org.apache.drill.exec.physical.rowSet

Class TestFixedWidthWriter

java.lang.Object

org.apache.drill.test.BaseTest

org.apache.drill.test.DrillTest

org.apache.drill.test.SubOperatorTest

org.apache.drill.exec.physical.rowSet.TestFixedWidthWriter

public class TestFixedWidthWriter
extends SubOperatorTest

Test the int writer as a typical example of a fixed-width writer. Exercises normal writing, writing after a (simulated) overflow, and filling in empty values.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TestFixedWidthWriter.TestIndex

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
TestFixedWidthWriter()

Method Summary

Modifier and Type	Method and Description
void	testFillEmpties() Required, fixed-width vectors are back-filling with 0 to fill in missing 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

TestFixedWidthWriter

public TestFixedWidthWriter()

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()

Required, fixed-width vectors are back-filling with 0 to fill in missing values. While using zero is not strictly SQL compliant, it is better than failing. (The SQL solution would be to fill with nulls, but a required vector does not support nulls...)

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. (Without the call, the scalar writer will fill the empty values with zeros.)

testSizeLimit

public void testSizeLimit()

Test resize monitoring. Add a listener to an int writer, capture each resize, and refuse a resize when the number of ints exceeds 8K values. This will trigger an overflow, which will throw an exception which we then check for.