Examples with ZSelectItem lucee.runtime.sql.old.ZSelectItem used on opensource projects

Example 1 with ZSelectItem

use of lucee.runtime.sql.old.ZSelectItem in project Lucee by lucee.

the class Executer method testExecute.

private Query testExecute(PageContext pc, SQL sql, Query qr, ZQuery query, int maxrows) throws PageException {
    int recCount = qr.getRecordcount();
    Vector vSelects = query.getSelect();
    int selCount = vSelects.size();
    Map<Collection.Key, Object> selects = MapFactory.<Collection.Key, Object>getConcurrentMap();
    boolean isSMS = false;
    // headers
    for (int i = 0; i < selCount; i++) {
        ZSelectItem select = (ZSelectItem) vSelects.get(i);
        if (select.isWildcard() || (isSMS = select.getColumn().equals(SQLPrettyfier.PLACEHOLDER_ASTERIX))) {
            if (!isSMS && !select.getColumn().equals("*"))
                throw new DatabaseException("can't execute this type of query at the moment", null, sql, null);
            // Collection.Key[] keys = qr.keys();
            Iterator<Key> it = qr.keyIterator();
            Key k;
            while (it.hasNext()) {
                k = it.next();
                selects.put(k, k.getString());
            }
            isSMS = false;
        } else {
            // if(SQLPrettyfier.PLACEHOLDER_COUNT.equals(select.getAlias())) select.setAlias("count");
            // if(SQLPrettyfier.PLACEHOLDER_COUNT.equals(select.getColumn())) select.setExpression(new ZConstant("count",ZConstant.COLUMNNAME));
            String alias = select.getAlias();
            String column = select.getColumn();
            if (alias == null)
                alias = column;
            alias = alias.toLowerCase();
            selects.put(KeyImpl.init(alias), select);
        }
    }
    Key[] headers = selects.keySet().toArray(new Collection.Key[selects.size()]);
    // aHeaders.toArray(new String[aHeaders.size()]);
    QueryImpl rtn = new QueryImpl(headers, 0, "query", sql);
    // loop records
    Vector orders = query.getOrderBy();
    ZExp where = query.getWhere();
    // print.out(headers);
    // int newRecCount=0;
    boolean hasMaxrow = maxrows > -1 && (orders == null || orders.size() == 0);
    for (int row = 1; row <= recCount; row++) {
        sql.setPosition(0);
        if (hasMaxrow && maxrows <= rtn.getRecordcount())
            break;
        boolean useRow = where == null || Caster.toBooleanValue(executeExp(pc, sql, qr, where, row));
        if (useRow) {
            rtn.addRow(1);
            for (int cell = 0; cell < headers.length; cell++) {
                Object value = selects.get(headers[cell]);
                rtn.setAt(headers[cell], rtn.getRecordcount(), getValue(pc, sql, qr, row, headers[cell], value));
            }
        }
    }
    // Group By
    if (query.getGroupBy() != null)
        throw new DatabaseException("group by are not supported at the moment", null, sql, null);
    // Order By
    if (orders != null && orders.size() > 0) {
        int len = orders.size();
        for (int i = len - 1; i >= 0; i--) {
            ZOrderBy order = (ZOrderBy) orders.get(i);
            ZConstant name = (ZConstant) order.getExpression();
            rtn.sort(name.getValue().toLowerCase(), order.getAscOrder() ? Query.ORDER_ASC : Query.ORDER_DESC);
        }
        if (maxrows > -1) {
            rtn.cutRowsTo(maxrows);
        }
    }
    // Distinct
    if (query.isDistinct()) {
        String[] keys = rtn.getColumns();
        QueryColumn[] columns = new QueryColumn[keys.length];
        for (int i = 0; i < columns.length; i++) {
            columns[i] = rtn.getColumn(keys[i]);
        }
        int i;
        outer: for (int row = rtn.getRecordcount(); row > 1; row--) {
            for (i = 0; i < columns.length; i++) {
                if (!Operator.equals(QueryUtil.getValue(columns[i], row), QueryUtil.getValue(columns[i], row - 1), true))
                    continue outer;
            }
            rtn.removeRow(row);
        }
    }
    // UNION // TODO support it
    ZExpression set = query.getSet();
    if (set != null) {
        ZExp op = set.getOperand(0);
        if (op instanceof ZQuery)
            throw new DatabaseException("union is not supported at the moment", null, sql, null);
    // getInvokedTables((ZQuery)op, tablesNames);
    }
    return rtn;
}