io.crate.expression.scalar.regex

Class MatchesFunction

java.lang.Object

io.crate.metadata.Scalar<org.apache.lucene.util.BytesRef[],java.lang.Object>

io.crate.expression.scalar.regex.MatchesFunction

All Implemented Interfaces:

FunctionImplementation

public class MatchesFunction
extends Scalar<org.apache.lucene.util.BytesRef[],java.lang.Object>

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	NAME

Method Summary

Modifier and Type	Method and Description
Scalar<org.apache.lucene.util.BytesRef[],java.lang.Object>	compile(java.util.List<Symbol> arguments) Called to return a "optimized" version of a scalar implementation.
org.apache.lucene.util.BytesRef[]	evaluate(Input[] args) Evaluate the function using the provided arguments
FunctionInfo	info() Provides meta information about this function implementation.
Symbol	normalizeSymbol(Function symbol, TransactionContext transactionContext) Normalize a symbol into a simplified form.
static void	register(ScalarFunctionModule module)

Methods inherited from class io.crate.metadata.Scalar

anyNonLiterals, evaluateIfLiterals, withOperator

Methods inherited from class java.lang.Object

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

Field Detail

NAME

public static final java.lang.String NAME

See Also:

Constant Field Values

Method Detail

register

public static void register(ScalarFunctionModule module)

info

public FunctionInfo info()

Description copied from interface: FunctionImplementation

Provides meta information about this function implementation.

normalizeSymbol

public Symbol normalizeSymbol(Function symbol,
                              TransactionContext transactionContext)

Description copied from interface: FunctionImplementation

Normalize a symbol into a simplified form. This may return the symbol as is if it cannot be normalized.

Specified by:

normalizeSymbol in interface FunctionImplementation

Overrides:

normalizeSymbol in class Scalar<org.apache.lucene.util.BytesRef[],java.lang.Object>

transactionContext - context which is shared across normalizeSymbol calls during a statement-lifecycle. This will only be present if normalizeSymbol is called on the handler node. normalizeSymbol calls during execution won't receive a StmtCtx

compile

public Scalar<org.apache.lucene.util.BytesRef[],java.lang.Object> compile(java.util.List<Symbol> arguments)

Description copied from class: Scalar

Called to return a "optimized" version of a scalar implementation. The returned instance will only be used in the context of a single query (or rather, a subset of a single query if executed distributed).

Overrides:

compile in class Scalar<org.apache.lucene.util.BytesRef[],java.lang.Object>

Parameters:

arguments - arguments in symbol form. If any symbols are literals, any arguments passed to Scalar.evaluate(Input[]) will have the same value as those literals. (Within the scope of a single operation)

evaluate

public org.apache.lucene.util.BytesRef[] evaluate(Input[] args)

Description copied from class: Scalar

Evaluate the function using the provided arguments

Specified by:

evaluate in class Scalar<org.apache.lucene.util.BytesRef[],java.lang.Object>