com.facebook.presto.common.predicate

Class TupleDomainFilter.AbstractTupleDomainFilter

java.lang.Object

com.facebook.presto.common.predicate.TupleDomainFilter.AbstractTupleDomainFilter

All Implemented Interfaces:

TupleDomainFilter

Direct Known Subclasses:

TupleDomainFilter.AbstractRange, TupleDomainFilter.AlwaysFalse, TupleDomainFilter.BigintMultiRange, TupleDomainFilter.BigintRange, TupleDomainFilter.BigintValuesUsingBitmask, TupleDomainFilter.BigintValuesUsingHashTable, TupleDomainFilter.BooleanValue, TupleDomainFilter.BytesRange, TupleDomainFilter.BytesValues, TupleDomainFilter.BytesValuesExclusive, TupleDomainFilter.IsNotNull, TupleDomainFilter.IsNull, TupleDomainFilter.MultiRange

Enclosing interface:

TupleDomainFilter

public abstract static class TupleDomainFilter.AbstractTupleDomainFilter
extends Object
implements TupleDomainFilter

Nested Class Summary

Nested classes/interfaces inherited from interface com.facebook.presto.common.predicate.TupleDomainFilter

TupleDomainFilter.AbstractRange, TupleDomainFilter.AbstractTupleDomainFilter, TupleDomainFilter.AlwaysFalse, TupleDomainFilter.BasePositionalFilter, TupleDomainFilter.BigintMultiRange, TupleDomainFilter.BigintRange, TupleDomainFilter.BigintValuesUsingBitmask, TupleDomainFilter.BigintValuesUsingHashTable, TupleDomainFilter.BooleanValue, TupleDomainFilter.BytesRange, TupleDomainFilter.BytesValues, TupleDomainFilter.BytesValuesExclusive, TupleDomainFilter.DoubleRange, TupleDomainFilter.FloatRange, TupleDomainFilter.IsNotNull, TupleDomainFilter.IsNull, TupleDomainFilter.LongDecimalRange, TupleDomainFilter.MultiRange, TupleDomainFilter.NullsFilter, TupleDomainFilter.PositionalFilter

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	nullAllowed

Fields inherited from interface com.facebook.presto.common.predicate.TupleDomainFilter

ALWAYS_FALSE, IS_NOT_NULL, IS_NULL

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractTupleDomainFilter(boolean deterministic, boolean nullAllowed)

Method Summary

Modifier and Type	Method and Description
int	getPrecedingPositionsToFail() When a filter applied to a nested column fails, the whole top-level position should fail.
int	getSucceedingPositionsToFail()
boolean	isDeterministic() A filter becomes non-deterministic when applies to nested column, e.g.
boolean	isPositionalFilter()
boolean	testBoolean(boolean value)
boolean	testBytes(byte[] buffer, int offset, int length)
boolean	testDecimal(long low, long high)
boolean	testDouble(double value)
boolean	testFloat(float value)
boolean	testLength(int length) Filters like string equality and IN, as well as conditions on cardinality of lists and maps can be at least partly decided by looking at lengths alone.
boolean	testLong(long value)
boolean	testNonNull() Used to apply is [not] null filters to complex types, e.g.
boolean	testNull()

Methods inherited from class java.lang.Object

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

Field Detail

nullAllowed

protected final boolean nullAllowed

Constructor Detail

AbstractTupleDomainFilter

protected AbstractTupleDomainFilter(boolean deterministic,
                                    boolean nullAllowed)

Method Detail

isDeterministic

public boolean isDeterministic()

Description copied from interface: TupleDomainFilter

A filter becomes non-deterministic when applies to nested column, e.g. a[1] > 10 is non-deterministic because > 10 filter applies only to some positions, e.g. first entry in a set of entries that correspond to a single top-level position.

Specified by:

isDeterministic in interface TupleDomainFilter

testNull

public boolean testNull()

Specified by:

testNull in interface TupleDomainFilter

testNonNull

public boolean testNonNull()

Description copied from interface: TupleDomainFilter

Used to apply is [not] null filters to complex types, e.g. a[1] is null AND a[3] is not null, where a is an array(array(T)).

In these case, the exact values are not known, but it is known whether they are null or not. Furthermore, for some positions only nulls are allowed (a[1] is null), for others only non-nulls (a[3] is not null), and for the rest both are allowed (a[2] and a[N], where N > 3).

Specified by:

testNonNull in interface TupleDomainFilter

testLong

public boolean testLong(long value)

Specified by:

testLong in interface TupleDomainFilter

testDouble

public boolean testDouble(double value)

Specified by:

testDouble in interface TupleDomainFilter

testFloat

public boolean testFloat(float value)

Specified by:

testFloat in interface TupleDomainFilter

testDecimal

public boolean testDecimal(long low,
                           long high)

Specified by:

testDecimal in interface TupleDomainFilter

testBoolean

public boolean testBoolean(boolean value)

Specified by:

testBoolean in interface TupleDomainFilter

testBytes

public boolean testBytes(byte[] buffer,
                         int offset,
                         int length)

Specified by:

testBytes in interface TupleDomainFilter

testLength

public boolean testLength(int length)

Description copied from interface: TupleDomainFilter

Filters like string equality and IN, as well as conditions on cardinality of lists and maps can be at least partly decided by looking at lengths alone. If this is false, then no further checks are needed. If true, eventual filters on the data itself need to be evaluated.

Specified by:

testLength in interface TupleDomainFilter

getPrecedingPositionsToFail

public int getPrecedingPositionsToFail()

Description copied from interface: TupleDomainFilter

When a filter applied to a nested column fails, the whole top-level position should fail. To enable this functionality, the filter keeps track of the boundaries of top-level positions and allows the caller to find out where the current top-level position started and how far it continues.

Specified by:

getPrecedingPositionsToFail in interface TupleDomainFilter

Returns:

number of positions from the start of the current top-level position up to the current position (excluding current position)

getSucceedingPositionsToFail

public int getSucceedingPositionsToFail()

Specified by:

getSucceedingPositionsToFail in interface TupleDomainFilter

Returns:

number of positions remaining until the end of the current top-level position

isPositionalFilter

public boolean isPositionalFilter()

Specified by:

isPositionalFilter in interface TupleDomainFilter

Returns:

true if getPrecedingPositionsToFail or getSucceedingPositionsToFail may return non-zero values