org.apache.drill.exec.expr.fn

Class DrillFuncHolder

java.lang.Object

org.apache.drill.exec.expr.fn.AbstractFuncHolder

org.apache.drill.exec.expr.fn.DrillFuncHolder

All Implemented Interfaces:

FuncHolder

Direct Known Subclasses:

DrillSimpleFuncHolder

public abstract class DrillFuncHolder
extends AbstractFuncHolder

Constructor Summary

Constructors

Constructor and Description
DrillFuncHolder(FunctionAttributes attributes, FunctionInitializer initializer)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addProtectedBlock(ClassGenerator<?> g, com.sun.codemodel.JBlock sub, String body, ClassGenerator.HoldingContainer[] inputVariables, com.sun.codemodel.JVar[] workspaceJVars, boolean decConstInputOnly)
boolean	checkPrecisionRange()
protected com.sun.codemodel.JVar[]	declareWorkspaceVariables(ClassGenerator<?> g)
protected void	generateBody(ClassGenerator<?> g, ClassGenerator.BlockType bt, String body, ClassGenerator.HoldingContainer[] inputVariables, com.sun.codemodel.JVar[] workspaceJVars, boolean decConstantInputOnly)
ClassLoader	getClassLoader()
int	getCostCategory()
FunctionHolderExpression	getExpr(String name, List<LogicalExpression> args, ExpressionPosition pos)
String	getInputParameters() Generates string representation of function input parameters: PARAMETER_TYPE_1-PARAMETER_MODE_1,PARAMETER_TYPE_2-PARAMETER_MODE_2 Example: VARCHAR-REQUIRED,VARCHAR-OPTIONAL Returns empty string if function has no input parameters.
FunctionTemplate.NullHandling	getNullHandling()
int	getParamCount()
ValueReference[]	getParameters()
TypeProtos.MajorType	getParmMajorType(int i)
String[]	getRegisteredNames()
TypeProtos.MajorType	getReturnType()
TypeProtos.MajorType	getReturnType(List<LogicalExpression> logicalExpressions)
ValueReference	getReturnValue()
WorkspaceReference[]	getWorkspaceVars()
boolean	isAggregating()
boolean	isConstant(int i)
boolean	isDeterministic()
boolean	isFieldReader(int i)
boolean	isNiladic()
boolean	matches(TypeProtos.MajorType returnType, List<TypeProtos.MajorType> argTypes)
protected String	meth(String methodName)
protected String	meth(String methodName, boolean required)
com.sun.codemodel.JVar[]	renderStart(ClassGenerator<?> g, ClassGenerator.HoldingContainer[] inputVariables)
String	toString()

Methods inherited from class org.apache.drill.exec.expr.fn.AbstractFuncHolder

isComplexWriterFuncHolder, isNested, renderEnd, renderMiddle

Methods inherited from class java.lang.Object

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

Constructor Detail

DrillFuncHolder

public DrillFuncHolder(FunctionAttributes attributes,
               FunctionInitializer initializer)

Method Detail

meth

protected String meth(String methodName)

meth

protected String meth(String methodName,
          boolean required)

renderStart

public com.sun.codemodel.JVar[] renderStart(ClassGenerator<?> g,
                                   ClassGenerator.HoldingContainer[] inputVariables)

Specified by:

renderStart in class AbstractFuncHolder

getExpr

public FunctionHolderExpression getExpr(String name,
                               List<LogicalExpression> args,
                               ExpressionPosition pos)

Specified by:

getExpr in class AbstractFuncHolder

isAggregating

public boolean isAggregating()

isDeterministic

public boolean isDeterministic()

isNiladic

public boolean isNiladic()

getInputParameters

public String getInputParameters()

Generates string representation of function input parameters: PARAMETER_TYPE_1-PARAMETER_MODE_1,PARAMETER_TYPE_2-PARAMETER_MODE_2 Example: VARCHAR-REQUIRED,VARCHAR-OPTIONAL Returns empty string if function has no input parameters.

Returns:

string representation of function input parameters

getClassLoader

public ClassLoader getClassLoader()

Returns:

instance of class loader used to load function

declareWorkspaceVariables

protected com.sun.codemodel.JVar[] declareWorkspaceVariables(ClassGenerator<?> g)

generateBody

protected void generateBody(ClassGenerator<?> g,
                ClassGenerator.BlockType bt,
                String body,
                ClassGenerator.HoldingContainer[] inputVariables,
                com.sun.codemodel.JVar[] workspaceJVars,
                boolean decConstantInputOnly)

addProtectedBlock

protected void addProtectedBlock(ClassGenerator<?> g,
                     com.sun.codemodel.JBlock sub,
                     String body,
                     ClassGenerator.HoldingContainer[] inputVariables,
                     com.sun.codemodel.JVar[] workspaceJVars,
                     boolean decConstInputOnly)

matches

public boolean matches(TypeProtos.MajorType returnType,
              List<TypeProtos.MajorType> argTypes)

getParmMajorType

public TypeProtos.MajorType getParmMajorType(int i)

Specified by:

getParmMajorType in class AbstractFuncHolder

getParamCount

public int getParamCount()

Specified by:

getParamCount in class AbstractFuncHolder

isConstant

public boolean isConstant(int i)

isFieldReader

public boolean isFieldReader(int i)

getReturnType

public TypeProtos.MajorType getReturnType(List<LogicalExpression> logicalExpressions)

getNullHandling

public FunctionTemplate.NullHandling getNullHandling()

getRegisteredNames

public String[] getRegisteredNames()

getCostCategory

public int getCostCategory()

getParameters

public ValueReference[] getParameters()

checkPrecisionRange

public boolean checkPrecisionRange()

getReturnType

public TypeProtos.MajorType getReturnType()

getReturnValue

public ValueReference getReturnValue()

getWorkspaceVars

public WorkspaceReference[] getWorkspaceVars()

toString

public String toString()

Overrides:

toString in class Object