Examples with BinaryExpression org.apache.carbondata.core.scan.expression.BinaryExpression used on opensource projects

Example 1 with BinaryExpression

use of org.apache.carbondata.core.scan.expression.BinaryExpression in project carbondata by apache.

the class FilterExpressionProcessor method createPartitionFilterTree.

/**
 * create partition filter by basing on pushed-down filter
 * @param expressionTree
 * @param partitionInfo
 * @return
 */
private PartitionFilterIntf createPartitionFilterTree(Expression expressionTree, PartitionInfo partitionInfo) {
    ExpressionType filterExpressionType = expressionTree.getFilterExpressionType();
    String partitionColumnName = partitionInfo.getColumnSchemaList().get(0).getColumnName();
    BinaryExpression currentExpression = null;
    ColumnExpression left = null;
    switch(filterExpressionType) {
        case OR:
            currentExpression = (BinaryExpression) expressionTree;
            return new OrFilterImpl(createPartitionFilterTree(currentExpression.getLeft(), partitionInfo), createPartitionFilterTree(currentExpression.getRight(), partitionInfo));
        case RANGE:
        case AND:
            currentExpression = (BinaryExpression) expressionTree;
            return new AndFilterImpl(createPartitionFilterTree(currentExpression.getLeft(), partitionInfo), createPartitionFilterTree(currentExpression.getRight(), partitionInfo));
        case EQUALS:
            EqualToExpression equalTo = (EqualToExpression) expressionTree;
            if (equalTo.getLeft() instanceof ColumnExpression && equalTo.getRight() instanceof LiteralExpression) {
                left = (ColumnExpression) equalTo.getLeft();
                if (partitionColumnName.equals(left.getCarbonColumn().getColName())) {
                    return new EqualToFilterImpl(equalTo, partitionInfo);
                }
            }
            return new KeepAllPartitionFilterImpl();
        case IN:
            InExpression in = (InExpression) expressionTree;
            if (in.getLeft() instanceof ColumnExpression && in.getRight() instanceof ListExpression) {
                left = (ColumnExpression) in.getLeft();
                if (partitionColumnName.equals(left.getCarbonColumn().getColName())) {
                    return new InFilterImpl(in, partitionInfo);
                }
            }
            return new KeepAllPartitionFilterImpl();
        case FALSE:
            return new PruneAllPartitionFilterImpl();
        case TRUE:
            return new KeepAllPartitionFilterImpl();
        case GREATERTHAN:
            GreaterThanExpression greaterThan = (GreaterThanExpression) expressionTree;
            if (greaterThan.getLeft() instanceof ColumnExpression && greaterThan.getRight() instanceof LiteralExpression) {
                left = (ColumnExpression) greaterThan.getLeft();
                if (partitionColumnName.equals(left.getCarbonColumn().getColName())) {
                    return new RangeFilterImpl((LiteralExpression) greaterThan.getRight(), true, false, partitionInfo);
                }
            }
            return new KeepAllPartitionFilterImpl();
        case GREATERTHAN_EQUALTO:
            GreaterThanEqualToExpression greaterThanEqualTo = (GreaterThanEqualToExpression) expressionTree;
            if (greaterThanEqualTo.getLeft() instanceof ColumnExpression && greaterThanEqualTo.getRight() instanceof LiteralExpression) {
                left = (ColumnExpression) greaterThanEqualTo.getLeft();
                if (partitionColumnName.equals(left.getCarbonColumn().getColName())) {
                    return new RangeFilterImpl((LiteralExpression) greaterThanEqualTo.getRight(), true, true, partitionInfo);
                }
            }
            return new KeepAllPartitionFilterImpl();
        case LESSTHAN:
            LessThanExpression lessThan = (LessThanExpression) expressionTree;
            if (lessThan.getLeft() instanceof ColumnExpression && lessThan.getRight() instanceof LiteralExpression) {
                left = (ColumnExpression) lessThan.getLeft();
                if (partitionColumnName.equals(left.getCarbonColumn().getColName())) {
                    return new RangeFilterImpl((LiteralExpression) lessThan.getRight(), false, false, partitionInfo);
                }
            }
            return new KeepAllPartitionFilterImpl();
        case LESSTHAN_EQUALTO:
            LessThanEqualToExpression lessThanEqualTo = (LessThanEqualToExpression) expressionTree;
            if (lessThanEqualTo.getLeft() instanceof ColumnExpression && lessThanEqualTo.getRight() instanceof LiteralExpression) {
                left = (ColumnExpression) lessThanEqualTo.getLeft();
                if (partitionColumnName.equals(left.getCarbonColumn().getColName())) {
                    return new RangeFilterImpl((LiteralExpression) lessThanEqualTo.getRight(), false, true, partitionInfo);
                }
            }
            return new KeepAllPartitionFilterImpl();
        case NOT_IN:
        case NOT_EQUALS:
        default:
            return new KeepAllPartitionFilterImpl();
    }
}

Example 2 with BinaryExpression

use of org.apache.carbondata.core.scan.expression.BinaryExpression in project carbondata by apache.

the class FilterExpressionProcessor method createFilterResolverTree.

/**
 * Pattern used : Visitor Pattern
 * Method will create filter resolver tree based on the filter expression tree,
 * in this algorithm based on the expression instance the resolvers will created
 *
 * @param expressionTree
 * @param tableIdentifier
 * @return
 */
private FilterResolverIntf createFilterResolverTree(Expression expressionTree, AbsoluteTableIdentifier tableIdentifier) {
    ExpressionType filterExpressionType = expressionTree.getFilterExpressionType();
    BinaryExpression currentExpression = null;
    switch(filterExpressionType) {
        case OR:
        case AND:
            currentExpression = (BinaryExpression) expressionTree;
            return new LogicalFilterResolverImpl(createFilterResolverTree(currentExpression.getLeft(), tableIdentifier), createFilterResolverTree(currentExpression.getRight(), tableIdentifier), currentExpression);
        case RANGE:
            return getFilterResolverBasedOnExpressionType(ExpressionType.RANGE, true, expressionTree, tableIdentifier, expressionTree);
        case EQUALS:
        case IN:
            return getFilterResolverBasedOnExpressionType(ExpressionType.EQUALS, ((BinaryConditionalExpression) expressionTree).isNull, expressionTree, tableIdentifier, expressionTree);
        case GREATERTHAN:
        case GREATERTHAN_EQUALTO:
        case LESSTHAN:
        case LESSTHAN_EQUALTO:
            return getFilterResolverBasedOnExpressionType(ExpressionType.EQUALS, true, expressionTree, tableIdentifier, expressionTree);
        case STARTSWITH:
            assert (expressionTree instanceof StartsWithExpression);
            currentExpression = (StartsWithExpression) expressionTree;
            Expression re = currentExpression.getRight();
            assert (re instanceof LiteralExpression);
            LiteralExpression literal = (LiteralExpression) re;
            String value = literal.getLiteralExpValue().toString();
            Expression left = new GreaterThanEqualToExpression(currentExpression.getLeft(), literal);
            String maxValueLimit = value.substring(0, value.length() - 1) + (char) (((int) value.charAt(value.length() - 1)) + 1);
            Expression right = new LessThanExpression(currentExpression.getLeft(), new LiteralExpression(maxValueLimit, literal.getLiteralExpDataType()));
            currentExpression = new AndExpression(left, right);
            return new LogicalFilterResolverImpl(createFilterResolverTree(currentExpression.getLeft(), tableIdentifier), createFilterResolverTree(currentExpression.getRight(), tableIdentifier), currentExpression);
        case NOT_EQUALS:
        case NOT_IN:
            return getFilterResolverBasedOnExpressionType(ExpressionType.NOT_EQUALS, false, expressionTree, tableIdentifier, expressionTree);
        case FALSE:
            return getFilterResolverBasedOnExpressionType(ExpressionType.FALSE, false, expressionTree, tableIdentifier, expressionTree);
        case TRUE:
            return getFilterResolverBasedOnExpressionType(ExpressionType.TRUE, false, expressionTree, tableIdentifier, expressionTree);
        default:
            return getFilterResolverBasedOnExpressionType(ExpressionType.UNKNOWN, false, expressionTree, tableIdentifier, expressionTree);
    }
}