xiong duan created CALCITE-7336:
-----------------------------------
Summary: RelFieldTrimmer generates an incorrect plan when handling
correlated subqueries within a Filter
Key: CALCITE-7336
URL: https://issues.apache.org/jira/browse/CALCITE-7336
Project: Calcite
Issue Type: Bug
Reporter: xiong duan
The UT in RelFieldTrimmerTest:
{code:java}
@Test void testTrimCorrelatedSubqueryFilter() {
final RelBuilder builder = RelBuilder.create(config().build());
final Holder<@Nullable RexCorrelVariable> v = Holder.empty();
RelNode root = builder.scan("EMP")
.variable(v::set)
.filter(
builder.call(SqlStdOperatorTable.GREATER_THAN, builder.field(5),
builder.scalarQuery(
b2 -> builder.scan("EMP").filter(
builder.call(SqlStdOperatorTable.LESS_THAN,
builder.field(3), builder.field(v.get(), "MGR")))
.project(builder.field(0))
.aggregate(builder.groupKey(), builder.countStar("c"))
.build())))
.project(builder.field(0))
.build();
final RelFieldTrimmer fieldTrimmer = new RelFieldTrimmer(null, builder);
final RelNode trimmed = fieldTrimmer.trim(root);
final String expected = "LogicalProject(EMPNO=[$0])\n" +
" LogicalFilter(condition=[>($1, $SCALAR_QUERY({\n" +
"LogicalAggregate(group=[{}], c=[COUNT()])\n" +
" LogicalFilter(condition=[<($3, $cor0.MGR)])\n" +
" LogicalTableScan(table=[[scott, EMP]])\n" +
"}))])\n" +
" LogicalProject(EMPNO=[$0], SAL=[$5])\n" +
" LogicalTableScan(table=[[scott, EMP]])\n";
assertThat(trimmed, hasTree(expected));
} {code}
The paln:
{code:java}
LogicalProject(EMPNO=[$0], SAL=[$5]) {code}
should be:
{code:java}
LogicalProject(EMPNO=[$0], MGR=[$3], SAL=[$5]){code}
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