/*
* Licensed 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 com.facebook.presto.sql.analyzer;
import com.facebook.presto.sql.tree.DereferenceExpression;
import com.facebook.presto.sql.tree.Expression;
import com.facebook.presto.sql.tree.QualifiedName;
import org.testng.annotations.Test;
import java.util.Optional;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertTrue;
public class TestScope
{
@Test
public void test()
{
Scope root = Scope.create();
Field outerColumn1 = Field.newQualified(QualifiedName.of("outer", "column1"), Optional.of("c1"), BIGINT, false, Optional.empty(), false);
Field outerColumn2 = Field.newQualified(QualifiedName.of("outer", "column2"), Optional.of("c2"), BIGINT, false, Optional.empty(), false);
Scope outer = Scope.builder().withParent(root).withRelationType(RelationId.anonymous(), new RelationType(outerColumn1, outerColumn2)).build();
Field innerColumn2 = Field.newQualified(QualifiedName.of("inner", "column2"), Optional.of("c2"), BIGINT, false, Optional.empty(), false);
Field innerColumn3 = Field.newQualified(QualifiedName.of("inner", "column3"), Optional.of("c3"), BIGINT, false, Optional.empty(), false);
Scope inner = Scope.builder().withOuterQueryParent(outer).withRelationType(RelationId.anonymous(), new RelationType(innerColumn2, innerColumn3)).build();
Expression c1 = name("c1");
Expression c2 = name("c2");
Expression c3 = name("c3");
Expression c4 = name("c4");
assertFalse(root.tryResolveField(c1).isPresent());
assertTrue(outer.tryResolveField(c1).isPresent());
assertEquals(outer.tryResolveField(c1).get().getField(), outerColumn1);
assertEquals(outer.tryResolveField(c1).get().isLocal(), true);
assertEquals(outer.tryResolveField(c1).get().getHierarchyFieldIndex(), 0);
assertTrue(outer.tryResolveField(c2).isPresent());
assertEquals(outer.tryResolveField(c2).get().getField(), outerColumn2);
assertEquals(outer.tryResolveField(c2).get().isLocal(), true);
assertEquals(outer.tryResolveField(c2).get().getHierarchyFieldIndex(), 1);
assertFalse(outer.tryResolveField(c3).isPresent());
assertFalse(outer.tryResolveField(c4).isPresent());
assertTrue(inner.tryResolveField(c1).isPresent());
assertEquals(inner.tryResolveField(c1).get().getField(), outerColumn1);
assertEquals(inner.tryResolveField(c1).get().isLocal(), false);
assertEquals(inner.tryResolveField(c1).get().getHierarchyFieldIndex(), 2);
assertEquals(inner.tryResolveField(c1).get().getRelationFieldIndex(), 0);
assertTrue(inner.tryResolveField(c2).isPresent());
assertEquals(inner.tryResolveField(c2).get().getField(), innerColumn2);
assertEquals(inner.tryResolveField(c2).get().isLocal(), true);
assertEquals(inner.tryResolveField(c2).get().getHierarchyFieldIndex(), 0);
assertTrue(inner.tryResolveField(c2).isPresent());
assertEquals(inner.tryResolveField(c3).get().getField(), innerColumn3);
assertEquals(inner.tryResolveField(c3).get().isLocal(), true);
assertEquals(inner.tryResolveField(c3).get().getHierarchyFieldIndex(), 1);
assertFalse(inner.tryResolveField(c4).isPresent());
assertEquals(inner.getOuterQueryParent(), Optional.of(outer));
}
private static Expression name(String first, String... parts)
{
return DereferenceExpression.from(QualifiedName.of(first, parts));
}
}