org.apache.drill.exec.planner.sql

Class DrillCalciteSqlBetweenOperatorWrapper

java.lang.Object

org.apache.calcite.sql.SqlOperator

org.apache.calcite.sql.SqlSpecialOperator

org.apache.calcite.sql.SqlInfixOperator

org.apache.calcite.sql.fun.SqlBetweenOperator

org.apache.drill.exec.planner.sql.DrillCalciteSqlBetweenOperatorWrapper

All Implemented Interfaces:

DrillCalciteSqlWrapper

public class DrillCalciteSqlBetweenOperatorWrapper
extends org.apache.calcite.sql.fun.SqlBetweenOperator
implements DrillCalciteSqlWrapper

This class serves as a wrapper class for SqlBetweenOperator. 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 SqlOperator. Note that SqlBetweenOperator cannot be wrapped in DrillCalciteSqlOperatorWrapper. The reason is when RexNode conversion is happening, StandardConvertletTable.convertBetween expects the SqlOperator to be a subclass of SqlBetweenOperator.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.sql.fun.SqlBetweenOperator

org.apache.calcite.sql.fun.SqlBetweenOperator.Flag

Nested classes/interfaces inherited from class org.apache.calcite.sql.SqlSpecialOperator

org.apache.calcite.sql.SqlSpecialOperator.ReduceResult, org.apache.calcite.sql.SqlSpecialOperator.TokenSequence

Field Summary

Fields inherited from class org.apache.calcite.sql.fun.SqlBetweenOperator

flag, LOWER_OPERAND, UPPER_OPERAND, VALUE_OPERAND

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

kind, MDX_PRECEDENCE, NL

Constructor Summary

Constructors

Constructor and Description
DrillCalciteSqlBetweenOperatorWrapper(org.apache.calcite.sql.fun.SqlBetweenOperator sqlBetweenOperator)

Method Summary

Modifier and Type	Method and Description
boolean	checkOperandTypes(org.apache.calcite.sql.SqlCallBinding callBinding, boolean throwOnFailure) Since Calcite has its rule for type compatibility (see SqlTypeUtil.isComparable(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.rel.type.RelDataType)), which is usually different from Drill's, this method is overridden here to avoid Calcite early terminating the queries.
org.apache.calcite.sql.SqlOperator	getOperator() Get the wrapped SqlOperator

Methods inherited from class org.apache.calcite.sql.fun.SqlBetweenOperator

getName, getSignatureTemplate, inferReturnType, isNegated, reduceExpr, unparse

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

getSyntax

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

acceptCall, acceptCall, adjustType, allowsFraming, argumentMustBeScalar, checkOperandCount, constructArgNameList, constructArgTypeList, constructOperandList, createCall, createCall, createCall, createCall, deriveType, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getMonotonicity, getNameAsId, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, hashCode, inferReturnType, isAggregator, isDeterministic, isDynamicFunction, isGroup, isGroupAuxiliary, isName, leftPrec, preValidateCall, requiresDecimalExpansion, requiresOrder, requiresOver, rewriteCall, rightPrec, toString, unparseListClause, unparseListClause, validateCall, validateOperands, validRexOperands

Methods inherited from class java.lang.Object

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

Constructor Detail

DrillCalciteSqlBetweenOperatorWrapper

public DrillCalciteSqlBetweenOperatorWrapper(org.apache.calcite.sql.fun.SqlBetweenOperator sqlBetweenOperator)

Method Detail

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

checkOperandTypes

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

Since Calcite has its rule for type compatibility (see SqlTypeUtil.isComparable(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.rel.type.RelDataType)), which is usually different from Drill's, this method is overridden here to avoid Calcite early terminating the queries.

Overrides:

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