io.prestosql.util

Class SpatialJoinUtils

java.lang.Object

io.prestosql.util.SpatialJoinUtils

public class SpatialJoinUtils
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static String	ST_CONTAINS
static String	ST_DISTANCE
static String	ST_INTERSECTS
static String	ST_WITHIN

Method Summary

Modifier and Type	Method and Description
static List<ComparisonExpression>	extractSupportedSpatialComparisons(Expression filterExpression) Returns a subset of conjuncts matching one the following shapes: - ST_Distance(...) <= ...
static List<FunctionCall>	extractSupportedSpatialFunctions(Expression filterExpression) Returns a subset of conjuncts matching one of the following shapes: - ST_Contains(...) - ST_Within(...) - ST_Intersects(...)
static boolean	isSpatialJoinFilter(PlanNode left, PlanNode right, Expression filterExpression)

Methods inherited from class java.lang.Object

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

Field Detail

ST_CONTAINS

public static final String ST_CONTAINS

See Also:

Constant Field Values

ST_WITHIN

public static final String ST_WITHIN

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Constant Field Values

ST_INTERSECTS

public static final String ST_INTERSECTS

See Also:

Constant Field Values

ST_DISTANCE

public static final String ST_DISTANCE

See Also:

Constant Field Values

Method Detail

extractSupportedSpatialFunctions

public static List<FunctionCall> extractSupportedSpatialFunctions(Expression filterExpression)

Returns a subset of conjuncts matching one of the following shapes: - ST_Contains(...) - ST_Within(...) - ST_Intersects(...)

Doesn't check or guarantee anything about function arguments.

extractSupportedSpatialComparisons

public static List<ComparisonExpression> extractSupportedSpatialComparisons(Expression filterExpression)

Returns a subset of conjuncts matching one the following shapes: - ST_Distance(...) <= ... - ST_Distance(...) < ... - ... >= ST_Distance(...) - ... > ST_Distance(...)

Doesn't check or guarantee anything about ST_Distance functions arguments or the other side of the comparison.

isSpatialJoinFilter

public static boolean isSpatialJoinFilter(PlanNode left,
                                          PlanNode right,
                                          Expression filterExpression)