io.crate.operation.scalar

Class DateTruncFunction

java.lang.Object

io.crate.metadata.Scalar<java.lang.Long,java.lang.Object>

io.crate.operation.scalar.DateTruncFunction

All Implemented Interfaces:

FunctionImplementation<Function>

public class DateTruncFunction
extends Scalar<java.lang.Long,java.lang.Object>

Field Summary

Fields

Modifier and Type	Field and Description
protected static com.google.common.collect.ImmutableMap<org.apache.lucene.util.BytesRef,org.elasticsearch.common.rounding.DateTimeUnit>	DATE_FIELD_PARSERS
static java.lang.String	NAME

Constructor Summary

Constructors

Constructor and Description
DateTruncFunction(FunctionInfo info)
DateTruncFunction(FunctionInfo info, org.elasticsearch.common.rounding.Rounding tzRounding)

Method Summary

Modifier and Type	Method and Description
Scalar<java.lang.Long,java.lang.Object>	compile(java.util.List<Symbol> arguments) Returns a optional compiled version of the scalar implementation.
java.lang.Long	evaluate(Input[] args)
FunctionInfo	info()
protected org.elasticsearch.common.rounding.DateTimeUnit	intervalAsUnit(org.apache.lucene.util.BytesRef interval)
Symbol	normalizeSymbol(Function symbol, TransactionContext transactionContext) Normalize a symbol into a simplified form.
static void	register(ScalarFunctionModule module)
protected org.elasticsearch.common.rounding.Rounding	rounding(org.apache.lucene.util.BytesRef interval, org.apache.lucene.util.BytesRef timeZoneString)
protected java.lang.Long	truncate(org.elasticsearch.common.rounding.Rounding rounding, java.lang.Long ts) Truncates given timestamp down to the given interval.

Methods inherited from class io.crate.metadata.Scalar

anyNonLiterals, containsNullLiteral

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

DATE_FIELD_PARSERS

protected static final com.google.common.collect.ImmutableMap<org.apache.lucene.util.BytesRef,org.elasticsearch.common.rounding.DateTimeUnit> DATE_FIELD_PARSERS

Constructor Detail

DateTruncFunction

public DateTruncFunction(FunctionInfo info)

DateTruncFunction

public DateTruncFunction(FunctionInfo info,
                         org.elasticsearch.common.rounding.Rounding tzRounding)

Method Detail

register

public static void register(ScalarFunctionModule module)

info

public FunctionInfo info()

compile

public Scalar<java.lang.Long,java.lang.Object> compile(java.util.List<Symbol> arguments)

Description copied from class: Scalar

Returns a optional compiled version of the scalar implementation.

Overrides:

compile in class Scalar<java.lang.Long,java.lang.Object>

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<Function>

Overrides:

normalizeSymbol in class Scalar<java.lang.Long,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

evaluate

public final java.lang.Long evaluate(Input[] args)

Specified by:

evaluate in class Scalar<java.lang.Long,java.lang.Object>

rounding

protected org.elasticsearch.common.rounding.Rounding rounding(org.apache.lucene.util.BytesRef interval,
                                                              org.apache.lucene.util.BytesRef timeZoneString)

truncate

protected java.lang.Long truncate(org.elasticsearch.common.rounding.Rounding rounding,
                                  java.lang.Long ts)

Truncates given timestamp down to the given interval. The timestamp is expected to be in milliseconds.

intervalAsUnit

protected org.elasticsearch.common.rounding.DateTimeUnit intervalAsUnit(org.apache.lucene.util.BytesRef interval)