cloud-fan commented on code in PR #57264:
URL: https://github.com/apache/spark/pull/57264#discussion_r3591859448
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala:
##########
@@ -2621,7 +2624,287 @@ object AsOfJoin {
usingColumns = usingColumns,
matchLeftOperand = Some(leftExpr),
matchOperator = Some(operator),
- matchRightOperand = Some(rightExpr))
+ matchRightOperand = Some(rightExpr),
+ requiresSortMergeAsOfJoin = true)
+ }
+
+ def resolveMatchComparison(
Review Comment:
`resolveMatchComparison` has no callers now — `ResolveAsOfJoin` calls
`normalizeMatchOperands` and `materializeMatchComparison` directly, and there's
no other caller in the tree. Drop it, unless it's meant as the DataFrame-path
entry point for the follow-up, in which case wire that up so it isn't dead.
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveAsOfJoin.scala:
##########
@@ -0,0 +1,253 @@
+/*
+ * 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.spark.sql.catalyst.analysis
+
+import org.apache.spark.sql.catalyst.SQLConfHelper
+import org.apache.spark.sql.catalyst.expressions.{
+ Expression,
+ RowOrdering,
+ SubqueryExpression,
+ WindowExpression
+}
+import org.apache.spark.sql.catalyst.expressions.AttributeSet
+import org.apache.spark.sql.catalyst.expressions.aggregate.AggregateExpression
+import org.apache.spark.sql.catalyst.plans.logical.{AsOfJoin, LogicalPlan,
Project}
+import org.apache.spark.sql.catalyst.rules.Rule
+import org.apache.spark.sql.catalyst.trees.TreePattern.{AS_OF_JOIN, GENERATOR}
+import org.apache.spark.sql.catalyst.util._
+import org.apache.spark.sql.errors.QueryErrorsBase
+import org.apache.spark.sql.types.{
+ ArrayType,
+ CalendarIntervalType,
+ DataType,
+ DatetimeType,
+ DateType,
+ DayTimeIntervalType,
+ NumericType,
+ StringType,
+ StructType,
+ TimestampNTZType,
+ TimestampType,
+ YearMonthIntervalType
+}
+
+/**
+ * Resolves SQL [[AsOfJoin]] operators: materializes `MATCH_CONDITION` into
`asOfCondition` and
+ * `orderExpression`, and expands `USING` column lists into equi-join
predicates.
+ */
+object ResolveAsOfJoin extends Rule[LogicalPlan] with SQLConfHelper {
+
+ override def apply(plan: LogicalPlan): LogicalPlan =
plan.resolveOperatorsUpWithPruning(
+ _.containsPattern(AS_OF_JOIN), ruleId) {
+ case j @ AsOfJoin(
+ left,
+ right,
+ _,
+ condition,
+ _,
+ _,
+ _,
+ usingColumns,
+ matchLeft,
+ matchOp,
+ matchRight,
+ _,
+ _,
+ _)
+ if left.resolved && right.resolved && condition.forall(_.resolved) =>
+ val (joinBase, usingProjection) = usingColumns match {
+ case Some(cols) if condition.isEmpty =>
+ val (projectList, hiddenList, newCondition) =
+ NaturalAndUsingJoinResolution.computeJoinOutputsAndNewCondition(
+ left,
+ left.output,
+ right,
+ right.output,
+ j.joinType,
+ cols,
+ None,
+ (l, r) => conf.resolver(l, r))
+ (j.copy(condition = newCondition, usingColumns = None),
Some((projectList, hiddenList)))
+ case _ => (j, None)
+ }
+ val resolvedJoin = (matchLeft, matchOp, matchRight) match {
+ case (Some(leftExpr), Some(operator), Some(rightExpr)) =>
+ AsOfJoinValidation.validateMatchConditionTableReferences(
+ joinBase, left, right, leftExpr, rightExpr)
+ if (leftExpr.resolved && rightExpr.resolved) {
+ AsOfJoinValidation.validateMatchConditionOperands(joinBase,
leftExpr, rightExpr)
+ val (leftOperand, rightOperand, normalizedOp) =
+ AsOfJoin.normalizeMatchOperands(left, right, leftExpr, operator,
rightExpr)
+ AsOfJoinValidation.validateMatchConditionPlannerSupport(
+ joinBase, leftOperand, rightOperand)
+ val (asOfCondition, orderExpression, leftSortExprs,
rightSortExprs) =
+ AsOfJoin.materializeMatchComparison(leftOperand, rightOperand,
normalizedOp)
+ joinBase.copy(
+ asOfCondition = asOfCondition,
+ orderExpression = orderExpression,
+ leftSortExprs = leftSortExprs,
+ rightSortExprs = rightSortExprs,
+ matchLeftOperand = None,
+ matchOperator = None,
+ matchRightOperand = None)
+ } else {
+ joinBase
+ }
+ case (None, None, None) => joinBase
+ case _ => joinBase
+ }
+ usingProjection match {
+ case Some((projectList, hiddenList)) =>
+ val project = Project(projectList, resolvedJoin)
+ project.setTagValue(
+ Project.hiddenOutputTag,
+ hiddenList.map(_.markAsQualifiedAccessOnly()))
+ project
+ case None => resolvedJoin
+ }
+ }
+}
+
+private[analysis] object AsOfJoinValidation extends QueryErrorsBase {
+
+ def validateMatchConditionTableReferences(
+ join: AsOfJoin,
+ left: LogicalPlan,
+ right: LogicalPlan,
+ leftExpr: Expression,
+ rightExpr: Expression): Unit = {
+ val leftSet = left.outputSet
+ val rightSet = right.outputSet
+
+ def referencesBothJoinSides(refs: AttributeSet): Boolean = {
+ refs.nonEmpty &&
+ refs.intersect(leftSet).nonEmpty &&
+ refs.intersect(rightSet).nonEmpty
+ }
+
+ val leftRefs = leftExpr.references
+ val rightRefs = rightExpr.references
+ if (referencesBothJoinSides(leftRefs) ||
referencesBothJoinSides(rightRefs)) {
+ join.failAnalysis(
+ errorClass = "ASOF_JOIN_MATCH_CONDITION_TABLE_REFERENCE",
+ messageParameters = Map(
+ "refs1" -> toSQLExpr(leftExpr),
+ "refs2" -> toSQLExpr(rightExpr)))
+ }
+ }
+
+ def validateMatchConditionOperands(
+ join: AsOfJoin,
+ leftExpr: Expression,
+ rightExpr: Expression): Unit = {
+ Seq(leftExpr, rightExpr).foreach { expr =>
+ findInvalidMatchConditionExpression(expr).foreach { invalidExpr =>
+ join.failAnalysis(
+ errorClass = "ASOF_JOIN_MATCH_CONDITION_INVALID_EXPRESSION",
+ messageParameters = Map("expr" -> toSQLExpr(invalidExpr)))
+ }
+ }
+ if (!RowOrdering.isOrderable(leftExpr.dataType) ||
+ !RowOrdering.isOrderable(rightExpr.dataType) ||
+ !areMatchConditionTypesCompatible(leftExpr.dataType,
rightExpr.dataType)) {
+ join.failAnalysis(
+ errorClass = "ASOF_JOIN_MATCH_CONDITION_INVALID_TYPE",
+ messageParameters = Map(
+ "type1" -> toSQLType(leftExpr.dataType),
+ "type2" -> toSQLType(rightExpr.dataType)))
+ }
+ }
+
+ def validateMatchConditionPlannerSupport(
+ join: AsOfJoin,
+ leftOperand: Expression,
+ rightOperand: Expression): Unit = {
+ if (!areScalarSubtractBasedOperands(leftOperand, rightOperand)) {
+ join.failAnalysis(
+ errorClass = "AS_OF_JOIN.UNSUPPORTED_MATCH_CONDITION_OPERAND",
+ messageParameters = Map(
+ "type1" -> toSQLType(leftOperand.dataType),
+ "type2" -> toSQLType(rightOperand.dataType)))
+ }
+ }
+
+ /**
+ * Until multi-column sort-merge ASOF execution lands (SPARK-58124), the
planner can only
+ * consume MATCH_CONDITION plans whose `orderExpression` is a scalar
`Subtract`. STRING and
+ * composite operands use other distance expressions that `findFromOrder`
cannot parse.
+ */
+ private def areScalarSubtractBasedOperands(
+ leftExpr: Expression,
+ rightExpr: Expression): Boolean = {
+ supportsSubtractForPlanner(leftExpr.dataType) &&
supportsSubtractForPlanner(rightExpr.dataType)
+ }
+
+ private def supportsSubtractForPlanner(dataType: DataType): Boolean = {
Review Comment:
This is a verbatim copy of `AsOfJoin.supportsSubtract` (same type list). The
two are coupled by construction — the planner-support gate must accept exactly
the types `buildLeafOrderExpression` routes down the `Subtract` path — so
keeping two copies invites silent drift if one side later gains a type. Reuse
the existing predicate rather than duplicating it (e.g. expose
`AsOfJoin.supportsSubtract` and call it here).
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