io.crate.operation.predicate

Class MatchPredicate

java.lang.Object

io.crate.operation.predicate.MatchPredicate

All Implemented Interfaces:

FunctionImplementation<Function>

public class MatchPredicate
extends java.lang.Object
implements FunctionImplementation<Function>

The match predicate is only used to generate lucene queries from.

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.lucene.util.BytesRef	DEFAULT_MATCH_TYPE
static FunctionIdent	IDENT
static FunctionInfo	INFO
static java.lang.String	NAME
static java.util.Set<DataType>	SUPPORTED_TYPES

Constructor Summary

Constructors

Constructor and Description
MatchPredicate()

Method Summary

Methods

Modifier and Type	Method and Description
static java.lang.String	fieldNameWithBoost(java.lang.String fieldName, java.lang.Object boost)
static java.lang.String	getMatchType(java.lang.String matchType, DataType columnType)
FunctionInfo	info()
Symbol	normalizeSymbol(Function function)
static void	register(PredicateModule module) the match predicate is registered as a regular function though it is called differently by the parser.

Methods inherited from class java.lang.Object

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

Field Detail

SUPPORTED_TYPES

public static final java.util.Set<DataType> SUPPORTED_TYPES

DEFAULT_MATCH_TYPE

public static final org.apache.lucene.util.BytesRef DEFAULT_MATCH_TYPE

NAME

public static final java.lang.String NAME

See Also:

Constant Field Values

IDENT

public static final FunctionIdent IDENT

INFO

public static final FunctionInfo INFO

Constructor Detail

MatchPredicate

public MatchPredicate()

Method Detail

fieldNameWithBoost

public static java.lang.String fieldNameWithBoost(java.lang.String fieldName,
                                  @Nullable
                                  java.lang.Object boost)

getMatchType

public static java.lang.String getMatchType(@Nullable
                            java.lang.String matchType,
                            DataType columnType)

register

public static void register(PredicateModule module)

the match predicate is registered as a regular function though it is called differently by the parser. We mangle the arguments and options for the match predicate into function arguments. 1. list of column idents and boost values - object mapping column name to boost value (Double) (values nullable) 2. query string - string 3. match_type - string (nullable) 4. match_type options - object mapping option name to value (Object) (nullable)

info

public FunctionInfo info()

Specified by:

info in interface FunctionImplementation<Function>

normalizeSymbol

public Symbol normalizeSymbol(Function function)

Specified by:

normalizeSymbol in interface FunctionImplementation<Function>