/**
* Perform operator-specific checks of input and return the shape of the output. Currently,
* the output array must exist.
* @param schemas the shapes of the input arrays
* @param query the query context
*/
ArrayDesc inferSchema(std::vector< ArrayDesc> schemas, std::shared_ptr< Query> query)
{
SCIDB_ASSERT(schemas.size() == 1);
SCIDB_ASSERT(_parameters.size() == 1);
string arrayNameOrg =
((std::shared_ptr<OperatorParamReference>&)_parameters[0])->getObjectName();
SCIDB_ASSERT(ArrayDesc::isNameUnversioned(arrayNameOrg));
//Ensure attributes names uniqueness.
std::string arrayName;
std::string namespaceName;
query->getNamespaceArrayNames(arrayNameOrg, namespaceName, arrayName);
ArrayDesc dstDesc;
ArrayDesc const& srcDesc = schemas[0];
ArrayID arrayId = query->getCatalogVersion(namespaceName, arrayName);
bool fArrayDesc = scidb::namespaces::Communicator::getArrayDesc(
namespaceName, arrayName, arrayId, dstDesc, false);
if (!fArrayDesc) {
throw USER_EXCEPTION(SCIDB_SE_INFER_SCHEMA, SCIDB_LE_ARRAY_DOESNT_EXIST) << arrayName;
}
ArrayDesc::checkConformity(srcDesc, dstDesc,
ArrayDesc::IGNORE_PSCHEME |
ArrayDesc::IGNORE_OVERLAP |
ArrayDesc::IGNORE_INTERVAL); // allows auto-repart()
SCIDB_ASSERT(dstDesc.getId() == dstDesc.getUAId());
SCIDB_ASSERT(dstDesc.getName() == arrayName);
SCIDB_ASSERT(dstDesc.getUAId() > 0);
return dstDesc;
}
