Op0 |
Super class for operators that do not combine other operators
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Op1 |
Super class for operators that operate on a single sub-operation (i.e.
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Op2 |
Super class for operators that combine two sub-operators
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OpAssign |
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OpBase |
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OpBGP |
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OpConditional |
Conditional execution - works with streamed execution and is known to safe to
evaluate that way (no issues from nested optionals).
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OpDatasetNames |
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OpDiff |
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OpDisjunction |
N-way disjunction.
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OpDistinct |
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OpDistinctReduced |
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OpExt |
Marker for extension points
Execution will be per-engine specific
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OpExtend |
This is the operation in standard SPARQL 1.1 OpAssign is specifically in
support of LET.
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OpExtendAssign |
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OpFilter |
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OpGraph |
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OpGroup |
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OpJoin |
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OpLabel |
Do-nothing class that means that tags/labels/comments can be left in the algebra tree.
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OpLeftJoin |
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OpList |
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OpMinus |
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OpModifier |
Mark solution modifiers
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OpN |
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OpNull |
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OpOrder |
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OpPath |
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OpProcedure |
General procedure in algebra evaluation (a stored procedure facility)
Syntax (ARQ extension): CALL (?x, ?y+3)
See also the similar algebra form for property functions.
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OpProject |
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OpPropFunc |
Property functions (or any OpBGP replacement)
Execution will be per-engine specific
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OpQuad |
Algebra operation for a single quad.
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OpQuadBlock |
A list of quads.
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OpQuadPattern |
The main Op used in converting SPARQL algebra to quad form.
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OpReduced |
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OpSequence |
A "sequence" is a join-like operation where it is known that
the output of one step can be fed into the input of the next
(that is, no scoping issues arise).
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OpService |
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OpSlice |
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OpTable |
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OpTopN |
Top N from a stream of items - for small N, better than ORDER BY + LIMIT N
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OpTriple |
Algebra operation for a single triple.
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OpUnion |
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