public final class CmpR extends Single
Modifier and Type | Method and Description |
---|---|
Expr |
copy(QueryContext qc,
VarScope scp,
IntObjMap<Var> vs)
Copies an expression.
|
boolean |
indexAccessible(IndexInfo ii)
Checks if an expression can be rewritten to an index access.
|
Bln |
item(QueryContext qc,
InputInfo ii)
Evaluates the expression and returns the resulting item,
or a
null reference if the expression yields an empty sequence. |
Expr |
optimize(QueryContext qc,
VarScope scp)
Optimizes an already compiled expression without recompiling its sub-expressions.
|
void |
plan(FElem plan)
Creates an expression tree.
|
String |
toString() |
accept, checkUp, compile, count, exprSize, has, inline, removable
atomItem, atomValue, checkAtomic, checkNoEmpty, checkNoEmpty, checkNoneUp, checkNoUp, checkType, compBln, copyType, ctxValue, ebv, iter, 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, inlineAll, isEmpty, isFunction, isVacuous, isValue, iterable, markTailCalls, optimizeEbv, sameAs, typeCheck, uses, visitAll
addPlan, addPlan, description, planAttr, planElem, toErrorString
public Expr optimize(QueryContext qc, VarScope scp) throws QueryException
Expr
optimize
in class Expr
qc
- query contextscp
- variable scopeQueryException
- query exceptionpublic Bln item(QueryContext qc, InputInfo ii) throws QueryException
Expr
null
reference if the expression yields an empty sequence.
If this method is not overwritten, Expr.iter(QueryContext)
must be implemented by an
expression, as it may be called by this method.item
in class ParseExpr
qc
- query contextii
- input infonull
QueryException
- query exceptionpublic boolean indexAccessible(IndexInfo ii)
Expr
IndexInfo.expr
.
This method will be called by Path.index(org.basex.query.QueryContext, org.basex.query.value.Value)
.indexAccessible
in class Expr
ii
- index infopublic Expr copy(QueryContext qc, VarScope scp, IntObjMap<Var> vs)
Expr
public void plan(FElem plan)
ExprInfo
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