org.apache.drill.exec.planner.sql

Class DrillCalciteSqlFunctionWrapper

java.lang.Object

org.apache.calcite.sql.SqlOperator

org.apache.calcite.sql.SqlFunction

org.apache.drill.exec.planner.sql.DrillCalciteSqlFunctionWrapper

All Implemented Interfaces:

DrillCalciteSqlWrapper

public class DrillCalciteSqlFunctionWrapper
extends org.apache.calcite.sql.SqlFunction
implements DrillCalciteSqlWrapper

This class serves as a wrapper class for SqlFunction. The motivation is to plug-in the return type inference and operand type check algorithms of Drill into Calcite's sql validation procedure. Except for the methods which are relevant to the return type inference and operand type check algorithms, the wrapper simply forwards the method calls to the wrapped SqlFunction.

Field Summary

Fields inherited from class org.apache.calcite.sql.SqlOperator

kind, MDX_PRECEDENCE, NL

Constructor Summary

Constructors

Constructor and Description
DrillCalciteSqlFunctionWrapper(org.apache.calcite.sql.SqlFunction wrappedFunction, List<DrillFuncHolder> functions)

Method Summary

Modifier and Type	Method and Description
boolean	argumentMustBeScalar(int ordinal)
boolean	checkOperandTypes(org.apache.calcite.sql.SqlCallBinding callBinding, boolean throwOnFailure)
org.apache.calcite.rel.type.RelDataType	deriveType(org.apache.calcite.sql.validate.SqlValidator validator, org.apache.calcite.sql.validate.SqlValidatorScope scope, org.apache.calcite.sql.SqlCall call)
String	getAllowedSignatures(String opNameToUse)
org.apache.calcite.sql.validate.SqlMonotonicity	getMonotonicity(org.apache.calcite.sql.SqlOperatorBinding call)
org.apache.calcite.sql.SqlOperator	getOperator() Get the wrapped SqlOperator
List<String>	getParamNames()
String	getSignatureTemplate(int operandsCount)
org.apache.calcite.sql.SqlSyntax	getSyntax()
boolean	isDeterministic()
boolean	isDynamicFunction()
boolean	requiresDecimalExpansion()
org.apache.calcite.sql.SqlNode	rewriteCall(org.apache.calcite.sql.validate.SqlValidator validator, org.apache.calcite.sql.SqlCall call)
String	toString()
void	unparse(org.apache.calcite.sql.SqlWriter writer, org.apache.calcite.sql.SqlCall call, int leftPrec, int rightPrec)
boolean	validRexOperands(int count, org.apache.calcite.util.Litmus litmus)

Methods inherited from class org.apache.calcite.sql.SqlFunction

getFunctionType, getNameAsId, getParamTypes, getSqlIdentifier, isQuantifierAllowed, validateCall, validateQuantifier

Methods inherited from class org.apache.calcite.sql.SqlOperator

acceptCall, acceptCall, adjustType, allowsFraming, checkOperandCount, constructArgNameList, constructArgTypeList, constructOperandList, createCall, createCall, createCall, createCall, equals, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getName, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, hashCode, inferReturnType, inferReturnType, isAggregator, isGroup, isGroupAuxiliary, isName, leftPrec, preValidateCall, requiresOrder, requiresOver, rightPrec, unparseListClause, unparseListClause, validateOperands

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DrillCalciteSqlFunctionWrapper

public DrillCalciteSqlFunctionWrapper(org.apache.calcite.sql.SqlFunction wrappedFunction,
                                      List<DrillFuncHolder> functions)

Method Detail

rewriteCall

public org.apache.calcite.sql.SqlNode rewriteCall(org.apache.calcite.sql.validate.SqlValidator validator,
                                                  org.apache.calcite.sql.SqlCall call)

Overrides:

rewriteCall in class org.apache.calcite.sql.SqlOperator

getOperator

public org.apache.calcite.sql.SqlOperator getOperator()

Description copied from interface: DrillCalciteSqlWrapper

Get the wrapped SqlOperator

Specified by:

getOperator in interface DrillCalciteSqlWrapper

Returns:

SqlOperator get the wrapped SqlOperator

validRexOperands

public boolean validRexOperands(int count,
                                org.apache.calcite.util.Litmus litmus)

Overrides:

validRexOperands in class org.apache.calcite.sql.SqlOperator

getAllowedSignatures

public String getAllowedSignatures(String opNameToUse)

Overrides:

getAllowedSignatures in class org.apache.calcite.sql.SqlOperator

getMonotonicity

public org.apache.calcite.sql.validate.SqlMonotonicity getMonotonicity(org.apache.calcite.sql.SqlOperatorBinding call)

Overrides:

getMonotonicity in class org.apache.calcite.sql.SqlOperator

isDeterministic

public boolean isDeterministic()

Overrides:

isDeterministic in class org.apache.calcite.sql.SqlOperator

isDynamicFunction

public boolean isDynamicFunction()

Overrides:

isDynamicFunction in class org.apache.calcite.sql.SqlOperator

requiresDecimalExpansion

public boolean requiresDecimalExpansion()

Overrides:

requiresDecimalExpansion in class org.apache.calcite.sql.SqlOperator

argumentMustBeScalar

public boolean argumentMustBeScalar(int ordinal)

Overrides:

argumentMustBeScalar in class org.apache.calcite.sql.SqlOperator

checkOperandTypes

public boolean checkOperandTypes(org.apache.calcite.sql.SqlCallBinding callBinding,
                                 boolean throwOnFailure)

Overrides:

checkOperandTypes in class org.apache.calcite.sql.SqlOperator

getSyntax

public org.apache.calcite.sql.SqlSyntax getSyntax()

Overrides:

getSyntax in class org.apache.calcite.sql.SqlFunction

getParamNames

public List<String> getParamNames()

Overrides:

getParamNames in class org.apache.calcite.sql.SqlFunction

getSignatureTemplate

public String getSignatureTemplate(int operandsCount)

Overrides:

getSignatureTemplate in class org.apache.calcite.sql.SqlOperator

deriveType

public org.apache.calcite.rel.type.RelDataType deriveType(org.apache.calcite.sql.validate.SqlValidator validator,
                                                          org.apache.calcite.sql.validate.SqlValidatorScope scope,
                                                          org.apache.calcite.sql.SqlCall call)

Overrides:

deriveType in class org.apache.calcite.sql.SqlFunction

toString

public String toString()

Overrides:

toString in class org.apache.calcite.sql.SqlOperator

unparse

public void unparse(org.apache.calcite.sql.SqlWriter writer,
                    org.apache.calcite.sql.SqlCall call,
                    int leftPrec,
                    int rightPrec)

Overrides:

unparse in class org.apache.calcite.sql.SqlFunction