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提交 3e4566aa authored 作者: Evgenij Ryazanov's avatar Evgenij Ryazanov
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Extract DateTimeFunctions from Function

上级 07ddfaa0
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h2/src/main/org/h2/command/Parser.java
浏览文件 @ 3e4566aa
......@@ -147,6 +147,7 @@ import org.h2.table.Table;
import org.h2.table.TableFilter;
import org.h2.table.TableFilter.TableFilterVisitor;
import org.h2.table.TableView;
import org.h2.util.DateTimeFunctions;
import org.h2.util.MathUtils;
import org.h2.util.New;
import org.h2.util.ParserUtil;
......@@ -2798,7 +2799,7 @@ public class Parser {
}
case Function.DATE_ADD:
case Function.DATE_DIFF: {
if (Function.isDatePart(currentToken)) {
if (DateTimeFunctions.isDatePart(currentToken)) {
function.setParameter(0,
ValueExpression.get(ValueString.get(currentToken)));
read();
......
h2/src/main/org/h2/expression/Function.java
浏览文件 @ 3e4566aa
......@@ -10,16 +10,12 @@ import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.math.BigDecimal;
import java.nio.charset.StandardCharsets;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.DateFormatSymbols;
import java.util.ArrayList;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Locale;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
......@@ -44,6 +40,7 @@ import org.h2.table.Table;
import org.h2.table.TableFilter;
import org.h2.tools.CompressTool;
import org.h2.tools.Csv;
import org.h2.util.DateTimeFunctions;
import org.h2.util.DateTimeUtils;
import org.h2.util.IOUtils;
import org.h2.util.JdbcUtils;
......@@ -60,7 +57,6 @@ import org.h2.value.ValueArray;
import org.h2.value.ValueBoolean;
import org.h2.value.ValueBytes;
import org.h2.value.ValueDate;
import org.h2.value.ValueDecimal;
import org.h2.value.ValueDouble;
import org.h2.value.ValueInt;
import org.h2.value.ValueLong;
......@@ -150,14 +146,8 @@ public class Function extends Expression implements FunctionCall {
private static final long PRECISION_UNKNOWN = -1;
private static final HashMap<String, FunctionInfo> FUNCTIONS = new HashMap<>();
private static final HashMap<String, Integer> DATE_PART = new HashMap<>();
private static final char[] SOUNDEX_INDEX = new char[128];
/**
* English names of months and week days.
*/
private static volatile String[][] MONTHS_AND_WEEKS;
protected Expression[] args;
private final FunctionInfo info;
......@@ -168,54 +158,6 @@ public class Function extends Expression implements FunctionCall {
private final Database database;
static {
// DATE_PART
DATE_PART.put("SQL_TSI_YEAR", YEAR);
DATE_PART.put("YEAR", YEAR);
DATE_PART.put("YYYY", YEAR);
DATE_PART.put("YY", YEAR);
DATE_PART.put("SQL_TSI_MONTH", MONTH);
DATE_PART.put("MONTH", MONTH);
DATE_PART.put("MM", MONTH);
DATE_PART.put("M", MONTH);
DATE_PART.put("QUARTER", QUARTER);
DATE_PART.put("SQL_TSI_WEEK", WEEK);
DATE_PART.put("WW", WEEK);
DATE_PART.put("WK", WEEK);
DATE_PART.put("WEEK", WEEK);
DATE_PART.put("ISO_WEEK", ISO_WEEK);
DATE_PART.put("DAY", DAY_OF_MONTH);
DATE_PART.put("DD", DAY_OF_MONTH);
DATE_PART.put("D", DAY_OF_MONTH);
DATE_PART.put("SQL_TSI_DAY", DAY_OF_MONTH);
DATE_PART.put("DAY_OF_WEEK", DAY_OF_WEEK);
DATE_PART.put("DAYOFWEEK", DAY_OF_WEEK);
DATE_PART.put("DOW", DAY_OF_WEEK);
DATE_PART.put("ISO_DAY_OF_WEEK", ISO_DAY_OF_WEEK);
DATE_PART.put("DAYOFYEAR", DAY_OF_YEAR);
DATE_PART.put("DAY_OF_YEAR", DAY_OF_YEAR);
DATE_PART.put("DY", DAY_OF_YEAR);
DATE_PART.put("DOY", DAY_OF_YEAR);
DATE_PART.put("SQL_TSI_HOUR", HOUR);
DATE_PART.put("HOUR", HOUR);
DATE_PART.put("HH", HOUR);
DATE_PART.put("SQL_TSI_MINUTE", MINUTE);
DATE_PART.put("MINUTE", MINUTE);
DATE_PART.put("MI", MINUTE);
DATE_PART.put("N", MINUTE);
DATE_PART.put("SQL_TSI_SECOND", SECOND);
DATE_PART.put("SECOND", SECOND);
DATE_PART.put("SS", SECOND);
DATE_PART.put("S", SECOND);
DATE_PART.put("MILLISECOND", MILLISECOND);
DATE_PART.put("MS", MILLISECOND);
DATE_PART.put("EPOCH", EPOCH);
DATE_PART.put("MICROSECOND", MICROSECOND);
DATE_PART.put("MCS", MICROSECOND);
DATE_PART.put("NANOSECOND", NANOSECOND);
DATE_PART.put("NS", NANOSECOND);
DATE_PART.put("TIMEZONE_HOUR", TIMEZONE_HOUR);
DATE_PART.put("TIMEZONE_MINUTE", TIMEZONE_MINUTE);
// SOUNDEX_INDEX
String index = "7AEIOUY8HW1BFPV2CGJKQSXZ3DT4L5MN6R";
char number = 0;
......@@ -853,7 +795,7 @@ public class Function extends Expression implements FunctionCall {
break;
case DAY_NAME: {
int dayOfWeek = DateTimeUtils.getSundayDayOfWeek(DateTimeUtils.dateAndTimeFromValue(v0)[0]);
result = ValueString.get(getMonthsAndWeeks(1)[dayOfWeek],
result = ValueString.get(DateTimeFunctions.getMonthsAndWeeks(1)[dayOfWeek],
database.getMode().treatEmptyStringsAsNull);
break;
}
......@@ -870,11 +812,11 @@ public class Function extends Expression implements FunctionCall {
case SECOND:
case WEEK:
case YEAR:
result = ValueInt.get(getIntDatePart(v0, info.type));
result = ValueInt.get(DateTimeFunctions.getIntDatePart(v0, info.type));
break;
case MONTH_NAME: {
int month = DateTimeUtils.monthFromDateValue(DateTimeUtils.dateAndTimeFromValue(v0)[0]);
result = ValueString.get(getMonthsAndWeeks(0)[month - 1],
result = ValueString.get(DateTimeFunctions.getMonthsAndWeeks(0)[month - 1],
database.getMode().treatEmptyStringsAsNull);
break;
}
......@@ -1470,7 +1412,7 @@ public class Function extends Expression implements FunctionCall {
v1 == null ? null : v1.getString());
break;
case ADD_MONTHS:
result = dateadd("MONTH", v1.getInt(), v0);
result = DateTimeFunctions.dateadd("MONTH", v1.getInt(), v0);
break;
case TO_TIMESTAMP_TZ:
result = ToDateParser.toTimestampTz(v0.getString(),
......@@ -1489,10 +1431,10 @@ public class Function extends Expression implements FunctionCall {
database.getMode().treatEmptyStringsAsNull);
break;
case DATE_ADD:
result = dateadd(v0.getString(), v1.getLong(), v2);
result = DateTimeFunctions.dateadd(v0.getString(), v1.getLong(), v2);
break;
case DATE_DIFF:
result = ValueLong.get(datediff(v0.getString(), v1, v2));
result = ValueLong.get(DateTimeFunctions.datediff(v0.getString(), v1, v2));
break;
case DATE_TRUNC:
// Retrieve the time unit (e.g. 'day', 'microseconds', etc.)
......@@ -1501,60 +1443,9 @@ public class Function extends Expression implements FunctionCall {
result = DateTimeUtils.truncateDate(timeUnit, v1);
break;
case EXTRACT: {
int field = getDatePart(v0.getString());
if (field != EPOCH) {
result = ValueInt.get(getIntDatePart(v1, field));
} else {
// Case where we retrieve the EPOCH time.
// First we retrieve the dateValue and his time in nanoseconds.
long[] a = DateTimeUtils.dateAndTimeFromValue(v1);
long dateValue = a[0];
long timeNanos = a[1];
// We compute the time in nanoseconds and the total number of days.
BigDecimal timeNanosBigDecimal = new BigDecimal(timeNanos);
BigDecimal numberOfDays = new BigDecimal(DateTimeUtils.absoluteDayFromDateValue(dateValue));
BigDecimal nanosSeconds = new BigDecimal(1_000_000_000);
BigDecimal secondsPerDay = new BigDecimal(DateTimeUtils.SECONDS_PER_DAY);
// Case where the value is of type time e.g. '10:00:00'
if (v1 instanceof ValueTime) {
// In order to retrieve the EPOCH time we only have to convert the time
// in nanoseconds (previously retrieved) in seconds.
result = ValueDecimal.get(timeNanosBigDecimal.divide(nanosSeconds));
} else if (v1 instanceof ValueDate) {
// Case where the value is of type date '2000:01:01', we have to retrieve the
// total number of days and multiply it by the number of seconds in a day.
result = ValueDecimal.get(numberOfDays.multiply(secondsPerDay));
} else if (v1 instanceof ValueTimestampTimeZone) {
// Case where the value is a of type ValueTimestampTimeZone
// ('2000:01:01 10:00:00+05').
// We retrieve the time zone offset in minutes
ValueTimestampTimeZone v = (ValueTimestampTimeZone) v1;
BigDecimal timeZoneOffsetSeconds = new BigDecimal(v.getTimeZoneOffsetMins() * 60);
// Sum the time in nanoseconds and the total number of days in seconds
// and adding the timeZone offset in seconds.
result = ValueDecimal.get(timeNanosBigDecimal.divide(nanosSeconds)
.add(numberOfDays.multiply(secondsPerDay)).subtract(timeZoneOffsetSeconds));
} else {
// By default, we have the date and the time ('2000:01:01 10:00:00') if no type
// is given.
// We just have to sum the time in nanoseconds and the total number of days in
// seconds.
result = ValueDecimal
.get(timeNanosBigDecimal.divide(nanosSeconds).add(numberOfDays.multiply(secondsPerDay)));
}
}
case EXTRACT:
result = DateTimeFunctions.extract(v0.getString(), v1);
break;
}
case FORMATDATETIME: {
if (v0 == ValueNull.INSTANCE || v1 == ValueNull.INSTANCE) {
result = ValueNull.INSTANCE;
......@@ -1849,244 +1740,6 @@ public class Function extends Expression implements FunctionCall {
return bytes;
}
/**
* Check if a given string is a valid date part string.
*
* @param part the string
* @return true if it is
*/
public static boolean isDatePart(String part) {
Integer p = DATE_PART.get(StringUtils.toUpperEnglish(part));
return p != null;
}
private static int getDatePart(String part) {
Integer p = DATE_PART.get(StringUtils.toUpperEnglish(part));
if (p == null) {
throw DbException.getInvalidValueException("date part", part);
}
return p.intValue();
}
private static Value dateadd(String part, long count, Value v) {
int field = getDatePart(part);
if (field != MILLISECOND && field != MICROSECOND && field != NANOSECOND &&
(count > Integer.MAX_VALUE || count < Integer.MIN_VALUE)) {
throw DbException.getInvalidValueException("DATEADD count", count);
}
boolean withDate = !(v instanceof ValueTime);
boolean withTime = !(v instanceof ValueDate);
boolean forceTimestamp = false;
long[] a = DateTimeUtils.dateAndTimeFromValue(v);
long dateValue = a[0];
long timeNanos = a[1];
switch (field) {
case QUARTER:
count *= 3;
//$FALL-THROUGH$
case YEAR:
case MONTH: {
if (!withDate) {
throw DbException.getInvalidValueException("DATEADD time part", part);
}
long year = DateTimeUtils.yearFromDateValue(dateValue);
long month = DateTimeUtils.monthFromDateValue(dateValue);
int day = DateTimeUtils.dayFromDateValue(dateValue);
if (field == YEAR) {
year += count;
} else {
month += count;
}
dateValue = DateTimeUtils.dateValueFromDenormalizedDate(year, month, day);
return DateTimeUtils.dateTimeToValue(v, dateValue, timeNanos, forceTimestamp);
}
case WEEK:
case ISO_WEEK:
count *= 7;
//$FALL-THROUGH$
case DAY_OF_WEEK:
case ISO_DAY_OF_WEEK:
case DAY_OF_MONTH:
case DAY_OF_YEAR:
if (!withDate) {
throw DbException.getInvalidValueException("DATEADD time part", part);
}
dateValue = DateTimeUtils.dateValueFromAbsoluteDay(
DateTimeUtils.absoluteDayFromDateValue(dateValue) + count);
return DateTimeUtils.dateTimeToValue(v, dateValue, timeNanos, forceTimestamp);
case HOUR:
count *= 3_600_000_000_000L;
break;
case MINUTE:
count *= 60_000_000_000L;
break;
case SECOND:
case EPOCH:
count *= 1_000_000_000;
break;
case MILLISECOND:
count *= 1_000_000;
break;
case MICROSECOND:
count *= 1_000;
break;
case NANOSECOND:
break;
case TIMEZONE_HOUR:
count *= 60;
//$FALL-THROUGH$
case TIMEZONE_MINUTE: {
if (!(v instanceof ValueTimestampTimeZone)) {
throw DbException.getUnsupportedException("DATEADD " + part);
}
count += ((ValueTimestampTimeZone) v).getTimeZoneOffsetMins();
return ValueTimestampTimeZone.fromDateValueAndNanos(dateValue, timeNanos, (short) count);
}
default:
throw DbException.getUnsupportedException("DATEADD " + part);
}
if (!withTime) {
// Treat date as timestamp at the start of this date
forceTimestamp = true;
}
timeNanos += count;
if (timeNanos >= DateTimeUtils.NANOS_PER_DAY || timeNanos < 0) {
long d;
if (timeNanos >= DateTimeUtils.NANOS_PER_DAY) {
d = timeNanos / DateTimeUtils.NANOS_PER_DAY;
} else {
d = (timeNanos - DateTimeUtils.NANOS_PER_DAY + 1) / DateTimeUtils.NANOS_PER_DAY;
}
timeNanos -= d * DateTimeUtils.NANOS_PER_DAY;
return DateTimeUtils.dateTimeToValue(v,
DateTimeUtils.dateValueFromAbsoluteDay(DateTimeUtils.absoluteDayFromDateValue(dateValue) + d),
timeNanos, forceTimestamp);
}
return DateTimeUtils.dateTimeToValue(v, dateValue, timeNanos, forceTimestamp);
}
/**
* Calculate the number of crossed unit boundaries between two timestamps.
* This method is supported for MS SQL Server compatibility.
* <pre>
* DATEDIFF(YEAR, '2004-12-31', '2005-01-01') = 1
* </pre>
*
* @param part the part
* @param v1 the first date-time value
* @param v2 the second date-time value
* @return the number of crossed boundaries
*/
private static long datediff(String part, Value v1, Value v2) {
int field = getDatePart(part);
long[] a1 = DateTimeUtils.dateAndTimeFromValue(v1);
long dateValue1 = a1[0];
long absolute1 = DateTimeUtils.absoluteDayFromDateValue(dateValue1);
long[] a2 = DateTimeUtils.dateAndTimeFromValue(v2);
long dateValue2 = a2[0];
long absolute2 = DateTimeUtils.absoluteDayFromDateValue(dateValue2);
switch (field) {
case NANOSECOND:
case MICROSECOND:
case MILLISECOND:
case SECOND:
case EPOCH:
case MINUTE:
case HOUR:
long timeNanos1 = a1[1];
long timeNanos2 = a2[1];
switch (field) {
case NANOSECOND:
return (absolute2 - absolute1) * DateTimeUtils.NANOS_PER_DAY
+ (timeNanos2 - timeNanos1);
case MICROSECOND:
return (absolute2 - absolute1) * (DateTimeUtils.MILLIS_PER_DAY * 1_000)
+ (timeNanos2 / 1_000 - timeNanos1 / 1_000);
case MILLISECOND:
return (absolute2 - absolute1) * DateTimeUtils.MILLIS_PER_DAY
+ (timeNanos2 / 1_000_000 - timeNanos1 / 1_000_000);
case SECOND:
case EPOCH:
return (absolute2 - absolute1) * 86_400
+ (timeNanos2 / 1_000_000_000 - timeNanos1 / 1_000_000_000);
case MINUTE:
return (absolute2 - absolute1) * 1_440
+ (timeNanos2 / 60_000_000_000L - timeNanos1 / 60_000_000_000L);
case HOUR:
return (absolute2 - absolute1) * 24
+ (timeNanos2 / 3_600_000_000_000L - timeNanos1 / 3_600_000_000_000L);
}
// Fake fall-through
//$FALL-THROUGH$
case DAY_OF_MONTH:
case DAY_OF_YEAR:
case DAY_OF_WEEK:
case ISO_DAY_OF_WEEK:
return absolute2 - absolute1;
case WEEK:
return weekdiff(absolute1, absolute2, 0);
case ISO_WEEK:
return weekdiff(absolute1, absolute2, 1);
case MONTH:
return (DateTimeUtils.yearFromDateValue(dateValue2) - DateTimeUtils.yearFromDateValue(dateValue1)) * 12
+ DateTimeUtils.monthFromDateValue(dateValue2) - DateTimeUtils.monthFromDateValue(dateValue1);
case QUARTER:
return (DateTimeUtils.yearFromDateValue(dateValue2) - DateTimeUtils.yearFromDateValue(dateValue1)) * 4
+ (DateTimeUtils.monthFromDateValue(dateValue2) - 1) / 3
- (DateTimeUtils.monthFromDateValue(dateValue1) - 1) / 3;
case YEAR:
return DateTimeUtils.yearFromDateValue(dateValue2) - DateTimeUtils.yearFromDateValue(dateValue1);
case TIMEZONE_HOUR:
case TIMEZONE_MINUTE: {
int offsetMinutes1;
if (v1 instanceof ValueTimestampTimeZone) {
offsetMinutes1 = ((ValueTimestampTimeZone) v1).getTimeZoneOffsetMins();
} else {
offsetMinutes1 = DateTimeUtils.getTimeZoneOffsetMillis(null, dateValue1, a1[1]);
}
int offsetMinutes2;
if (v2 instanceof ValueTimestampTimeZone) {
offsetMinutes2 = ((ValueTimestampTimeZone) v2).getTimeZoneOffsetMins();
} else {
offsetMinutes2 = DateTimeUtils.getTimeZoneOffsetMillis(null, dateValue2, a2[1]);
}
if (field == TIMEZONE_HOUR) {
return (offsetMinutes2 / 60) - (offsetMinutes1 / 60);
} else {
return offsetMinutes2 - offsetMinutes1;
}
}
default:
throw DbException.getUnsupportedException("DATEDIFF " + part);
}
}
private static long weekdiff(long absolute1, long absolute2, int firstDayOfWeek) {
absolute1 += 4 - firstDayOfWeek;
long r1 = absolute1 / 7;
if (absolute1 < 0 && (r1 * 7 != absolute1)) {
r1--;
}
absolute2 += 4 - firstDayOfWeek;
long r2 = absolute2 / 7;
if (absolute2 < 0 && (r2 * 7 != absolute2)) {
r2--;
}
return r2 - r1;
}
private static String[] getMonthsAndWeeks(int field) {
String[][] result = MONTHS_AND_WEEKS;
if (result == null) {
result = new String[2][];
DateFormatSymbols dfs = DateFormatSymbols.getInstance(Locale.ENGLISH);
result[0] = dfs.getMonths();
result[1] = dfs.getWeekdays();
MONTHS_AND_WEEKS = result;
}
return result[field];
}
private static String substring(String s, int start, int length) {
int len = s.length();
start--;
......@@ -2920,69 +2573,6 @@ public class Function extends Expression implements FunctionCall {
}
}
/**
* Get the specified field of a date, however with years normalized to
* positive or negative, and month starting with 1.
*
* @param date the date value
* @param field the field type, see {@link Function} for constants
* @return the value
*/
public static int getIntDatePart(Value date, int field) {
long[] a = DateTimeUtils.dateAndTimeFromValue(date);
long dateValue = a[0];
long timeNanos = a[1];
switch (field) {
case YEAR:
return DateTimeUtils.yearFromDateValue(dateValue);
case MONTH:
return DateTimeUtils.monthFromDateValue(dateValue);
case DAY_OF_MONTH:
return DateTimeUtils.dayFromDateValue(dateValue);
case HOUR:
return (int) (timeNanos / 3_600_000_000_000L % 24);
case MINUTE:
return (int) (timeNanos / 60_000_000_000L % 60);
case SECOND:
return (int) (timeNanos / 1_000_000_000 % 60);
case MILLISECOND:
return (int) (timeNanos / 1_000_000 % 1_000);
case MICROSECOND:
return (int) (timeNanos / 1_000 % 1_000_000);
case NANOSECOND:
return (int) (timeNanos % 1_000_000_000);
case DAY_OF_YEAR:
return DateTimeUtils.getDayOfYear(dateValue);
case DAY_OF_WEEK:
return DateTimeUtils.getSundayDayOfWeek(dateValue);
case WEEK:
GregorianCalendar gc = DateTimeUtils.getCalendar();
return DateTimeUtils.getWeekOfYear(dateValue, gc.getFirstDayOfWeek() - 1, gc.getMinimalDaysInFirstWeek());
case QUARTER:
return (DateTimeUtils.monthFromDateValue(dateValue) - 1) / 3 + 1;
case ISO_YEAR:
return DateTimeUtils.getIsoWeekYear(dateValue);
case ISO_WEEK:
return DateTimeUtils.getIsoWeekOfYear(dateValue);
case ISO_DAY_OF_WEEK:
return DateTimeUtils.getIsoDayOfWeek(dateValue);
case TIMEZONE_HOUR:
case TIMEZONE_MINUTE: {
int offsetMinutes;
if (date instanceof ValueTimestampTimeZone) {
offsetMinutes = ((ValueTimestampTimeZone) date).getTimeZoneOffsetMins();
} else {
offsetMinutes = DateTimeUtils.getTimeZoneOffsetMillis(null, dateValue, timeNanos);
}
if (field == TIMEZONE_HOUR) {
return offsetMinutes / 60;
}
return offsetMinutes % 60;
}
}
throw DbException.getUnsupportedException("getDatePart(" + date + ", " + field + ')');
}
@Override
public Expression[] getArgs() {
return args;
......
h2/src/main/org/h2/util/DateTimeFunctions.java 0 → 100644
浏览文件 @ 3e4566aa
/*
* Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.util;
import static org.h2.expression.Function.DAY_OF_MONTH;
import static org.h2.expression.Function.DAY_OF_WEEK;
import static org.h2.expression.Function.DAY_OF_YEAR;
import static org.h2.expression.Function.EPOCH;
import static org.h2.expression.Function.HOUR;
import static org.h2.expression.Function.ISO_DAY_OF_WEEK;
import static org.h2.expression.Function.ISO_WEEK;
import static org.h2.expression.Function.ISO_YEAR;
import static org.h2.expression.Function.MICROSECOND;
import static org.h2.expression.Function.MILLISECOND;
import static org.h2.expression.Function.MINUTE;
import static org.h2.expression.Function.MONTH;
import static org.h2.expression.Function.NANOSECOND;
import static org.h2.expression.Function.QUARTER;
import static org.h2.expression.Function.SECOND;
import static org.h2.expression.Function.TIMEZONE_HOUR;
import static org.h2.expression.Function.TIMEZONE_MINUTE;
import static org.h2.expression.Function.WEEK;
import static org.h2.expression.Function.YEAR;
import java.math.BigDecimal;
import java.text.DateFormatSymbols;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Locale;
import org.h2.expression.Function;
import org.h2.message.DbException;
import org.h2.value.Value;
import org.h2.value.ValueDate;
import org.h2.value.ValueDecimal;
import org.h2.value.ValueInt;
import org.h2.value.ValueTime;
import org.h2.value.ValueTimestampTimeZone;
/**
* Date and time functions.
*/
public final class DateTimeFunctions {
private static final HashMap<String, Integer> DATE_PART = new HashMap<>();
/**
* English names of months and week days.
*/
private static volatile String[][] MONTHS_AND_WEEKS;
static {
// DATE_PART
DATE_PART.put("SQL_TSI_YEAR", YEAR);
DATE_PART.put("YEAR", YEAR);
DATE_PART.put("YYYY", YEAR);
DATE_PART.put("YY", YEAR);
DATE_PART.put("SQL_TSI_MONTH", MONTH);
DATE_PART.put("MONTH", MONTH);
DATE_PART.put("MM", MONTH);
DATE_PART.put("M", MONTH);
DATE_PART.put("QUARTER", QUARTER);
DATE_PART.put("SQL_TSI_WEEK", WEEK);
DATE_PART.put("WW", WEEK);
DATE_PART.put("WK", WEEK);
DATE_PART.put("WEEK", WEEK);
DATE_PART.put("ISO_WEEK", ISO_WEEK);
DATE_PART.put("DAY", DAY_OF_MONTH);
DATE_PART.put("DD", DAY_OF_MONTH);
DATE_PART.put("D", DAY_OF_MONTH);
DATE_PART.put("SQL_TSI_DAY", DAY_OF_MONTH);
DATE_PART.put("DAY_OF_WEEK", DAY_OF_WEEK);
DATE_PART.put("DAYOFWEEK", DAY_OF_WEEK);
DATE_PART.put("DOW", DAY_OF_WEEK);
DATE_PART.put("ISO_DAY_OF_WEEK", ISO_DAY_OF_WEEK);
DATE_PART.put("DAYOFYEAR", DAY_OF_YEAR);
DATE_PART.put("DAY_OF_YEAR", DAY_OF_YEAR);
DATE_PART.put("DY", DAY_OF_YEAR);
DATE_PART.put("DOY", DAY_OF_YEAR);
DATE_PART.put("SQL_TSI_HOUR", HOUR);
DATE_PART.put("HOUR", HOUR);
DATE_PART.put("HH", HOUR);
DATE_PART.put("SQL_TSI_MINUTE", MINUTE);
DATE_PART.put("MINUTE", MINUTE);
DATE_PART.put("MI", MINUTE);
DATE_PART.put("N", MINUTE);
DATE_PART.put("SQL_TSI_SECOND", SECOND);
DATE_PART.put("SECOND", SECOND);
DATE_PART.put("SS", SECOND);
DATE_PART.put("S", SECOND);
DATE_PART.put("MILLISECOND", MILLISECOND);
DATE_PART.put("MS", MILLISECOND);
DATE_PART.put("EPOCH", EPOCH);
DATE_PART.put("MICROSECOND", MICROSECOND);
DATE_PART.put("MCS", MICROSECOND);
DATE_PART.put("NANOSECOND", NANOSECOND);
DATE_PART.put("NS", NANOSECOND);
DATE_PART.put("TIMEZONE_HOUR", TIMEZONE_HOUR);
DATE_PART.put("TIMEZONE_MINUTE", TIMEZONE_MINUTE);
}
/**
* DATEADD function.
*
* @param part
* name of date-time part
* @param count
* count to add
* @param v
* value to add to
* @return result
*/
public static Value dateadd(String part, long count, Value v) {
int field = getDatePart(part);
if (field != MILLISECOND && field != MICROSECOND && field != NANOSECOND
&& (count > Integer.MAX_VALUE || count < Integer.MIN_VALUE)) {
throw DbException.getInvalidValueException("DATEADD count", count);
}
boolean withDate = !(v instanceof ValueTime);
boolean withTime = !(v instanceof ValueDate);
boolean forceTimestamp = false;
long[] a = DateTimeUtils.dateAndTimeFromValue(v);
long dateValue = a[0];
long timeNanos = a[1];
switch (field) {
case QUARTER:
count *= 3;
//$FALL-THROUGH$
case YEAR:
case MONTH: {
if (!withDate) {
throw DbException.getInvalidValueException("DATEADD time part", part);
}
long year = DateTimeUtils.yearFromDateValue(dateValue);
long month = DateTimeUtils.monthFromDateValue(dateValue);
int day = DateTimeUtils.dayFromDateValue(dateValue);
if (field == YEAR) {
year += count;
} else {
month += count;
}
dateValue = DateTimeUtils.dateValueFromDenormalizedDate(year, month, day);
return DateTimeUtils.dateTimeToValue(v, dateValue, timeNanos, forceTimestamp);
}
case WEEK:
case ISO_WEEK:
count *= 7;
//$FALL-THROUGH$
case DAY_OF_WEEK:
case ISO_DAY_OF_WEEK:
case DAY_OF_MONTH:
case DAY_OF_YEAR:
if (!withDate) {
throw DbException.getInvalidValueException("DATEADD time part", part);
}
dateValue = DateTimeUtils
.dateValueFromAbsoluteDay(DateTimeUtils.absoluteDayFromDateValue(dateValue) + count);
return DateTimeUtils.dateTimeToValue(v, dateValue, timeNanos, forceTimestamp);
case HOUR:
count *= 3_600_000_000_000L;
break;
case MINUTE:
count *= 60_000_000_000L;
break;
case SECOND:
case EPOCH:
count *= 1_000_000_000;
break;
case MILLISECOND:
count *= 1_000_000;
break;
case MICROSECOND:
count *= 1_000;
break;
case NANOSECOND:
break;
case TIMEZONE_HOUR:
count *= 60;
//$FALL-THROUGH$
case TIMEZONE_MINUTE: {
if (!(v instanceof ValueTimestampTimeZone)) {
throw DbException.getUnsupportedException("DATEADD " + part);
}
count += ((ValueTimestampTimeZone) v).getTimeZoneOffsetMins();
return ValueTimestampTimeZone.fromDateValueAndNanos(dateValue, timeNanos, (short) count);
}
default:
throw DbException.getUnsupportedException("DATEADD " + part);
}
if (!withTime) {
// Treat date as timestamp at the start of this date
forceTimestamp = true;
}
timeNanos += count;
if (timeNanos >= DateTimeUtils.NANOS_PER_DAY || timeNanos < 0) {
long d;
if (timeNanos >= DateTimeUtils.NANOS_PER_DAY) {
d = timeNanos / DateTimeUtils.NANOS_PER_DAY;
} else {
d = (timeNanos - DateTimeUtils.NANOS_PER_DAY + 1) / DateTimeUtils.NANOS_PER_DAY;
}
timeNanos -= d * DateTimeUtils.NANOS_PER_DAY;
return DateTimeUtils.dateTimeToValue(v,
DateTimeUtils.dateValueFromAbsoluteDay(DateTimeUtils.absoluteDayFromDateValue(dateValue) + d),
timeNanos, forceTimestamp);
}
return DateTimeUtils.dateTimeToValue(v, dateValue, timeNanos, forceTimestamp);
}
/**
* Calculate the number of crossed unit boundaries between two timestamps. This
* method is supported for MS SQL Server compatibility.
*
* <pre>
* DATEDIFF(YEAR, '2004-12-31', '2005-01-01') = 1
* </pre>
*
* @param part
* the part
* @param v1
* the first date-time value
* @param v2
* the second date-time value
* @return the number of crossed boundaries
*/
public static long datediff(String part, Value v1, Value v2) {
int field = getDatePart(part);
long[] a1 = DateTimeUtils.dateAndTimeFromValue(v1);
long dateValue1 = a1[0];
long absolute1 = DateTimeUtils.absoluteDayFromDateValue(dateValue1);
long[] a2 = DateTimeUtils.dateAndTimeFromValue(v2);
long dateValue2 = a2[0];
long absolute2 = DateTimeUtils.absoluteDayFromDateValue(dateValue2);
switch (field) {
case NANOSECOND:
case MICROSECOND:
case MILLISECOND:
case SECOND:
case EPOCH:
case MINUTE:
case HOUR:
long timeNanos1 = a1[1];
long timeNanos2 = a2[1];
switch (field) {
case NANOSECOND:
return (absolute2 - absolute1) * DateTimeUtils.NANOS_PER_DAY + (timeNanos2 - timeNanos1);
case MICROSECOND:
return (absolute2 - absolute1) * (DateTimeUtils.MILLIS_PER_DAY * 1_000)
+ (timeNanos2 / 1_000 - timeNanos1 / 1_000);
case MILLISECOND:
return (absolute2 - absolute1) * DateTimeUtils.MILLIS_PER_DAY
+ (timeNanos2 / 1_000_000 - timeNanos1 / 1_000_000);
case SECOND:
case EPOCH:
return (absolute2 - absolute1) * 86_400 + (timeNanos2 / 1_000_000_000 - timeNanos1 / 1_000_000_000);
case MINUTE:
return (absolute2 - absolute1) * 1_440 + (timeNanos2 / 60_000_000_000L - timeNanos1 / 60_000_000_000L);
case HOUR:
return (absolute2 - absolute1) * 24
+ (timeNanos2 / 3_600_000_000_000L - timeNanos1 / 3_600_000_000_000L);
}
// Fake fall-through
// $FALL-THROUGH$
case DAY_OF_MONTH:
case DAY_OF_YEAR:
case DAY_OF_WEEK:
case ISO_DAY_OF_WEEK:
return absolute2 - absolute1;
case WEEK:
return weekdiff(absolute1, absolute2, 0);
case ISO_WEEK:
return weekdiff(absolute1, absolute2, 1);
case MONTH:
return (DateTimeUtils.yearFromDateValue(dateValue2) - DateTimeUtils.yearFromDateValue(dateValue1)) * 12
+ DateTimeUtils.monthFromDateValue(dateValue2) - DateTimeUtils.monthFromDateValue(dateValue1);
case QUARTER:
return (DateTimeUtils.yearFromDateValue(dateValue2) - DateTimeUtils.yearFromDateValue(dateValue1)) * 4
+ (DateTimeUtils.monthFromDateValue(dateValue2) - 1) / 3
- (DateTimeUtils.monthFromDateValue(dateValue1) - 1) / 3;
case YEAR:
return DateTimeUtils.yearFromDateValue(dateValue2) - DateTimeUtils.yearFromDateValue(dateValue1);
case TIMEZONE_HOUR:
case TIMEZONE_MINUTE: {
int offsetMinutes1;
if (v1 instanceof ValueTimestampTimeZone) {
offsetMinutes1 = ((ValueTimestampTimeZone) v1).getTimeZoneOffsetMins();
} else {
offsetMinutes1 = DateTimeUtils.getTimeZoneOffsetMillis(null, dateValue1, a1[1]);
}
int offsetMinutes2;
if (v2 instanceof ValueTimestampTimeZone) {
offsetMinutes2 = ((ValueTimestampTimeZone) v2).getTimeZoneOffsetMins();
} else {
offsetMinutes2 = DateTimeUtils.getTimeZoneOffsetMillis(null, dateValue2, a2[1]);
}
if (field == TIMEZONE_HOUR) {
return (offsetMinutes2 / 60) - (offsetMinutes1 / 60);
} else {
return offsetMinutes2 - offsetMinutes1;
}
}
default:
throw DbException.getUnsupportedException("DATEDIFF " + part);
}
}
/**
* Extracts specified field from the specified date-time value.
*
* @param part
* the date part
* @param value
* the date-time value
* @return extracted field
*/
public static Value extract(String part, Value value) {
Value result;
int field = getDatePart(part);
if (field != EPOCH) {
result = ValueInt.get(getIntDatePart(value, field));
} else {
// Case where we retrieve the EPOCH time.
// First we retrieve the dateValue and his time in nanoseconds.
long[] a = DateTimeUtils.dateAndTimeFromValue(value);
long dateValue = a[0];
long timeNanos = a[1];
// We compute the time in nanoseconds and the total number of days.
BigDecimal timeNanosBigDecimal = new BigDecimal(timeNanos);
BigDecimal numberOfDays = new BigDecimal(DateTimeUtils.absoluteDayFromDateValue(dateValue));
BigDecimal nanosSeconds = new BigDecimal(1_000_000_000);
BigDecimal secondsPerDay = new BigDecimal(DateTimeUtils.SECONDS_PER_DAY);
// Case where the value is of type time e.g. '10:00:00'
if (value instanceof ValueTime) {
// In order to retrieve the EPOCH time we only have to convert the time
// in nanoseconds (previously retrieved) in seconds.
result = ValueDecimal.get(timeNanosBigDecimal.divide(nanosSeconds));
} else if (value instanceof ValueDate) {
// Case where the value is of type date '2000:01:01', we have to retrieve the
// total number of days and multiply it by the number of seconds in a day.
result = ValueDecimal.get(numberOfDays.multiply(secondsPerDay));
} else if (value instanceof ValueTimestampTimeZone) {
// Case where the value is a of type ValueTimestampTimeZone
// ('2000:01:01 10:00:00+05').
// We retrieve the time zone offset in minutes
ValueTimestampTimeZone v = (ValueTimestampTimeZone) value;
BigDecimal timeZoneOffsetSeconds = new BigDecimal(v.getTimeZoneOffsetMins() * 60);
// Sum the time in nanoseconds and the total number of days in seconds
// and adding the timeZone offset in seconds.
result = ValueDecimal.get(timeNanosBigDecimal.divide(nanosSeconds)
.add(numberOfDays.multiply(secondsPerDay)).subtract(timeZoneOffsetSeconds));
} else {
// By default, we have the date and the time ('2000:01:01 10:00:00') if no type
// is given.
// We just have to sum the time in nanoseconds and the total number of days in
// seconds.
result = ValueDecimal
.get(timeNanosBigDecimal.divide(nanosSeconds).add(numberOfDays.multiply(secondsPerDay)));
}
}
return result;
}
private static int getDatePart(String part) {
Integer p = DATE_PART.get(StringUtils.toUpperEnglish(part));
if (p == null) {
throw DbException.getInvalidValueException("date part", part);
}
return p.intValue();
}
/**
* Get the specified field of a date, however with years normalized to positive
* or negative, and month starting with 1.
*
* @param date
* the date value
* @param field
* the field type, see {@link Function} for constants
* @return the value
*/
public static int getIntDatePart(Value date, int field) {
long[] a = DateTimeUtils.dateAndTimeFromValue(date);
long dateValue = a[0];
long timeNanos = a[1];
switch (field) {
case YEAR:
return DateTimeUtils.yearFromDateValue(dateValue);
case MONTH:
return DateTimeUtils.monthFromDateValue(dateValue);
case DAY_OF_MONTH:
return DateTimeUtils.dayFromDateValue(dateValue);
case HOUR:
return (int) (timeNanos / 3_600_000_000_000L % 24);
case MINUTE:
return (int) (timeNanos / 60_000_000_000L % 60);
case SECOND:
return (int) (timeNanos / 1_000_000_000 % 60);
case MILLISECOND:
return (int) (timeNanos / 1_000_000 % 1_000);
case MICROSECOND:
return (int) (timeNanos / 1_000 % 1_000_000);
case NANOSECOND:
return (int) (timeNanos % 1_000_000_000);
case DAY_OF_YEAR:
return DateTimeUtils.getDayOfYear(dateValue);
case DAY_OF_WEEK:
return DateTimeUtils.getSundayDayOfWeek(dateValue);
case WEEK:
GregorianCalendar gc = DateTimeUtils.getCalendar();
return DateTimeUtils.getWeekOfYear(dateValue, gc.getFirstDayOfWeek() - 1, gc.getMinimalDaysInFirstWeek());
case QUARTER:
return (DateTimeUtils.monthFromDateValue(dateValue) - 1) / 3 + 1;
case ISO_YEAR:
return DateTimeUtils.getIsoWeekYear(dateValue);
case ISO_WEEK:
return DateTimeUtils.getIsoWeekOfYear(dateValue);
case ISO_DAY_OF_WEEK:
return DateTimeUtils.getIsoDayOfWeek(dateValue);
case TIMEZONE_HOUR:
case TIMEZONE_MINUTE: {
int offsetMinutes;
if (date instanceof ValueTimestampTimeZone) {
offsetMinutes = ((ValueTimestampTimeZone) date).getTimeZoneOffsetMins();
} else {
offsetMinutes = DateTimeUtils.getTimeZoneOffsetMillis(null, dateValue, timeNanos);
}
if (field == TIMEZONE_HOUR) {
return offsetMinutes / 60;
}
return offsetMinutes % 60;
}
}
throw DbException.getUnsupportedException("getDatePart(" + date + ", " + field + ')');
}
/**
* Return names of month or weeks.
*
* @param field
* 0 for months, 1 for weekdays
* @return names of month or weeks
*/
public static String[] getMonthsAndWeeks(int field) {
String[][] result = MONTHS_AND_WEEKS;
if (result == null) {
result = new String[2][];
DateFormatSymbols dfs = DateFormatSymbols.getInstance(Locale.ENGLISH);
result[0] = dfs.getMonths();
result[1] = dfs.getWeekdays();
MONTHS_AND_WEEKS = result;
}
return result[field];
}
/**
* Check if a given string is a valid date part string.
*
* @param part
* the string
* @return true if it is
*/
public static boolean isDatePart(String part) {
return DATE_PART.containsKey(StringUtils.toUpperEnglish(part));
}
private static long weekdiff(long absolute1, long absolute2, int firstDayOfWeek) {
absolute1 += 4 - firstDayOfWeek;
long r1 = absolute1 / 7;
if (absolute1 < 0 && (r1 * 7 != absolute1)) {
r1--;
}
absolute2 += 4 - firstDayOfWeek;
long r2 = absolute2 / 7;
if (absolute2 < 0 && (r2 * 7 != absolute2)) {
r2--;
}
return r2 - r1;
}
private DateTimeFunctions() {
}
}
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