com.bigdata.rdf.sparql.ast.eval

Class ASTSearchInSearchOptimizer

java.lang.Object

com.bigdata.rdf.sparql.ast.optimizers.AbstractJoinGroupOptimizer

com.bigdata.rdf.sparql.ast.eval.ASTSearchInSearchOptimizer

All Implemented Interfaces:

IASTOptimizer

public class ASTSearchInSearchOptimizer
extends AbstractJoinGroupOptimizer

Converts a BDS.SEARCH_IN_SEARCH function call (inside a filter) into an IN filter using the full text index to determine the IN set. Convert:

 filter((?o,"foo")) .
 

To:

 filter(?o IN ("foo", "foo bar", "hello foo", ...)) .
 

This is a way of using the full text index to filter instead of using regex.

Constructor Summary

Constructors

Constructor and Description
ASTSearchInSearchOptimizer()

Method Summary

Methods

Modifier and Type	Method and Description
protected FunctionNode	convert(AST2BOpContext ctx, FunctionNode searchInSearch) Perform the conversion from one function (BDS.SEARCH_IN_SEARCH) to another (IN).
protected IV[]	getHits(AST2BOpContext ctx, org.openrdf.model.Literal search, String match, String regex) Collect the hits for the IN filter.
protected void	optimize(AST2BOpContext ctx, StaticAnalysis sa, JoinGroupNode group, FilterNode filterNode) Optimize a single FilterNode.
protected void	optimizeJoinGroup(AST2BOpContext ctx, StaticAnalysis sa, IBindingSet[] bSets, JoinGroupNode group) Optimize the join group.

Methods inherited from class com.bigdata.rdf.sparql.ast.optimizers.AbstractJoinGroupOptimizer

optimize

Methods inherited from class java.lang.Object

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

Constructor Detail

ASTSearchInSearchOptimizer

public ASTSearchInSearchOptimizer()

Method Detail

optimizeJoinGroup

protected void optimizeJoinGroup(AST2BOpContext ctx,
                     StaticAnalysis sa,
                     IBindingSet[] bSets,
                     JoinGroupNode group)

Optimize the join group.

Specified by:

optimizeJoinGroup in class AbstractJoinGroupOptimizer

optimize

protected void optimize(AST2BOpContext ctx,
            StaticAnalysis sa,
            JoinGroupNode group,
            FilterNode filterNode)

Optimize a single FilterNode. We want to replace a search in search function node with an In function node.

convert

protected FunctionNode convert(AST2BOpContext ctx,
                   FunctionNode searchInSearch)

Perform the conversion from one function (BDS.SEARCH_IN_SEARCH) to another (IN).

getHits

protected IV[] getHits(AST2BOpContext ctx,
           org.openrdf.model.Literal search,
           String match,
           String regex)

Collect the hits for the IN filter.