/
DateTypeFunctions.java
600 lines (517 loc) · 18.3 KB
/
DateTypeFunctions.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.drill.exec.expr.fn.impl;
import javax.inject.Inject;
import org.apache.drill.exec.expr.DrillSimpleFunc;
import org.apache.drill.exec.expr.annotations.FunctionTemplate;
import org.apache.drill.exec.expr.annotations.FunctionTemplate.NullHandling;
import org.apache.drill.exec.expr.annotations.Output;
import org.apache.drill.exec.expr.annotations.Param;
import org.apache.drill.exec.expr.annotations.Workspace;
import org.apache.drill.exec.expr.holders.BigIntHolder;
import org.apache.drill.exec.expr.holders.BitHolder;
import org.apache.drill.exec.expr.holders.DateHolder;
import org.apache.drill.exec.expr.holders.IntervalDayHolder;
import org.apache.drill.exec.expr.holders.IntervalHolder;
import org.apache.drill.exec.expr.holders.IntervalYearHolder;
import org.apache.drill.exec.expr.holders.NullableVarCharHolder;
import org.apache.drill.exec.expr.holders.TimeHolder;
import org.apache.drill.exec.expr.holders.TimeStampHolder;
import org.apache.drill.exec.expr.holders.VarCharHolder;
import org.apache.drill.exec.ops.ContextInformation;
import org.apache.drill.exec.physical.impl.project.OutputSizeEstimateConstants;
import io.netty.buffer.DrillBuf;
public class DateTypeFunctions {
/**
* Function to check if a varchar value can be cast to a date.
*
* At the time of writing this function, several other databases were checked
* for behavior compatibility. There was not a consensus between oracle and Sql
* server about the expected behavior of this function, and Postgres lacks it
* completely.
*
* Sql Server appears to have both a DATEFORMAT and language locale setting that
* can change the values accepted by this function. Oracle appears to support
* several formats, some of which are not mentioned in the Sql Server docs. With
* the lack of standardization, we decided to implement this function so that it
* would only consider date strings that would be accepted by the cast function
* as valid.
*/
@SuppressWarnings("unused")
@FunctionTemplate(name = "isdate", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.INTERNAL, costCategory = FunctionTemplate.FunctionCostCategory.COMPLEX)
public static class IsDate implements DrillSimpleFunc {
@Param
NullableVarCharHolder in;
@Output
BitHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
// for a null input return false
if (in.isSet == 0) {
out.value = 0;
} else {
out.value = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.isReadableAsDate(in.buffer,
in.start, in.end) ? 1 : 0;
}
}
}
// Same as above, just for required input
@SuppressWarnings("unused")
@FunctionTemplate(name = "isdate", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.INTERNAL, costCategory = FunctionTemplate.FunctionCostCategory.COMPLEX)
public static class IsDateRequiredInput implements DrillSimpleFunc {
@Param
VarCharHolder in;
@Output
BitHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
// for a null input return false
out.value = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers.isReadableAsDate(in.buffer, in.start,
in.end) ? 1 : 0;
}
}
@FunctionTemplate(name = "intervaltype", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class IntervalType implements DrillSimpleFunc {
@Param
BigIntHolder inputYears;
@Param
BigIntHolder inputMonths;
@Param
BigIntHolder inputDays;
@Param
BigIntHolder inputHours;
@Param
BigIntHolder inputMinutes;
@Param
BigIntHolder inputSeconds;
@Param
BigIntHolder inputMilliSeconds;
@Output
IntervalHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
out.months = (int) ((inputYears.value * org.apache.drill.exec.vector.DateUtilities.yearsToMonths)
+ (inputMonths.value));
out.days = (int) inputDays.value;
out.milliseconds = (int) ((inputHours.value * org.apache.drill.exec.vector.DateUtilities.hoursToMillis)
+ (inputMinutes.value * org.apache.drill.exec.vector.DateUtilities.minutesToMillis)
+ (inputSeconds.value * org.apache.drill.exec.vector.DateUtilities.secondsToMillis)
+ (inputMilliSeconds.value));
}
}
@FunctionTemplate(name = "interval_year", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class IntervalYearType implements DrillSimpleFunc {
@Param
BigIntHolder inputYears;
@Param
BigIntHolder inputMonths;
@Output
IntervalYearHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
out.value = (int) ((inputYears.value * org.apache.drill.exec.vector.DateUtilities.yearsToMonths)
+ (inputMonths.value));
}
}
@FunctionTemplate(name = "interval_day", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class IntervalDayType implements DrillSimpleFunc {
@Param
BigIntHolder inputDays;
@Param
BigIntHolder inputHours;
@Param
BigIntHolder inputMinutes;
@Param
BigIntHolder inputSeconds;
@Param
BigIntHolder inputMillis;
@Output
IntervalDayHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
out.days = (int) inputDays.value;
out.milliseconds = (int) ((inputHours.value * org.apache.drill.exec.vector.DateUtilities.hoursToMillis)
+ (inputMinutes.value * org.apache.drill.exec.vector.DateUtilities.minutesToMillis)
+ (inputSeconds.value * org.apache.drill.exec.vector.DateUtilities.secondsToMillis)
+ (inputMillis.value));
}
}
@FunctionTemplate(name = "datetype", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class DateType implements DrillSimpleFunc {
@Param
BigIntHolder inputYears;
@Param
BigIntHolder inputMonths;
@Param
BigIntHolder inputDays;
@Output
DateHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
out.value = ((new org.joda.time.MutableDateTime((int) inputYears.value, (int) inputMonths.value,
(int) inputDays.value, 0, 0, 0, 0, org.joda.time.DateTimeZone.UTC))).getMillis();
}
}
@FunctionTemplate(name = "timestamptype", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class TimeStampType implements DrillSimpleFunc {
@Param
BigIntHolder inputYears;
@Param
BigIntHolder inputMonths;
@Param
BigIntHolder inputDays;
@Param
BigIntHolder inputHours;
@Param
BigIntHolder inputMinutes;
@Param
BigIntHolder inputSeconds;
@Param
BigIntHolder inputMilliSeconds;
@Output
TimeStampHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
out.value = ((new org.joda.time.MutableDateTime((int) inputYears.value, (int) inputMonths.value,
(int) inputDays.value, (int) inputHours.value, (int) inputMinutes.value, (int) inputSeconds.value,
(int) inputMilliSeconds.value, org.joda.time.DateTimeZone.UTC))).getMillis();
}
}
@FunctionTemplate(name = "timetype", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class TimeType implements DrillSimpleFunc {
@Param
BigIntHolder inputHours;
@Param
BigIntHolder inputMinutes;
@Param
BigIntHolder inputSeconds;
@Param
BigIntHolder inputMilliSeconds;
@Output
TimeHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
out.value = (int) ((inputHours.value * org.apache.drill.exec.vector.DateUtilities.hoursToMillis)
+ (inputMinutes.value * org.apache.drill.exec.vector.DateUtilities.minutesToMillis)
+ (inputSeconds.value * org.apache.drill.exec.vector.DateUtilities.secondsToMillis)
+ inputMilliSeconds.value);
}
}
@FunctionTemplate(name = "current_date", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL, isNiladic = true)
public static class CurrentDate implements DrillSimpleFunc {
@Workspace
long queryStartDate;
@Output
DateHolder out;
@Inject
ContextInformation contextInfo;
@Override
public void setup() {
java.time.Instant queryStart = contextInfo.getQueryStartInstant();
java.time.ZonedDateTime lzdt = queryStart.atZone(contextInfo.getRootFragmentTimeZone());
java.time.LocalDate ld = lzdt.truncatedTo(java.time.temporal.ChronoUnit.DAYS).toLocalDate();
queryStartDate = org.apache.drill.exec.vector.DateUtilities.toDrillDate(ld);
}
@Override
public void eval() {
out.value = queryStartDate;
}
}
@FunctionTemplate(name = "timeofday", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL, isRandom = true, outputSizeEstimate = OutputSizeEstimateConstants.DATE_TIME_LENGTH)
public static class TimeOfDay implements DrillSimpleFunc {
@Inject
DrillBuf buffer;
@Output
VarCharHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
java.time.ZonedDateTime temp = java.time.ZonedDateTime.now();
String str = org.apache.drill.exec.expr.fn.impl.DateUtility.formatTimeStampTZ.format(temp);
out.buffer = buffer;
out.start = 0;
out.end = Math.min(100, str.length()); // truncate if target type has length smaller than that of input's
// string
out.buffer.setBytes(0, str.substring(0, out.end).getBytes(java.nio.charset.StandardCharsets.UTF_8));
}
}
/*
* Return query start time in milliseconds
*/
public static long getQueryStartDate(ContextInformation contextInfo) {
org.joda.time.DateTime now = (new org.joda.time.DateTime(contextInfo.getQueryStartTime()))
.withZoneRetainFields(org.joda.time.DateTimeZone.UTC);
return now.getMillis();
}
/*
* Niladic version of LocalTimeStamp
*/
@FunctionTemplate(names = { "localtimestamp",
"current_timestamp" }, scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL, isNiladic = true)
public static class LocalTimeStampNiladic implements DrillSimpleFunc {
@Workspace
long queryStartDate;
@Output
TimeStampHolder out;
@Inject
ContextInformation contextInfo;
@Override
public void setup() {
queryStartDate = org.apache.drill.exec.expr.fn.impl.DateTypeFunctions.getQueryStartDate(contextInfo);
}
@Override
public void eval() {
out.value = queryStartDate;
}
}
/*
* Non-Niladic version of LocalTimeStamp
*/
@FunctionTemplate(names = { "now", "statement_timestamp",
"transaction_timestamp" }, scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class LocalTimeStampNonNiladic implements DrillSimpleFunc {
@Workspace
long queryStartDate;
@Output
TimeStampHolder out;
@Inject
ContextInformation contextInfo;
@Override
public void setup() {
queryStartDate = org.apache.drill.exec.expr.fn.impl.DateTypeFunctions.getQueryStartDate(contextInfo);
}
@Override
public void eval() {
out.value = queryStartDate;
}
}
@FunctionTemplate(names = { "current_time",
"localtime" }, scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL, isNiladic = true)
public static class CurrentTime implements DrillSimpleFunc {
@Workspace
int queryStartTime;
@Output
TimeHolder out;
@Inject
ContextInformation contextInfo;
@Override
public void setup() {
java.time.Instant queryStart = contextInfo.getQueryStartInstant();
java.time.ZonedDateTime lzdt = queryStart.atZone(contextInfo.getRootFragmentTimeZone());
queryStartTime = org.apache.drill.exec.vector.DateUtilities.toDrillTime(lzdt.toLocalTime());
}
@Override
public void eval() {
out.value = queryStartTime;
}
}
@SuppressWarnings("unused")
@FunctionTemplate(names = { "date_add",
"add" }, scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class DateTimeAddFunction implements DrillSimpleFunc {
@Param
DateHolder left;
@Param
TimeHolder right;
@Output
TimeStampHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
out.value = left.value + right.value;
}
}
@SuppressWarnings("unused")
@FunctionTemplate(names = { "date_add",
"add" }, scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class TimeDateAddFunction implements DrillSimpleFunc {
@Param
TimeHolder right;
@Param
DateHolder left;
@Output
TimeStampHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
out.value = left.value + right.value;
}
}
/*
* Dummy function template to allow Optiq to validate this function call. At
* DrillOptiq time we rewrite all date_part() functions to extract functions,
* since they are essentially the same
*/
@SuppressWarnings("unused")
@FunctionTemplate(names = "date_part", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class DatePartFunction implements DrillSimpleFunc {
@Param
VarCharHolder left;
@Param
DateHolder right;
@Output
BigIntHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
// TODO: We should fix this so that the function is rewritten for the user rather than
// throwing an exception. This is poor design.
throw new UnsupportedOperationException(
"date_part function should be rewritten as extract() functions");
}
}
@FunctionTemplate(name = "castTIME", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class CastTimeStampToTime implements DrillSimpleFunc {
@Param
TimeStampHolder in;
@Output
TimeHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
out.value = (int) (in.value % org.apache.drill.exec.vector.DateUtilities.daysToStandardMillis);
}
}
@FunctionTemplate(name = "castTIMESTAMP", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class CastTimeToTimeStamp implements DrillSimpleFunc {
@Param
TimeHolder in;
@Output
TimeStampHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
out.value = in.value;
}
}
@FunctionTemplate(name = "castTIME", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class CastDateToTime implements DrillSimpleFunc {
@Param
DateHolder in;
@Output
TimeHolder out;
@Override
public void setup() {
}
@Override
public void eval() {
out.value = 0;
}
}
@FunctionTemplate(name = "unix_timestamp", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class UnixTimeStamp implements DrillSimpleFunc {
@Output
BigIntHolder out;
@Workspace
long queryStartDate;
@Inject
ContextInformation contextInfo;
@Override
public void setup() {
queryStartDate = contextInfo.getQueryStartTime();
}
@Override
public void eval() {
out.value = queryStartDate / 1000;
}
}
@FunctionTemplate(name = "unix_timestamp", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class UnixTimeStampForDate implements DrillSimpleFunc {
@Param
VarCharHolder inputDateValue;
@Output
BigIntHolder out;
@Workspace
org.joda.time.DateTime date;
@Workspace
org.joda.time.format.DateTimeFormatter formatter;
@Override
public void setup() {
formatter = org.joda.time.format.DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss");
}
@Override
public void eval() {
String inputDate = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers
.toStringFromUTF8(inputDateValue.start, inputDateValue.end, inputDateValue.buffer);
date = formatter.parseDateTime(inputDate);
out.value = date.getMillis() / 1000;
}
}
@FunctionTemplate(name = "unix_timestamp", scope = FunctionTemplate.FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
public static class UnixTimeStampForDateWithPattern implements DrillSimpleFunc {
@Param
VarCharHolder inputDateValue;
@Param
VarCharHolder inputPattern;
@Output
BigIntHolder out;
@Workspace
org.joda.time.DateTime date;
@Workspace
org.joda.time.format.DateTimeFormatter formatter;
@Override
public void setup() {
String pattern = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers
.toStringFromUTF8(inputPattern.start, inputPattern.end, inputPattern.buffer);
formatter = org.joda.time.format.DateTimeFormat.forPattern(pattern);
}
@Override
public void eval() {
String inputDate = org.apache.drill.exec.expr.fn.impl.StringFunctionHelpers
.toStringFromUTF8(inputDateValue.start, inputDateValue.end, inputDateValue.buffer);
date = formatter.parseDateTime(inputDate);
out.value = date.getMillis() / 1000;
}
}
}