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Implemented table version support for SQLite3DatabaseConnection.

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Relintai 2025-05-12 08:39:06 +02:00
parent 882d1903a4
commit e69fcf5656
3 changed files with 104 additions and 13 deletions
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5
modules/database/database_connection.cpp
View File

@ -73,16 +73,11 @@ Ref<Database> DatabaseConnection::get_owner() {
int DatabaseConnection::get_table_version(const String &table) {
ensure_version_table_exists();
//get_query_builder()
//TODO
return 0;
}
void DatabaseConnection::set_table_version(const String &table, const int version) {
//TODO
}
void DatabaseConnection::ensure_version_table_exists() {
//TODO
}
void DatabaseConnection::set_owner(Database *owner) {

92
modules/database_sqlite/sqlite3_connection.cpp
View File

@ -106,6 +106,98 @@ void SQLite3DatabaseConnection::escape_to(const String &str, String *to) {
}
}
int SQLite3DatabaseConnection::get_table_version(const String &table) {
ensure_version_table_exists();
Ref<QueryBuilder> qb = get_query_builder();
qb->select("version");
qb->from("table_versions");
qb->where();
qb->wps("table_name", table);
qb->end_command();
Ref<QueryResult> res = qb->run();
if (!res->next_row()) {
return 0;
}
return res->get_next_cell_int();
}
void SQLite3DatabaseConnection::set_table_version(const String &table, const int version) {
ensure_version_table_exists();
Ref<QueryBuilder> qb = get_query_builder();
qb->select("id");
qb->from("table_versions");
qb->where();
qb->wps("table_name", table);
qb->end_command();
Ref<QueryResult> res = qb->run();
qb->reset();
if (!res->next_row()) {
if (version == -1) {
return;
}
qb->insert("table_versions", "table_name,version");
qb->values();
qb->vals(table);
qb->vali(version);
qb->cvalues();
qb->end_command();
qb->run_query();
} else {
int id = res->get_next_cell_int();
if (version != -1) {
qb->update("table_versions");
qb->sets();
qb->setpi("version", version);
qb->cset();
qb->where()->wpi("id", id);
qb->run_query();
} else {
qb->del("table_versions");
qb->where()->wpi("id", id);
qb->run_query();
}
}
}
void SQLite3DatabaseConnection::ensure_version_table_exists() {
// https://www.sqlite.org/fileformat2.html#storage_of_the_sql_database_schema
Ref<QueryBuilder> qb = get_query_builder();
qb->select("count(*)");
qb->from("sqlite_master");
qb->where();
qb->wps("type", "table");
qb->land();
qb->wps("name", "table_versions");
qb->end_command();
Ref<QueryResult> res = qb->run();
ERR_FAIL_COND(!res->next_row());
int c = res->get_next_cell_int();
if (c == 0) {
Ref<TableBuilder> tb = get_table_builder();
tb->create_table("table_versions");
tb->integer("id")->auto_increment()->next_row();
tb->varchar("table_name", 256)->not_null()->next_row();
tb->integer("version")->next_row();
tb->primary_key("id");
tb->ccreate_table();
tb->run_query();
// tb->print();
}
}
SQLite3DatabaseConnection::SQLite3DatabaseConnection() {
conn = nullptr;
}

20
modules/database_sqlite/sqlite3_connection.h
View File

@ -15,16 +15,20 @@ class SQLite3DatabaseConnection : public DatabaseConnection {
public:
friend class SQLite3PreparedStatement;
Error database_connect(const String &connection_str);
Ref<QueryResult> query(const String &query);
void query_run(const String &query);
virtual Error database_connect(const String &connection_str);
virtual Ref<QueryResult> query(const String &query);
virtual void query_run(const String &query);
Ref<QueryBuilder> get_query_builder();
Ref<TableBuilder> get_table_builder();
Ref<PreparedStatement> create_prepared_statement();
virtual Ref<QueryBuilder> get_query_builder();
virtual Ref<TableBuilder> get_table_builder();
virtual Ref<PreparedStatement> create_prepared_statement();
String escape(const String &str);
void escape_to(const String &str, String *to);
virtual String escape(const String &str);
virtual void escape_to(const String &str, String *to);
virtual int get_table_version(const String &table);
virtual void set_table_version(const String &table, const int version);
virtual void ensure_version_table_exists();
SQLite3DatabaseConnection();
~SQLite3DatabaseConnection();