- All Superinterfaces:
- All Known Implementing Classes:
public interface SqlSingleOperandTypeChecker extends SqlOperandTypeCheckerSqlSingleOperandTypeChecker is an extension of
SqlOperandTypeCheckerfor implementations which are capable of checking the type of a single operand in isolation. This isn't meaningful for all type-checking rules (e.g. SameOperandTypeChecker requires two operands to have matching types, so checking one in isolation is meaningless).
All Methods Instance Methods Abstract Methods Modifier and Type Method Description
checkSingleOperandType(SqlCallBinding callBinding, SqlNode operand, int iFormalOperand, boolean throwOnFailure)Checks the type of a single operand against a particular ordinal position within a formal operator signature.
boolean checkSingleOperandType(SqlCallBinding callBinding, SqlNode operand, int iFormalOperand, boolean throwOnFailure)Checks the type of a single operand against a particular ordinal position within a formal operator signature. Note that the actual ordinal position of the operand being checked may be different from the position of the formal operand.
For example, when validating the actual call
C(X, Y, Z)
the strategy for validating the operand Z might involve checking its type against the formal signature OP(W). In this case,
iFormalOperandwould be zero, even though the position of Z within call C is two.
callBinding- description of the call being checked; this is only provided for context when throwing an exception; the implementation should NOT examine the operands of the call as part of the check
operand- the actual operand to be checked
iFormalOperand- the 0-based formal operand ordinal
throwOnFailure- whether to throw an exception if check fails (otherwise returns false in that case)
- whether check succeeded