vaclavt/usql
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

extract functions to own file

Browse Source
This commit is contained in:
VaclavT
2021-12-18 13:37:42 +01:00
parent c9c4f0fba3
commit 906df74847
8 changed files with 184 additions and 164 deletions
Download Patch File Download Diff File Expand all files Collapse all files

152
usql.cpp
View File

@@ -19,7 +19,6 @@ std::unique_ptr<Table> USql::execute(const std::string &command) {
}
std::unique_ptr<Table> USql::execute(Node &node) {
// TODO optimize execution nodes here
switch (node.node_type) {
case NodeType::create_table:
return execute_create_table(static_cast<CreateTableNode &>(node));
@@ -167,8 +166,7 @@ std::unique_ptr<ValueNode> USql::eval_literal_value_node(Row &row, Node *node) {
}
std::unique_ptr<ValueNode>
USql::eval_function_value_node(Table *table, Row &row, Node *node, ColDefNode *col_def_node, ColValue *agg_func_value) {
std::unique_ptr<ValueNode> USql::eval_function_value_node(Table *table, Row &row, Node *node, ColDefNode *col_def_node, ColValue *agg_func_value) {
auto *fnc = static_cast<FunctionNode *>(node);
std::vector<std::unique_ptr<ValueNode>> evaluatedPars;
@@ -194,14 +192,6 @@ USql::eval_function_value_node(Table *table, Row &row, Node *node, ColDefNode *c
throw Exception("invalid function: " + fnc->function);
}
std::unique_ptr<ValueNode> USql::count_function(ColValue *agg_func_value, const std::vector<std::unique_ptr<ValueNode>> &evaluatedPars) {
long c = 1;
if (!agg_func_value->isNull()) {
c = agg_func_value->getIntegerValue() + 1;
}
return std::make_unique<IntValueNode>(c);
}
bool USql::eval_logical_operator(LogicalOperatorNode &node, Table *pTable, Row &row) {
//bool left = eval_relational_operator(static_cast<const RelationalOperatorNode &>(*node.left), pTable, row);
@@ -274,144 +264,6 @@ std::unique_ptr<ValueNode> USql::eval_arithmetic_operator(ColumnType outType, Ar
throw Exception("implement me!!");
}
std::unique_ptr<ValueNode> USql::to_string_function(const std::vector<std::unique_ptr<ValueNode>> &evaluatedPars) {
long date = evaluatedPars[0]->getDateValue();
std::string format = evaluatedPars[1]->getStringValue();
std::string formatted_date = date_to_string(date, format);
return std::make_unique<StringValueNode>(formatted_date);
}
std::unique_ptr<ValueNode> USql::to_date_function(const std::vector<std::unique_ptr<ValueNode>> &evaluatedPars) {
std::string date = evaluatedPars[0]->getStringValue();
std::string format = evaluatedPars[1]->getStringValue();
long epoch_time = string_to_date(date, format);
return std::make_unique<IntValueNode>(epoch_time); // No DateValueNode for now
}
std::unique_ptr<ValueNode> USql::date_add_function(const std::vector<std::unique_ptr<ValueNode>> &evaluatedPars) {
long datetime = evaluatedPars[0]->getDateValue();
long quantity = evaluatedPars[1]->getIntegerValue();
std::string part = evaluatedPars[2]->getStringValue();
long new_date = add_to_date(datetime, quantity, part);
return std::make_unique<IntValueNode>(new_date); // No DateValueNode for now
}
std::unique_ptr<ValueNode> USql::upper_function(const std::vector<std::unique_ptr<ValueNode>> &evaluatedPars) {
std::string str = evaluatedPars[0]->getStringValue();
std::transform(str.begin(), str.end(), str.begin(), [](unsigned char c) -> unsigned char { return toupper(c); });
return std::make_unique<StringValueNode>(str);
}
std::unique_ptr<ValueNode> USql::lower_function(const std::vector<std::unique_ptr<ValueNode>> &evaluatedPars) {
std::string str = evaluatedPars[0]->getStringValue();
std::transform(str.begin(), str.end(), str.begin(), [](unsigned char c) -> unsigned char { return tolower(c); });
return std::make_unique<StringValueNode>(str);
}
std::unique_ptr<ValueNode> USql::pp_function(const std::vector<std::unique_ptr<ValueNode>> &evaluatedPars) {
auto &parsed_value = evaluatedPars[0];
if (parsed_value->node_type == NodeType::int_value || parsed_value->node_type == NodeType::float_value) {
std::string format = evaluatedPars.size() > 1 ? evaluatedPars[1]->getStringValue() : "";
char buf[20] {0}; // TODO constant here
double value = parsed_value->getDoubleValue();
if (format == "100%")
std::snprintf(buf, 20, "%.2f%%", value);
else if (format == "%.2f")
std::snprintf(buf, 20, "%.2f", value);
else if (value >= 1000000000000)
std::snprintf(buf, 20, "%7.2fT", value/1000000000000);
else if (value >= 1000000000)
std::sprintf(buf, "%7.2fB", value/1000000000);
else if (value >= 1000000)
std::snprintf(buf, 20, "%7.2fM", value/1000000);
else if (value >= 100000)
std::snprintf(buf, 20, "%7.2fM", value/100000); // 0.12M
else if (value <= -1000000000000)
std::snprintf(buf, 20, "%7.2fT", value/1000000000000);
else if (value <= -1000000000)
std::snprintf(buf, 20, "%7.2fB", value/1000000000);
else if (value <= -1000000)
std::snprintf(buf, 20, "%7.2fM", value/1000000);
else if (value <= -100000)
std::snprintf(buf, 20, "%7.2fM", value/100000); // 0.12M
else if (value == 0)
buf[0]='0';
else
return std::make_unique<StringValueNode>(parsed_value->getStringValue().substr(0, 10));
// TODO introduce constant for 10
std::string s {buf};
return std::make_unique<StringValueNode>(string_padd(s.erase(s.find_last_not_of(' ')+1), 10, ' ', false));
}
return std::make_unique<StringValueNode>(parsed_value->getStringValue());
}
std::unique_ptr<ValueNode>
USql::max_function(const std::vector<std::unique_ptr<ValueNode>> &evaluatedPars, const ColDefNode *col_def_node,
ColValue *agg_func_value) {
if (col_def_node->type == ColumnType::integer_type || col_def_node->type == ColumnType::date_type) {
if (!evaluatedPars[0]->isNull()) {
long val = evaluatedPars[0]->getIntegerValue();
if (agg_func_value->isNull()) {
return std::make_unique<IntValueNode>(val);
} else {
return std::make_unique<IntValueNode>(std::max(val, agg_func_value->getIntegerValue()));
}
} else {
return std::make_unique<IntValueNode>(agg_func_value->getIntegerValue());
}
} else if (col_def_node->type == ColumnType::float_type) {
if (!evaluatedPars[0]->isNull()) {
double val = evaluatedPars[0]->getDoubleValue();
if (agg_func_value->isNull()) {
return std::make_unique<DoubleValueNode>(val);
} else {
return std::make_unique<DoubleValueNode>(std::max(val, agg_func_value->getDoubleValue()));
}
} else {
return std::make_unique<DoubleValueNode>(agg_func_value->getDoubleValue());
}
}
// TODO string and boolean
throw Exception("unsupported data type for max function");
}
std::unique_ptr<ValueNode>
USql::min_function(const std::vector<std::unique_ptr<ValueNode>> &evaluatedPars, const ColDefNode *col_def_node,
ColValue *agg_func_value) {
if (col_def_node->type == ColumnType::integer_type || col_def_node->type == ColumnType::date_type) {
if (!evaluatedPars[0]->isNull()) {
long val = evaluatedPars[0]->getIntegerValue();
if (agg_func_value->isNull()) {
return std::make_unique<IntValueNode>(val);
} else {
return std::make_unique<IntValueNode>(std::min(val, agg_func_value->getIntegerValue()));
}
} else {
return std::make_unique<IntValueNode>(agg_func_value->getIntegerValue());
}
} else if (col_def_node->type == ColumnType::float_type) {
if (!evaluatedPars[0]->isNull()) {
double val = evaluatedPars[0]->getDoubleValue();
if (agg_func_value->isNull()) {
return std::make_unique<DoubleValueNode>(val);
} else {
return std::make_unique<DoubleValueNode>(std::min(val, agg_func_value->getDoubleValue()));
}
} else {
return std::make_unique<DoubleValueNode>(agg_func_value->getDoubleValue());
}
}
// TODO string and boolean
throw Exception("unsupported data type for min function");
}
Table *USql::find_table(const std::string &name) const {
auto name_cmp = [name](const Table& t) { return t.m_name == name; };
@@ -437,4 +289,4 @@ void USql::check_index_not_exists(const std::string &index_name) {
throw Exception("index already exists");
}
} // namespace
} // namespace