ForEachChild(i, record) { IHqlExpression * cur = record->queryChild(i); switch (cur->getOperator()) { case no_record: //MORE: If this is a public symbol it should be expanded, otherwise it will be elsewhere. expandRecordSymbolsMeta(metaTree, cur); break; case no_field: { IPropertyTree * field = metaTree->addPropTree("Field"); field->setProp("@name", str(cur->queryId())); StringBuffer ecltype; cur->queryType()->getECLType(ecltype); field->setProp("@type", ecltype); break; } case no_ifblock: { IPropertyTree * block = metaTree->addPropTree("IfBlock"); expandRecordSymbolsMeta(block, cur->queryChild(1)); break; } case no_attr: case no_attr_link: case no_attr_expr: { IPropertyTree * attr = metaTree->addPropTree("Attr"); attr->setProp("@name", str(cur->queryName())); break; } } }
IHqlExpression* HqlGram::processAbstractDataset(IHqlExpression* _expr, IHqlExpression* formal, IHqlExpression* actual, IHqlExpression * mapping, const attribute& errpos, bool errorIfNotFound, bool & hadError) { LinkedHqlExpr transformed = _expr; IHqlExpression* formalRecord = formal->queryRecord(); IHqlExpression* actualRecord = actual->queryRecord(); assertex(formalRecord && actualRecord); hadError = false; IHqlSimpleScope *actualScope = actualRecord->querySimpleScope(); unsigned numChildren = formalRecord->numChildren(); for (unsigned idx = 0; idx < numChildren; idx++) { IHqlExpression* kid = formalRecord->queryChild(idx); if ((kid->getOperator() == no_ifblock) || kid->isAttribute()) continue; IIdAtom * name = kid->queryId(); IIdAtom * mapto = fieldMapTo(mapping, name); OwnedHqlExpr match = actualScope->lookupSymbol(mapto); if (match) { if (!kid->queryType()->assignableFrom(match->queryType())) { StringBuffer fromType, toType; getFriendlyTypeStr(kid,fromType); getFriendlyTypeStr(match,toType); reportError(ERR_DSPARAM_TYPEMISMATCH, errpos, "Can not mapping type %s(field '%s') to %s(field '%s')", fromType.str(), str(kid->queryName()), toType.str(), str(match->queryName())); hadError = true; } //MORE: This should really be mapped in a single go if (transformed) transformed.setown(bindField(transformed, kid, match)); } else if (errorIfNotFound) { reportError(ERR_DSPARM_MISSINGFIELD,errpos,"Dataset %s has no field named '%s'", str(actual->queryName()), str(mapto)); hadError = true; } } return transformed.getClear(); }
IHqlExpression * PositionTransformer::createTransformed(IHqlExpression * _expr) { OwnedHqlExpr transformed = NewHqlTransformer::createTransformed(_expr); switch (transformed->getOperator()) { case no_table: { IHqlExpression * mode = transformed->queryChild(2); HqlExprArray fields; HqlExprArray args; if (mode->getOperator() == no_thor) { unwindChildren(fields, transformed->queryChild(1)); IHqlExpression * filePosAttr = createComma(createAttribute(virtualAtom, createAttribute(filepositionAtom)), insertedAttr.getLink()); IHqlExpression * sizeofAttr = createComma(createAttribute(virtualAtom, createAttribute(sizeofAtom)), insertedAttr.getLink()); fields.append(*createField(fileposId, makeIntType(8, false), NULL, filePosAttr)); fields.append(*createField(recordlenName, makeIntType(2, false), NULL, sizeofAttr)); unwindChildren(args, transformed); args.replace(*createRecord(fields), 1); return transformed->clone(args); } } break; case no_iterate: case no_hqlproject: { HqlExprArray args; HqlExprArray assigns; IHqlExpression * transform = transformed->queryChild(1); unwindChildren(args, transformed); unwindChildren(assigns, transform); IHqlExpression * inRecord = transformed->queryChild(0)->queryRecord(); IHqlExpression * outRecord = transform->queryRecord(); HqlExprArray fields; unwindChildren(fields, outRecord); ForEachChild(idx, inRecord) { IHqlExpression * child = inRecord->queryChild(idx); if (child->hasAttribute(insertedAtom)) { IHqlExpression * newTarget = createField(child->queryId(), child->getType(), LINK(child), insertedAttr.getLink()); fields.append(*newTarget); assigns.append(*createValue(no_assign, makeVoidType(), newTarget, createSelectExpr(createValue(no_left), LINK(newTarget)))); } } IHqlExpression * newRecord = createRecord(fields); args.replace(*createValue(no_transform, newRecord->getType(), assigns), 1); return transformed->clone(args); } break; case no_join: //only ok if join first case no_rollup: case no_newaggregate: case no_aggregate: fail(); break; case no_usertable: case no_selectfields: { IHqlExpression * grouping = transformed->queryChild(2); if (grouping && (grouping->getOperator() != no_attr)) fail(); IHqlExpression * record = transformed->queryRecord(); HqlExprArray fields; unwindChildren(fields, transformed->queryChild(1)); ForEachChild(idx, record) { IHqlExpression * child = record->queryChild(idx); if (child->hasAttribute(insertedAtom)) fields.append(*createField(child->queryId(), child->getType(), LINK(child), insertedAttr.getLink())); } HqlExprArray args; unwindChildren(args, transformed); args.replace(*createRecord(fields), 1); return transformed->clone(args); }