org.apache.calcite.sql

Class SqlPostfixOperator

java.lang.Object

org.apache.calcite.sql.SqlOperator

org.apache.calcite.sql.SqlPostfixOperator

public class SqlPostfixOperator
extends SqlOperator

A postfix unary operator.

Field Summary

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

kind, MDX_PRECEDENCE, NL

Constructor Summary

Constructors

Constructor and Description
SqlPostfixOperator(String name, SqlKind kind, int prec, SqlReturnTypeInference returnTypeInference, SqlOperandTypeInference operandTypeInference, SqlOperandTypeChecker operandTypeChecker)

Method Summary

Methods

Modifier and Type	Method and Description
protected RelDataType	adjustType(SqlValidator validator, SqlCall call, RelDataType type) Validates and determines coercibility and resulting collation name of binary operator if needed.
String	getSignatureTemplate(int operandsCount) Returns a template describing how the operator signature is to be built.
SqlSyntax	getSyntax() Returns the syntactic type of this operator, never null.
boolean	validRexOperands(int count, boolean fail) Returns whether the given operands are valid.

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

acceptCall, acceptCall, allowsFraming, argumentMustBeScalar, checkOperandCount, checkOperandTypes, createCall, createCall, createCall, createCall, deriveType, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getName, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, hashCode, inferReturnType, inferReturnType, isAggregator, isDeterministic, isDynamicFunction, isName, leftPrec, preValidateCall, requiresDecimalExpansion, requiresOrder, rewriteCall, rightPrec, toString, unparse, unparseListClause, unparseListClause, validateCall, validateOperands

Methods inherited from class java.lang.Object

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

Constructor Detail

SqlPostfixOperator

public SqlPostfixOperator(String name,
                  SqlKind kind,
                  int prec,
                  SqlReturnTypeInference returnTypeInference,
                  SqlOperandTypeInference operandTypeInference,
                  SqlOperandTypeChecker operandTypeChecker)

Method Detail

getSyntax

public SqlSyntax getSyntax()

Description copied from class: SqlOperator

Returns the syntactic type of this operator, never null.

Specified by:

getSyntax in class SqlOperator

getSignatureTemplate

public String getSignatureTemplate(int operandsCount)

Description copied from class: SqlOperator

Returns a template describing how the operator signature is to be built. E.g for the binary + operator the template looks like "{1} {0} {2}" {0} is the operator, subsequent numbers are operands.

Overrides:

getSignatureTemplate in class SqlOperator

Parameters:

operandsCount - is used with functions that can take a variable number of operands

Returns:

signature template, or null to indicate that a default template will suffice

adjustType

protected RelDataType adjustType(SqlValidator validator,
                     SqlCall call,
                     RelDataType type)

Description copied from class: SqlOperator

Validates and determines coercibility and resulting collation name of binary operator if needed.

Overrides:

adjustType in class SqlOperator

validRexOperands

public boolean validRexOperands(int count,
                       boolean fail)

Description copied from class: SqlOperator

Returns whether the given operands are valid. If not valid and fail, throws an assertion error.

Similar to SqlOperator.checkOperandCount(org.apache.calcite.sql.validate.SqlValidator, org.apache.calcite.sql.type.SqlOperandTypeChecker, org.apache.calcite.sql.SqlCall), but some operators may have different valid operands in SqlNode and RexNode formats (some examples are CAST and AND), and this method throws internal errors, not user errors.

Overrides:

validRexOperands in class SqlOperator