PlanNodeFragment *
PlanNodeFragment::fromJSONObject(PlannerDomValue obj)
{
// read and construct plannodes from json object
auto_ptr<PlanNodeFragment> pnf;
if (obj.hasNonNullKey("PLAN_NODES_LISTS")) {
PlannerDomValue planNodesListArray = obj.valueForKey("PLAN_NODES_LISTS");
if (!obj.hasNonNullKey("EXECUTE_LISTS")) {
throwFatalException("Failed to construct plan fragment. Missing EXECUTE_LISTS key");
}
PlannerDomValue executeListArray = obj.valueForKey("EXECUTE_LISTS");
if (planNodesListArray.arrayLen() != executeListArray.arrayLen()) {
throwFatalException("Failed to construct plan fragment. EXECUTE_LISTS and PLAN_NODES_LISTS do not match");
}
int stmtCnt = planNodesListArray.arrayLen();
pnf.reset(new PlanNodeFragment());
for (int i = 0; i < stmtCnt; i++) {
int stmtId = planNodesListArray.valueAtIndex(i).valueForKey("STATEMENT_ID").asInt();
PlannerDomValue planNodesList = planNodesListArray.valueAtIndex(i).valueForKey("PLAN_NODES");
PlannerDomValue executeList = executeListArray.valueAtIndex(i).valueForKey("EXECUTE_LIST");
PlanNodeFragment::nodeListFromJSONObject(pnf.get(), planNodesList, executeList, stmtId);
}
} else {
pnf.reset(new PlanNodeFragment());
PlanNodeFragment::nodeListFromJSONObject(pnf.get(), obj.valueForKey("PLAN_NODES"), obj.valueForKey("EXECUTE_LIST"), 0);
}
PlanNodeFragment::loadParamsFromJSONObject(pnf.get(), obj);
PlanNodeFragment *retval = pnf.get();
pnf.release();
assert(retval);
return retval;
}
/** Parse JSON parameters to create a subquery expression */
static AbstractExpression*
subqueryFactory(ExpressionType subqueryType, PlannerDomValue obj, const std::vector<AbstractExpression*>* args) {
int subqueryId = obj.valueForKey("SUBQUERY_ID").asInt();
std::vector<int> paramIdxs;
if (obj.hasNonNullKey("PARAM_IDX")) {
PlannerDomValue params = obj.valueForKey("PARAM_IDX");
int paramSize = params.arrayLen();
paramIdxs.reserve(paramSize);
if (args == NULL || args->size() != paramSize) {
throw SerializableEEException(VOLT_EE_EXCEPTION_TYPE_EEEXCEPTION,
"subqueryFactory: parameter indexes/tve count mismatch");
}
for (int i = 0; i < paramSize; ++i) {
int paramIdx = params.valueAtIndex(i).asInt();
paramIdxs.push_back(paramIdx);
}
}
std::vector<int> otherParamIdxs;
if (obj.hasNonNullKey("OTHER_PARAM_IDX")) {
PlannerDomValue otherParams = obj.valueForKey("OTHER_PARAM_IDX");
int otherParamSize = otherParams.arrayLen();
otherParamIdxs.reserve(otherParamSize);
otherParamIdxs.reserve(otherParamSize);
for (int i = 0; i < otherParamSize; ++i) {
int paramIdx = otherParams.valueAtIndex(i).asInt();
otherParamIdxs.push_back(paramIdx);
}
}
return new SubqueryExpression(subqueryType, subqueryId, paramIdxs, otherParamIdxs, args);
}
void
PlanNodeFragment::nodeListFromJSONObject(PlanNodeFragment *pnf, PlannerDomValue planNodesList, PlannerDomValue executeList, int stmtId)
{
assert(pnf->m_stmtExecutionListMap.find(stmtId) == pnf->m_stmtExecutionListMap.end());
// NODE_LIST
std::vector<AbstractPlanNode*> planNodes;
for (int i = 0; i < planNodesList.arrayLen(); i++) {
AbstractPlanNode *node = AbstractPlanNode::fromJSONObject(planNodesList.valueAtIndex(i));
assert(node);
assert(pnf->m_idToNodeMap.find(node->getPlanNodeId()) == pnf->m_idToNodeMap.end());
pnf->m_idToNodeMap[node->getPlanNodeId()] = node;
planNodes.push_back(node);
}
// walk the plannodes and complete each plannode's id-to-node maps
for (std::vector< AbstractPlanNode* >::const_iterator node = planNodes.begin();
node != planNodes.end(); ++node) {
const std::vector<CatalogId>& childIds = (*node)->getChildIds();
for (int zz = 0; zz < childIds.size(); zz++) {
(*node)->addChild(pnf->m_idToNodeMap[childIds[zz]]);
}
}
// EXECUTE_LIST
std::auto_ptr<std::vector<AbstractPlanNode*> > executeNodeList(new std::vector<AbstractPlanNode*>());
for (int i = 0; i < executeList.arrayLen(); i++) {
executeNodeList->push_back(pnf->m_idToNodeMap[executeList.valueAtIndex(i).asInt()]);
}
pnf->m_stmtExecutionListMap.insert(std::make_pair(stmtId, executeNodeList.get()));
executeNodeList.release();
}
// ----------------------------------------------------
// Serialization Functions
// ----------------------------------------------------
AbstractPlanNode* AbstractPlanNode::fromJSONObject(PlannerDomValue obj)
{
string typeString = obj.valueForKey("PLAN_NODE_TYPE").asStr();
std::unique_ptr<AbstractPlanNode> node(
plannodeutil::getEmptyPlanNode(stringToPlanNode(typeString)));
node->m_planNodeId = obj.valueForKey("ID").asInt();
if (obj.hasKey("INLINE_NODES")) {
PlannerDomValue inlineNodesValue = obj.valueForKey("INLINE_NODES");
for (int i = 0; i < inlineNodesValue.arrayLen(); i++) {
PlannerDomValue inlineNodeObj = inlineNodesValue.valueAtIndex(i);
AbstractPlanNode *newNode = AbstractPlanNode::fromJSONObject(inlineNodeObj);
// todo: if this throws, new Node can be leaked.
// As long as newNode is not NULL, this will not throw.
assert(newNode);
node->addInlinePlanNode(newNode);
}
}
loadIntArrayFromJSONObject("CHILDREN_IDS", obj, node->m_childIds);
// Output schema are optional -- when they can be determined by a child's copy.
if (obj.hasKey("OUTPUT_SCHEMA")) {
PlannerDomValue outputSchemaArray = obj.valueForKey("OUTPUT_SCHEMA");
for (int i = 0; i < outputSchemaArray.arrayLen(); i++) {
PlannerDomValue outputColumnValue = outputSchemaArray.valueAtIndex(i);
SchemaColumn* outputColumn = new SchemaColumn(outputColumnValue, i);
node->m_outputSchema.push_back(outputColumn);
}
node->m_validOutputColumnCount = static_cast<int>(node->m_outputSchema.size());
}
// Anticipate and mark the two different scenarios of missing output schema.
// The actual output schema can be searched for on demand once the whole plan tree is loaded.
// If there's an inline projection node,
// one of its chief purposes is defining the parent's output schema.
else if (node->getInlinePlanNode(PLAN_NODE_TYPE_PROJECTION)) {
node->m_validOutputColumnCount = SCHEMA_UNDEFINED_SO_GET_FROM_INLINE_PROJECTION;
}
// Otherwise, the node is relying on a child's output schema, possibly several levels down,
// OR it is just an inline node (e.g. a LIMIT) or a DML node,
// whose output schema is known from its context or is otherwise not of any interest.
else {
node->m_validOutputColumnCount = SCHEMA_UNDEFINED_SO_GET_FROM_CHILD;
}
node->loadFromJSONObject(obj);
AbstractPlanNode* retval = node.get();
node.release();
assert(retval);
return retval;
}
void
AggregatePlanNode::loadFromJSONObject(PlannerDomValue obj)
{
PlannerDomValue aggregateColumnsArray = obj.valueForKey("AGGREGATE_COLUMNS");
for (int i = 0; i < aggregateColumnsArray.arrayLen(); i++) {
PlannerDomValue aggregateColumnValue = aggregateColumnsArray.valueAtIndex(i);
bool containsType = false;
bool containsDistinct = false;
bool containsOutputColumn = false;
bool containsExpression = false;
if (aggregateColumnValue.hasNonNullKey("AGGREGATE_TYPE")) {
containsType = true;
string aggregateColumnTypeString = aggregateColumnValue.valueForKey("AGGREGATE_TYPE").asStr();
m_aggregates.push_back(stringToExpression(aggregateColumnTypeString));
}
if (aggregateColumnValue.hasNonNullKey("AGGREGATE_DISTINCT")) {
containsDistinct = true;
bool distinct = aggregateColumnValue.valueForKey("AGGREGATE_DISTINCT").asInt() == 1;
m_distinctAggregates.push_back(distinct);
}
if (aggregateColumnValue.hasNonNullKey("AGGREGATE_OUTPUT_COLUMN")) {
containsOutputColumn = true;
int column = aggregateColumnValue.valueForKey("AGGREGATE_OUTPUT_COLUMN").asInt();
m_aggregateOutputColumns.push_back(column);
}
if (aggregateColumnValue.hasNonNullKey("AGGREGATE_EXPRESSION")) {
containsExpression = true;
PlannerDomValue exprDom = aggregateColumnValue.valueForKey("AGGREGATE_EXPRESSION");
m_aggregateInputExpressions.push_back(AbstractExpression::buildExpressionTree(exprDom));
}
if(!(containsType && containsDistinct && containsOutputColumn)) {
throw SerializableEEException(VOLT_EE_EXCEPTION_TYPE_EEEXCEPTION,
"AggregatePlanNode::loadFromJSONObject:"
" Missing type, distinct, or outputcolumn.");
}
if ( ! containsExpression) {
m_aggregateInputExpressions.push_back(NULL);
}
}
if (obj.hasNonNullKey("GROUPBY_EXPRESSIONS")) {
PlannerDomValue groupByExpressionsArray = obj.valueForKey("GROUPBY_EXPRESSIONS");
for (int i = 0; i < groupByExpressionsArray.arrayLen(); i++) {
m_groupByExpressions.push_back(AbstractExpression::buildExpressionTree(groupByExpressionsArray.valueAtIndex(i)));
}
}
if (obj.hasNonNullKey("PRE_PREDICATE")) {
m_prePredicate = AbstractExpression::buildExpressionTree(obj.valueForKey("PRE_PREDICATE"));
}
if (obj.hasNonNullKey("POST_PREDICATE")) {
m_postPredicate = AbstractExpression::buildExpressionTree(obj.valueForKey("POST_PREDICATE"));
}
}
void
PlanNodeFragment::loadParamsFromJSONObject(PlanNodeFragment *pnf, PlannerDomValue obj)
{
if (obj.hasKey("PARAMETERS")) {
PlannerDomValue parametersArray = obj.valueForKey("PARAMETERS");
for (int i = 0; i < parametersArray.arrayLen(); i++) {
PlannerDomValue parameterArray = parametersArray.valueAtIndex(i);
int index = parameterArray.valueAtIndex(0).asInt();
std::string typeString = parameterArray.valueAtIndex(1).asStr();
pnf->m_parameters.push_back(std::pair< int, voltdb::ValueType>(index, stringToValue(typeString)));
}
}
}
void PartitionByPlanNode::loadFromJSONObject(PlannerDomValue obj)
{
// Start with the base class.
AggregatePlanNode::loadFromJSONObject(obj);
// Read the sort expressions and directions.
PlannerDomValue sortByColumnArray = obj.valueForKey("SORT_COLUMNS");
for (int idx = 0; idx < sortByColumnArray.arrayLen(); idx += 1) {
PlannerDomValue sortColumnValue = sortByColumnArray.valueAtIndex(idx);
if (sortColumnValue.hasNonNullKey("SORT_EXPRESSION")) {
PlannerDomValue exprDom = sortColumnValue.valueForKey("SORT_EXPRESSION");
m_sortExpressions.push_back(AbstractExpression::buildExpressionTree(exprDom));
} else {
throw SerializableEEException(VOLT_EE_EXCEPTION_TYPE_EEEXCEPTION,
"PartitionByPlanNode::loadFromJSONObject:"
" Missing sort expression.");
}
if (sortColumnValue.hasNonNullKey("SORT_DIRECTION")) {
std::string dirStr = sortColumnValue.valueForKey("SORT_DIRECTION").asStr();
m_sortDirections.push_back(stringToSortDirection(dirStr));
} else {
throw SerializableEEException(VOLT_EE_EXCEPTION_TYPE_EEEXCEPTION,
"PartitionByPlanNode::loadFromJSONObject:"
" Missing sort direction.");
}
}
}
PlanNodeFragment *
PlanNodeFragment::fromJSONObject(PlannerDomValue obj)
{
auto_ptr<PlanNodeFragment> pnf(new PlanNodeFragment());
// read and construct plannodes from json object
PlannerDomValue planNodesArray = obj.valueForKey("PLAN_NODES");
for (int i = 0; i < planNodesArray.arrayLen(); i++) {
AbstractPlanNode *node = NULL;
node = AbstractPlanNode::fromJSONObject(planNodesArray.valueAtIndex(i));
assert(node);
pnf->m_planNodes.push_back(node);
pnf->m_idToNodeMap[node->getPlanNodeId()] = node;
}
// walk the plannodes and complete each plannode's id-to-node maps
for (std::vector< AbstractPlanNode* >::const_iterator node = pnf->m_planNodes.begin();
node != pnf->m_planNodes.end(); ++node) {
const std::vector<CatalogId> childIds = (*node)->getChildIds();
for (int zz = 0; zz < childIds.size(); zz++) {
(*node)->addChild(pnf->m_idToNodeMap[childIds[zz]]);
}
}
pnf->loadFromJSONObject(obj);
PlanNodeFragment *retval = pnf.get();
pnf.release();
assert(retval);
return retval;
}
void AbstractPlanNode::loadSortListFromJSONObject(PlannerDomValue obj,
std::vector<AbstractExpression*> *sortExprs,
std::vector<SortDirectionType> *sortDirs) {
PlannerDomValue sortColumnsArray = obj.valueForKey("SORT_COLUMNS");
for (int i = 0; i < sortColumnsArray.arrayLen(); i++) {
PlannerDomValue sortColumn = sortColumnsArray.valueAtIndex(i);
bool hasDirection = (sortDirs == NULL), hasExpression = (sortExprs == NULL);
if (sortDirs && sortColumn.hasNonNullKey("SORT_DIRECTION")) {
hasDirection = true;
std::string sortDirectionStr = sortColumn.valueForKey("SORT_DIRECTION").asStr();
sortDirs->push_back(stringToSortDirection(sortDirectionStr));
}
if (sortExprs && sortColumn.hasNonNullKey("SORT_EXPRESSION")) {
hasExpression = true;
PlannerDomValue exprDom = sortColumn.valueForKey("SORT_EXPRESSION");
sortExprs->push_back(AbstractExpression::buildExpressionTree(exprDom));
}
if (!(hasExpression && hasDirection)) {
throw SerializableEEException(VOLT_EE_EXCEPTION_TYPE_EEEXCEPTION,
"OrderByPlanNode::loadFromJSONObject:"
" Does not have expression and direction.");
}
}
}
/**
* Parse and save predicates.
*/
void ElasticContext::updatePredicates(const std::vector<std::string> &predicateStrings) {
//If there is already a predicate and thus presumably an index, make sure the request is a subset of what exists
//That should always be the case, but wrong answers will follow if we are wrong
if (m_predicates.size() > 0 && dynamic_cast<HashRangeExpression*>(&m_predicates[0]) != NULL && predicateStrings.size() > 0) {
PlannerDomRoot domRoot(predicateStrings[0].c_str());
if (!domRoot.isNull()) {
PlannerDomValue predicateObject = domRoot.rootObject();
HashRangeExpression *expression = dynamic_cast<HashRangeExpression*>(&m_predicates[0]);
if (predicateObject.hasKey("predicateExpression")) {
PlannerDomValue predicateExpression = predicateObject.valueForKey("predicateExpression");
PlannerDomValue rangesArray = predicateExpression.valueForKey("RANGES");
for (int ii = 0; ii < rangesArray.arrayLen(); ii++) {
PlannerDomValue arrayObject = rangesArray.valueAtIndex(ii);
PlannerDomValue rangeStartValue = arrayObject.valueForKey("RANGE_START");
PlannerDomValue rangeEndValue = arrayObject.valueForKey("RANGE_END");
if (!expression->binarySearch(rangeStartValue.asInt()).isTrue()) {
throwFatalException("ElasticContext activate failed because a context already existed with conflicting ranges, conflicting range start is %d", rangeStartValue.asInt());
}
if (!expression->binarySearch(rangeEndValue.asInt()).isTrue()) {
throwFatalException("ElasticContext activate failed because a context already existed with conflicting ranges, conflicting range end is %d", rangeStartValue.asInt());
}
}
}
}
}
m_predicateStrings = predicateStrings; // retain for possible clone after TRUNCATE TABLE
TableStreamerContext::updatePredicates(predicateStrings);
}
void
PlanNodeFragment::loadFromJSONObject(PlannerDomValue obj)
{
PlannerDomValue executeListArray = obj.valueForKey("EXECUTE_LIST");
for (int i = 0; i < executeListArray.arrayLen(); i++) {
m_executionList.push_back(m_idToNodeMap[executeListArray.valueAtIndex(i).asInt()]);
}
if (obj.hasKey("PARAMETERS")) {
PlannerDomValue parametersArray = obj.valueForKey("PARAMETERS");
for (int i = 0; i < parametersArray.arrayLen(); i++) {
PlannerDomValue parameterArray = parametersArray.valueAtIndex(i);
int index = parameterArray.valueAtIndex(0).asInt();
std::string typeString = parameterArray.valueAtIndex(1).asStr();
parameters.push_back(std::pair< int, voltdb::ValueType>(index, stringToValue(typeString)));
}
}
}
void ExpressionUtil::loadIndexedExprsFromJson(std::vector<AbstractExpression*>& indexed_exprs, const std::string& jsonarraystring)
{
PlannerDomRoot domRoot(jsonarraystring.c_str());
PlannerDomValue expressionsArray = domRoot.rootObject();
for (int i = 0; i < expressionsArray.arrayLen(); i++) {
PlannerDomValue exprValue = expressionsArray.valueAtIndex(i);
AbstractExpression *expr = AbstractExpression::buildExpressionTree(exprValue);
indexed_exprs.push_back(expr);
}
}
void AbstractPlanNode::loadIntArrayFromJSONObject(const char* label,
PlannerDomValue obj, std::vector<int>& result)
{
if (obj.hasNonNullKey(label)) {
PlannerDomValue intArray = obj.valueForKey(label);
for (int i = 0; i < intArray.arrayLen(); i++) {
result.push_back(intArray.valueAtIndex(i).asInt());
}
}
}
// Load boolean array from JSON object.
// In IndexScanPlanNode (indexscannode.h and indexscannode.cpp),
// we added a boolean vector "m_compare_not_distinct"
// to indicate whether null values should be skipped for each search key column.
// This function is used to deseralize that boolean vector. (ENG-11096)
void AbstractPlanNode::loadBooleanArrayFromJSONObject(const char* label,
PlannerDomValue obj,
std::vector<bool>& result)
{
if (obj.hasNonNullKey(label)) {
PlannerDomValue stringArray = obj.valueForKey(label);
int len = stringArray.arrayLen();
for (int i = 0; i < len; ++i) {
result.push_back(stringArray.valueAtIndex(i).asBool());
}
}
}
void AbstractPlanNode::OwningExpressionVector::loadExpressionArrayFromJSONObject(const char* label,
PlannerDomValue obj)
{
clear();
if ( ! obj.hasNonNullKey(label)) {
return;
}
PlannerDomValue arrayObj = obj.valueForKey(label);
for (int i = 0; i < arrayObj.arrayLen(); i++) {
AbstractExpression *expr = AbstractExpression::buildExpressionTree(arrayObj.valueAtIndex(i));
push_back(expr);
}
}
/** Parse JSON parameters to create a hash range expression */
static AbstractExpression*
hashRangeFactory(PlannerDomValue obj) {
PlannerDomValue hashColumnValue = obj.valueForKey("HASH_COLUMN");
PlannerDomValue rangesArray = obj.valueForKey("RANGES");
srange_type *ranges = new srange_type[rangesArray.arrayLen()];
for (int ii = 0; ii < rangesArray.arrayLen(); ii++) {
PlannerDomValue arrayObject = rangesArray.valueAtIndex(ii);
PlannerDomValue rangeStartValue = arrayObject.valueForKey("RANGE_START");
PlannerDomValue rangeEndValue = arrayObject.valueForKey("RANGE_END");
ranges[ii] = srange_type(rangeStartValue.asInt(), rangeEndValue.asInt());
}
return new HashRangeExpression(hashColumnValue.asInt(), ranges, static_cast<int>(rangesArray.arrayLen()));
}
void InsertPlanNode::loadFromJSONObject(PlannerDomValue obj)
{
AbstractOperationPlanNode::loadFromJSONObject(obj);
m_multiPartition = obj.valueForKey("MULTI_PARTITION").asBool();
if (obj.hasNonNullKey("FIELD_MAP")) {
PlannerDomValue fieldMap = obj.valueForKey("FIELD_MAP");
for (int i = 0; i < fieldMap.arrayLen(); ++i) {
m_fieldMap.push_back(fieldMap.valueAtIndex(i).asInt());
}
}
m_isUpsert = false;
if (obj.hasNonNullKey("UPSERT")) {
m_isUpsert = true;
}
m_sourceIsPartitioned = false;
if (obj.hasNonNullKey("SOURCE_IS_PARTITIONED")) {
m_sourceIsPartitioned = true;
}
}
// ----------------------------------------------------
// Serialization Functions
// ----------------------------------------------------
AbstractPlanNode*
AbstractPlanNode::fromJSONObject(PlannerDomValue obj) {
string typeString = obj.valueForKey("PLAN_NODE_TYPE").asStr();
//FIXME: EVEN if this leak guard is warranted --
// like we EXPECT to be catching plan deserialization exceptions
// and our biggest concern will be the memory this may leak? --
// we don't need to be mediating all the node
// pointer dereferences through the smart pointer.
// Why not just get() it and forget it until .release() time?
// As is, it just makes single-step debugging awkward.
std::auto_ptr<AbstractPlanNode> node(
plannodeutil::getEmptyPlanNode(stringToPlanNode(typeString)));
node->m_planNodeId = obj.valueForKey("ID").asInt();
PlannerDomValue inlineNodesValue = obj.valueForKey("INLINE_NODES");
for (int i = 0; i < inlineNodesValue.arrayLen(); i++) {
PlannerDomValue inlineNodeObj = inlineNodesValue.valueAtIndex(i);
AbstractPlanNode *newNode = AbstractPlanNode::fromJSONObject(inlineNodeObj);
// todo: if this throws, new Node can be leaked.
// As long as newNode is not NULL, this will not throw.
assert(newNode);
node->addInlinePlanNode(newNode);
}
PlannerDomValue parentIdsArray = obj.valueForKey("PARENT_IDS");
for (int i = 0; i < parentIdsArray.arrayLen(); i++) {
int32_t parentNodeId = parentIdsArray.valueAtIndex(i).asInt();
node->m_parentIds.push_back(parentNodeId);
}
PlannerDomValue childNodeIdsArray = obj.valueForKey("CHILDREN_IDS");
for (int i = 0; i < childNodeIdsArray.arrayLen(); i++) {
int32_t childNodeId = childNodeIdsArray.valueAtIndex(i).asInt();
node->m_childIds.push_back(childNodeId);
}
// Output schema are optional -- when they can be determined by a child's copy.
if (obj.hasKey("OUTPUT_SCHEMA")) {
PlannerDomValue outputSchemaArray = obj.valueForKey("OUTPUT_SCHEMA");
for (int i = 0; i < outputSchemaArray.arrayLen(); i++) {
PlannerDomValue outputColumnValue = outputSchemaArray.valueAtIndex(i);
SchemaColumn* outputColumn = new SchemaColumn(outputColumnValue);
node->m_outputSchema.push_back(outputColumn);
}
node->m_validOutputColumnCount = static_cast<int>(node->m_outputSchema.size());
}
// Anticipate and mark the two different scenarios of missing output schema.
// The actual output schema can be searched for on demand once the whole plan tree is loaded.
// If there's an inline projection node,
// one of its chief purposes is defining the parent's output schema.
else if (node->getInlinePlanNode(PLAN_NODE_TYPE_PROJECTION)) {
node->m_validOutputColumnCount = SCHEMA_UNDEFINED_SO_GET_FROM_INLINE_PROJECTION;
}
// Otherwise, the node is relying on a child's output schema, possibly several levels down,
// OR it is just an inline node (e.g. a LIMIT) or a DML node,
// whose output schema is known from its context or is otherwise not of any interest.
else {
node->m_validOutputColumnCount = SCHEMA_UNDEFINED_SO_GET_FROM_CHILD;
}
node->loadFromJSONObject(obj);
AbstractPlanNode* retval = node.get();
node.release();
assert(retval);
return retval;
}
AbstractExpression*
AbstractExpression::buildExpressionTree_recurse(PlannerDomValue obj)
{
// build a tree recursively from the bottom upwards.
// when the expression node is instantiated, its type,
// value and child types will have been discovered.
ExpressionType peek_type = EXPRESSION_TYPE_INVALID;
ValueType value_type = VALUE_TYPE_INVALID;
bool inBytes = false;
AbstractExpression *left_child = NULL;
AbstractExpression *right_child = NULL;
std::vector<AbstractExpression*>* argsVector = NULL;
// read the expression type
peek_type = static_cast<ExpressionType>(obj.valueForKey("TYPE").asInt());
assert(peek_type != EXPRESSION_TYPE_INVALID);
if (obj.hasNonNullKey("VALUE_TYPE")) {
int32_t value_type_int = obj.valueForKey("VALUE_TYPE").asInt();
value_type = static_cast<ValueType>(value_type_int);
assert(value_type != VALUE_TYPE_INVALID);
if (obj.hasNonNullKey("IN_BYTES")) {
inBytes = true;
}
}
// add the value size
int valueSize = -1;
if (obj.hasNonNullKey("VALUE_SIZE")) {
valueSize = obj.valueForKey("VALUE_SIZE").asInt();
} else {
// This value size should be consistent with VoltType.java
valueSize = NValue::getTupleStorageSize(value_type);
}
// recurse to children
try {
if (obj.hasNonNullKey("LEFT")) {
PlannerDomValue leftValue = obj.valueForKey("LEFT");
left_child = AbstractExpression::buildExpressionTree_recurse(leftValue);
}
if (obj.hasNonNullKey("RIGHT")) {
PlannerDomValue rightValue = obj.valueForKey("RIGHT");
right_child = AbstractExpression::buildExpressionTree_recurse(rightValue);
}
// NULL argsVector corresponds to a missing ARGS value
// vs. an empty argsVector which corresponds to an empty array ARGS value.
// Different expression types could assert either a NULL or non-NULL argsVector initializer.
if (obj.hasNonNullKey("ARGS")) {
PlannerDomValue argsArray = obj.valueForKey("ARGS");
argsVector = new std::vector<AbstractExpression*>();
for (int i = 0; i < argsArray.arrayLen(); i++) {
PlannerDomValue argValue = argsArray.valueAtIndex(i);
AbstractExpression* argExpr = AbstractExpression::buildExpressionTree_recurse(argValue);
argsVector->push_back(argExpr);
}
}
// invoke the factory. obviously it has to handle null children.
// pass it the serialization stream in case a subclass has more
// to read. yes, the per-class data really does follow the
// child serializations.
AbstractExpression* finalExpr = ExpressionUtil::expressionFactory(obj, peek_type, value_type, valueSize,
left_child, right_child, argsVector);
finalExpr->setInBytes(inBytes);
return finalExpr;
}
catch (const SerializableEEException &ex) {
delete left_child;
delete right_child;
delete argsVector;
throw;
}
}