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Optimize SQL Statements / result gathering #2007

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Oct 7, 2021
Merged

Optimize SQL Statements / result gathering #2007

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f3e1d94
Optimize gathering of query results
matthiasstraka Oct 6, 2021
b4338de
SQL statement simplifications
matthiasstraka Oct 6, 2021
c997f81
Move collected metadata/resources to CdsObject
matthiasstraka Oct 6, 2021
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12 changes: 12 additions & 0 deletions src/cds_objects.h
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Original file line number Diff line number Diff line change
Expand Up @@ -269,6 +269,12 @@ class CdsObject {
this->metaData = metaData;
}

/// \brief Set entire metadata dictionary by moving
void setMetaData(std::vector<std::pair<std::string, std::string>>&& metaData)
{
this->metaData = std::move(metaData);
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I don't know if it's a good idea to have setters moving stuff.

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Why not? Isn't this a very common pattern and one of the main reasons for move?

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Hmm nvm.

}

/// \brief Add a single metadata value.
void addMetaData(const metadata_fields_t key, const std::string& value)
{
Expand Down Expand Up @@ -330,6 +336,12 @@ class CdsObject {
resources = res;
}

/// \brief Set resources by move
void setResources(std::vector<std::shared_ptr<CdsResource>>&& res)
{
resources = std::move(res);
}

/// \brief Search resources for given handler id
bool hasResource(int id) const
{
Expand Down
29 changes: 17 additions & 12 deletions src/database/sql_database.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -1380,26 +1380,29 @@ std::shared_ptr<CdsObject> SQLDatabase::createObjectFromRow(const std::unique_pt

auto metaData = retrieveMetaDataForObject(obj->getID());
if (!metaData.empty()) {
obj->setMetaData(metaData);
obj->setMetaData(std::move(metaData));
} else if (obj->getRefID() != CDS_ID_ROOT) {
metaData = retrieveMetaDataForObject(obj->getRefID());
if (!metaData.empty())
obj->setMetaData(metaData);
obj->setMetaData(std::move(metaData));
}

std::string auxdataStr = fallbackString(getCol(row, BrowseCol::Auxdata), getCol(row, BrowseCol::RefAuxdata));
std::map<std::string, std::string> aux = dictDecode(auxdataStr);
obj->setAuxData(aux);

bool resourceZeroOk = false;
auto resources = retrieveResourcesForObject(obj->getID());
if (!resources.empty()) {
obj->setResources(resources);
resourceZeroOk = true;
obj->setResources(std::move(resources));
} else if (obj->getRefID() != CDS_ID_ROOT) {
resources = retrieveResourcesForObject(obj->getRefID());
if (!resources.empty())
obj->setResources(resources);
if (!resources.empty()) {
resourceZeroOk = true;
obj->setResources(std::move(resources));
}
}
auto resourceZeroOk = !resources.empty();

obj->setVirtual((obj->getRefID() && obj->isPureItem()) || (obj->isItem() && !obj->isPureItem())); // gets set to true for virtual containers below

Expand Down Expand Up @@ -1475,19 +1478,21 @@ std::shared_ptr<CdsObject> SQLDatabase::createObjectFromSearchRow(const std::uni

auto metaData = retrieveMetaDataForObject(obj->getID());
if (!metaData.empty())
obj->setMetaData(metaData);
obj->setMetaData(std::move(metaData));

bool resourceZeroOk = false;
auto resources = retrieveResourcesForObject(obj->getID());
if (!resources.empty()) {
obj->setResources(resources);
resourceZeroOk = true;
obj->setResources(std::move(resources));
} else if (obj->getRefID() != CDS_ID_ROOT) {
resources = retrieveResourcesForObject(obj->getRefID());
if (!resources.empty())
obj->setResources(resources);
if (!resources.empty()) {
resourceZeroOk = true;
obj->setResources(std::move(resources));
}
}

auto resourceZeroOk = !resources.empty();

if (obj->isItem()) {
if (!resourceZeroOk)
throw_std_runtime_error("tried to create object without at least one resource");
Expand Down