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indexes WIP

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VaclavT
2021-11-17 15:35:57 +01:00
parent cc639ee891
commit 411f0fd48c
25 changed files with 609 additions and 807 deletions
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23
usql_ddl.cpp
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@@ -1,6 +1,5 @@
#include "usql.h"
#include "exception.h"
#include "ml_date.h"
#include "ml_string.h"
#include <algorithm>
@@ -20,6 +19,28 @@ std::unique_ptr<Table> USql::execute_create_table(CreateTableNode &node) {
}
std::unique_ptr<Table> USql::execute_create_index(CreateIndexNode &node) {
Table *table_def = find_table(node.table_name); // throws exception if not found
ColDefNode col_def = table_def->get_column_def(node.column_name); // throws exception if not found
if (table_def->get_index(node.index_name) != nullptr) throw Exception("index already exists");
if (col_def.null) throw Exception("index on not null supported only");
if (table_def->get_index_for_column(node.column_name) != nullptr) throw Exception("column is already indexed");
IndexedDataType type;
if (col_def.type == ColumnType::integer_type) type = IndexedDataType::integer;
else if (col_def.type == ColumnType::varchar_type) type = IndexedDataType::string;
else throw Exception("creating index on unsupported type");
Index<IndexValue> i{node.index_name, node.column_name, type};
table_def->create_index(i);
table_def->index_rows(node.index_name);
return create_stmt_result_table(0, "index created", 0);
}
std::unique_ptr<Table> USql::execute_create_table_as_table(CreateTableAsSelectNode &node) {
check_table_not_exists(node.table_name);