org.apache.calcite.sql

Class SqlInternalOperator

java.lang.Object

org.apache.calcite.sql.SqlOperator

org.apache.calcite.sql.SqlSpecialOperator

org.apache.calcite.sql.SqlInternalOperator

public class SqlInternalOperator
extends SqlSpecialOperator

Generic operator for nodes with internal syntax.

If you do not override getSyntax() or SqlOperator.unparse(SqlWriter, SqlCall, int, int), they will be unparsed using function syntax, F(arg1, arg2, ...). This may be OK for operators that never appear in SQL, only as structural elements in an abstract syntax tree.

You can use this operator, without creating a sub-class, for non-expression nodes. Validate will validate the arguments, but will not attempt to deduce a type.

Field Summary

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

kind, MDX_PRECEDENCE, NL

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
RelDataType	deriveType(SqlValidator validator, SqlValidatorScope scope, SqlCall call) Derives the type of a call to this operator.
SqlSyntax	getSyntax() Returns the syntactic type of this operator, never null.

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

reduceExpr

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

SqlInternalOperator

public SqlInternalOperator(String name,
                   SqlKind kind)

SqlInternalOperator

public SqlInternalOperator(String name,
                   SqlKind kind,
                   int prec)

SqlInternalOperator

public SqlInternalOperator(String name,
                   SqlKind kind,
                   int prec,
                   boolean isLeftAssoc,
                   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.

Overrides:

getSyntax in class SqlSpecialOperator

deriveType

public RelDataType deriveType(SqlValidator validator,
                     SqlValidatorScope scope,
                     SqlCall call)

Description copied from class: SqlOperator

Derives the type of a call to this operator.

This method is an intrinsic part of the validation process so, unlike SqlOperator.inferReturnType(org.apache.calcite.sql.SqlOperatorBinding), specific operators would not typically override this method.

Overrides:

deriveType in class SqlOperator

Parameters:

validator - Validator

scope - Scope of validation

call - Call to this operator

Returns:

Type of call