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

Example 66 with Expression

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

the class VariableCloneAndSubstitutionUtil method visitAndCloneExprList.

public static List<Expression> visitAndCloneExprList(List<Expression> oldExprList, VariableSubstitutionEnvironment arg, CloneAndSubstituteVariablesVisitor visitor) throws CompilationException {
    List<Expression> exprs = new ArrayList<>(oldExprList.size());
    for (Expression e : oldExprList) {
        Pair<ILangExpression, VariableSubstitutionEnvironment> p1 = e.accept(visitor, arg);
        exprs.add((Expression) p1.first);
    }
    return exprs;
}

Example 67 with Expression

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

the class AbstractInlineUdfsVisitor method visit.

@Override
public Boolean visit(RecordConstructor rc, List<FunctionDecl> arg) throws CompilationException {
    boolean changed = false;
    for (FieldBinding b : rc.getFbList()) {
        Pair<Boolean, Expression> leftExprInlined = inlineUdfsInExpr(b.getLeftExpr(), arg);
        b.setLeftExpr(leftExprInlined.second);
        changed = changed || leftExprInlined.first;
        Pair<Boolean, Expression> rightExprInlined = inlineUdfsInExpr(b.getRightExpr(), arg);
        b.setRightExpr(rightExprInlined.second);
        changed = changed || rightExprInlined.first;
    }
    return changed;
}

Example 68 with Expression

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

the class AbstractInlineUdfsVisitor method visit.

@Override
public Boolean visit(GroupbyClause gc, List<FunctionDecl> arg) throws CompilationException {
    boolean changed = false;
    for (GbyVariableExpressionPair p : gc.getGbyPairList()) {
        Pair<Boolean, Expression> be = inlineUdfsInExpr(p.getExpr(), arg);
        p.setExpr(be.second);
        if (be.first) {
            changed = true;
        }
    }
    for (GbyVariableExpressionPair p : gc.getDecorPairList()) {
        Pair<Boolean, Expression> be = inlineUdfsInExpr(p.getExpr(), arg);
        p.setExpr(be.second);
        if (be.first) {
            changed = true;
        }
    }
    return changed;
}

Example 69 with Expression

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

the class ClauseComparator method extractLetBindingVariables.

// Extracts the variables to be substituted.
private Map<VariableExpr, Expression> extractLetBindingVariables(List<Clause> clauses, GroupbyClause cuttingGbyClause) throws CompilationException {
    Map<VariableExpr, Expression> varExprMap = new HashMap<VariableExpr, Expression>();
    int gbyIndex = clauses.indexOf(cuttingGbyClause);
    for (int i = gbyIndex + 1; i < clauses.size(); i++) {
        Clause cl = clauses.get(i);
        if (cl.getClauseType() == ClauseType.LET_CLAUSE) {
            LetClause letClause = (LetClause) cl;
            // inline let variables one by one iteratively.
            letClause.setBindingExpr((Expression) AQLVariableSubstitutionUtil.substituteVariable(letClause.getBindingExpr(), varExprMap));
            varExprMap.put(letClause.getVarExpr(), letClause.getBindingExpr());
        }
    }
    return varExprMap;
}

Example 70 with Expression

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

the class ClauseComparator method visit.

@Override
public Void visit(LetClause lc, Integer step) throws CompilationException {
    out.print(skip(step) + "with ");
    lc.getVarExpr().accept(this, step + 2);
    out.print(" as ");
    Expression bindingExpr = lc.getBindingExpr();
    bindingExpr.accept(this, step + 2);
    out.println();
    return null;
}