQLTimestamp
public SQLTimestamp()no-arg constructor required by Formattable -
SQLTimestamp
Create a new SQLTimestamp instance that represents the specified Timestamp in the time zone of the given Calendar.- Parameters:
value
- the Timestamp value to be represented by this instancecal
- the time zone of the calendar is used to construct the database timestamp value- Throws:
StandardException
- if an error occurs
-
SQLTimestamp
Create a new SQLTimestamp instance that represents the specified Timestamp in the local time zone.- Parameters:
value
- the Timestamp value to be represented by this instance- Throws:
StandardException
- if an error occurs
-
SQLTimestamp
SQLTimestamp(int encodedDate, int encodedTime, int nanos) -
SQLTimestamp
- Throws:
StandardException
-
SQLTimestamp
public SQLTimestamp(String timestampStr, boolean isJDBCEscape, LocaleFinder localeFinder) throws StandardException Construct a timestamp from a string. The allowed formats are:- JDBC escape: yyyy-mm-dd hh:mm:ss[.fffff]
- IBM: yyyy-mm-dd-hh.mm.ss[.nnnnnn]
- Throws:
StandardException
-
SQLTimestamp
public SQLTimestamp(String timestampStr, boolean isJDBCEscape, LocaleFinder localeFinder, Calendar cal) throws StandardException Construct a timestamp from a string. The allowed formats are:- JDBC escape: yyyy-mm-dd hh:mm:ss[.fffff]
- IBM: yyyy-mm-dd-hh.mm.ss[.nnnnnn]
- Throws:
StandardException
-
-
Method Details
-
estimateMemoryUsage
public int estimateMemoryUsage()Description copied from interface:DataValueDescriptor
Estimate the memory usage in bytes of the data value and the overhead of the class.- Specified by:
estimateMemoryUsage
in interfaceDataValueDescriptor
- Returns:
- the estimated memory usage
-
getString
Description copied from interface:DataValueDescriptor
Gets the value in the data value descriptor as a String. Throws an exception if the data value is not a string.- Specified by:
getString
in interfaceDataValueDescriptor
- Returns:
- The data value as a String.
-
getDate
getDate returns the date portion of the timestamp Time is set to 00:00:00.0 Since Date is a JDBC object we use the JDBC definition for the time portion. See JDBC API Tutorial, 47.3.12.- Specified by:
getDate
in interfaceDataValueDescriptor
- Overrides:
getDate
in classDataType
- Parameters:
cal
- calendar for object creation- Returns:
- The data value as a java.sql.Date.
- Throws:
StandardException
- thrown on failure
-
getTime
getTime returns the time portion of the timestamp Date is set to 1970-01-01 Since Time is a JDBC object we use the JDBC definition for the date portion. See JDBC API Tutorial, 47.3.12.- Specified by:
getTime
in interfaceDataValueDescriptor
- Overrides:
getTime
in classDataType
- Parameters:
cal
- calendar for object creation- Returns:
- The data value as a java.sql.Time.
- Throws:
StandardException
- thrown on failure
-
getObject
Description copied from class:DataType
Gets the value in the data value descriptor as a int. Throws an exception if the data value is not receivable as a int.- Specified by:
getObject
in interfaceDataValueDescriptor
- Overrides:
getObject
in classDataType
- Returns:
- The data value as a int.
-
getLength
public int getLength()Description copied from interface:DataValueDescriptor
Gets the length of the data value. The meaning of this is implementation-dependent. For string types, it is the number of characters in the string. For numeric types, it is the number of bytes used to store the number. This is the actual length of this value, not the length of the type it was defined as. For example, a VARCHAR value may be shorter than the declared VARCHAR (maximum) length.- Specified by:
getLength
in interfaceDataValueDescriptor
- Returns:
- The length of the data value
-
getTypeName
Description copied from interface:DataValueDescriptor
Get the SQL name of the datatype- Specified by:
getTypeName
in interfaceDataValueDescriptor
- Returns:
- The SQL name of the datatype
-
getTypeFormatId
public int getTypeFormatId()Return my format identifier.- Specified by:
getTypeFormatId
in interfaceTypedFormat
- Returns:
- The identifier. (A UUID stuffed in an array of 16 bytes).
- See Also:
-
writeExternal
- Specified by:
writeExternal
in interfaceExternalizable
- Throws:
IOException
- error writing data
-
readExternal
- Specified by:
readExternal
in interfaceExternalizable
- Throws:
IOException
- Thrown on error reading the object- See Also:
-
cloneValue
Description copied from interface:DataValueDescriptor
Clone this DataValueDescriptor. Results in a new object that has the same value as this but can be modified independently.Even though the objects can be modified independently regardless of the value of
forceMaterialization
, both the clone and the original may be dependent on the store state ifforceMaterialization
is set tofalse
. An example is if you need to access the value you just read usingcloneValue
after the current transaction has ended, or after the source result set has been closed.- Specified by:
cloneValue
in interfaceDataValueDescriptor
- Parameters:
forceMaterialization
- any streams representing the data value will be materialized iftrue
, the data value will be kept as a stream if possible iffalse
- Returns:
- A clone of the
DataValueDescriptor
with the same initial value as this. - See Also:
-
getNewNull
Description copied from interface:DataValueDescriptor
Get a new null value of the same type as this data value.- Specified by:
getNewNull
in interfaceDataValueDescriptor
- See Also:
-
restoreToNull
public void restoreToNull()Description copied from interface:Storable
Restore this object to its (SQL)null value.- Specified by:
restoreToNull
in interfaceStorable
- See Also:
-
setValueFromResultSet
public void setValueFromResultSet(ResultSet resultSet, int colNumber, boolean isNullable) throws SQLException, StandardException Description copied from interface:DataValueDescriptor
Set the value based on the value for the specified DataValueDescriptor from the specified ResultSet.- Specified by:
setValueFromResultSet
in interfaceDataValueDescriptor
- Parameters:
resultSet
- The specified ResultSet.colNumber
- The 1-based column # into the resultSet.isNullable
- Whether or not the column is nullable (No need to call wasNull() if not)- Throws:
SQLException
- Thrown on errorStandardException
- Thrown on error- See Also:
-
compare
Description copied from interface:DataValueDescriptor
Compare this Orderable with a given Orderable for the purpose of index positioning. This method treats nulls as ordered values - that is, it treats SQL null as equal to null and greater than all other values.- Specified by:
compare
in interfaceDataValueDescriptor
- Parameters:
other
- The Orderable to compare this one to.- Returns:
- <0 - this Orderable is less than other. 0 - this Orderable equals other. >0 - this Orderable is greater than other. The code should not explicitly look for -1, or 1.
- Throws:
StandardException
- Thrown on error
-
compare
public boolean compare(int op, DataValueDescriptor other, boolean orderedNulls, boolean unknownRV) throws StandardException Description copied from interface:DataValueDescriptor
Compare this Orderable with a given Orderable for the purpose of qualification and sorting. The caller gets to determine how nulls should be treated - they can either be ordered values or unknown values.- Specified by:
compare
in interfaceDataValueDescriptor
- Overrides:
compare
in classDataType
- Parameters:
op
- Orderable.ORDER_OP_EQUALS means do an = comparison. Orderable.ORDER_OP_LESSTHAN means compare this < other. Orderable.ORDER_OP_LESSOREQUALS means compare this <= other.other
- The DataValueDescriptor to compare this one to.orderedNulls
- True means to treat nulls as ordered values, that is, treat SQL null as equal to null, and less than all other values. False means to treat nulls as unknown values, that is, the result of any comparison with a null is the UNKNOWN truth value.unknownRV
- The return value to use if the result of the comparison is the UNKNOWN truth value. In other words, if orderedNulls is false, and a null is involved in the comparison, return unknownRV. This parameter is not used orderedNulls is true.- Returns:
- true if the comparison is true (duh!)
- Throws:
StandardException
- thrown on error
-
parseTimestamp
private void parseTimestamp(String timestampStr, boolean isJDBCEscape, LocaleFinder localeFinder, Calendar cal) throws StandardException - Throws:
StandardException
-
parseLocalTimestamp
static int[] parseLocalTimestamp(String str, LocaleFinder localeFinder, Calendar cal) throws StandardException, ParseException Parse a localized timestamp.- Parameters:
str
- the timestamp string, with trailing blanks removed.localeFinder
-- Returns:
- a {encodedDate, encodedTime} array.
- Throws:
ParseException
- If the string is not a valid timestamp.StandardException
-
parseDateOrTimestamp
static int[] parseDateOrTimestamp(DateTimeParser parser, boolean timeRequired) throws StandardException Parse a timestamp or a date. DB2 allows timestamps to be used as dates or times. So date('2004-04-15-16.15.32') is valid, as is date('2004-04-15'). This method does not handle localized timestamps.- Parameters:
parser
- a DateTimeParser initialized with a string.timeRequired
- If true then an error will be thrown if the time is missing. If false then the time may be omitted.- Returns:
- {encodedDate, encodedTime, nanosecond} array.
- Throws:
StandardException
- if the syntax is incorrect for an IBM standard timestamp.
-
setObject
Set the value from a correctly typed Timestamp object.- Overrides:
setObject
in classDataType
- Throws:
StandardException
-
setFrom
Description copied from class:DataType
Set the value of this DataValueDescriptor based on the value of the specified DataValueDescriptor.- Overrides:
setFrom
in classDataType
- Parameters:
theValue
- The DataValueDescriptor that holds the value to which we want to set this DataValueDescriptor's value.- Throws:
StandardException
-
setValue
Description copied from class:DataType
Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override- Specified by:
setValue
in interfaceDataValueDescriptor
- Overrides:
setValue
in classDataType
- Parameters:
value
- The Date value to set this DataValueDescriptor tocal
- The time zone from the calendar is used to construct the database date value- Throws:
StandardException
- See Also:
-
setValue
Description copied from class:DataType
Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override- Specified by:
setValue
in interfaceDataValueDescriptor
- Overrides:
setValue
in classDataType
- Parameters:
value
- The Timestamp value to set this DataValueDescriptor tocal
- The time zone from the calendar is used to construct the database timestamp value- Throws:
StandardException
- See Also:
-
setValue
Description copied from class:DataType
Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override- Specified by:
setValue
in interfaceDataValueDescriptor
- Overrides:
setValue
in classDataType
- Parameters:
theValue
- The BigDecimal value to set this DataValueDescriptor to- Throws:
StandardException
-
nullValueInt
NumberDataValue nullValueInt() -
nullValueDouble
NumberDataValue nullValueDouble() -
getYear
Description copied from interface:DateTimeDataValue
Get the year number out of a date.- Specified by:
getYear
in interfaceDateTimeDataValue
- Parameters:
result
- The result of the previous call to this method, null if not called yet.- Returns:
- A NumberDataValue containing the year number.
- Throws:
StandardException
- Thrown on error- See Also:
-
getMonth
Description copied from interface:DateTimeDataValue
Get the month number out of a date.- Specified by:
getMonth
in interfaceDateTimeDataValue
- Parameters:
result
- The result of the previous call to this method, null if not called yet.- Returns:
- A NumberDataValue containing the month number.
- Throws:
StandardException
- Thrown on error- See Also:
-
getDate
Description copied from interface:DateTimeDataValue
Get the day of the month.- Specified by:
getDate
in interfaceDateTimeDataValue
- Parameters:
result
- The result of the previous call to this method, null if not called yet.- Returns:
- A NumberDataValue containing the day of the month.
- Throws:
StandardException
- Thrown on error- See Also:
-
getHours
Description copied from interface:DateTimeDataValue
Get the hour of the day out of a time or timestamp.- Specified by:
getHours
in interfaceDateTimeDataValue
- Parameters:
result
- The result of the previous call to this method, null if not called yet.- Returns:
- A NumberDataValue containing the hour of the day.
- Throws:
StandardException
- Thrown on error- See Also:
-
getMinutes
Description copied from interface:DateTimeDataValue
Get the minute of the hour out of a time or timestamp.- Specified by:
getMinutes
in interfaceDateTimeDataValue
- Parameters:
result
- The result of the previous call to this method, null if not called yet.- Returns:
- A NumberDataValue containing the minute of the hour.
- Throws:
StandardException
- Thrown on error- See Also:
-
getSeconds
Description copied from interface:DateTimeDataValue
Get the second of the minute out of a time or timestamp.- Specified by:
getSeconds
in interfaceDateTimeDataValue
- Parameters:
source
- The result of the previous call to this method, null if not called yet.- Returns:
- A NumberDataValue containing the second of the minute.
- Throws:
StandardException
- Thrown on error- See Also:
-
toString
-
hashCode
public int hashCode() -
typePrecedence
public int typePrecedence()Description copied from class:DataType
Each built-in type in JSQL has a precedence. This precedence determines how to do type promotion when using binary operators. For example, float has a higher precedence than int, so when adding an int to a float, the result type is float. The precedence for some types is arbitrary. For example, it doesn't matter what the precedence of the boolean type is, since it can't be mixed with other types. But the precedence for the number types is critical. The SQL standard requires that exact numeric types be promoted to approximate numeric when one operator uses both. Also, the precedence is arranged so that one will not lose precision when promoting a type.- Specified by:
typePrecedence
in interfaceDataValueDescriptor
- Overrides:
typePrecedence
in classDataType
- Returns:
- The precedence of this type.
- See Also:
-
isNull
public final boolean isNull()Check if the value is null. encodedDate value of 0 is null -
getTimestamp
Get the value field. We instantiate the field on demand.- Specified by:
getTimestamp
in interfaceDataValueDescriptor
- Overrides:
getTimestamp
in classDataType
- Parameters:
cal
- calendar for object creation- Returns:
- The value field.
-
setCalendar
-
setNumericTimestamp
Set the encoded values for the timestamp- Throws:
StandardException
-
computeEncodedDate
computeEncodedDate sets the date in a Calendar object and then uses the SQLDate function to compute an encoded date The encoded date is year << 16 + month << 8 + date- Parameters:
value
- the value to convert- Returns:
- the encodedDate
- Throws:
StandardException
-
computeEncodedTime
computeEncodedTime extracts the hour, minute and seconds from a java.util.Date value and encodes them as hour << 16 + minute << 8 + second using the SQLTime function for encoding the data- Parameters:
value
- the value to convert- Returns:
- the encodedTime
- Throws:
StandardException
-
setInto
Description copied from interface:DataValueDescriptor
Set this value into a PreparedStatement. This method must handle setting NULL into the PreparedStatement.- Specified by:
setInto
in interfaceDataValueDescriptor
- Overrides:
setInto
in classDataType
- Throws:
SQLException
- thrown by the PreparedStatement objectStandardException
- thrown by me accessing my value.
-
computeTimestampFunction
public static DateTimeDataValue computeTimestampFunction(DataValueDescriptor operand, DataValueFactory dvf) throws StandardException Compute the SQL timestamp function.- Throws:
StandardException
-
parseDateTimeInteger
- Throws:
StandardException
-
timestampAdd
public DateTimeDataValue timestampAdd(int intervalType, NumberDataValue count, Date currentDate, DateTimeDataValue resultHolder) throws StandardException Add a number of intervals to a datetime value. Implements the JDBC escape TIMESTAMPADD function.- Specified by:
timestampAdd
in interfaceDateTimeDataValue
- Parameters:
intervalType
- One of FRAC_SECOND_INTERVAL, SECOND_INTERVAL, MINUTE_INTERVAL, HOUR_INTERVAL, DAY_INTERVAL, WEEK_INTERVAL, MONTH_INTERVAL, QUARTER_INTERVAL, or YEAR_INTERVALcount
- The number of intervals to addcurrentDate
- Used to convert time to timestampresultHolder
- If non-null a DateTimeDataValue that can be used to hold the result. If null then generate a new holder- Returns:
- startTime + intervalCount intervals, as a timestamp
- Throws:
StandardException
-
addInternal
private void addInternal(int calIntervalType, int count, SQLTimestamp tsResult) throws StandardException - Throws:
StandardException
-
timestampDiff
public NumberDataValue timestampDiff(int intervalType, DateTimeDataValue time1, Date currentDate, NumberDataValue resultHolder) throws StandardException Finds the difference between two datetime values as a number of intervals. Implements the JDBC TIMESTAMPDIFF escape function.- Specified by:
timestampDiff
in interfaceDateTimeDataValue
- Parameters:
intervalType
- One of FRAC_SECOND_INTERVAL, SECOND_INTERVAL, MINUTE_INTERVAL, HOUR_INTERVAL, DAY_INTERVAL, WEEK_INTERVAL, MONTH_INTERVAL, QUARTER_INTERVAL, or YEAR_INTERVALtime1
-currentDate
- Used to convert time to timestampresultHolder
- If non-null a NumberDataValue that can be used to hold the result. If null then generate a new holder- Returns:
- the number of intervals by which this datetime is greater than time1
- Throws:
StandardException
-
promote
Promotes a DateTimeDataValue to a timestamp.- Returns:
- the corresponding timestamp, using the current date if datetime is a time, or time 00:00:00 if datetime is a date.
- Throws:
StandardException
-