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h2database
Unverified 提交 621bfd06 authored 作者: Noel Grandin's avatar Noel Grandin 提交者： GitHub
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Merge pull request #877 from katzyn/datetime 

Reimplement TO_CHAR without a Calendar and fix 12 AM / 12 PM in it
上级 22ed525f 6d59f0ab
隐藏空白字符变更
内嵌 并排
正在显示 包含 108 行增加 和 77 行删除
h2/src/main/org/h2/expression/Function.java
浏览文件 @ 621bfd06
......@@ -1449,7 +1449,8 @@ public class Function extends Expression implements FunctionCall {
case Value.TIME:
case Value.DATE:
case Value.TIMESTAMP:
result = ValueString.get(ToChar.toChar(v0.getTimestamp(),
case Value.TIMESTAMP_TZ:
result = ValueString.get(ToChar.toCharDateTime(v0,
v1 == null ? null : v1.getString(),
v2 == null ? null : v2.getString()),
database.getMode().treatEmptyStringsAsNull);
......
h2/src/main/org/h2/util/ToChar.java
浏览文件 @ 621bfd06
......@@ -6,20 +6,18 @@
package org.h2.util;
import java.math.BigDecimal;
import java.sql.Date;
import java.sql.Timestamp;
import java.text.DateFormatSymbols;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Currency;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;
import org.h2.api.ErrorCode;
import org.h2.message.DbException;
import org.h2.value.Value;
/**
* Emulates Oracle's TO_CHAR function.
......@@ -29,7 +27,7 @@ public class ToChar {
/**
* The beginning of the Julian calendar.
*/
private static final long JULIAN_EPOCH;
private static final int JULIAN_EPOCH = -2_440_588;
private static final int[] ROMAN_VALUES = { 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9,
5, 4, 1 };
......@@ -37,14 +35,9 @@ public class ToChar {
private static final String[] ROMAN_NUMERALS = { "M", "CM", "D", "CD", "C", "XC",
"L", "XL", "X", "IX", "V", "IV", "I" };
static {
GregorianCalendar epoch = new GregorianCalendar(Locale.ENGLISH);
epoch.setGregorianChange(new Date(Long.MAX_VALUE));
epoch.clear();
epoch.set(4713, Calendar.JANUARY, 1, 0, 0, 0);
epoch.set(Calendar.ERA, GregorianCalendar.BC);
JULIAN_EPOCH = epoch.getTimeInMillis();
}
private static final int MONTHS = 0, SHORT_MONTHS = 1, WEEKDAYS = 2, SHORT_WEEKDAYS = 3, AM_PM = 4;
private static volatile String[][] NAMES;
private ToChar() {
// utility class
......@@ -460,6 +453,28 @@ public class ToChar {
return hex;
}
private static String[] getNames(int names) {
String[][] result = NAMES;
if (result == null) {
result = new String[5][];
DateFormatSymbols dfs = DateFormatSymbols.getInstance();
result[MONTHS] = dfs.getMonths();
String[] months = dfs.getShortMonths();
for (int i = 0; i < 12; i++) {
String month = months[i];
if (month.endsWith(".")) {
months[i] = month.substring(0, month.length() - 1);
}
}
result[SHORT_MONTHS] = months;
result[WEEKDAYS] = dfs.getWeekdays();
result[SHORT_WEEKDAYS] = dfs.getShortWeekdays();
result[AM_PM] = dfs.getAmPmStrings();
NAMES = result;
}
return result[names];
}
/**
* Emulates Oracle's TO_CHAR(datetime) function.
*
......@@ -592,19 +607,31 @@ public class ToChar {
* See also TO_CHAR(datetime) and datetime format models
* in the Oracle documentation.
*
* @param ts the timestamp to format
* @param value the date-time value to format
* @param format the format pattern to use (if any)
* @param nlsParam the NLS parameter (if any)
* @return the formatted timestamp
*/
public static String toChar(Timestamp ts, String format, @SuppressWarnings("unused") String nlsParam) {
public static String toCharDateTime(Value value, String format, @SuppressWarnings("unused") String nlsParam) {
long[] a = DateTimeUtils.dateAndTimeFromValue(value);
long dateValue = a[0];
long timeNanos = a[1];
int year = DateTimeUtils.yearFromDateValue(dateValue);
int monthOfYear = DateTimeUtils.monthFromDateValue(dateValue);
int dayOfMonth = DateTimeUtils.dayFromDateValue(dateValue);
int posYear = Math.abs(year);
long second = timeNanos / 1_000_000_000;
int nanos = (int) (timeNanos - second * 1_000_000_000);
int minute = (int) (second / 60);
second -= minute * 60;
int hour = minute / 60;
minute -= hour * 60;
int h12 = (hour + 11) % 12 + 1;
boolean isAM = hour < 12;
if (format == null) {
format = "DD-MON-YY HH.MI.SS.FF PM";
}
GregorianCalendar cal = new GregorianCalendar(Locale.ENGLISH);
cal.setTimeInMillis(ts.getTime());
StringBuilder output = new StringBuilder();
boolean fillMode = true;
......@@ -615,106 +642,113 @@ public class ToChar {
// AD / BC
if ((cap = containsAt(format, i, "A.D.", "B.C.")) != null) {
String era = cal.get(Calendar.ERA) == GregorianCalendar.AD ? "A.D." : "B.C.";
String era = year > 0 ? "A.D." : "B.C.";
output.append(cap.apply(era));
i += 4;
} else if ((cap = containsAt(format, i, "AD", "BC")) != null) {
String era = cal.get(Calendar.ERA) == GregorianCalendar.AD ? "AD" : "BC";
String era = year > 0 ? "AD" : "BC";
output.append(cap.apply(era));
i += 2;
// AM / PM
} else if ((cap = containsAt(format, i, "A.M.", "P.M.")) != null) {
String am = cal.get(Calendar.AM_PM) == Calendar.AM ? "A.M." : "P.M.";
String am = isAM ? "A.M." : "P.M.";
output.append(cap.apply(am));
i += 4;
} else if ((cap = containsAt(format, i, "AM", "PM")) != null) {
String am = cal.get(Calendar.AM_PM) == Calendar.AM ? "AM" : "PM";
String am = isAM ? "AM" : "PM";
output.append(cap.apply(am));
i += 2;
// Long/short date/time format
} else if ((cap = containsAt(format, i, "DL")) != null) {
output.append(new SimpleDateFormat("EEEE, MMMM d, yyyy").format(ts));
String day = getNames(WEEKDAYS)[DateTimeUtils.getSundayDayOfWeek(dateValue)];
String month = getNames(MONTHS)[monthOfYear - 1];
output.append(day).append(", ").append(month).append(' ').append(dayOfMonth).append(", ");
StringUtils.appendZeroPadded(output, 4, posYear);
i += 2;
} else if ((cap = containsAt(format, i, "DS")) != null) {
output.append(new SimpleDateFormat("MM/dd/yyyy").format(ts));
StringUtils.appendZeroPadded(output, 2, monthOfYear);
output.append('/');
StringUtils.appendZeroPadded(output, 2, dayOfMonth);
output.append('/');
StringUtils.appendZeroPadded(output, 4, posYear);
i += 2;
} else if ((cap = containsAt(format, i, "TS")) != null) {
output.append(new SimpleDateFormat("h:mm:ss aa").format(ts));
output.append(h12).append(':');
StringUtils.appendZeroPadded(output, 2, minute);
output.append(':');
StringUtils.appendZeroPadded(output, 2, second);
output.append(' ');
output.append(getNames(AM_PM)[isAM ? 0 : 1]);
i += 2;
// Day
} else if ((cap = containsAt(format, i, "DDD")) != null) {
output.append(cal.get(Calendar.DAY_OF_YEAR));
output.append(DateTimeUtils.getDayOfYear(dateValue));
i += 3;
} else if ((cap = containsAt(format, i, "DD")) != null) {
output.append(String.format("%02d",
cal.get(Calendar.DAY_OF_MONTH)));
StringUtils.appendZeroPadded(output, 2, dayOfMonth);
i += 2;
} else if ((cap = containsAt(format, i, "DY")) != null) {
String day = new SimpleDateFormat("EEE").format(ts);
String day = getNames(SHORT_WEEKDAYS)[DateTimeUtils.getSundayDayOfWeek(dateValue)];
output.append(cap.apply(day));
i += 2;
} else if ((cap = containsAt(format, i, "DAY")) != null) {
String day = new SimpleDateFormat("EEEE").format(ts);
String day = getNames(WEEKDAYS)[DateTimeUtils.getSundayDayOfWeek(dateValue)];
if (fillMode) {
day = StringUtils.pad(day, "Wednesday".length(), " ", true);
}
output.append(cap.apply(day));
i += 3;
} else if ((cap = containsAt(format, i, "D")) != null) {
output.append(cal.get(Calendar.DAY_OF_WEEK));
output.append(DateTimeUtils.getSundayDayOfWeek(dateValue));
i += 1;
} else if ((cap = containsAt(format, i, "J")) != null) {
long millis = ts.getTime() - JULIAN_EPOCH;
long days = (long) Math.floor(millis / (1000 * 60 * 60 * 24));
output.append(days);
output.append(DateTimeUtils.absoluteDayFromDateValue(dateValue) - JULIAN_EPOCH);
i += 1;
// Hours
} else if ((cap = containsAt(format, i, "HH24")) != null) {
output.append(new DecimalFormat("00").format(cal.get(Calendar.HOUR_OF_DAY)));
StringUtils.appendZeroPadded(output, 2, hour);
i += 4;
} else if ((cap = containsAt(format, i, "HH12")) != null) {
output.append(new DecimalFormat("00").format(cal.get(Calendar.HOUR)));
StringUtils.appendZeroPadded(output, 2, h12);
i += 4;
} else if ((cap = containsAt(format, i, "HH")) != null) {
output.append(new DecimalFormat("00").format(cal.get(Calendar.HOUR)));
StringUtils.appendZeroPadded(output, 2, h12);
i += 2;
// Minutes
} else if ((cap = containsAt(format, i, "MI")) != null) {
output.append(new DecimalFormat("00").format(cal.get(Calendar.MINUTE)));
StringUtils.appendZeroPadded(output, 2, minute);
i += 2;
// Seconds
} else if ((cap = containsAt(format, i, "SSSSS")) != null) {
int seconds = cal.get(Calendar.HOUR_OF_DAY) * 60 * 60;
seconds += cal.get(Calendar.MINUTE) * 60;
seconds += cal.get(Calendar.SECOND);
int seconds = (int) (timeNanos / 1_000_000_000);
output.append(seconds);
i += 5;
} else if ((cap = containsAt(format, i, "SS")) != null) {
output.append(new DecimalFormat("00").format(cal.get(Calendar.SECOND)));
StringUtils.appendZeroPadded(output, 2, second);
i += 2;
// Fractional seconds
} else if ((cap = containsAt(format, i, "FF1", "FF2",
"FF3", "FF4", "FF5", "FF6", "FF7", "FF8", "FF9")) != null) {
int x = Integer.parseInt(format.substring(i + 2, i + 3));
int ff = (int) (cal.get(Calendar.MILLISECOND) * Math.pow(10, x - 3));
output.append(ff);
int x = format.charAt(i + 2) - '0';
int ff = (int) (nanos * Math.pow(10, x - 9));
StringUtils.appendZeroPadded(output, x, ff);
i += 3;
} else if ((cap = containsAt(format, i, "FF")) != null) {
output.append(cal.get(Calendar.MILLISECOND) * 1000);
StringUtils.appendZeroPadded(output, 9, nanos);
i += 2;
// Time zone
......@@ -732,59 +766,59 @@ public class ToChar {
// Week
} else if ((cap = containsAt(format, i, "IW", "WW")) != null) {
output.append(cal.get(Calendar.WEEK_OF_YEAR));
output.append(DateTimeUtils.getWeekOfYear(dateValue, 0, 1));
i += 2;
} else if ((cap = containsAt(format, i, "W")) != null) {
int w = (int) (1 + Math.floor(cal.get(Calendar.DAY_OF_MONTH) / 7));
int w = 1 + dayOfMonth / 7;
output.append(w);
i += 1;
// Year
} else if ((cap = containsAt(format, i, "Y,YYY")) != null) {
output.append(new DecimalFormat("#,###").format(getYear(cal)));
output.append(new DecimalFormat("#,###").format(posYear));
i += 5;
} else if ((cap = containsAt(format, i, "SYYYY")) != null) {
if (cal.get(Calendar.ERA) == GregorianCalendar.BC) {
// Should be <= 0, but Oracle prints negative years with off-by-one difference
if (year < 0) {
output.append('-');
}
output.append(new DecimalFormat("0000").format(getYear(cal)));
StringUtils.appendZeroPadded(output, 4, posYear);
i += 5;
} else if ((cap = containsAt(format, i, "YYYY", "IYYY", "RRRR")) != null) {
output.append(new DecimalFormat("0000").format(getYear(cal)));
StringUtils.appendZeroPadded(output, 4, posYear);
i += 4;
} else if ((cap = containsAt(format, i, "YYY", "IYY")) != null) {
output.append(new DecimalFormat("000").format(getYear(cal) % 1000));
StringUtils.appendZeroPadded(output, 3, posYear % 1000);
i += 3;
} else if ((cap = containsAt(format, i, "YY", "IY", "RR")) != null) {
output.append(new DecimalFormat("00").format(getYear(cal) % 100));
StringUtils.appendZeroPadded(output, 2, posYear % 100);
i += 2;
} else if ((cap = containsAt(format, i, "I", "Y")) != null) {
output.append(getYear(cal) % 10);
output.append(posYear % 10);
i += 1;
// Month / quarter
} else if ((cap = containsAt(format, i, "MONTH")) != null) {
String month = new SimpleDateFormat("MMMM").format(ts);
String month = getNames(MONTHS)[monthOfYear - 1];
if (fillMode) {
month = StringUtils.pad(month, "September".length(), " ", true);
}
output.append(cap.apply(month));
i += 5;
} else if ((cap = containsAt(format, i, "MON")) != null) {
String month = new SimpleDateFormat("MMM").format(ts);
String month = getNames(SHORT_MONTHS)[monthOfYear - 1];
output.append(cap.apply(month));
i += 3;
} else if ((cap = containsAt(format, i, "MM")) != null) {
output.append(String.format("%02d", cal.get(Calendar.MONTH) + 1));
StringUtils.appendZeroPadded(output, 2, monthOfYear);
i += 2;
} else if ((cap = containsAt(format, i, "RM")) != null) {
int month = cal.get(Calendar.MONTH) + 1;
output.append(cap.apply(toRomanNumeral(month)));
output.append(cap.apply(toRomanNumeral(monthOfYear)));
i += 2;
} else if ((cap = containsAt(format, i, "Q")) != null) {
int q = (int) (1 + Math.floor(cal.get(Calendar.MONTH) / 3));
int q = 1 + ((monthOfYear - 1) / 3);
output.append(q);
i += 1;
......@@ -835,14 +869,6 @@ public class ToChar {
return output.toString();
}
private static int getYear(Calendar cal) {
int year = cal.get(Calendar.YEAR);
if (cal.get(Calendar.ERA) == GregorianCalendar.BC) {
year--;
}
return year;
}
/**
* Returns a capitalization strategy if the specified string contains any of
* the specified substrings at the specified index. The capitalization
......
h2/src/test/org/h2/test/db/TestFunctions.java
浏览文件 @ 621bfd06
......@@ -1453,7 +1453,7 @@ public class TestFunctions extends TestBase implements AggregateFunction {
assertResult("-100-01-15 14:04:02.12", stat, "SELECT X FROM U");
String expected = String.format("%tb", timestamp1979).toUpperCase();
expected = stripTrailingPeriod(expected);
assertResult("12-" + expected + "-79 08.12.34.560000 AM", stat,
assertResult("12-" + expected + "-79 08.12.34.560000000 AM", stat,
"SELECT TO_CHAR(X) FROM T");
assertResult("- / , . ; : text - /", stat,
"SELECT TO_CHAR(X, '- / , . ; : \"text\" - /') FROM T");
......@@ -1492,6 +1492,8 @@ public class TestFunctions extends TestBase implements AggregateFunction {
assertResult("08:12 AM", stat, "SELECT TO_CHAR(X, 'HH:MI PM') FROM T");
assertResult("02:04 PM", stat, "SELECT TO_CHAR(X, 'HH:MI PM') FROM U");
assertResult("08:12 A.M.", stat, "SELECT TO_CHAR(X, 'HH:MI P.M.') FROM T");
assertResult("12 PM", stat, "SELECT TO_CHAR(TIME '12:00:00', 'HH AM')");
assertResult("12 AM", stat, "SELECT TO_CHAR(TIME '00:00:00', 'HH AM')");
assertResult("A.M.", stat, "SELECT TO_CHAR(X, 'P.M.') FROM T");
assertResult("a.m.", stat, "SELECT TO_CHAR(X, 'p.M.') FROM T");
assertResult("a.m.", stat, "SELECT TO_CHAR(X, 'p.m.') FROM T");
......@@ -1532,7 +1534,7 @@ public class TestFunctions extends TestBase implements AggregateFunction {
assertResult(Capitalization.CAPITALIZE.apply(expected), stat, "SELECT TO_CHAR(X, 'Dy') FROM T");
assertResult(expected.toLowerCase(), stat, "SELECT TO_CHAR(X, 'dy') FROM T");
assertResult(expected.toLowerCase(), stat, "SELECT TO_CHAR(X, 'dY') FROM T");
assertResult("08:12:34.560000", stat,
assertResult("08:12:34.560000000", stat,
"SELECT TO_CHAR(X, 'HH:MI:SS.FF') FROM T");
assertResult("08:12:34.5", stat,
"SELECT TO_CHAR(X, 'HH:MI:SS.FF1') FROM T");
......@@ -1552,10 +1554,10 @@ public class TestFunctions extends TestBase implements AggregateFunction {
"SELECT TO_CHAR(X, 'HH:MI:SS.FF8') FROM T");
assertResult("08:12:34.560000000", stat,
"SELECT TO_CHAR(X, 'HH:MI:SS.FF9') FROM T");
assertResult("08:12:34.560000000", stat,
"SELECT TO_CHAR(X, 'HH:MI:SS.ff9') FROM T");
assertResult("08:12:34.560000000", stat,
"SELECT TO_CHAR(X, 'HH:MI:SS.fF9') FROM T");
assertResult("012345678", stat,
"SELECT TO_CHAR(TIME '0:00:00.012345678', 'FF') FROM T");
assertResult("00", stat,
"SELECT TO_CHAR(TIME '0:00:00.000', 'FF2') FROM T");
assertResult("08:12", stat, "SELECT TO_CHAR(X, 'HH:MI') FROM T");
assertResult("08:12", stat, "SELECT TO_CHAR(X, 'HH12:MI') FROM T");
assertResult("08:12", stat, "SELECT TO_CHAR(X, 'HH24:MI') FROM T");
......@@ -1903,7 +1905,8 @@ public class TestFunctions extends TestBase implements AggregateFunction {
final String twoDecimals = "0" + decimalSeparator + "00";
assertResult(oneDecimal, stat, "select to_char(0, 'FM0D099') from dual;");
assertResult(twoDecimals, stat, "select to_char(0., 'FM0D009') from dual;");
assertResult("0.000000000", stat, "select to_char(0.000000000, 'FM0D999999999') from dual;");
assertResult("0" + decimalSeparator + "000000000",
stat, "select to_char(0.000000000, 'FM0D999999999') from dual;");
assertResult("0" + decimalSeparator, stat, "select to_char(0, 'FM0D9') from dual;");
assertResult(oneDecimal, stat, "select to_char(0.0, 'FM0D099') from dual;");
assertResult(twoDecimals, stat, "select to_char(0.00, 'FM0D009') from dual;");
......
h2/src/test/org/h2/test/unit/TestClearReferences.java
浏览文件 @ 621bfd06
......@@ -43,6 +43,7 @@ public class TestClearReferences extends TestBase {
"org.h2.util.JdbcUtils.allowedClassNamePrefixes",
"org.h2.util.JdbcUtils.userClassFactories",
"org.h2.util.Task.counter",
"org.h2.util.ToChar.NAMES",
"org.h2.value.CompareMode.lastUsed",
"org.h2.value.Value.softCache",
};
......
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