use of org.apache.drill.exec.physical.impl.scan.v3.ManagedReader in project drill by apache.
the class TestScanLifecycleTwoReaders method testColumnReorderingAB.
/**
* {@code SELECT * FROM} (a, b) then (b,a). The order of the first
* table drives the order of the results.
*/
@Test
public void testColumnReorderingAB() {
ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
builder.readerFactory(new TwoReaderFactory() {
@Override
public ManagedReader firstReader(SchemaNegotiator negotiator) {
return new MockLateSchemaReader(negotiator, 1);
}
@Override
public ManagedReader secondReader(SchemaNegotiator negotiator) {
return new MockReorderedReader(negotiator);
}
});
ScanLifecycle scan = buildScan(builder);
verifyStandardReader(scan, 0);
RowBatchReader reader = scan.nextReader();
reader = scan.nextReader();
assertTrue(reader.open());
assertTrue(reader.next());
RowSet expected = fixture.rowSetBuilder(SCHEMA).addRow(30, "barney").addRow(40, "betty").build();
RowSetUtilities.verify(expected, fixture.wrap(reader.output()));
assertFalse(reader.next());
reader.close();
scan.close();
}
use of org.apache.drill.exec.physical.impl.scan.v3.ManagedReader in project drill by apache.
the class TestReaderErrors method testCloseError.
@Test
public void testCloseError() {
ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
builder.errorContext(b -> b.addContext("Scan context"));
builder.readerFactory(new SingleReaderFactory() {
@Override
public ManagedReader next(SchemaNegotiator negotiator) {
return new FailingReader(negotiator, "close");
}
});
ScanLifecycle scan = buildScan(builder);
RowBatchReader reader = scan.nextReader();
assertTrue(reader.open());
assertFalse(reader.next());
try {
reader.close();
fail();
} catch (UserException e) {
// Expected
}
scan.close();
}
use of org.apache.drill.exec.physical.impl.scan.v3.ManagedReader in project drill by apache.
the class TestScanLifecycleLimit method setupScan.
private Pair<TwoReaderFactory, ScanLifecycle> setupScan(long limit) {
ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
builder.projection(RowSetTestUtils.projectList("a"));
TwoReaderFactory factory = new TwoReaderFactory() {
@Override
public ManagedReader firstReader(SchemaNegotiator negotiator) {
return new Mock50RowReader(negotiator);
}
@Override
public ManagedReader secondReader(SchemaNegotiator negotiator) {
return new Mock50RowReader(negotiator);
}
};
builder.readerFactory(factory);
builder.limit(limit);
return Pair.of(factory, buildScan(builder));
}
use of org.apache.drill.exec.physical.impl.scan.v3.ManagedReader in project drill by apache.
the class TestScanLifecycleTwoReaders method testTwoValidReaders.
@Test
public void testTwoValidReaders() {
ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
builder.readerFactory(new TwoReaderFactory() {
@Override
public ManagedReader firstReader(SchemaNegotiator negotiator) {
return new MockLateSchemaReader(negotiator, 1);
}
@Override
public ManagedReader secondReader(SchemaNegotiator negotiator) {
return new MockLateSchemaReader(negotiator, 1);
}
});
ScanLifecycle scan = buildScan(builder);
verifyStandardReader(scan, 0);
verifyStandardReader(scan, 0);
scan.close();
}
use of org.apache.drill.exec.physical.impl.scan.v3.ManagedReader in project drill by apache.
the class TestScanLifecycleTwoReaders method testShrinkingSchemaWithConflict.
/**
* Shrinking schema, as above. Explicit projection:<pre><code>
* SELECT a, b FROM (a) then (a,b)
* </code></pre><p>
* But choose a missing column type (the default
* Nullable INT) in the first reader that will conflict with the actual column type
* (VARCHAR) in the second.
*/
@Test
public void testShrinkingSchemaWithConflict() {
ScanLifecycleBuilder builder = new ScanLifecycleBuilder();
builder.projection(RowSetTestUtils.projectList("a", "b"));
builder.readerFactory(new TwoReaderFactory() {
@Override
public ManagedReader firstReader(SchemaNegotiator negotiator) {
return new MockSingleColReader(negotiator);
}
@Override
public ManagedReader secondReader(SchemaNegotiator negotiator) {
return new MockEarlySchemaReader(negotiator, 1);
}
});
ScanLifecycle scan = buildScan(builder);
RowBatchReader reader = scan.nextReader();
assertTrue(reader.open());
assertTrue(reader.next());
reader.output().clear();
assertFalse(reader.next());
reader.close();
reader = scan.nextReader();
try {
reader.open();
fail();
} catch (UserException e) {
assertTrue(e.getMessage().contains("conflict"));
}
reader.close();
scan.close();
}
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