org.apache.drill.exec.physical.rowSet

Class TestVariableWidthWriter

java.lang.Object

org.apache.drill.test.BaseTest

org.apache.drill.test.DrillTest

org.apache.drill.test.SubOperatorTest

org.apache.drill.exec.physical.rowSet.TestVariableWidthWriter

public class TestVariableWidthWriter
extends SubOperatorTest

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.drill.test.DrillTest

DrillTest.MemWatcher

Field Summary

Fields inherited from class org.apache.drill.test.SubOperatorTest

dirTestWatcher, fixture

Fields inherited from class org.apache.drill.test.DrillTest

logOutcome, objectMapper, REPEAT_RULE, thrownException, TIMEOUT

Constructor Summary

Constructors

Constructor and Description
TestVariableWidthWriter()

Method Summary

Modifier and Type	Method and Description
void	testFillEmpties() Filling empties in a variable-width row means carrying forward offsets (as tested elsewhere), leaving zero-length values.
void	testRestartRow()
void	testRollover() The rollover method is used during vector overflow.
void	testRolloverWithEmpties() Simulate the case in which the tail end of an overflow batch has empties.
void	testSizeLimit() Test resize monitoring.
void	testSkipNulls() Test the case in which a scalar vector is used in conjunction with a nullable bits vector.
void	testWrite() Basic test to write a contiguous set of values, enough to cause the vector to double in size twice, then read back the values.

Methods inherited from class org.apache.drill.test.SubOperatorTest

classSetup, classTeardown

Methods inherited from class org.apache.drill.test.DrillTest

escapeJsonString, finishDrillTest, initDrillTest

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TestVariableWidthWriter

public TestVariableWidthWriter()

Method Detail

testWrite

public void testWrite()

Basic test to write a contiguous set of values, enough to cause the vector to double in size twice, then read back the values.

testRestartRow

public void testRestartRow()

testFillEmpties

public void testFillEmpties()

Filling empties in a variable-width row means carrying forward offsets (as tested elsewhere), leaving zero-length values.

testRollover

public void testRollover()

The rollover method is used during vector overflow.

testRolloverWithEmpties

public void testRolloverWithEmpties()

Simulate the case in which the tail end of an overflow batch has empties. preRollover() should back-fill them with the next offset prior to rollover.

testSkipNulls

public void testSkipNulls()

Test the case in which a scalar vector is used in conjunction with a nullable bits vector. The nullable vector will call the skipNulls() method to avoid writing values for null entries. For variable-width, there is no difference between filling empties and skipping nulls: both result in zero-sized entries.

testSizeLimit

public void testSizeLimit()

Test resize monitoring. Add a listener to an Varchar writer, capture each resize, and refuse a resize when the s of the vector exceeds 1 MB. This will trigger an overflow, which will throw an exception which we then check for.