Examples with Expression org.apache.asterix.lang.common.base.Expression used on opensource projects

Example 56 with Expression

use of org.apache.asterix.lang.common.base.Expression in project asterixdb by apache.

the class CloneAndSubstituteVariablesVisitor method visit.

@Override
public Pair<ILangExpression, VariableSubstitutionEnvironment> visit(LimitClause lc, VariableSubstitutionEnvironment env) throws CompilationException {
    Pair<ILangExpression, VariableSubstitutionEnvironment> p1 = lc.getLimitExpr().accept(this, env);
    Pair<ILangExpression, VariableSubstitutionEnvironment> p2;
    Expression lcOffsetExpr = lc.getOffset();
    if (lcOffsetExpr != null) {
        p2 = lcOffsetExpr.accept(this, env);
    } else {
        p2 = new Pair<>(null, null);
    }
    LimitClause c = new LimitClause((Expression) p1.first, (Expression) p2.first);
    return new Pair<>(c, env);
}

Example 57 with Expression

use of org.apache.asterix.lang.common.base.Expression in project asterixdb by apache.

the class QueryPrintVisitor method visit.

@Override
public Void visit(ListConstructor lc, Integer step) throws CompilationException {
    boolean ordered = false;
    if (lc.getType().equals(ListConstructor.Type.ORDERED_LIST_CONSTRUCTOR)) {
        ordered = true;
    }
    out.println(skip(step) + (ordered == true ? "OrderedListConstructor " : "UnorderedListConstructor ") + "[");
    for (Expression e : lc.getExprList()) {
        e.accept(this, step + 1);
    }
    out.println(skip(step) + "]");
    return null;
}

Example 58 with Expression

use of org.apache.asterix.lang.common.base.Expression in project asterixdb by apache.

the class CloneAndSubstituteVariablesVisitor method visit.

@Override
public Pair<ILangExpression, VariableSubstitutionEnvironment> visit(OrderbyClause oc, VariableSubstitutionEnvironment env) throws CompilationException {
    List<Expression> exprList = VariableCloneAndSubstitutionUtil.visitAndCloneExprList(oc.getOrderbyList(), env, this);
    OrderbyClause oc2 = new OrderbyClause(exprList, oc.getModifierList());
    oc2.setNumFrames(oc.getNumFrames());
    oc2.setNumTuples(oc.getNumTuples());
    oc2.setRangeMap(oc.getRangeMap());
    return new Pair<>(oc2, env);
}

Example 59 with Expression

use of org.apache.asterix.lang.common.base.Expression in project asterixdb by apache.

the class CloneAndSubstituteVariablesVisitor method visit.

@Override
public Pair<ILangExpression, VariableSubstitutionEnvironment> visit(IndexAccessor ia, VariableSubstitutionEnvironment env) throws CompilationException {
    Pair<ILangExpression, VariableSubstitutionEnvironment> p1 = ia.getExpr().accept(this, env);
    Expression indexExpr = null;
    if (!ia.isAny()) {
        Pair<ILangExpression, VariableSubstitutionEnvironment> p2 = ia.getIndexExpr().accept(this, env);
        indexExpr = (Expression) p2.first;
    }
    IndexAccessor i = new IndexAccessor((Expression) p1.first, indexExpr);
    i.setAny(ia.isAny());
    return new Pair<>(i, env);
}

Example 60 with Expression

use of org.apache.asterix.lang.common.base.Expression in project asterixdb by apache.

the class CloneAndSubstituteVariablesVisitor method visit.

@Override
public Pair<ILangExpression, VariableSubstitutionEnvironment> visit(GroupbyClause gc, VariableSubstitutionEnvironment env) throws CompilationException {
    VariableSubstitutionEnvironment newSubs = env;
    List<GbyVariableExpressionPair> newGbyList = VariableCloneAndSubstitutionUtil.substInVarExprPair(context, gc.getGbyPairList(), newSubs, this);
    List<GbyVariableExpressionPair> newDecorList = gc.hasDecorList() ? VariableCloneAndSubstitutionUtil.substInVarExprPair(context, gc.getDecorPairList(), newSubs, this) : new ArrayList<>();
    VariableExpr newGroupVar = null;
    if (gc.hasGroupVar()) {
        newGroupVar = generateNewVariable(context, gc.getGroupVar());
    }
    Map<Expression, VariableExpr> newWithMap = new HashMap<>();
    if (gc.hasWithMap()) {
        for (Entry<Expression, VariableExpr> entry : gc.getWithVarMap().entrySet()) {
            Expression newKeyVar = (Expression) entry.getKey().accept(this, env).first;
            VariableExpr newValueVar = generateNewVariable(context, entry.getValue());
            newWithMap.put(newKeyVar, newValueVar);
        }
    }
    List<Pair<Expression, Identifier>> newGroupFieldList = new ArrayList<>();
    if (gc.hasGroupFieldList()) {
        for (Pair<Expression, Identifier> varId : gc.getGroupFieldList()) {
            Expression newExpr = (Expression) varId.first.accept(this, env).first;
            newGroupFieldList.add(new Pair<>(newExpr, varId.second));
        }
    }
    GroupbyClause newGroup = new GroupbyClause(newGbyList, newDecorList, newWithMap, newGroupVar, newGroupFieldList, gc.hasHashGroupByHint(), gc.isGroupAll());
    return new Pair<>(newGroup, newSubs);
}