org.apache.hadoop.hive.ql.exec.vector.expressions

Class AbstractFilterStringColLikeStringScalar

java.lang.Object

org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression

org.apache.hadoop.hive.ql.exec.vector.expressions.AbstractFilterStringColLikeStringScalar

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

FilterStringColLikeStringScalar, FilterStringColRegExpStringScalar

public abstract class AbstractFilterStringColLikeStringScalar
extends VectorExpression

An abstract class for LIKE and REGEXP expressions. LIKE and REGEXP expression share similar functions, but they have different grammars. AbstractFilterStringColLikeStringScalar class provides shared classes and methods. Each subclass handles its grammar.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	AbstractFilterStringColLikeStringScalar.BeginChecker Matches the beginning of each string to a pattern.
protected static class	AbstractFilterStringColLikeStringScalar.ChainedChecker Matches a chained sequence of checkers.
static interface	AbstractFilterStringColLikeStringScalar.Checker A Checker contains a pattern and checks whether a given string matches or not.
protected static interface	AbstractFilterStringColLikeStringScalar.CheckerFactory A CheckerFactory creates checkers of its kind.
protected static class	AbstractFilterStringColLikeStringScalar.ComplexChecker Matches each string to a pattern with Java regular expression package.
protected static class	AbstractFilterStringColLikeStringScalar.EndChecker Matches the ending of each string to its pattern.
protected static class	AbstractFilterStringColLikeStringScalar.MiddleChecker Matches the middle of each string to its pattern.
protected static class	AbstractFilterStringColLikeStringScalar.NoneChecker Matches the whole string to its pattern.

Field Summary

Fields inherited from class org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression

childExpressions, inputColumnNum, inputDataTypePhysicalVariations, inputTypeInfos, LOG, outputColumnNum, outputDataTypePhysicalVariation, outputTypeInfo

Constructor Summary

Constructors

Constructor and Description
AbstractFilterStringColLikeStringScalar()
AbstractFilterStringColLikeStringScalar(int colNum, String pattern)

Method Summary

Modifier and Type	Method and Description
void	evaluate(VectorizedRowBatch batch) This is the primary method to implement expression logic.
protected abstract List<AbstractFilterStringColLikeStringScalar.CheckerFactory>	getCheckerFactories()
VectorExpressionDescriptor.Descriptor	getDescriptor()
String	getPattern()
void	setPattern(String pattern)
void	transientInit(org.apache.hadoop.conf.Configuration conf)
String	vectorExpressionParameters()

Methods inherited from class org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression

displayArrayOfUtf8ByteArrays, displayUtf8Bytes, doTransientInit, doTransientInit, evaluateChildren, getChildExpressions, getChildExpressionsForTransientInit, getColumnParamString, getDoubleValueParamString, getInputDataTypePhysicalVariations, getInputTypeInfos, getLongValueParamString, getOutputColumnNum, getOutputColumnVectorType, getOutputDataTypePhysicalVariation, getOutputTypeInfo, getParamTypeString, getTypeName, init, setChildExpressions, setInputDataTypePhysicalVariations, setInputTypeInfos, setOutputDataTypePhysicalVariation, setOutputTypeInfo, shouldConvertDecimal64ToDecimal, supportsCheckedExecution, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractFilterStringColLikeStringScalar

public AbstractFilterStringColLikeStringScalar(int colNum,
                                               String pattern)

AbstractFilterStringColLikeStringScalar

public AbstractFilterStringColLikeStringScalar()

Method Detail

transientInit

public void transientInit(org.apache.hadoop.conf.Configuration conf)
                   throws HiveException

Overrides:

transientInit in class VectorExpression

Throws:

HiveException

getCheckerFactories

protected abstract List<AbstractFilterStringColLikeStringScalar.CheckerFactory> getCheckerFactories()

evaluate

public void evaluate(VectorizedRowBatch batch)
              throws HiveException

Description copied from class: VectorExpression

This is the primary method to implement expression logic.

Specified by:

evaluate in class VectorExpression

Throws:

HiveException

getPattern

public String getPattern()

setPattern

public void setPattern(String pattern)

vectorExpressionParameters

public String vectorExpressionParameters()

Specified by:

vectorExpressionParameters in class VectorExpression

getDescriptor

public VectorExpressionDescriptor.Descriptor getDescriptor()

Specified by:

getDescriptor in class VectorExpression