public final class Lookup extends Arr
Constructor and Description |
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Lookup(InputInfo info,
Expr... expr)
Constructor.
|
Modifier and Type | Method and Description |
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Expr |
compile(QueryContext qc,
VarScope scp)
Compiles and optimizes the expression, assigns types and cardinalities.
|
Lookup |
copy(QueryContext qc,
VarScope scp,
IntObjMap<Var> vs)
Copies an expression.
|
boolean |
has(Expr.Flag flag)
Indicates if an expression has the specified compiler property.
|
ValueIter |
iter(QueryContext qc)
Evaluates the expression and returns an iterator on the resulting items.
|
Expr |
optimize(QueryContext qc,
VarScope scp)
Optimizes an already compiled expression without recompiling its sub-expressions.
|
String |
toString() |
accept, allAreValues, checkUp, copyAll, count, exprSize, inline, oneIsEmpty, plan, removable, toString
atomItem, atomValue, checkAtomic, checkNoEmpty, checkNoEmpty, checkNoneUp, checkNoUp, checkType, compBln, copyType, ctxValue, ebv, item, optPre, optPre, preEval, seqType, seqType, size, test, toArray, toArray, toAtomItem, toB64, toB64, toBin, toBin, toBoolean, toBoolean, toBytes, toBytes, toDouble, toDouble, toElem, toEmptyNode, toEmptyToken, toFloat, toFunc, toItem, toLong, toLong, toMap, toMap, toNode, toNode, toNumber, toQNm, toQNm, toToken, toToken, value
atomIter, data, hasFreeVars, indexAccessible, inlineAll, isEmpty, isFunction, isVacuous, isValue, iterable, markTailCalls, optimizeEbv, sameAs, typeCheck, uses, visitAll
addPlan, addPlan, description, planAttr, planElem, toErrorString
public Expr compile(QueryContext qc, VarScope scp) throws QueryException
Expr
QueryContext.compile()
.compile
in class Arr
qc
- query contextscp
- variable scopeQueryException
- query exceptionpublic Expr optimize(QueryContext qc, VarScope scp) throws QueryException
Expr
optimize
in class Expr
qc
- query contextscp
- variable scopeQueryException
- query exceptionpublic ValueIter iter(QueryContext qc) throws QueryException
Expr
Expr.item(QueryContext, InputInfo)
must be implemented
by an expression, as it may be called by this method.iter
in class ParseExpr
qc
- query contextQueryException
- query exceptionpublic boolean has(Expr.Flag flag)
Expr
true
if at least one test is successful.public Lookup copy(QueryContext qc, VarScope scp, IntObjMap<Var> vs)
Expr
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