Jackie-Jiang commented on code in PR #19986:
URL: https://github.com/apache/pinot/pull/19986#discussion_r4340513314
##########
pinot-segment-spi/src/main/java/org/apache/pinot/segment/spi/AggregationFunctionType.java:
##########
@@ -426,6 +427,43 @@ public static AggregationFunctionType
getAggregationFunctionType(String function
}
}
+ /// Accepts `(dataColumn, timeColumn)` and `(dataColumn, timeColumn,
'dataType')`. The two-argument form is limited to
+ /// the types of the explicit form, since its data type argument is inferred
from the data argument.
+ private static class ValueWithTimeOperandTypeChecker implements
SqlOperandTypeChecker {
+ private static final SqlOperandTypeChecker DELEGATE = OperandTypes.or(
+ OperandTypes.family(SqlTypeFamily.ANY, SqlTypeFamily.ANY),
+ OperandTypes.family(SqlTypeFamily.ANY, SqlTypeFamily.ANY,
SqlTypeFamily.CHARACTER));
+ private static final Set<SqlTypeName> INFERRED_DATA_TYPES =
Set.of(SqlTypeName.TINYINT, SqlTypeName.SMALLINT,
Review Comment:
Do we need this check? All supported types should allow inferring
##########
pinot-query-planner/src/main/java/org/apache/pinot/calcite/rel/rules/PinotAggregateTypeArgumentRewriteRule.java:
##########
@@ -0,0 +1,170 @@
+/**
+ * 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.pinot.calcite.rel.rules;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import javax.annotation.Nullable;
+import org.apache.calcite.plan.RelOptRule;
+import org.apache.calcite.plan.RelOptRuleCall;
+import org.apache.calcite.rel.RelNode;
+import org.apache.calcite.rel.core.Aggregate;
+import org.apache.calcite.rel.core.AggregateCall;
+import org.apache.calcite.rel.core.Project;
+import org.apache.calcite.rel.hint.RelHint;
+import org.apache.calcite.rel.logical.LogicalAggregate;
+import org.apache.calcite.rel.logical.LogicalProject;
+import org.apache.calcite.rex.RexBuilder;
+import org.apache.calcite.rex.RexNode;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.apache.calcite.tools.RelBuilderFactory;
+import org.apache.pinot.segment.spi.AggregationFunctionType;
+
+
+/// Supplies the explicit data type argument from the type of the data
argument:
+/// - FIRST_WITH_TIME(dataColumn, timeColumn) -> FIRST_WITH_TIME(dataColumn,
timeColumn, 'dataType')
+/// - LAST_WITH_TIME(dataColumn, timeColumn) -> LAST_WITH_TIME(dataColumn,
timeColumn, 'dataType')
+///
+/// The result type of the call is unchanged. The literal is projected
directly beneath the aggregate, appended to the
+/// existing project when there is one, because
[PinotAggregateExchangeNodeInsertRule] and `AggregatePushdownRule`
+/// inline literal arguments only from the immediate project.
+///
+/// The servers require the data type argument, so the rule is required rather
than an optimization: `QueryEnvironment`
+/// always applies it, and `skipPlannerRules` cannot turn it off.
+public class PinotAggregateTypeArgumentRewriteRule extends RelOptRule {
+ public static final PinotAggregateTypeArgumentRewriteRule INSTANCE =
+ new
PinotAggregateTypeArgumentRewriteRule(PinotRuleUtils.PINOT_REL_FACTORY);
+
+ // Matches with RelOptRule operands, like the other aggregate rewrite rules,
instead of a RelRule config.
+ @SuppressWarnings("deprecation")
+ private PinotAggregateTypeArgumentRewriteRule(RelBuilderFactory factory) {
+ super(operand(LogicalAggregate.class, any()), factory, null);
+ }
+
+ @Override
+ public boolean matches(RelOptRuleCall call) {
+ // Requiring a call without its data type is also what makes the rule
terminate.
+ Aggregate aggRel = call.rel(0);
+ RelNode input = aggRel.getInput();
+ return aggRel.getAggCallList().stream().anyMatch(aggCall ->
getDataTypeArgument(aggCall, input) != null);
+ }
+
+ @Override
+ public void onMatch(RelOptRuleCall call) {
+ Aggregate aggRel = call.rel(0);
+ RelNode input = aggRel.getInput();
+ RelNode unboxedInput = PinotRuleUtils.unboxRel(input);
+ RexBuilder rexBuilder = aggRel.getCluster().getRexBuilder();
+
+ List<RexNode> projects;
+ RelNode projectInput;
+ List<RelHint> hints;
+ if (unboxedInput instanceof Project) {
+ Project project = (Project) unboxedInput;
+ projects = new ArrayList<>(project.getProjects());
+ projectInput = project.getInput();
+ hints = project.getHints();
+ } else {
+ int numFields = input.getRowType().getFieldCount();
+ projects = new ArrayList<>(numFields + 1);
+ for (int i = 0; i < numFields; i++) {
+ projects.add(rexBuilder.makeInputRef(input, i));
+ }
+ projectInput = input;
+ hints = List.of();
+ }
+
+ // Appending keeps the existing field indexes, so the group set and the
other calls are unaffected.
+ List<AggregateCall> orgAggCalls = aggRel.getAggCallList();
+ int numAggCalls = orgAggCalls.size();
+ int[] literalIndexes = new int[numAggCalls];
+ Map<String, Integer> literalIndexByDataType = new HashMap<>();
+ for (int i = 0; i < numAggCalls; i++) {
+ String dataType = getDataTypeArgument(orgAggCalls.get(i), input);
+ literalIndexes[i] = dataType == null ? -1 :
literalIndexByDataType.computeIfAbsent(dataType, type -> {
+ projects.add(rexBuilder.makeLiteral(type));
+ return projects.size() - 1;
+ });
+ }
+ RelNode newInput = LogicalProject.create(projectInput, hints, projects,
(List<String>) null, Set.of());
+
+ List<AggregateCall> aggCalls = new ArrayList<>(numAggCalls);
+ for (int i = 0; i < numAggCalls; i++) {
+ AggregateCall aggCall = orgAggCalls.get(i);
+ if (literalIndexes[i] < 0) {
+ aggCalls.add(aggCall);
+ continue;
+ }
+ List<Integer> argList = new ArrayList<>(aggCall.getArgList());
+ argList.add(literalIndexes[i]);
+ // Keeps the original result type, so the rewrite does not change the
result schema.
+ aggCalls.add(aggCall.withArgList(argList));
+ }
+ call.transformTo(
+ aggRel.copy(aggRel.getTraitSet(), newInput, aggRel.getGroupSet(),
aggRel.getGroupSets(), aggCalls));
+ }
+
+ /// Returns the data type argument to append, or `null` when the call
already has one or is not such a call.
+ @Nullable
+ private static String getDataTypeArgument(AggregateCall aggCall, RelNode
input) {
+ if (aggCall.getArgList().size() != 2) {
+ return null;
+ }
+ String name =
AggregationFunctionType.getNormalizedAggregationFunctionName(aggCall.getAggregation().getName());
+ if (!name.equals(AggregationFunctionType.FIRSTWITHTIME.name())
+ && !name.equals(AggregationFunctionType.LASTWITHTIME.name())) {
+ return null;
+ }
+ SqlTypeName dataType =
+
input.getRowType().getFieldList().get(aggCall.getArgList().get(0)).getType().getSqlTypeName();
+ switch (dataType) {
+ case TINYINT:
+ case SMALLINT:
+ case INTEGER:
+ return "INT";
+ case BIGINT:
+ return "LONG";
+ case REAL:
+ case FLOAT:
+ return "FLOAT";
+ case DOUBLE:
+ return "DOUBLE";
+ case DECIMAL:
+ return "BIG_DECIMAL";
+ case CHAR:
+ case VARCHAR:
+ return "STRING";
+ case BOOLEAN:
+ return "BOOLEAN";
+ case TIMESTAMP:
+ return "TIMESTAMP";
+ case BINARY:
+ case VARBINARY:
+ return "BYTES";
+ case UUID:
+ return "UUID";
+ default:
+ // Rejected during validation; leave the call as it is rather than
guess a type.
+ return null;
Review Comment:
Consider throwing exception here
##########
pinot-core/src/main/java/org/apache/pinot/core/query/optimizer/statement/AggregateFunctionRewriteOptimizer.java:
##########
@@ -46,62 +53,83 @@ public void optimize(PinotQuery pinotQuery, @Nullable
Schema schema) {
return;
}
- // Only perform auto rewrite when enabled through query option.
- if (pinotQuery.getQueryOptions() == null ||
!Boolean.parseBoolean(pinotQuery.getQueryOptions().get(
-
CommonConstants.Broker.Request.QueryOptionKey.AUTO_REWRITE_AGGREGATION_TYPE))) {
- return;
- }
-
- List<Expression> selectList = pinotQuery.getSelectList();
- if (selectList != null) {
- for (Expression expression : selectList) {
- maybeRewriteAggregateFunction(expression, schema);
- }
- }
-
- List<Expression> groupByList = pinotQuery.getGroupByList();
- if (groupByList != null) {
- for (Expression expression : groupByList) {
- maybeRewriteAggregateFunction(expression, schema);
- }
- }
+ boolean rewriteToTypedVariants = pinotQuery.getQueryOptions() != null &&
Boolean.parseBoolean(
+
pinotQuery.getQueryOptions().get(CommonConstants.Broker.Request.QueryOptionKey.AUTO_REWRITE_AGGREGATION_TYPE));
+ rewrite(pinotQuery.getSelectList(), schema, rewriteToTypedVariants);
+ rewrite(pinotQuery.getGroupByList(), schema, rewriteToTypedVariants);
+ rewrite(pinotQuery.getOrderByList(), schema, rewriteToTypedVariants);
+ rewrite(pinotQuery.getFilterExpression(), schema, rewriteToTypedVariants);
+ rewrite(pinotQuery.getHavingExpression(), schema, rewriteToTypedVariants);
+ }
- List<Expression> orderByList = pinotQuery.getOrderByList();
- if (orderByList != null) {
- for (Expression expression : orderByList) {
- maybeRewriteAggregateFunction(expression, schema);
+ private static void rewrite(@Nullable List<Expression> expressions, Schema
schema, boolean rewriteToTypedVariants) {
+ if (expressions != null) {
+ for (Expression expression : expressions) {
+ rewrite(expression, schema, rewriteToTypedVariants);
}
}
-
- maybeRewriteAggregateFunction(pinotQuery.getFilterExpression(), schema);
- maybeRewriteAggregateFunction(pinotQuery.getHavingExpression(), schema);
}
- private void maybeRewriteAggregateFunction(@Nullable Expression expression,
Schema schema) {
+ private static void rewrite(@Nullable Expression expression, Schema schema,
boolean rewriteToTypedVariants) {
if (expression == null || !expression.isSetFunctionCall()) {
return;
}
Function function = expression.getFunctionCall();
String functionName = function.getOperator();
if (!AggregationFunctionType.isAggregationFunction(functionName)) {
+ rewrite(function.getOperands(), schema, rewriteToTypedVariants);
return;
}
- Expression operand = function.getOperands().get(0);
- FieldSpec.DataType operandType;
// TODO: Handle more complex expressions (e.g. MIN(trim(stringCol)) )
- if (operand.isSetIdentifier()) {
- String columnName = operand.getIdentifier().getName();
- FieldSpec fieldSpec = schema.getFieldSpecFor(columnName);
- if (fieldSpec == null) {
- return;
- }
- operandType = fieldSpec.getDataType().getStoredType();
- } else {
+ if (function.getOperandsSize() == 0 ||
!function.getOperands().get(0).isSetIdentifier()) {
return;
}
+ FieldSpec fieldSpec =
schema.getFieldSpecFor(function.getOperands().get(0).getIdentifier().getName());
+ if (fieldSpec == null) {
+ return;
+ }
+
+ String normalizedName =
AggregationFunctionType.getNormalizedAggregationFunctionName(functionName);
+ if ((normalizedName.equals(AggregationFunctionType.FIRSTWITHTIME.name())
+ || normalizedName.equals(AggregationFunctionType.LASTWITHTIME.name()))
&& function.getOperandsSize() == 2) {
+ addDataTypeArgument(function, fieldSpec);
+ return;
+ }
+ if (rewriteToTypedVariants) {
+ rewriteToTypedVariant(function, functionName,
fieldSpec.getDataType().getStoredType());
+ }
+ }
+
+ /// Appends the data column's logical type.
+ private static void addDataTypeArgument(Function function, FieldSpec
fieldSpec) {
+ if (!fieldSpec.isSingleValueField()) {
+ return;
+ }
+ switch (fieldSpec.getDataType()) {
+ case INT:
+ case LONG:
+ case FLOAT:
+ case DOUBLE:
+ case BIG_DECIMAL:
+ case STRING:
+ case BOOLEAN:
+ case TIMESTAMP:
+ case BYTES:
+ case UUID:
+
function.addToOperands(RequestUtils.getLiteralExpression(fieldSpec.getDataType().name()));
+ break;
+ case JSON:
+ // Same as the multi-stage engine, which types a JSON column as
VARCHAR.
+
function.addToOperands(RequestUtils.getLiteralExpression(FieldSpec.DataType.STRING.name()));
+ break;
+ default:
+ break;
Review Comment:
Consider throwing exception here
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