Package org.apache.calcite.sql.fun

Class SqlCastFunction

java.lang.Object
org.apache.calcite.sql.SqlOperator
org.apache.calcite.sql.SqlFunction
org.apache.calcite.sql.fun.SqlCastFunction
public class SqlCastFunction extends org.apache.calcite.sql.SqlFunction
SqlCastFunction. Note that the std functions are really singleton objects, because they always get fetched via the StdOperatorTable. So you can't store any local info in the class and hence the return type data is maintained in operand[1] through the validation phase.

Can be used for both SqlCall and RexCall. Note that the SqlCall has two operands (expression and type), while the RexCall has one operand (expression) and the type is obtained from RexNode.getType().

The class was copied over because of CALCITE-5017, in order to workaround the method SqlTypeUtil.canCastFrom(RelDataType, RelDataType, boolean). Line 141 in checkOperandTypes(SqlCallBinding, boolean) and new method canCastFrom(RelDataType, RelDataType).

See Also:
  • SqlCastOperator

  • Field Summary

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

    kind, MDX_PRECEDENCE, NL

  • Constructor Summary

    Constructors
    Constructor
    Description
    SqlCastFunction()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    checkOperandTypes(org.apache.calcite.sql.SqlCallBinding callBinding, boolean throwOnFailure)
    Makes sure that the number and types of arguments are allowable.
    org.apache.calcite.sql.validate.SqlMonotonicity
    getMonotonicity(org.apache.calcite.sql.SqlOperatorBinding call)
     
    org.apache.calcite.sql.SqlOperandCountRange
    getOperandCountRange()
     
    String
    getSignatureTemplate(int operandsCount)
     
    org.apache.calcite.sql.SqlSyntax
    getSyntax()
     
    org.apache.calcite.rel.type.RelDataType
    inferReturnType(org.apache.calcite.sql.SqlOperatorBinding opBinding)
     
    void
    unparse(org.apache.calcite.sql.SqlWriter writer, org.apache.calcite.sql.SqlCall call, int leftPrec, int rightPrec)
     

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

    deriveType, getFunctionType, getNameAsId, getParamNames, getParamTypes, getSqlIdentifier, isQuantifierAllowed, validateCall, validateQuantifier

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

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

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • SqlCastFunction

      public SqlCastFunction()

  • Method Details

    • inferReturnType

      public org.apache.calcite.rel.type.RelDataType inferReturnType(org.apache.calcite.sql.SqlOperatorBinding opBinding)
      Overrides:
      inferReturnType in class org.apache.calcite.sql.SqlOperator

    • getSignatureTemplate

      public String getSignatureTemplate(int operandsCount)
      Overrides:
      getSignatureTemplate in class org.apache.calcite.sql.SqlOperator

    • getOperandCountRange

      public org.apache.calcite.sql.SqlOperandCountRange getOperandCountRange()
      Overrides:
      getOperandCountRange in class org.apache.calcite.sql.SqlOperator

    • checkOperandTypes

      public boolean checkOperandTypes(org.apache.calcite.sql.SqlCallBinding callBinding, boolean throwOnFailure)
      Makes sure that the number and types of arguments are allowable. Operators (such as "ROW" and "AS") which do not check their arguments can override this method.
      Overrides:
      checkOperandTypes in class org.apache.calcite.sql.SqlOperator

    • getSyntax

      public org.apache.calcite.sql.SqlSyntax getSyntax()
      Overrides:
      getSyntax in class org.apache.calcite.sql.SqlFunction

    • unparse

      public void unparse(org.apache.calcite.sql.SqlWriter writer, org.apache.calcite.sql.SqlCall call, int leftPrec, int rightPrec)
      Overrides:
      unparse in class org.apache.calcite.sql.SqlFunction

    • getMonotonicity

      public org.apache.calcite.sql.validate.SqlMonotonicity getMonotonicity(org.apache.calcite.sql.SqlOperatorBinding call)
      Overrides:
      getMonotonicity in class org.apache.calcite.sql.SqlOperator