sealed abstract class RelOp extends AnyRef
Abstract base class for all relational operators
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Abstract Value Members
- abstract val arity: Int
Arity of the operator (that is, number of inputs)
- abstract def isLocEvaluable(loc: Location): Boolean
Is this operator evaluable at the given location?
Is this operator evaluable at the given location?
- loc
Location
- abstract def isStreamEvaluable(inputs: List[RelExpr]): Boolean
Is this operator evaluable over the input stream?
Is this operator evaluable over the input stream?
- inputs
Input expressions
- abstract def locationIdOpt(inputs: List[RelExpr]): Option[LocationId]
The location where this operator can be evaluated
The location where this operator can be evaluated
- inputs
Input expressions
- returns
Location where this operator can be evaluated (if any)
- abstract def resultOrder(inputs: List[RelExpr]): List[SortExpr]
The sort order of the result of this operator
The sort order of the result of this operator
- inputs
Input expressions
- returns
Sort order of the result of this operator (if any)
- abstract def starColumns(inputs: List[RelExpr]): List[AnnotColRef]
The columns in the result of "select *" over this operator
The columns in the result of "select *" over this operator
- inputs
Input expressions
- returns
Columns in the result of "select *" over this operator
- abstract def tableColRefs(inputs: List[RelExpr]): List[ColRef]
The column names in the result of this operator
The column names in the result of this operator
- inputs
Input expressions
- returns
Columns names in the result of this operator
- abstract def tableNames(inputs: List[RelExpr]): List[String]
The table names in the scope of the result of this operator
The table names in the scope of the result of this operator
- inputs
Input expressions
- returns
Table names in the scope of the result of this operator
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- final def !=(arg0: Any): Boolean
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