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usql update

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This commit is contained in:
VaclavT
2021-08-23 18:14:05 +02:00
parent 8d220356f2
commit 0e90d6047c
28 changed files with 1623 additions and 3774 deletions
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351
usql/usql.cpp
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@@ -1,6 +1,7 @@
#include "usql.h"
#include "exception.h"
#include "ml_date.h"
#include "ml_string.h"
#include <algorithm>
#include <fstream>
@@ -25,6 +26,8 @@ std::unique_ptr<Table> USql::execute(Node &node) {
return execute_create_table(static_cast<CreateTableNode &>(node));
case NodeType::create_table_as_select:
return execute_create_table_as_table(static_cast<CreateTableAsSelectNode &>(node));
case NodeType::drop_table:
return execute_drop(static_cast<DropTableNode &>(node));
case NodeType::insert_into:
return execute_insert_into_table(static_cast<InsertIntoTableNode &>(node));
case NodeType::select_from:
@@ -37,8 +40,10 @@ std::unique_ptr<Table> USql::execute(Node &node) {
return execute_load(static_cast<LoadIntoTableNode &>(node));
case NodeType::save_table:
return execute_save(static_cast<SaveTableNode &>(node));
case NodeType::drop_table:
return execute_drop(static_cast<DropTableNode &>(node));
case NodeType::set:
return execute_set(static_cast<SetNode &>(node));
case NodeType::show:
return execute_show(static_cast<ShowNode &>(node));
default:
return create_stmt_result_table(-1, "unknown statement", 0);
}
@@ -68,7 +73,7 @@ std::unique_ptr<Table> USql::execute_create_table_as_table(CreateTableAsSelectNo
// must be here, if rows are put into new_table, they are lost during m_tables.push_table
Table *table = find_table(node.table_name);
for( Row& orig_row : select->m_rows) {
table->add_copy_of_row(orig_row);
table->commit_copy_of_row(orig_row);
}
select.release(); // is it correct? hoping not to release select table here and then when releasing CreateTableAsSelectNode
@@ -83,12 +88,14 @@ std::unique_ptr<Table> USql::execute_load(LoadIntoTableNode &node) {
Table *table_def = find_table(node.table_name);
// read data
std::ifstream ifs(node.filename);
std::string content((std::istreambuf_iterator<char>(ifs)),
(std::istreambuf_iterator<char>()));
// std::ifstream ifs(node.filename);
// std::string content((std::istreambuf_iterator<char>(ifs)),
// (std::istreambuf_iterator<char>()));
// load rows
auto rows_cnt = table_def->load_csv_string(content);
// auto rows_cnt = table_def->load_csv_string(content);
auto rows_cnt = table_def->load_csv_file(node.filename);
return create_stmt_result_table(0, "load succeeded", rows_cnt);
}
@@ -106,7 +113,7 @@ std::unique_ptr<Table> USql::execute_save(SaveTableNode &node) {
file << csv_string;
file.close();
return create_stmt_result_table(0, "save succeeded", 0);
return create_stmt_result_table(0, "save succeeded", table_def->rows_count());
}
std::unique_ptr<Table> USql::execute_drop(DropTableNode &node) {
@@ -121,25 +128,36 @@ std::unique_ptr<Table> USql::execute_drop(DropTableNode &node) {
throw Exception("table not found (" + node.table_name + ")");
}
std::unique_ptr<Table> USql::execute_insert_into_table(InsertIntoTableNode &node) {
// TODO check column names.size = values.size
std::unique_ptr<Table> USql::execute_set(SetNode &node) {
Settings::set_setting(node.name, node.value);
return create_stmt_result_table(0, "set succeeded", 1);
}
std::unique_ptr<Table> USql::execute_show(ShowNode &node) {
std::string value = Settings::get_setting(node.name);
return create_stmt_result_table(0, "show succeeded: " + value, 1);
}
std::unique_ptr<Table> USql::execute_insert_into_table(InsertIntoTableNode &node) {
// find table
Table *table_def = find_table(node.table_name);
if (node.cols_names.size() != node.cols_values.size())
throw Exception("Incorrect number of values");
// prepare empty new_row
Row new_row = table_def->create_empty_row();
Row& new_row = table_def->create_empty_row();
// copy values
for (size_t i = 0; i < node.cols_names.size(); i++) {
ColDefNode col_def = table_def->get_column_def(node.cols_names[i].name);
ColDefNode col_def = table_def->get_column_def(node.cols_names[i].col_name);
auto col_value = eval_value_node(table_def, new_row, node.cols_values[i].get());
new_row.setColumnValue(&col_def, col_value.get());
}
// append new_row
table_def->add_row(new_row);
table_def->commit_row(new_row);
return create_stmt_result_table(0, "insert succeeded", 1);
}
@@ -149,14 +167,22 @@ std::unique_ptr<Table> USql::execute_select(SelectFromTableNode &node) {
// find source table
Table *table = find_table(node.table_name);
// expand *
if (node.cols_names->size()==1 && node.cols_names->operator[](0).name == "*") {
node.cols_names->clear();
node.cols_names->reserve(table->columns_count());
for(const auto& col : table->m_col_defs) {
node.cols_names->emplace_back(SelectColNode{std::make_unique<DatabaseValueNode>(col.name), col.name});
}
}
// create result table
std::vector<ColDefNode> result_tbl_col_defs{};
std::vector<int> source_table_col_index{};
for (int i = 0; i < node.cols_names->size(); i++) {
auto [ src_tbl_col_index, rst_tbl_col_def ] = get_column_definition(table,
&node.cols_names->operator[](i), i);
auto [src_tbl_col_index, rst_tbl_col_def] = get_column_definition(table, &node.cols_names->operator[](i), i);
source_table_col_index.push_back(src_tbl_col_index);
result_tbl_col_defs.push_back(rst_tbl_col_def);
@@ -168,72 +194,153 @@ std::unique_ptr<Table> USql::execute_select(SelectFromTableNode &node) {
for (auto row = begin(table->m_rows); row != end(table->m_rows); ++row) {
// eval where for row
if (eval_where(node.where.get(), table, *row)) {
// prepare empty row
Row new_row = result->create_empty_row();
// prepare empty row and copy column values
Row& new_row = result->create_empty_row();
// copy column values
for (auto idx = 0; idx < result->columns_count(); idx++) {
auto row_col_index = source_table_col_index[idx];
if (row_col_index == -1) { // TODO introduce constant here
auto evaluated_value = eval_value_node(table, *row, node.cols_names->operator[](
idx).value.get());
if (row_col_index == FUNCTION_CALL) {
auto evaluated_value = eval_value_node(table, *row, node.cols_names->operator[](idx).value.get());
ValueNode *col_value = evaluated_value.get();
new_row.setColumnValue(&result_tbl_col_defs[idx], col_value);
} else {
ColValue *col_value = row->ith_column(row_col_index);
ColValue &col_value = row->operator[](row_col_index);
new_row.setColumnValue(&result_tbl_col_defs[idx], col_value);
}
}
// add row to result
result->m_rows.push_back(new_row);
result->commit_row(new_row);
}
}
return std::move(result);
execute_distinct(node, result.get());
execute_order_by(node, table, result.get());
execute_offset_limit(node.offset_limit, result.get());
return result;
}
void USql::execute_distinct(SelectFromTableNode &node, Table *result) {
if (!node.distinct) return;
auto compare_rows = [](const Row &a, const Row &b) { return a.compare(b) >= 0; };
std::sort(result->m_rows.begin(), result->m_rows.end(), compare_rows);
result->m_rows.erase(std::unique(result->m_rows.begin(), result->m_rows.end()), result->m_rows.end());
}
void USql::execute_order_by(SelectFromTableNode &node, Table *table, Table *result) {
if (node.order_by.empty()) return;
auto compare_rows = [&node, &result](const Row &a, const Row &b) {
for(const auto& order_by_col_def : node.order_by) {
// TODO validate index
ColDefNode col_def = result->get_column_def(order_by_col_def.col_index - 1);
ColValue &a_val = a[col_def.order];
ColValue &b_val = b[col_def.order];
int compare = a_val.compare(b_val);
if (compare < 0) return order_by_col_def.ascending;
if (compare > 0) return !order_by_col_def.ascending;
}
return false;
};
std::sort(result->m_rows.begin(), result->m_rows.end(), compare_rows);
}
void USql::execute_offset_limit(OffsetLimitNode &node, Table *result) {
if (node.offset > 0)
result->m_rows.erase(result->m_rows.begin(),
result->rows_count() > node.offset ? result->m_rows.begin() + node.offset : result->m_rows.end());
if (node.limit > 0 && node.limit < result->rows_count())
result->m_rows.erase(result->m_rows.begin() + node.limit, result->m_rows.end());
}
std::tuple<int, ColDefNode> USql::get_column_definition(Table *table, SelectColNode *select_col_node, int col_order ) {
std::string new_col_name = select_col_node->name;
return get_node_definition(table, select_col_node->value.get(), select_col_node->name, col_order );
}
if (select_col_node->value->node_type == NodeType::column_name) {
ColDefNode src_cdef = table->get_column_def(new_col_name);
ColDefNode cdef = ColDefNode{new_col_name, src_cdef.type, col_order, src_cdef.length, src_cdef.null};
return std::make_tuple(src_cdef.order, cdef);
std::tuple<int, ColDefNode> USql::get_node_definition(Table *table, Node * node, const std::string & col_name, int col_order ) {
if (node->node_type == NodeType::database_value) {
auto dbval_node = static_cast<DatabaseValueNode *>(node);
} else if (select_col_node->value->node_type == NodeType::function) {
auto node = static_cast<FunctionNode *>(select_col_node->value.get());
ColDefNode src_col_def = table->get_column_def(dbval_node->col_name);
ColDefNode col_def = ColDefNode{col_name, src_col_def.type, col_order, src_col_def.length, src_col_def.null};
return std::make_tuple(src_col_def.order, col_def);
if (node->function == "to_string") {
ColDefNode cdef = ColDefNode{new_col_name, ColumnType::varchar_type, col_order, 64, true};
return std::make_tuple(-1, cdef);
} else if (node->function == "to_date") {
ColDefNode cdef = ColDefNode{new_col_name, ColumnType::integer_type, col_order, 1, true};
return std::make_tuple(-1, cdef);
} else if (node->node_type == NodeType::function) {
auto func_node = static_cast<FunctionNode *>(node);
if (func_node->function == "to_string") {
ColDefNode col_def = ColDefNode{col_name, ColumnType::varchar_type, col_order, 32, true};
return std::make_tuple(-1, col_def);
} else if (func_node->function == "to_date") {
ColDefNode col_def = ColDefNode{col_name, ColumnType::integer_type, col_order, 1, true};
return std::make_tuple(-1, col_def);
} else if (func_node->function == "pp") {
ColDefNode col_def = ColDefNode{col_name, ColumnType::varchar_type, col_order, 10, true};
return std::make_tuple(-1, col_def);
}
throw Exception("Unsupported function");
} else if (node->node_type == NodeType::arithmetical_operator) {
auto ari_node = static_cast<ArithmeticalOperatorNode *>(node);
auto [left_col_index, left_tbl_col_def] = get_node_definition(table, ari_node->left.get(), col_name, col_order );
auto [right_col_index, right_tbl_col_def] = get_node_definition(table, ari_node->right.get(), col_name, col_order );
ColumnType col_type; // TODO handle varchar and it len
if (left_tbl_col_def.type==ColumnType::float_type || right_tbl_col_def.type==ColumnType::float_type)
col_type = ColumnType::float_type;
else
col_type = ColumnType::integer_type;
ColDefNode col_def = ColDefNode{col_name, col_type, col_order, 1, true};
return std::make_tuple(-1, col_def);
} else if (node->node_type == NodeType::logical_operator) {
ColDefNode col_def = ColDefNode{col_name, ColumnType::bool_type, col_order, 1, true};
return std::make_tuple(-1, col_def);
} else if (node->node_type == NodeType::int_value) {
ColDefNode col_def = ColDefNode{col_name, ColumnType::integer_type, col_order, 1, true};
return std::make_tuple(-1, col_def);
} else if (node->node_type == NodeType::float_value) {
ColDefNode col_def = ColDefNode{col_name, ColumnType::float_type, col_order, 1, true};
return std::make_tuple(-1, col_def);
} else if (node->node_type == NodeType::string_value) {
// TODO right len
ColDefNode col_def = ColDefNode{col_name, ColumnType::varchar_type, col_order, 64, true};
return std::make_tuple(-1, col_def);
}
throw Exception("Unsupported node type");
}
std::unique_ptr<Table> USql::execute_delete(DeleteFromTableNode &node) {
// find source table
Table *table = find_table(node.table_name);
// execute access plan
int affected_rows = 0;
auto it = table->m_rows.begin();
for (; it != table->m_rows.end();) {
if (eval_where(node.where.get(), table, *it)) {
it = table->m_rows.erase(it);
affected_rows++;
} else {
++it;
}
}
auto affected_rows = table->rows_count();
table->m_rows.erase(
std::remove_if(table->m_rows.begin(), table->m_rows.end(),
[&node, table](Row &row){return eval_where(node.where.get(), table, row);}),
table->m_rows.end());
affected_rows -= table->rows_count();
return create_stmt_result_table(0, "delete succeeded", affected_rows);
}
@@ -250,12 +357,13 @@ std::unique_ptr<Table> USql::execute_update(UpdateTableNode &node) {
if (eval_where(node.where.get(), table, *row)) {
int i = 0;
for (const auto& col : node.cols_names) {
ColDefNode col_def = table->get_column_def(col.name); // TODO cache it like in select
// TODO cache it like in select
ColDefNode col_def = table->get_column_def(col.col_name);
std::unique_ptr<ValueNode> new_val = eval_arithmetic_operator(col_def.type,
static_cast<ArithmeticalOperatorNode &>(*node.values[i]),
table, *row);
table->validate_column(&col_def, new_val.get());
usql::Table::validate_column(&col_def, new_val.get());
row->setColumnValue(&col_def, new_val.get());
i++;
}
@@ -268,8 +376,8 @@ std::unique_ptr<Table> USql::execute_update(UpdateTableNode &node) {
}
bool USql::eval_where(Node *where, Table *table, Row &row) const {
switch (where->node_type) { // no where clause
bool USql::eval_where(Node *where, Table *table, Row &row) {
switch (where->node_type) {
case NodeType::true_node:
return true;
case NodeType::relational_operator: // just one condition
@@ -284,22 +392,27 @@ bool USql::eval_where(Node *where, Table *table, Row &row) const {
}
bool USql::eval_relational_operator(const RelationalOperatorNode &filter, Table *table, Row &row) const {
bool USql::eval_relational_operator(const RelationalOperatorNode &filter, Table *table, Row &row) {
std::unique_ptr<ValueNode> left_value = eval_value_node(table, row, filter.left.get());
std::unique_ptr<ValueNode> right_value = eval_value_node(table, row, filter.right.get());
double comparator;
if (left_value->node_type == NodeType::int_value && right_value->node_type == NodeType::int_value) {
comparator = left_value->getIntValue() - right_value->getIntValue();
comparator = left_value->getIntegerValue() - right_value->getIntegerValue();
} else if ((left_value->node_type == NodeType::int_value && right_value->node_type == NodeType::float_value) ||
(left_value->node_type == NodeType::float_value && right_value->node_type == NodeType::int_value) ||
(left_value->node_type == NodeType::float_value && right_value->node_type == NodeType::float_value)) {
comparator = left_value->getDoubleValue() - right_value->getDoubleValue();
} else if (left_value->node_type == NodeType::string_value || right_value->node_type == NodeType::string_value) {
comparator = left_value->getStringValue().compare(right_value->getStringValue());
} else if (left_value->node_type == NodeType::bool_value && right_value->node_type == NodeType::bool_value) {
bool bl = left_value->getBooleanValue();
bool br = right_value->getBooleanValue();
comparator = bl == br ? 0 : 1;
// date values are essentially int values so handled above
} else {
// TODO throw exception
throw Exception("Undefined combination of types");
}
switch (filter.op) {
@@ -322,16 +435,16 @@ bool USql::eval_relational_operator(const RelationalOperatorNode &filter, Table
std::unique_ptr<ValueNode> USql::eval_value_node(Table *table, Row &row, Node *node) {
if (node->node_type == NodeType::database_value || node->node_type == NodeType::column_name) { // TODO sjednotit
if (node->node_type == NodeType::database_value) {
return eval_database_value_node(table, row, node);
} else if (node->node_type == NodeType::int_value || node->node_type == NodeType::float_value || node->node_type == NodeType::string_value) {
} else if (node->node_type == NodeType::int_value || node->node_type == NodeType::float_value || node->node_type == NodeType::string_value || node->node_type == NodeType::bool_value) {
return eval_literal_value_node(table, row, node);
} else if (node->node_type == NodeType::function) {
return eval_function_value_node(table, row, node);
} else if (node->node_type == NodeType::null_value) {
return std::make_unique<NullValueNode>();
} else if (node->node_type == NodeType::arithmetical_operator) {
return eval_arithmetic_operator(ColumnType::float_type, static_cast<ArithmeticalOperatorNode &>(*node), table, row);
}
throw Exception("unsupported node type");
}
@@ -340,17 +453,22 @@ std::unique_ptr<ValueNode> USql::eval_value_node(Table *table, Row &row, Node *n
std::unique_ptr<ValueNode> USql::eval_database_value_node(Table *table, Row &row, Node *node) {
auto *dvl = static_cast<DatabaseValueNode *>(node);
ColDefNode col_def = table->get_column_def( dvl->col_name); // TODO optimize it to just get this def once
auto db_value = row.ith_column(col_def.order);
ColValue &db_value = row[col_def.order];
if (db_value.isNull())
return std::make_unique<NullValueNode>();
if (col_def.type == ColumnType::integer_type)
return std::make_unique<IntValueNode>(db_value.getIntValue());
if (col_def.type == ColumnType::float_type)
return std::make_unique<DoubleValueNode>(db_value.getDoubleValue());
if (col_def.type == ColumnType::varchar_type)
return std::make_unique<StringValueNode>(db_value.getStringValue());
if (col_def.type == ColumnType::bool_type)
return std::make_unique<BooleanValueNode>(db_value.getBoolValue());
if (col_def.type == ColumnType::date_type)
return std::make_unique<IntValueNode>(db_value.getIntValue());
if (col_def.type == ColumnType::integer_type) {
return std::make_unique<IntValueNode>(db_value->getIntValue());
}
if (col_def.type == ColumnType::float_type) {
return std::make_unique<DoubleValueNode>(db_value->getDoubleValue());
}
if (col_def.type == ColumnType::varchar_type) {
return std::make_unique<StringValueNode>(db_value->getStringValue());
}
throw Exception("unknown database value type");
}
@@ -368,7 +486,11 @@ std::unique_ptr<ValueNode> USql::eval_literal_value_node(Table *table, Row &row,
auto *ivl = static_cast<StringValueNode *>(node);
return std::make_unique<StringValueNode>(ivl->value);
} else if (node->node_type == NodeType::bool_value) {
auto *ivl = static_cast<BooleanValueNode *>(node);
return std::make_unique<BooleanValueNode>(ivl->value);
}
// Date has no it's own value node (it is passed around as string)
throw Exception("invalid type");
}
@@ -382,6 +504,10 @@ std::unique_ptr<ValueNode> USql::eval_function_value_node(Table *table, Row &row
evaluatedPars.push_back(eval_value_node(table, row, param.get()));
}
// at this moment no functions without parameter(s) or first param can be null
if (evaluatedPars.empty() || evaluatedPars[0]->isNull())
return std::make_unique<NullValueNode>();
// TODO use some enum
if (fnc->function == "lower") {
std::string str = evaluatedPars[0]->getStringValue();
@@ -398,31 +524,71 @@ std::unique_ptr<ValueNode> USql::eval_function_value_node(Table *table, Row &row
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);
return std::make_unique<IntValueNode>(epoch_time); // No DateValueNode for now
}
if (fnc->function == "to_string") {
long date = evaluatedPars[0]->getIntValue();
long date = evaluatedPars[0]->getDateValue();
std::string format = evaluatedPars[1]->getStringValue();
std::string formated_date = date_to_string(date, format);
return std::make_unique<StringValueNode>(formated_date);
std::string formatted_date = date_to_string(date, format);
return std::make_unique<StringValueNode>(formatted_date);
}
if (fnc->function == "pp") {
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[16] {0};
double value = parsed_value->getDoubleValue();
if (format == "100%")
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());
}
throw Exception("invalid function");
}
bool USql::eval_logical_operator(LogicalOperatorNode &node, Table *pTable, Row &row) const {
bool left = eval_relational_operator(static_cast<const RelationalOperatorNode &>(*node.left), pTable, row);
bool USql::eval_logical_operator(LogicalOperatorNode &node, Table *pTable, Row &row) {
//bool left = eval_relational_operator(static_cast<const RelationalOperatorNode &>(*node.left), pTable, row);
bool left = eval_where(&(*node.left), pTable, row);
if ((node.op == LogicalOperatorType::and_operator && !left) || (node.op == LogicalOperatorType::or_operator && left))
return left;
bool right = eval_relational_operator(static_cast<const RelationalOperatorNode &>(*node.right), pTable, row);
//bool right = eval_relational_operator(static_cast<const RelationalOperatorNode &>(*node.right), pTable, row);
bool right = eval_where(&(*node.right), pTable, row);
return right;
}
std::unique_ptr<ValueNode> USql::eval_arithmetic_operator(ColumnType outType, ArithmeticalOperatorNode &node, Table *table, Row &row) const {
std::unique_ptr<ValueNode> USql::eval_arithmetic_operator(ColumnType outType, ArithmeticalOperatorNode &node, Table *table, Row &row) {
if (node.op == ArithmeticalOperatorType::copy_value) {
return eval_value_node(table, row, node.left.get());
}
@@ -430,6 +596,9 @@ std::unique_ptr<ValueNode> USql::eval_arithmetic_operator(ColumnType outType, Ar
std::unique_ptr<ValueNode> left = eval_value_node(table, row, node.left.get());
std::unique_ptr<ValueNode> right = eval_value_node(table, row, node.right.get());
if (left->isNull() || right->isNull())
return std::make_unique<NullValueNode>();
if (outType == ColumnType::float_type) {
double l = ((ValueNode *) left.get())->getDoubleValue();
double r = ((ValueNode *) right.get())->getDoubleValue();
@@ -447,8 +616,8 @@ std::unique_ptr<ValueNode> USql::eval_arithmetic_operator(ColumnType outType, Ar
}
} else if (outType == ColumnType::integer_type) {
long l = ((ValueNode *) left.get())->getIntValue();
long r = ((ValueNode *) right.get())->getIntValue();
long l = ((ValueNode *) left.get())->getIntegerValue();
long r = ((ValueNode *) right.get())->getIntegerValue();
switch (node.op) {
case ArithmeticalOperatorType::plus_operator:
return std::make_unique<IntValueNode>(l + r);
@@ -472,26 +641,27 @@ std::unique_ptr<ValueNode> USql::eval_arithmetic_operator(ColumnType outType, Ar
throw Exception("implement me!!");
}
}
// TODO date node should support addition and subtraction
throw Exception("implement me!!");
}
std::unique_ptr<Table> USql::create_stmt_result_table(long code, const std::string &text, long affected_rows) {
std::unique_ptr<Table> USql::create_stmt_result_table(long code, const std::string &text, size_t affected_rows) {
std::vector<ColDefNode> result_tbl_col_defs{};
result_tbl_col_defs.push_back(ColDefNode("code", ColumnType::integer_type, 0, 1, false));
result_tbl_col_defs.push_back(ColDefNode("desc", ColumnType::varchar_type, 1, 255, false));
result_tbl_col_defs.push_back(ColDefNode("affected_rows", ColumnType::integer_type, 0, 1, true));
result_tbl_col_defs.emplace_back("code", ColumnType::integer_type, 0, 1, false);
result_tbl_col_defs.emplace_back("desc", ColumnType::varchar_type, 1, 48, false);
result_tbl_col_defs.emplace_back("affected_rows", ColumnType::integer_type, 0, 1, true);
auto table_def = std::make_unique<Table>("result", result_tbl_col_defs);
Row new_row = table_def->create_empty_row();
new_row.setColumnValue(0, code);
new_row.setColumnValue(1, text);
new_row.setColumnValue(2, affected_rows);
table_def->add_row(new_row);
Row& new_row = table_def->create_empty_row();
new_row.setIntColumnValue(0, code);
new_row.setStringColumnValue(1, text.size() <= 48 ? text : text.substr(0,48));
new_row.setIntColumnValue(2, (long)affected_rows);
table_def->commit_row(new_row);
return std::move(table_def);
return table_def;
}
@@ -514,4 +684,5 @@ void USql::check_table_not_exists(const std::string &name) {
}
}
} // namespace
} // namespace