snuyanzin commented on code in PR #29481:
URL: https://github.com/apache/flink/pull/29481#discussion_r4280150179
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flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/planner/codegen/calls/ScalarOperatorGens.scala:
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@@ -1948,60 +1948,98 @@ object ScalarOperatorGens {
val rightTerm = args(1)
val resultTerm = newName(ctx, "compareResult")
+ val sizeTerm = newName(ctx, "size")
val mapCls = className[java.util.Map[_, _]]
- val keyCls = boxedTypeTermForType(keyType)
- val valueCls = boxedTypeTermForType(valueType)
+ val hashMapCls = className[java.util.HashMap[_, _]]
+ val valueCls = primitiveTypeTermForType(valueType)
+ val valueDefault = primitiveDefaultValue(valueType)
- val leftMapTerm = newName(ctx, "leftMap")
- val leftKeyTerm = newName(ctx, "leftKey")
+ val keyGetterCls = classOf[ArrayData.ElementGetter].getCanonicalName
+ val keyGetterTerm =
+ ctx.addReusableObject(ArrayData.createElementGetter(keyType),
"keyGetter", keyGetterCls)
+
+ val leftKeysTerm = newName(ctx, "leftKeys")
+ val leftValuesTerm = newName(ctx, "leftValues")
+ val rightKeysTerm = newName(ctx, "rightKeys")
+ val rightValuesTerm = newName(ctx, "rightValues")
+ val leftKeyIndexTerm = newName(ctx, "leftKeyIndex")
+ val rightKeyIndexTerm = newName(ctx, "rightKeyIndex")
+
+ val indexTerm = newName(ctx, "index")
+ val entryTerm = newName(ctx, "entry")
+ val entryCls = classOf[java.util.Map.Entry[AnyRef,
AnyRef]].getCanonicalName
+ val leftIndexTerm = newName(ctx, "leftIndex")
+ val rightIndexTerm = newName(ctx, "rightIndex")
+ val rightBoxedIndexTerm = newName(ctx, "rightBoxedIndex")
+
+ // The values are read in place from the value arrays. Reading them
from a java.util.Map
+ // would box them, and generateEquals compares boxes by reference.
val leftValueTerm = newName(ctx, "leftValue")
val leftValueNullTerm = newName(ctx, "leftValueIsNull")
- val leftValueExpr =
- GeneratedExpression(leftValueTerm, leftValueNullTerm, "", valueType)
+ val leftValueExpr = GeneratedExpression(leftValueTerm,
leftValueNullTerm, "", valueType)
- val rightMapTerm = newName(ctx, "rightMap")
val rightValueTerm = newName(ctx, "rightValue")
val rightValueNullTerm = newName(ctx, "rightValueIsNull")
- val rightValueExpr =
- GeneratedExpression(rightValueTerm, rightValueNullTerm, "",
valueType)
+ val rightValueExpr = GeneratedExpression(rightValueTerm,
rightValueNullTerm, "", valueType)
- val entryTerm = newName(ctx, "entry")
- val entryCls = classOf[java.util.Map.Entry[AnyRef,
AnyRef]].getCanonicalName
val valueEqualsExpr =
generateEquals(ctx, leftValueExpr, rightValueExpr, new
BooleanType(valueType.isNullable))
- val internalTypeCls = classOf[LogicalType].getCanonicalName
- val keyTypeTerm = ctx.addReusableObject(keyType, "keyType",
internalTypeCls)
- val valueTypeTerm = ctx.addReusableObject(valueType, "valueType",
internalTypeCls)
- val mapDataUtil = className[MapDataUtil]
-
+ // A map can hold a key more than once, and then its last entry
counts. Each key index keeps
+ // the last position of every key, so equal maps have key indexes of
the same size whose
+ // values match at those positions.
val stmt =
s"""
|boolean $resultTerm;
- |if ($leftTerm.size() == $rightTerm.size()) {
+ |int $sizeTerm = $leftTerm.size();
+ |if ($sizeTerm == $rightTerm.size()) {
Review Comment:
can we have fast return and less indentation if sizes do not match?
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