Package org.apache.drill.common.expression.visitors

Class ConditionalExprOptimizer

java.lang.Object

org.apache.drill.common.expression.visitors.AbstractExprVisitor<LogicalExpression,Void,RuntimeException>

org.apache.drill.common.expression.visitors.ConditionalExprOptimizer

All Implemented Interfaces:

ExprVisitor<LogicalExpression,Void,RuntimeException>

public class ConditionalExprOptimizer
extends AbstractExprVisitor<LogicalExpression,Void,RuntimeException>

Field Summary

Fields

Modifier and Type	Field	Description
static ConditionalExprOptimizer	INSTANCE

Constructor Summary

Constructors

Constructor	Description
ConditionalExprOptimizer()

Method Summary

Modifier and Type	Method	Description
LogicalExpression	visitAnyValueExpression(AnyValueExpression cast, Void value)
LogicalExpression	visitBooleanOperator(BooleanOperator op, Void value)
LogicalExpression	visitCastExpression(CastExpression cast, Void value)
LogicalExpression	visitConvertExpression(ConvertExpression cast, Void value)
LogicalExpression	visitFunctionCall(FunctionCall call, Void value)
LogicalExpression	visitFunctionHolderExpression(FunctionHolderExpression holder, Void value)
LogicalExpression	visitIfExpression(IfExpression ifExpr, Void value)
LogicalExpression	visitUnknown(LogicalExpression e, Void value)	Handles implementation-specific expressions not known to the visitor structure.

Methods inherited from class org.apache.drill.common.expression.visitors.AbstractExprVisitor

visitBooleanConstant, visitDateConstant, visitDecimal18Constant, visitDecimal28Constant, visitDecimal38Constant, visitDecimal9Constant, visitDoubleConstant, visitFloatConstant, visitIntConstant, visitIntervalDayConstant, visitIntervalYearConstant, visitLongConstant, visitNullConstant, visitNullExpression, visitParameter, visitQuotedStringConstant, visitSchemaPath, visitTimeConstant, visitTimeStampConstant, visitTypedFieldExpr, visitVarDecimalConstant

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static ConditionalExprOptimizer INSTANCE

Constructor Details

ConditionalExprOptimizer

public ConditionalExprOptimizer()

Method Details

visitBooleanOperator

public LogicalExpression visitBooleanOperator(BooleanOperator op,
 Void value)
                                       throws RuntimeException

Specified by:

visitBooleanOperator in interface ExprVisitor<LogicalExpression,Void,RuntimeException>

Overrides:

visitBooleanOperator in class AbstractExprVisitor<LogicalExpression,Void,RuntimeException>

Throws:

RuntimeException

visitFunctionHolderExpression

public LogicalExpression visitFunctionHolderExpression(FunctionHolderExpression holder,
 Void value)
                                                throws RuntimeException

Specified by:

visitFunctionHolderExpression in interface ExprVisitor<LogicalExpression,Void,RuntimeException>

Overrides:

visitFunctionHolderExpression in class AbstractExprVisitor<LogicalExpression,Void,RuntimeException>

Throws:

RuntimeException

visitUnknown

public LogicalExpression visitUnknown(LogicalExpression e,
 Void value)
                               throws RuntimeException

Description copied from class: AbstractExprVisitor

Handles implementation-specific expressions not known to the visitor structure. Since there are no "visitFoo" methods for these "unknown" expressions, subclassses should use the functionally-equivalent instanceof approach to parse out these "unknown" expressions.

Specified by:

visitUnknown in interface ExprVisitor<LogicalExpression,Void,RuntimeException>

Overrides:

visitUnknown in class AbstractExprVisitor<LogicalExpression,Void,RuntimeException>

Throws:

RuntimeException

visitIfExpression

public LogicalExpression visitIfExpression(IfExpression ifExpr,
 Void value)
                                    throws RuntimeException

Specified by:

visitIfExpression in interface ExprVisitor<LogicalExpression,Void,RuntimeException>

Overrides:

visitIfExpression in class AbstractExprVisitor<LogicalExpression,Void,RuntimeException>

Throws:

RuntimeException

visitFunctionCall

public LogicalExpression visitFunctionCall(FunctionCall call,
 Void value)
                                    throws RuntimeException

Specified by:

visitFunctionCall in interface ExprVisitor<LogicalExpression,Void,RuntimeException>

Overrides:

visitFunctionCall in class AbstractExprVisitor<LogicalExpression,Void,RuntimeException>

Throws:

RuntimeException

visitCastExpression

public LogicalExpression visitCastExpression(CastExpression cast,
 Void value)
                                      throws RuntimeException

Specified by:

visitCastExpression in interface ExprVisitor<LogicalExpression,Void,RuntimeException>

Overrides:

visitCastExpression in class AbstractExprVisitor<LogicalExpression,Void,RuntimeException>

Throws:

RuntimeException

visitConvertExpression

public LogicalExpression visitConvertExpression(ConvertExpression cast,
 Void value)
                                         throws RuntimeException

Specified by:

visitConvertExpression in interface ExprVisitor<LogicalExpression,Void,RuntimeException>

Overrides:

visitConvertExpression in class AbstractExprVisitor<LogicalExpression,Void,RuntimeException>

Throws:

RuntimeException

visitAnyValueExpression

public LogicalExpression visitAnyValueExpression(AnyValueExpression cast,
 Void value)
                                          throws RuntimeException

Specified by:

visitAnyValueExpression in interface ExprVisitor<LogicalExpression,Void,RuntimeException>

Overrides:

visitAnyValueExpression in class AbstractExprVisitor<LogicalExpression,Void,RuntimeException>

Throws:

RuntimeException