org.tikv.common.predicates

Class PredicateUtils

java.lang.Object

org.tikv.common.predicates.PredicateUtils

public class PredicateUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
PredicateUtils()

Method Summary

Modifier and Type	Method and Description
static List<IndexRange>	expressionToIndexRanges(List<Expression> pointPredicates, Optional<Expression> rangePredicate, TiTableInfo table, TiIndexInfo index) Build index ranges from access points and access conditions
static Set<ColumnRef>	extractColumnRefFromExpression(Expression expr)
static Expression	mergeCNFExpressions(List<Expression> exprs)

Methods inherited from class java.lang.Object

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

Constructor Detail

PredicateUtils

public PredicateUtils()

Method Detail

mergeCNFExpressions

public static Expression mergeCNFExpressions(List<Expression> exprs)

extractColumnRefFromExpression

public static Set<ColumnRef> extractColumnRefFromExpression(Expression expr)

expressionToIndexRanges

public static List<IndexRange> expressionToIndexRanges(List<Expression> pointPredicates,
                                                       Optional<Expression> rangePredicate,
                                                       TiTableInfo table,
                                                       TiIndexInfo index)

Build index ranges from access points and access conditions

Parameters:

pointPredicates - conditions converting to a single point access

rangePredicate - conditions converting to a range

Returns:

Index Range for scan