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[Enhancement] Simplify date/datetime column predicate in certain cases (
StarRocks#50643) Signed-off-by: kaijian.ding <[email protected]> Signed-off-by: zhiminr.ren <[email protected]>
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...in/java/com/starrocks/sql/optimizer/rewrite/scalar/SimplifiedDateColumnPredicateRule.java
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| // Copyright 2021-present StarRocks, Inc. All rights reserved. | ||
| // | ||
| // Licensed 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 | ||
| // | ||
| // https://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. | ||
|
|
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| package com.starrocks.sql.optimizer.rewrite.scalar; | ||
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| import com.google.common.collect.ImmutableList; | ||
| import com.starrocks.analysis.BinaryType; | ||
| import com.starrocks.analysis.Expr; | ||
| import com.starrocks.catalog.Function; | ||
| import com.starrocks.catalog.FunctionSet; | ||
| import com.starrocks.catalog.PrimitiveType; | ||
| import com.starrocks.catalog.Type; | ||
| import com.starrocks.sql.optimizer.operator.scalar.BinaryPredicateOperator; | ||
| import com.starrocks.sql.optimizer.operator.scalar.CallOperator; | ||
| import com.starrocks.sql.optimizer.operator.scalar.CastOperator; | ||
| import com.starrocks.sql.optimizer.operator.scalar.ConstantOperator; | ||
| import com.starrocks.sql.optimizer.operator.scalar.ScalarOperator; | ||
| import com.starrocks.sql.optimizer.rewrite.ScalarOperatorFunctions; | ||
| import com.starrocks.sql.optimizer.rewrite.ScalarOperatorRewriteContext; | ||
|
|
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| import java.time.DateTimeException; | ||
| import java.util.regex.Pattern; | ||
|
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| /** | ||
| * if t is date | ||
| * date_format(t, '%Y%m%d') >= '20230327' -> `t` >= '20230327' | ||
| * date_format(t, '%Y-%m-%d') >= '2023-03-27' -> `t` >= '2023-03-27' | ||
| * substr(cast(t as varchar), 1, 10) >= '2023-03-27' -> `t` >= '2023-03-27' | ||
| * substring(cast(t as varchar), 1, 10) >= '2023-03-27' -> `t` >= '2023-03-27' | ||
| * replace(substring(cast(t as varchar), 1, 10), "-", "") >= '20230327' -> `t` >= '20230327' | ||
| * | ||
| * if it is datetime | ||
| * date_format(t, '%Y-%m-%d') >/>=/< '2023-03-27' -> t >/>=/< '2023-03-27' | ||
| * date_format(t, '%Y-%m-%d') <= '2023-03-27' -> t < days_add('2023-03-27', 1) | ||
| */ | ||
| public class SimplifiedDateColumnPredicateRule extends BottomUpScalarOperatorRewriteRule { | ||
| private static final String DATE_PATTERN1 = "%Y%m%d"; | ||
| private static final String DATE_PATTERN2 = "%Y-%m-%d"; | ||
| private static final Pattern DATE_PATTERN_REG = Pattern.compile("\\d{8}"); | ||
| private static final Pattern DATE_PATTERN_REG2 = Pattern.compile("\\d{4}-\\d{2}-\\d{2}"); | ||
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| @Override | ||
| public ScalarOperator visitBinaryPredicate(BinaryPredicateOperator predicate, | ||
| ScalarOperatorRewriteContext context) { | ||
| ScalarOperator op = predicate.getChild(0); | ||
| if (!(op instanceof CallOperator)) { | ||
| return predicate; | ||
| } | ||
| ScalarOperator right = predicate.getChild(1); | ||
| if (!(right instanceof ConstantOperator)) { | ||
| return predicate; | ||
| } | ||
| ScalarOperator columnRef = null; | ||
| Extractor extractor = newExtractor((CallOperator) op, (ConstantOperator) right); | ||
| if (extractor != null && extractor.check()) { | ||
| columnRef = extractor.extractColumn(); | ||
| } | ||
| if (columnRef == null) { | ||
| return predicate; | ||
| } | ||
| BinaryType binaryType = predicate.getBinaryType(); | ||
| if (columnRef.getType().getPrimitiveType() == PrimitiveType.DATE) { | ||
| return new BinaryPredicateOperator(binaryType, columnRef, right); | ||
| } | ||
| // if t is datetime, | ||
| if (columnRef.getType().getPrimitiveType() == PrimitiveType.DATETIME) { | ||
| // date_format(t, '%Y-%m-%d') >/>=/< '2023-03-27' -> t >/>=/< '2023-03-27' | ||
| if (binaryType == BinaryType.GT || binaryType == BinaryType.GE || binaryType == BinaryType.LT) { | ||
| return new BinaryPredicateOperator(binaryType, columnRef, right); | ||
| } | ||
| // date_format(t, '%Y-%m-%d') <= '2023-03-27' -> t < days_add('2023-03-27', 1) | ||
| if (binaryType == BinaryType.LE) { | ||
| Function daysAddFn = Expr.getBuiltinFunction(FunctionSet.DAYS_ADD, | ||
| new Type[] {Type.DATETIME, Type.INT}, Function.CompareMode.IS_IDENTICAL); | ||
| return new BinaryPredicateOperator(BinaryType.LT, columnRef, new CallOperator( | ||
| FunctionSet.DAYS_ADD, Type.DATETIME, | ||
| ImmutableList.of(right, ConstantOperator.createInt(1)), daysAddFn)); | ||
| } | ||
| } | ||
| return predicate; | ||
| } | ||
|
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| private static boolean isSubstrFn(CallOperator call) { | ||
| return FunctionSet.SUBSTR.equalsIgnoreCase(call.getFnName()) | ||
| || FunctionSet.SUBSTRING.equalsIgnoreCase(call.getFnName()); | ||
| } | ||
|
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| private Extractor newExtractor(CallOperator call, ConstantOperator value) { | ||
| if (FunctionSet.DATE_FORMAT.equalsIgnoreCase(call.getFnName())) { | ||
| return new DateFormatExtractor(call, value); | ||
| } else if (isSubstrFn(call)) { | ||
| return new SubstrExtractor(call, value, DATE_PATTERN2); | ||
| } else if (FunctionSet.REPLACE.equalsIgnoreCase(call.getFnName())) { | ||
| return new ReplaceAndSubstrExtractor(call, value); | ||
| } | ||
| return null; | ||
| } | ||
|
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| private static boolean isDatePattern(String datePattern, ConstantOperator date) { | ||
| if (DATE_PATTERN1.equalsIgnoreCase(datePattern) && DATE_PATTERN_REG.matcher(date.getVarchar()).matches()) { | ||
| return verifyDate(datePattern, date); | ||
| } | ||
| if (DATE_PATTERN2.equalsIgnoreCase(datePattern) && DATE_PATTERN_REG2.matcher(date.getVarchar()).matches()) { | ||
| return verifyDate(datePattern, date); | ||
| } | ||
| return false; | ||
| } | ||
|
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| private static boolean verifyDate(String datePattern, ConstantOperator date) { | ||
| try { | ||
| ScalarOperatorFunctions.str2Date(date, ConstantOperator.createVarchar(datePattern)); | ||
| } catch (DateTimeException ignore) { | ||
| return false; | ||
| } | ||
| return true; | ||
| } | ||
|
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| private interface Extractor { | ||
| ScalarOperator extractColumn(); | ||
|
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| boolean check(); | ||
| } | ||
|
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| /** | ||
| * date_format(t, '%Y%m%d') -> t | ||
| */ | ||
| private static class DateFormatExtractor implements Extractor { | ||
| private final CallOperator call; | ||
| private final ConstantOperator value; | ||
|
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| public DateFormatExtractor(CallOperator call, ConstantOperator value) { | ||
| this.call = call; | ||
| this.value = value; | ||
| } | ||
|
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| @Override | ||
| public boolean check() { | ||
| if (!call.getChild(1).isConstantRef()) { | ||
| return false; | ||
| } | ||
| ScalarOperator dateColumn = call.getChild(0); | ||
| return dateColumn.getType().getPrimitiveType() == PrimitiveType.DATE | ||
| || dateColumn.getType().getPrimitiveType() == PrimitiveType.DATETIME; | ||
| } | ||
|
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| @Override | ||
| public ScalarOperator extractColumn() { | ||
| ScalarOperator dateColumn = call.getChild(0); | ||
| String pattern = ((ConstantOperator) call.getChild(1)).getVarchar(); | ||
| if (isDatePattern(pattern, value)) { | ||
| return dateColumn; | ||
| } | ||
| return null; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * substr(cast(t as varchar), 1, 10) -> t | ||
| */ | ||
| private static class SubstrExtractor implements Extractor { | ||
| private final CallOperator call; | ||
| private final ConstantOperator value; | ||
| private final String datePattern; | ||
|
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| public SubstrExtractor(CallOperator call, ConstantOperator value, String datePattern) { | ||
| this.call = call; | ||
| this.value = value; | ||
| this.datePattern = datePattern; | ||
| } | ||
|
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||
| @Override | ||
| public boolean check() { | ||
| if (!(call.getChild(1).isConstantRef() && ((ConstantOperator) call.getChild(1)).getInt() == 1) | ||
| || !(call.getChild(2).isConstantRef() && ((ConstantOperator) call.getChild(2)).getInt() == 10)) { | ||
| return false; | ||
| } | ||
| if (!(call.getChild(0) instanceof CastOperator)) { | ||
| return false; | ||
| } | ||
| CastOperator op = call.getChild(0).cast(); | ||
| return op.getChild(0).getType().getPrimitiveType() == PrimitiveType.DATE | ||
| || op.getChild(0).getType().getPrimitiveType() == PrimitiveType.DATETIME; | ||
| } | ||
|
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| @Override | ||
| public ScalarOperator extractColumn() { | ||
| CastOperator castOperator = call.getChild(0).cast(); | ||
| ScalarOperator dateColumn = castOperator.getChild(0); | ||
| if (isDatePattern(datePattern, value)) { | ||
| return dateColumn; | ||
| } | ||
| return null; | ||
| } | ||
| } | ||
|
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| /** | ||
| * replace(substring(cast(t as varchar), 1, 10), "-", "") -> t | ||
| */ | ||
| private static class ReplaceAndSubstrExtractor implements Extractor { | ||
| private final CallOperator call; | ||
| private final ConstantOperator value; | ||
|
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| public ReplaceAndSubstrExtractor(CallOperator call, ConstantOperator value) { | ||
| this.call = call; | ||
| this.value = value; | ||
| } | ||
|
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| @Override | ||
| public boolean check() { | ||
| if (!(call.getChild(0) instanceof CallOperator && isSubstrFn((CallOperator) call.getChild(0)))) { | ||
| return false; | ||
| } | ||
| if (!call.getChild(1).isConstantRef() || !((ConstantOperator) call.getChild(1)).getVarchar().equals("-")) { | ||
| return false; | ||
| } | ||
| if (!call.getChild(2).isConstantRef() || !((ConstantOperator) call.getChild(2)).getVarchar().isEmpty()) { | ||
| return false; | ||
| } | ||
| // yyyyMMdd | ||
| if (value.getVarchar().length() != 8) { | ||
| return false; | ||
| } | ||
| return new SubstrExtractor((CallOperator) call.getChild(0), value, DATE_PATTERN1).check(); | ||
| } | ||
|
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| @Override | ||
| public ScalarOperator extractColumn() { | ||
| return new SubstrExtractor((CallOperator) call.getChild(0), value, DATE_PATTERN1).extractColumn(); | ||
| } | ||
| } | ||
| } |
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