Package org.h2.result

Examples of org.h2.result.ResultInterface

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        try {
            debugCodeCall("getCatalog");
            checkClosed();
            if (catalog == null) {
                CommandInterface cat = prepareCommand("CALL DATABASE()", Integer.MAX_VALUE);
                ResultInterface result = cat.executeQuery(0, false);
                result.next();
                catalog = result.currentRow()[0].getString();
                cat.close();
            }
            return catalog;
        } catch (Exception e) {
            throw logAndConvert(e);
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        try {
            debugCodeCall("getQueryTimeout");
            checkClosed();
            getQueryTimeout = prepareCommand("SELECT VALUE FROM INFORMATION_SCHEMA.SETTINGS WHERE NAME=?", getQueryTimeout);
            getQueryTimeout.getParameters().get(0).setValue(ValueString.get("QUERY_TIMEOUT"), false);
            ResultInterface result = getQueryTimeout.executeQuery(0, false);
            result.next();
            int queryTimeout = result.currentRow()[0].getInt();
            result.close();
            if (queryTimeout == 0) {
                return 0;
            }
            // round to the next second, otherwise 999 millis would return 0 seconds
            return (queryTimeout + 999) / 1000;
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    public int getTransactionIsolation() throws SQLException {
        try {
            debugCodeCall("getTransactionIsolation");
            checkClosed();
            getLockMode = prepareCommand("CALL LOCK_MODE()", getLockMode);
            ResultInterface result = getLockMode.executeQuery(0, false);
            result.next();
            int lockMode = result.currentRow()[0].getInt();
            result.close();
            int transactionIsolationLevel;
            switch(lockMode) {
            case Constants.LOCK_MODE_OFF:
                transactionIsolationLevel = Connection.TRANSACTION_READ_UNCOMMITTED;
                break;
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    /**
     * INTERNAL
     */
    ResultSet getGeneratedKeys(JdbcStatement stat, int id) {
        getGeneratedKeys = prepareCommand("SELECT SCOPE_IDENTITY() WHERE SCOPE_IDENTITY() IS NOT NULL", getGeneratedKeys);
        ResultInterface result = getGeneratedKeys.executeQuery(0, false);
        ResultSet rs = new JdbcResultSet(this, stat, result, id, false, true, false);
        return rs;
    }
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            buff.append("C.").append(c.getSQL()).append('=').
                append("P.").append(refColumns[i++].getSQL());
        }
        buff.append(')');
        String sql = buff.toString();
        ResultInterface r = session.prepare(sql).query(1);
        if (r.next()) {
            throw DbException.get(ErrorCode.REFERENTIAL_INTEGRITY_VIOLATED_PARENT_MISSING_1,
                    getShortDescription(null, null));
        }
    }
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    }

    private void checkNoNullValues() {
        String sql = "SELECT COUNT(*) FROM " + table.getSQL() + " WHERE " + oldColumn.getSQL() + " IS NULL";
        Prepared command = session.prepare(sql);
        ResultInterface result = command.query(0);
        result.next();
        if (result.currentRow()[0].getInt() > 0) {
            throw DbException.get(ErrorCode.COLUMN_CONTAINS_NULL_VALUES_1, oldColumn.getSQL());
        }
    }
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            right.setDistinct(true);
            break;
        default:
            DbException.throwInternalError("type=" + unionType);
        }
        ResultInterface l = left.query(0);
        ResultInterface r = right.query(0);
        l.reset();
        r.reset();
        switch (unionType) {
        case UNION_ALL:
        case UNION: {
            while (l.next()) {
                result.addRow(convert(l.currentRow(), columnCount));
            }
            while (r.next()) {
                result.addRow(convert(r.currentRow(), columnCount));
            }
            break;
        }
        case EXCEPT: {
            while (l.next()) {
                result.addRow(convert(l.currentRow(), columnCount));
            }
            while (r.next()) {
                result.removeDistinct(convert(r.currentRow(), columnCount));
            }
            break;
        }
        case INTERSECT: {
            LocalResult temp = new LocalResult(session, expressionArray, columnCount);
            temp.setDistinct();
            temp.setRandomAccess();
            while (l.next()) {
                temp.addRow(convert(l.currentRow(), columnCount));
            }
            while (r.next()) {
                Value[] values = convert(r.currentRow(), columnCount);
                if (temp.containsDistinct(values)) {
                    result.addRow(values);
                }
            }
            break;
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        if (sample > 0) {
            buff.append(" LIMIT 1 SAMPLE_SIZE ").append(sample);
        }
        String sql = buff.toString();
        Prepared command = session.prepare(sql);
        ResultInterface result = command.query(0);
        result.next();
        for (int j = 0; j < columns.length; j++) {
            int selectivity = result.currentRow()[j].getInt();
            columns[j].setSelectivity(selectivity);
        }
        if (manual) {
            db.update(session, table);
        } else {
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        } else {
            table.lock(session, true, false);
            if (insertFromSelect) {
                query.query(0, this);
            } else {
                ResultInterface rows = query.query(0);
                while (rows.next()) {
                    Value[] r = rows.currentRow();
                    addRow(r);
                }
                rows.close();
            }
        }
        table.fire(session, Trigger.INSERT, false);
        return rowNumber;
    }
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    public ResultInterface query(int maxrows) {
        recompileIfRequired();
        start();
        prepared.checkParameters();
        ResultInterface result = prepared.query(maxrows);
        prepared.trace(startTime, result.getRowCount());
        return result;
    }
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