Ejemplo n.º 1
0
DataSourceMetaData::DataSourceMetaData(IHqlExpression * _record, byte _numFieldsToIgnore, bool _randomIsOk, bool _isGrouped, unsigned _keyedSize)
{
    init();
    numFieldsToIgnore = _numFieldsToIgnore;
    randomIsOk = _randomIsOk;
    isStoredFixedWidth = true;
    //MORE: Blobs aren't handled correctly in indexes....
    maxRecordSize = ::getMaxRecordSize(_record, MAX_RECORD_SIZE);
    keyedSize = _keyedSize;

    gatherFields(_record, false);
    if (_isGrouped)
    {
        Owned<ITypeInfo> type = makeBoolType();
        addSimpleField("__groupfollows__", NULL, type);
        maxRecordSize++;
    }

    if (isStoredFixedWidth)
        assertex(storedFixedSize == maxRecordSize);
}
Ejemplo n.º 2
0
//MORE: Really this should create no_selects for the sub records, but pass on that for the moment.
void DataSourceMetaData::gatherFields(IHqlExpression * expr, bool isConditional)
{
    switch (expr->getOperator())
    {
    case no_record:
        gatherChildFields(expr, isConditional);
        break;
    case no_ifblock:
        {
            OwnedITypeInfo boolType = makeBoolType();
            OwnedITypeInfo voidType = makeVoidType();
            isStoredFixedWidth = false;
            fields.append(*new DataSourceMetaItem(FVFFbeginif, NULL, NULL, boolType));
            gatherChildFields(expr->queryChild(1), true);
            fields.append(*new DataSourceMetaItem(FVFFendif, NULL, NULL, voidType));
            break;
        }
    case no_field:
        {
            if (expr->hasProperty(__ifblockAtom))
                break;
            Linked<ITypeInfo> type = expr->queryType();
            IAtom * name = expr->queryName();
            IHqlExpression * nameAttr = expr->queryProperty(namedAtom);
            StringBuffer outname;
            if (nameAttr && nameAttr->queryChild(0)->queryValue())
                nameAttr->queryChild(0)->queryValue()->getStringValue(outname);
            else
                outname.append(name).toLowerCase();

            StringBuffer xpathtext;
            const char * xpath = NULL;
            IHqlExpression * xpathAttr = expr->queryProperty(xpathAtom);
            if (xpathAttr && xpathAttr->queryChild(0)->queryValue())
                xpath = xpathAttr->queryChild(0)->queryValue()->getStringValue(xpathtext);

            if (isKey() && expr->hasProperty(blobAtom))
                type.setown(makeIntType(8, false));
            type_t tc = type->getTypeCode();
            if (tc == type_row)
            {
                OwnedITypeInfo voidType = makeVoidType();
                fields.append(*new DataSourceMetaItem(FVFFbeginrecord, outname, xpath, voidType));
                gatherChildFields(expr->queryRecord(), isConditional);
                fields.append(*new DataSourceMetaItem(FVFFendrecord, outname, xpath, voidType));
            }
            else if ((tc == type_table) || (tc == type_groupedtable))
            {
                isStoredFixedWidth = false;
                fields.append(*new DataSourceDatasetItem(outname, xpath, expr));
            }
            else if (tc == type_set)
            {
                isStoredFixedWidth = false;
                fields.append(*new DataSourceSetItem(outname, xpath, type));
            }
            else
            {
                if (type->getTypeCode() == type_alien)
                {
                    IHqlAlienTypeInfo * alien = queryAlienType(type);
                    type.set(alien->queryPhysicalType());
                }
                addSimpleField(outname, xpath, type);
            }
            break;
        }
    }
}
Ejemplo n.º 3
0
//MORE: Really this should create no_selects for the sub records, but pass on that for the moment.
void DataSourceMetaData::gatherFields(IHqlExpression * expr, bool isConditional, bool *pMixedContent)
{
    switch (expr->getOperator())
    {
    case no_record:
        gatherChildFields(expr, isConditional, pMixedContent);
        break;
    case no_ifblock:
        {
            OwnedITypeInfo boolType = makeBoolType();
            OwnedITypeInfo voidType = makeVoidType();
            isStoredFixedWidth = false;
            fields.append(*new DataSourceMetaItem(FVFFbeginif, NULL, NULL, boolType));
            gatherChildFields(expr->queryChild(1), true, pMixedContent);
            fields.append(*new DataSourceMetaItem(FVFFendif, NULL, NULL, voidType));
            break;
        }
    case no_field:
        {
            if (expr->hasAttribute(__ifblockAtom))
                break;
            Linked<ITypeInfo> type = expr->queryType();
            IAtom * name = expr->queryName();
            IHqlExpression * nameAttr = expr->queryAttribute(namedAtom);
            StringBuffer outname;
            if (nameAttr && nameAttr->queryChild(0)->queryValue())
                nameAttr->queryChild(0)->queryValue()->getStringValue(outname);
            else
                outname.append(name).toLowerCase();

            StringBuffer xpathtext;
            const char * xpath = NULL;
            IHqlExpression * xpathAttr = expr->queryAttribute(xpathAtom);
            if (xpathAttr && xpathAttr->queryChild(0)->queryValue())
                xpath = xpathAttr->queryChild(0)->queryValue()->getStringValue(xpathtext);
            unsigned flag = FVFFnone;
            if (isKey() && expr->hasAttribute(blobAtom))
            {
                type.setown(makeIntType(8, false));
                flag = FVFFblob;
            }
            type_t tc = type->getTypeCode();
            if (tc == type_row)
            {
                OwnedITypeInfo voidType = makeVoidType();
                Owned<DataSourceMetaItem> begin = new DataSourceMetaItem(FVFFbeginrecord, outname, xpath, voidType);
                //inherit mixed content from child row with xpath('')
                bool *pItemMixedContent = (pMixedContent && xpath && !*xpath) ? pMixedContent : &(begin->hasMixedContent);
                fields.append(*begin.getClear());
                gatherChildFields(expr->queryRecord(), isConditional, pItemMixedContent);
                fields.append(*new DataSourceMetaItem(FVFFendrecord, outname, xpath, voidType));
            }
            else if ((tc == type_dictionary) || (tc == type_table) || (tc == type_groupedtable))
            {
                isStoredFixedWidth = false;
                Owned<DataSourceDatasetItem> ds = new DataSourceDatasetItem(outname, xpath, expr);
                if (pMixedContent && xpath && !*xpath)
                    *pMixedContent = ds->queryChildMeta()->hasMixedContent;
                fields.append(*ds.getClear());
            }
            else if (tc == type_set)
            {
                isStoredFixedWidth = false;
                if (pMixedContent && xpath && !*xpath)
                    *pMixedContent = true;
                fields.append(*new DataSourceSetItem(outname, xpath, type));
            }
            else
            {
                if (type->getTypeCode() == type_alien)
                {
                    IHqlAlienTypeInfo * alien = queryAlienType(type);
                    type.set(alien->queryPhysicalType());
                }
                if (pMixedContent && xpath && !*xpath)
                    *pMixedContent = true;
                addSimpleField(outname, xpath, type, flag);
            }
            break;
        }
    }
}