org.apache.drill.exec.physical.impl.scan

Class TestColumnsArrayParser

java.lang.Object

DrillTest

org.apache.drill.test.SubOperatorTest

org.apache.drill.exec.physical.impl.scan.TestColumnsArrayParser

public class TestColumnsArrayParser
extends SubOperatorTest

Field Summary

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

dirTestWatcher, fixture

Constructor Summary

Constructors

Constructor and Description
TestColumnsArrayParser()

Method Summary

Modifier and Type	Method and Description
void	testColumnsArray() Test the special "columns" column that asks to return all columns as an array.
void	testColumnsArrayCaseInsensitive()
void	testColumnsAsMap()
void	testColumnsElements()
void	testColumnsIndexTooLarge()
void	testErrorColumnAndColumnsArray() Exclude a column and `columns` (reversed order of previous test).
void	testErrorColumnsArrayAndColumn() The `columns` column is special; can't include both `columns` and a named column in the same project.
void	testErrorRequiredAndExtra()
void	testMetadataColumnsWithColumnsArray() The `columns` column is special: can't be used with other column names.
void	testRequiredColumnsArray()
void	testRequiredWildcard()
void	testTwoColumnsArray() Requesting `columns` twice: second is ignored.
void	testWildcardAndColumns() If a query is of the form:

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

classSetup, classTeardown

Methods inherited from class java.lang.Object

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

Constructor Detail

TestColumnsArrayParser

public TestColumnsArrayParser()

Method Detail

testColumnsArray

public void testColumnsArray()

Test the special "columns" column that asks to return all columns as an array. No need for early schema. This case is special: it actually creates the one and only table column to match the desired output column.

testRequiredColumnsArray

public void testRequiredColumnsArray()

testRequiredWildcard

public void testRequiredWildcard()

testColumnsArrayCaseInsensitive

public void testColumnsArrayCaseInsensitive()

testColumnsElements

public void testColumnsElements()

testErrorColumnsArrayAndColumn

public void testErrorColumnsArrayAndColumn()

The `columns` column is special; can't include both `columns` and a named column in the same project.

TODO: This should only be true for text readers, make this an option.

testErrorColumnAndColumnsArray

public void testErrorColumnAndColumnsArray()

Exclude a column and `columns` (reversed order of previous test).

testTwoColumnsArray

public void testTwoColumnsArray()

Requesting `columns` twice: second is ignored.

testErrorRequiredAndExtra

public void testErrorRequiredAndExtra()

testColumnsIndexTooLarge

public void testColumnsIndexTooLarge()

testMetadataColumnsWithColumnsArray

public void testMetadataColumnsWithColumnsArray()

The `columns` column is special: can't be used with other column names. Make sure that the rule does not apply to implicit columns.

testWildcardAndColumns

public void testWildcardAndColumns()

If a query is of the form:

 select * from dfs.`multilevel/csv` where columns[1] < 1000
 
 Then the projection list passed to the scan operator
 includes both the wildcard and the `columns` array.
 We can ignore one of them.

testColumnsAsMap

public void testColumnsAsMap()