Package org.apache.calcite.sql

Class SqlPrefixOperator

java.lang.Object

org.apache.calcite.sql.SqlOperator

org.apache.calcite.sql.SqlPrefixOperator

Direct Known Subclasses:

SqlNewOperator, SqlProcedureCallOperator

public class SqlPrefixOperator
extends SqlOperator

A unary operator.

Field Summary

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

kind, MDX_PRECEDENCE, NL

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
protected RelDataType	adjustType(SqlValidator validator, SqlCall call, RelDataType type)	Validates and determines coercibility and resulting collation name of binary operator if needed.
SqlMonotonicity	getMonotonicity(SqlOperatorBinding call)	Returns whether a call to this operator is monotonic.
@Nullable 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, Litmus litmus)	Returns whether the given operands are valid.

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

acceptCall, acceptCall, allowsFraming, argumentMustBeScalar, checkOperandCount, checkOperandTypes, constructArgNameList, constructArgTypeList, constructOperandList, createCall, createCall, createCall, createCall, createCall, createCall, createCall, deriveOperandType, deriveType, equals, getAllowedSignatures, getAllowedSignatures, getKind, getLeftPrec, getMonotonicity, getName, getNameAsId, getOperandCountRange, getOperandTypeChecker, getOperandTypeInference, getReturnTypeInference, getRightPrec, getStrongPolicyInference, hashCode, inferReturnType, inferReturnType, isAggregator, isDeterministic, isDynamicFunction, isGroup, isGroupAuxiliary, isName, isSymmetrical, leftPrec, not, preValidateCall, requiresDecimalExpansion, requiresOrder, requiresOver, reverse, rewriteCall, rightPrec, toString, unparse, unparseListClause, unparseListClause, validateCall, validateOperands

Methods inherited from class java.lang.Object

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

Constructor Details

SqlPrefixOperator

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

Method Details

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 @Nullable 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(SqlOperatorBinding call)

Description copied from class: SqlOperator

Returns whether a call to this operator is monotonic.

Default implementation returns SqlMonotonicity.NOT_MONOTONIC.

Overrides:

getMonotonicity in class SqlOperator

Parameters:

call - Call to this operator with particular arguments and information about the monotonicity of the arguments

validRexOperands

public boolean validRexOperands(int count,
 Litmus litmus)

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