org.h2.mode

Class FunctionsMySQL

java.lang.Object

org.h2.expression.Expression

org.h2.expression.function.Function

org.h2.mode.FunctionsMySQL

All Implemented Interfaces:

FunctionCall

public class FunctionsMySQL
extends Function

This class implements some MySQL-specific functions.

Field Summary

Fields inherited from class org.h2.expression.function.Function

ABS, ACOS, ADD_MONTHS, args, ARRAY_APPEND, ARRAY_CONCAT, ARRAY_CONTAINS, ARRAY_GET, ARRAY_LENGTH, ARRAY_SLICE, ASCII, ASIN, ATAN, ATAN2, AUTOCOMMIT, BIT_LENGTH, BITAND, BITGET, BITOR, BITXOR, CANCEL_SESSION, CASE, CASEWHEN, CAST, CEILING, CENTURY, CHAR, CHAR_LENGTH, COALESCE, COMPRESS, CONCAT, CONCAT_WS, CONVERT, COS, COSH, COT, CSVREAD, CSVWRITE, CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP, CURRENT_USER, CURRVAL, DATABASE, DATABASE_PATH, DATE_ADD, DATE_DIFF, DATE_TRUNC, DAY_NAME, DAY_OF_MONTH, DAY_OF_WEEK, DAY_OF_YEAR, DECADE, DECODE, DECRYPT, DEGREES, DIFFERENCE, DISK_SPACE_USED, DOW, ENCRYPT, EPOCH, ESTIMATED_ENVELOPE, EXP, EXPAND, EXTRACT, FILE_READ, FILE_WRITE, FLOOR, FORMATDATETIME, GREATEST, H2VERSION, HASH, HEXTORAW, HOUR, IDENTITY, IFNULL, info, INSERT, INSTR, ISO_DAY_OF_WEEK, ISO_WEEK, ISO_YEAR, LCASE, LEAST, LEFT, LENGTH, LINK_SCHEMA, LN, LOCALTIME, LOCALTIMESTAMP, LOCATE, LOCK_MODE, LOCK_TIMEOUT, LOG, LOG10, LOWER, LPAD, LTRIM, MEMORY_FREE, MEMORY_USED, MICROSECOND, MILLENNIUM, MILLISECOND, MINUTE, MOD, MONTH, MONTH_NAME, NANOSECOND, NEXTVAL, NULLIF, NVL2, OCTET_LENGTH, ORA_HASH, PARSEDATETIME, PI, POSITION, POWER, QUARTER, RADIANS, RAND, RANDOM_UUID, RAWTOHEX, READONLY, REGEXP_LIKE, REGEXP_REPLACE, REPEAT, REPLACE, RIGHT, ROUND, ROUNDMAGIC, RPAD, RTRIM, SCHEMA, SCOPE_IDENTITY, SECOND, SECURE_RAND, SESSION_ID, SET, SIGN, SIGNAL, SIN, SINH, SOUNDEX, SPACE, SQRT, STRINGDECODE, STRINGENCODE, STRINGTOUTF8, SUBSTR, SUBSTRING, TABLE, TABLE_DISTINCT, TAN, TANH, TIMEZONE_HOUR, TIMEZONE_MINUTE, TO_CHAR, TO_DATE, TO_TIMESTAMP, TO_TIMESTAMP_TZ, TRANSACTION_ID, TRANSLATE, TRIM, TRUNCATE, TRUNCATE_VALUE, type, UCASE, UNNEST, UPPER, USER, UTF8TOSTRING, VALUES, VAR_ARGS, WEEK, XMLATTR, XMLCDATA, XMLCOMMENT, XMLNODE, XMLSTARTDOC, XMLTEXT, YEAR, ZERO

Fields inherited from class org.h2.expression.Expression

MAP_IN_AGGREGATE, MAP_IN_WINDOW, MAP_INITIAL

Method Summary

Methods

Modifier and Type	Method and Description
protected void	checkParameterCount(int len) Check if the parameter count is correct.
static java.lang.String	fromUnixTime(int seconds) See http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_from-unixtime
static java.lang.String	fromUnixTime(int seconds, java.lang.String format) See http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_from-unixtime
static Function	getFunction(Database database, java.lang.String upperName) Returns mode-specific function for a given name, or null.
protected Value	getValueWithArgs(Session session, Expression[] args) Return the resulting value for the given expression arguments.
Expression	optimize(Session session) Try to optimize the expression.
static int	unixTimestamp() Get the seconds since 1970-01-01 00:00:00 UTC.
static int	unixTimestamp(java.sql.Timestamp timestamp) Get the seconds since 1970-01-01 00:00:00 UTC of the given timestamp.

Methods inherited from class org.h2.expression.function.Function

doneWithParameters, getArgs, getCost, getFunctionInfo, getFunctionType, getName, getNullOrValue, getSQL, getSubexpression, getSubexpressionCount, getType, getValue, getValueForColumnList, getValueType, isBufferResultSetToLocalTemp, isDeterministic, isEverything, isGeneratedKey, mapColumns, setDataType, setEvaluatable, setParameter, updateAggregate

Methods inherited from class org.h2.expression.Expression

addFilterConditions, createIndexConditions, getAlias, getBooleanValue, getColumnName, getExpressionColumns, getExpressionColumns, getExpressionColumns, getNonAliasExpression, getNotIfPossible, getNullable, getSchemaName, getSQL, getTableAlias, getTableName, getUnenclosedSQL, isAutoIncrement, isConstant, isValueSet, toString, writeExpressions, writeExpressions

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.h2.expression.function.FunctionCall

getSQL

Method Detail

unixTimestamp

public static int unixTimestamp()

Get the seconds since 1970-01-01 00:00:00 UTC. See http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_unix-timestamp

Returns:

the current timestamp in seconds (not milliseconds).

unixTimestamp

public static int unixTimestamp(java.sql.Timestamp timestamp)

Get the seconds since 1970-01-01 00:00:00 UTC of the given timestamp. See http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_unix-timestamp

Parameters:

timestamp - the timestamp

Returns:

the current timestamp in seconds (not milliseconds).

fromUnixTime

public static java.lang.String fromUnixTime(int seconds)

See http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_from-unixtime

Parameters:

seconds - The current timestamp in seconds.

Returns:

a formatted date/time String in the format "yyyy-MM-dd HH:mm:ss".

fromUnixTime

public static java.lang.String fromUnixTime(int seconds,
                            java.lang.String format)

See http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_from-unixtime

Parameters:

seconds - The current timestamp in seconds.

format - The format of the date/time String to return.

Returns:

a formatted date/time String in the given format.

getFunction

public static Function getFunction(Database database,
                   java.lang.String upperName)

Returns mode-specific function for a given name, or null.

Parameters:

database - the database

upperName - the upper-case name of a function

Returns:

the function with specified name or null

checkParameterCount

protected void checkParameterCount(int len)

Description copied from class: Function

Check if the parameter count is correct.

Overrides:

checkParameterCount in class Function

Parameters:

len - the number of parameters set

optimize

public Expression optimize(Session session)

Description copied from class: Expression

Try to optimize the expression.

Specified by:

optimize in interface FunctionCall

Overrides:

optimize in class Function

Parameters:

session - the session

Returns:

the optimized expression

getValueWithArgs

protected Value getValueWithArgs(Session session,
                     Expression[] args)

Description copied from class: Function

Return the resulting value for the given expression arguments.

Overrides:

getValueWithArgs in class Function

Parameters:

session - the session

args - argument expressions

Returns:

the result