[
https://issues.apache.org/jira/browse/CALCITE-5394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Leonid Chistov updated CALCITE-5394:
------------------------------------
Description:
The following test case would fail if added to RelToSqlConverterTest.java:
{code:java}
@Test void testSemiJoinUnderJoin() {
final RelBuilder builder = relBuilder();
final RelNode base = builder
.scan("EMP")
.scan("EMP")
.join(
JoinRelType.SEMI, builder.equals(
builder.field(2, 0, "EMPNO"),
builder.field(2, 1, "EMPNO")))
.build();
final RelNode root = builder
.scan("DEPT")
.push(base)
.join(
JoinRelType.INNER, builder.equals(
builder.field(2, 1, "DEPTNO"),
builder.field(2, 0, "DEPTNO")))
.project(builder.field("DEPTNO"))
.build();
toSql(root);
} {code}
The exception is:
{code:java}
alias
java.lang.NullPointerException: alias
at java.base/java.util.Objects.requireNonNull(Objects.java:233)
at
org.apache.calcite.rel.rel2sql.SqlImplementor.collectAliases(SqlImplementor.java:493)
at
org.apache.calcite.rel.rel2sql.SqlImplementor.collectAliases(SqlImplementor.java:491)
at
org.apache.calcite.rel.rel2sql.SqlImplementor.result(SqlImplementor.java:476)
at
org.apache.calcite.rel.rel2sql.RelToSqlConverter.visit(RelToSqlConverter.java:246)
{code}
Cause of failure seems to be that `RelToSqlConverter::visitAntiOrSemiJoin`
rewrites semi-join as select with no associated alias.
was:
The following test case would fail if added to RelToSqlConverterTest.java:
{code:java}
@Test void testSemiJoinUnderJoin() {
final RelBuilder builder = relBuilder();
final RelNode base = builder
.scan("EMP")
.scan("EMP")
.join(
JoinRelType.SEMI, builder.equals(
builder.field(2, 0, "EMPNO"),
builder.field(2, 1, "EMPNO")))
.build();
final RelNode root = builder
.scan("DEPT")
.push(base)
.join(
JoinRelType.INNER, builder.equals(
builder.field(2, 1, "DEPTNO"),
builder.field(2, 0, "DEPTNO")))
.project(builder.field("DEPTNO"))
.build();
toSql(root);
} {code}
The exception is:
{code:java}
alias
java.lang.NullPointerException: alias
at java.base/java.util.Objects.requireNonNull(Objects.java:233)
at
org.apache.calcite.rel.rel2sql.SqlImplementor.collectAliases(SqlImplementor.java:493)
at
org.apache.calcite.rel.rel2sql.SqlImplementor.collectAliases(SqlImplementor.java:491)
at
org.apache.calcite.rel.rel2sql.SqlImplementor.result(SqlImplementor.java:476)
at
org.apache.calcite.rel.rel2sql.RelToSqlConverter.visit(RelToSqlConverter.java:246)
{code}
Cause of failure seems to be that `RelToSqlConverter::visitAntiOrSemiJoin`
rewrites semi-join as select with no associated alias.
> RelToSql converter fails when semi-join is under a join node
> ------------------------------------------------------------
>
> Key: CALCITE-5394
> URL: https://issues.apache.org/jira/browse/CALCITE-5394
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.32.0
> Reporter: Leonid Chistov
> Priority: Minor
>
> The following test case would fail if added to RelToSqlConverterTest.java:
> {code:java}
> @Test void testSemiJoinUnderJoin() {
> final RelBuilder builder = relBuilder();
> final RelNode base = builder
> .scan("EMP")
> .scan("EMP")
> .join(
> JoinRelType.SEMI, builder.equals(
> builder.field(2, 0, "EMPNO"),
> builder.field(2, 1, "EMPNO")))
> .build();
> final RelNode root = builder
> .scan("DEPT")
> .push(base)
> .join(
> JoinRelType.INNER, builder.equals(
> builder.field(2, 1, "DEPTNO"),
> builder.field(2, 0, "DEPTNO")))
> .project(builder.field("DEPTNO"))
> .build();
> toSql(root);
> } {code}
> The exception is:
> {code:java}
> alias
> java.lang.NullPointerException: alias
> at java.base/java.util.Objects.requireNonNull(Objects.java:233)
> at
> org.apache.calcite.rel.rel2sql.SqlImplementor.collectAliases(SqlImplementor.java:493)
> at
> org.apache.calcite.rel.rel2sql.SqlImplementor.collectAliases(SqlImplementor.java:491)
> at
> org.apache.calcite.rel.rel2sql.SqlImplementor.result(SqlImplementor.java:476)
> at
> org.apache.calcite.rel.rel2sql.RelToSqlConverter.visit(RelToSqlConverter.java:246)
> {code}
> Cause of failure seems to be that `RelToSqlConverter::visitAntiOrSemiJoin`
> rewrites semi-join as select with no associated alias.
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