org.eigenbase.sql
Class SqlPrefixOperator

java.lang.Object
  org.eigenbase.sql.SqlOperator
      org.eigenbase.sql.SqlPrefixOperator

Direct Known Subclasses:

SqlNewOperator, SqlProcedureCallOperator

public class SqlPrefixOperator
extends SqlOperator

A unary operator.

Field Summary

Fields inherited from class org.eigenbase.sql.SqlOperator

MaxPrec, NL

Constructor Summary

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

Method Summary

protected RelDataType	adjustType(SqlValidator validator, SqlCall call, RelDataType type) Validates and determines coercibility and resulting collation name of binary operator if needed.
SqlMonotonicity	getMonotonicity(SqlCall call, SqlValidatorScope scope) Returns whether this operator is monotonic.
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.

Methods inherited from class org.eigenbase.sql.SqlOperator

acceptCall, acceptCall, argumentMustBeScalar, checkOperandCount, checkOperandTypes, createCall, createCall, createCall, createCall, deriveType, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getName, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, hashCode, inferReturnType, inferReturnType, isAggregator, isDeterministic, isDynamicFunction, isName, leftPrec, preValidateCall, requiresDecimalExpansion, 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

SqlPrefixOperator

public SqlPrefixOperator(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.

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

getMonotonicity

public SqlMonotonicity getMonotonicity(SqlCall call,
                                       SqlValidatorScope scope)

Description copied from class: SqlOperator

Returns whether this operator is monotonic.

Default implementation returns SqlMonotonicity.NotMonotonic.

Overrides:

getMonotonicity in class SqlOperator

Parameters:

call - Call to this operator

scope - Scope in which the call occurs