public boolean Fld_exists(String tbl, String fld) {
if (init) Init(engine);
Dbmeta_tbl_itm tbl_itm = tbl_mgr.Get_by(tbl);
return tbl_itm == null ? false : tbl_itm.Flds().Has(fld);
}
private void Init(Db_engine engine) {
init = false;
tbl_mgr.Clear();
idx_mgr.Clear();
Dbmeta_parser__tbl tbl_parser = new Dbmeta_parser__tbl();
Dbmeta_parser__idx idx_parser = new Dbmeta_parser__idx();
Db_qry__select_in_tbl qry =
Db_qry__select_in_tbl.new_(
"sqlite_master",
String_.Ary_empty,
String_.Ary("type", "name", "sql"),
Db_qry__select_in_tbl.Order_by_null);
Db_rdr rdr = engine.Stmt_by_qry(qry).Exec_select__rls_auto();
try {
Gfo_usr_dlg_.Instance.Log_many(
"", "", "db.schema.load.bgn: conn=~{0}", engine.Conn_info().Db_api());
while (rdr.Move_next()) {
String type_str = rdr.Read_str("type");
String name = rdr.Read_str("name");
String sql = rdr.Read_str("sql");
try {
int type_int = Dbmeta_itm_tid.Xto_int(type_str);
switch (type_int) {
case Dbmeta_itm_tid.Tid_table:
if (String_.Has_at_bgn(name, "sqlite_"))
continue; // ignore b/c of non-orthodox syntax; EX: "CREATE TABLE
// sqlite_sequence(name, seq)"; also "CREATE TABLE
// sqlite_stat(tbl,idx,stat)";
tbl_mgr.Add(tbl_parser.Parse(Bry_.new_u8(sql)));
break;
case Dbmeta_itm_tid.Tid_index:
if (sql == null)
continue; // ignore "autoindex"; EX: sqlite_autoindex_temp_page_len_avg_1
idx_mgr.Add(idx_parser.Parse(Bry_.new_u8(sql)));
break;
default:
Gfo_usr_dlg_.Instance.Log_many(
"",
"",
"db.schema.unknown type: conn=~{0} type=~{1} name=~{2} sql=~{3}",
engine.Conn_info().Db_api(),
type_str,
name,
sql);
break;
}
} catch (
Exception
e) { // tables / indexes may be unparseable; skip them; EX: CREATE TABLE unparseable
// (col_1 /*comment*/ int); DATE:2016-06-08
Gfo_usr_dlg_.Instance.Log_many(
"",
"",
"db.schema.unparseable: conn=~{0} type=~{1} name=~{2} sql=~{3} err=~{4}",
engine.Conn_info().Db_api(),
type_str,
name,
sql,
Err_.Message_gplx_log(e));
}
}
} finally {
rdr.Rls();
}
}
public boolean Tbl_exists(String name) {
if (init) Init(engine);
return tbl_mgr.Has(name);
}