755 lines
21 KiB
Plaintext
755 lines
21 KiB
Plaintext
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: myddas.yap *
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* Last rev: *
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* mods: *
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* comments: Global predicates for the MyDDAS Interface *
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* *
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*************************************************************************/
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%%:- load_foreign_files([myddas], [], init_myddas).
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/* Initialize MYDDAS GLOBAL STRUCTURES */
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:- c_db_initialize_myddas.
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#ifdef DEBUG
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:- yap_flag(single_var_warnings,on).
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#endif
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#define SWITCH(Contype, G) \
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( Contype == mysql -> \
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my_ ## G \
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; \
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Contype == sqlite3 -> \
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sqlite3_ ## G \
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; \
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Contype == postgres -> \
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postgres_ ## G \
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; \
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Contype == odbc -> \
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odbc_ ## G \
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)
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#define C_SWITCH(Contype, G) \
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( Contype == mysql -> \
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c_my_ ## G \
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; \
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Contype == sqlite3 -> \
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c_sqlite3_ ## G \
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; \
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Contype == postgres -> \
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c_postgres_ ## G \
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; \
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Contype == odbc -> \
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c_odbc_ ## G \
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)
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:- module(myddas,[
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db_open/5,
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db_open/4,
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db_open/2,
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db_open/1,
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db_open/0,
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db_close/1,
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db_close/0,
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db_verbose/1,
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db_module/1,
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db_is_database_predicate/3,
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#ifdef MYDDAS_STATS
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db_stats/1,
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db_stats/2,
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db_stats_time/2,
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#endif
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db_sql/2,
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db_sql/3,
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db_sql_select/3,
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db_prolog_select/2,
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db_prolog_select/3,
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db_prolog_select_multi/3,
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db_command/2,
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db_assert/2,
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db_assert/1,
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db_create_table/3,
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db_export_view/4,
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db_update/2,
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db_describe/2,
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db_describe/3,
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db_show_tables/2,
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db_show_tables/1,
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db_get_attributes_types/2,
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db_get_attributes_types/3,
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db_number_of_fields/2,
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db_number_of_fields/3,
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db_multi_queries_number/2
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% myddas_top_level.ypp
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#ifdef MYDDAS_TOP_LEVEL
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,
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db_top_level/4,
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db_top_level/5,
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db_datalog_select/3
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#endif
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% myddas_assert_predicates.ypp
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,
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db_import/2,
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db_import/3,
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db_view/2,
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db_view/3,
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db_insert/2,
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db_insert/3,
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db_abolish/2,
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db_listing/0,
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db_listing/1
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% myddas_mysql.ypp
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]).
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#ifdef MYDDAS_TOP_LEVEL
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:- use_module(myddas_top_level,[
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db_top_level/4,
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db_top_level/5,
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db_datalog_select/3
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]).
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#endif
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:- use_module(myddas_assert_predicates,[
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db_import/2,
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db_import/3,
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db_view/2,
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db_view/3,
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db_insert/2,
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db_insert/3,
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db_abolish/2,
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db_listing/0,
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db_listing/1
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]).
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:- use_module(myddas_sqlite3,[
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% myddas_mysql.ypp
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%c_sqlite3_connect/4,
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%c_sqlite3_disconnect/1,
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%c_sqlite3_query/5,
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sqlite3_result_set/1,
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%c_sqlite3_number_of_fields/3,
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%c_sqlite3_get_attributes_types/3,
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sqlite3_describe/3,
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sqlite3_show_tables/2,
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sqlite3_row/3
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]).
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:- use_module(myddas_util_predicates,[
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'$prolog2sql'/3,
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'$create_multi_query'/3,
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'$get_multi_results'/4,
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'$process_sql_goal'/4,
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'$process_fields'/3,
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'$get_values_for_insert'/3,
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'$make_atom'/2,
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'$write_or_not'/1,
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'$abolish_all'/1,
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'$make_a_list'/2,
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'$get_table_name'/2,
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'$get_values_for_update'/4,
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'$extract_args'/4,
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#ifdef MYDDAS_STATS
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'$make_stats_list'/2,
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#endif
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'$lenght'/2
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]).
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:- use_module(myddas_errors,[
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'$error_checks'/1
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]).
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:- use_module(myddas_prolog2sql,[
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translate/3,
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queries_atom/2
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]).
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:- use_module(library(lists),[
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append/3,
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member/2
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]).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_open/5
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% db_open/4
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%
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%% @pred db_open(+Interface,-Handle,+HostDb,+User,+Password)
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%% @pred db_open(+Interface,+HostDb,+User,+Password)
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%
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% Connect to a database-server, or open a file as a database, Paraameters are:
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%
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% _Interface_ : a supported server, it may be one of mysql, odbc, postgres, sqlite3.
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% _Handle_ : a name that refers to the database-conectionn. By default is `myddas`,
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% _Connection Info': either a sequence Host/Db/Port/Socket or a file name. You can use 0 for the defaukt port and sockets,
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% _UserId_; the use identifier, ignored by sqlite3;
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% _Password_ : access control, ignored by sqlite3,
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%
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%
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%
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db_open(Interface,HostDb,User,Password):-
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db_open(Interface,myddas,HostDb,User,Password).
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#ifdef MYDDAS_MYSQL
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db_open(mysql,Connection,Host/Db/Port/Socket,User,Password) :- !,
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'$error_checks'(db_open(mysql,Connection,Host/Db/Port/Socket,User,Password)),
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c_db_my_connect(Host,User,Password,Db,Port,Socket,Con),
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set_value(Connection,Con).
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db_open(mysql,Connection,Host/Db/Port,User,Password) :-
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integer(Port),!,
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db_open(mysql,Connection,Host/Db/Port/_,User,Password). % Var to be NULL, the default socket
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db_open(mysql,Connection,Host/Db/Socket,User,Password) :- !,
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db_open(mysql,Connection,Host/Db/0/Socket,User,Password). % 0 is default port
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db_open(mysql,Connection,Host/Db,User,Password) :-
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db_open(mysql,Connection,Host/Db/0/_,User,Password). % 0 is default port and Var to be NULL, the default socket
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#endif
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#ifdef MYDDAS_POSTGRES
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db_open(postgres,Connection,Host/Db/Port/Socket,User,Password) :- !,
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'$error_checks'(db_open(postgres,Connection,Host/Db/Port/Socket,User,Password)),
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c_db_my_connect(Host,User,Password,Db,Port,Socket,Con),
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set_value(Connection,Con).
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db_open(postgres,Connection,Host/Db/Port,User,Password) :-
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integer(Port),!,
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db_open(postgres,Connection,Host/Db/Port/_,User,Password). % Var to be NULL, the default socket
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db_open(postgres,Connection,Host/Db/Socket,User,Password) :- !,
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db_open(postgres,Connection,Host/Db/0/Socket,User,Password). % 0 is default port
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db_open(postgres,Connection,Host/Db,User,Password) :-
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db_open(postgres,Connection,Host/Db/0/_,User,Password). % 0 is default port and Var to be NULL, the default socpket
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#endif
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#ifdef MYDDAS_ODBC
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db_open(odbc,Connection,ODBCEntry,User,Password) :-
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'$error_checks'(db_open(odbc,Connection,ODBCEntry,User,Password)),
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c_odbc_connect(ODBCEntry,User,Password,Con),
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set_value(Connection,Con).
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#endif
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%% sqlite3
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db_open(sqlite3,Connection,File,User,Password) :-
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'$error_checks'(db_open(sqlite3,Connection,File,User,Password)),
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c_sqlite3_connect(File,User,Password,Con),
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set_value(Connection,Con).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%% db_close/1
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%% db_close/0
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%
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% close a connection _Con_: all its resources are returned, and all undefined
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% predicates are abolished. Default is to close `myddas`.
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db_close:-
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db_close(myddas).
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db_close(Protocol):-
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'$error_checks'(db_close(Protocol)),
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get_value(Protocol,Con),
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c_db_connection_type(Con,ConType),
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( '$abolish_all'(Con) ;
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set_value(Protocol,[]), % "deletes" atom
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C_SWITCH( ConType, disconnect(Con) )
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).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_verbose/1
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%
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%
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db_verbose(X):-
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var(X),!,
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get_value(db_verbose,X).
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db_verbose(N):-!,
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set_value(db_verbose,N).
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%default value
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:- set_value(db_verbose,0).
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:- set_value(db_verbose_filename,myddas_queries).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_module/1
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%
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%
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db_module(X):-
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var(X),!,
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get_value(db_module,X).
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db_module(ModuleName):-
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set_value(db_module,ModuleName).
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% default value
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:- db_module(user).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_is_database_predicate(+,+,+)
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%
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%
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db_is_database_predicate(Module,PredName,Arity):-
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'$error_checks'(db_is_database_predicate(PredName,Arity,Module)),
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c_db_check_if_exists_pred(PredName,Arity,Module).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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#ifdef MYDDAS_STATS
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_stats(+,-)
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%
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%
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db_stats(List):-
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db_stats(myddas,List).
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db_stats(Protocol,List):-
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'$error_checks'(db_stats(Protocol,List)),
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NumberOfStats = 10,
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'$make_a_list'(NumberOfStats,ListX1),
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( var(Protocol) ->
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c_db_stats(0,ListX1)
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;
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get_value(Protocol,Conn),
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c_db_stats(Conn,ListX1)
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),
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'$make_stats_list'(ListX1,List).
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#ifdef DEBUG
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_stats_time(+,-)
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% Reference is C pointer (memory reference)
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%
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db_stats_time(Reference,Time):-
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'$error_checks'(db_stats_time(Reference,Time)),
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c_db_stats_time(Reference,Time).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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#endif /* DEBUG */
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#endif /* MYDDAS_STATS */
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_sql(+,+,-)
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%
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%
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%compatibility
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db_sql_select(Protocol,SQL,LA):-
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db_sql(Protocol,SQL,LA).
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db_sql(SQL,LA):-
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db_sql(myddas,SQL,LA).
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db_sql(Connection,SQL,LA):-
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'$error_checks'(db_sql(Connection,SQL,LA)),
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get_value(Connection,Con),
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c_db_connection_type(Con,ConType),
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db_sql_(ConType, Con, SQL, LA).
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db_sql_(ConType, Con, SQL,LA):-
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'$write_or_not'(SQL),
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( ConType == mysql ->
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db_my_result_set(Mode),
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c_db_my_query(SQL,ResultSet,Con,Mode,Arity)
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;ConType == postgres ->
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postgres_result_set(Mode),
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c_postgres_query(SQL,ResultSet,Con,Mode,Arity)
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;ConType == sqlite3 ->
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sqlite3_result_set(Mode),
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myddas_myddas_sqlite3:c_sqlite3_query(SQL,ResultSet,Con,Mode,Arity)
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;
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c_odbc_query(SQL,ResultSet,Arity,LA,Con),
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c_odbc_number_of_fields_in_query(SQL,Con,Arity)
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),
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'$make_a_list'(Arity,LA),
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SWITCH( ConType, row(ResultSet,Arity,LA) ).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_prolog_select(+,+,+)
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%
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%
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db_prolog_select(LA,DbGoal):-
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db_prolog_select(myddas,LA,DbGoal).
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db_prolog_select(Connection,LA,DbGoal):-
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lenght(LA,Arity),
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Name=viewname,
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functor(ViewName,Name,Arity),
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% build arg list for viewname/Arity
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ViewName=..[Name|LA],
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'$prolog2sql'(ViewName,DbGoal,SQL),
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get_value(Connection,Con),
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c_db_connection_type(Con,ConType),
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db_sql_(ConType, Con, SQL,LA).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_prolog_select_multi(+,+,-)
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% db_prolog_select_multi(guest,[(ramos(A,C),A=C),(ramos(D,B),B=10)],[[A],[D,B]]).
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%
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db_prolog_select_multi(Connection,DbGoalsList,ListOfResults) :-
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'$error_checks'(db_prolog_select_multi(Connection,DbGoalsList,ListOfResults)),
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'$create_multi_query'(ListOfResults,DbGoalsList,SQL),
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get_value(Connection,Con),
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c_db_connection_type(Con,ConType),
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'$write_or_not'(SQL),
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C_SWITCH(ConType, query(SQL,ResultSet,Con,Mode,_) ),
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'$get_multi_results'(Con,ConType,ResultSet,ListOfResults).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_command/2
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%
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%
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db_command(Connection,SQL):-
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'$error_checks'(db_command(Connection,SQL)),
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get_value(Connection,Con),
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'$write_or_not'(SQL),
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c_db_connection_type(Con,ConType),
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( ConType == mysql ->
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db_my_result_set(Mode),
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c_db_my_query(SQL,_,Con,Mode,_)
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;
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true
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).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_assert/2
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% db_assert/1
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%
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db_assert(PredName):-
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db_assert(myddas,PredName).
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db_assert(Connection,PredName):-
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translate(PredName,PredName,Code),
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'$error_checks'(db_insert2(Connection,PredName,Code)),
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'$get_values_for_insert'(Code,ValuesList,RelName),
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'$make_atom'(['INSERT INTO `',RelName,'` VALUES '|ValuesList],SQL),
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get_value(Connection,Con),
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c_db_connection_type(Con,ConType),
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'$write_or_not'(SQL),
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( ConType == mysql ->
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db_my_result_set(Mode),
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c_db_my_query(SQL,_,Con,Mode,_)
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;ConType == postgres ->
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postgres_result_set(Mode),
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c_postgres_query(SQL,_,Con,Mode,_)
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;ConType == sqlite3 ->
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sqlite3_result_set(Mode),
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myddas_myddas_sqlite3:c_sqlite3_query(SQL,_,Con,Mode,_)
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;
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c_odbc_query(SQL,_,_,_,Con)
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).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_create_table/3
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% FieldsList = [field(Name,Type,Null,Key,DefaultValue)]
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% Example [field(campo1,'char(12)',y,y,a),field(campo2,int,y,y,0)]
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% TODO Test with ODBC & Type Checks
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db_create_table(Connection,TableName,FieldsInf):-
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'$error_checks'(db_create_table(Connection,TableName,FieldsInf)),
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get_value(Connection,Con),
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'$process_fields'(FieldsInf,FieldString,KeysSQL),
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'$make_atom'(['CREATE TABLE `',TableName,'` ( ',FieldString,KeysSQL,' )'],FinalSQL),
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c_db_connection_type(Con,ConType),
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'$write_or_not'(FinalSQL),
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( ConType == mysql ->
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db_my_result_set(Mode),
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c_db_my_query(FinalSQL,_,Con,Mode,_)
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;ConType == posgres ->
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postgres_result_set(Mode),
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c_postsgres_query(FinalSQL,_,Con,Mode,_)
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;ConType == sqlite3 ->
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sqlite3_result_set(Mode),
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myddas_myddas_sqlite3:c_sqlite3_query(FinalSQL,_,Con,Mode,_)
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;
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c_odbc_query(FinalSQL,_,_,_,Con)
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).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% db_export_view/4
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% TODO Test with ODBC
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%
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db_export_view(Connection,TableViewName,SQLorDbGoal,FieldsInf):-
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'$error_checks'(db_export_view(Connection,TableViewName,SQLorDbGoal,FieldsInf)),
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get_value(Connection,Con),
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'$process_sql_goal'(TableViewName,SQLorDbGoal,TableName,SQL),
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% Case there's some information about the
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% attribute fields of the relation given
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% by the user
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( FieldsInf == [] ->
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'$make_atom'(['CREATE TABLE ',TableName,' AS ',SQL],FinalSQL)
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;
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'$process_fields'(FieldsInf,FieldString,KeysSQL),
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'$make_atom'(['CREATE TABLE ',TableName,' (',FieldString,KeysSQL,') AS ',SQL],FinalSQL)
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||
),
|
||
|
||
c_db_connection_type(Con,ConType),
|
||
'$write_or_not'(FinalSQL),
|
||
( ConType == mysql ->
|
||
db_my_result_set(Mode),
|
||
c_db_my_query(FinalSQL,_,Con,Mode,_)
|
||
;
|
||
c_odbc_query(FinalSQL,_,_,_,Con)
|
||
).
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
|
||
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% db_update/2
|
||
% BUG: db_update dosen't work for this case, just an example
|
||
% db_update(my1,edge(1,3)-edge(99,99)).
|
||
% The case where the set condition is "set" to change all the fields
|
||
db_update(Connection,WherePred-SetPred):-
|
||
%TODO: error_checks
|
||
get_value(Connection,Conn),
|
||
|
||
% Match and Values must be "unifiable"
|
||
functor(WherePred,PredName,Arity),
|
||
functor(SetPred,PredName,Arity),
|
||
|
||
functor(NewRelation,PredName,Arity),
|
||
|
||
'$extract_args'(WherePred,1,Arity,WhereArgs),
|
||
'$extract_args'(SetPred,1,Arity,SetArgs),
|
||
|
||
copy_term(WhereArgs,WhereArgsTemp),
|
||
NewRelation=..[PredName|WhereArgsTemp],
|
||
translate(NewRelation,NewRelation,Code),
|
||
|
||
'$get_values_for_update'(Code,SetArgs,SetCondition,WhereCondition),
|
||
|
||
'$get_table_name'(Code,TableName),
|
||
append(SetCondition,WhereCondition,Conditions),
|
||
'$make_atom'(['UPDATE `',TableName,'` '|Conditions],SQL),
|
||
'$write_or_not'(SQL),
|
||
get_value(Connection,Con),
|
||
c_db_connection_type(Con,ConType),
|
||
( ConType == mysql ->
|
||
db_my_result_set(Mode),
|
||
c_db_my_query(SQL,_,Conn,Mode,_)
|
||
;
|
||
ConType == mysql ->
|
||
postgres_result_set(Mode),
|
||
c_postgres_query(SQL,_,Conn,Mode,_)
|
||
;
|
||
ConType == sqlite3 ->
|
||
sqlite3_result_set(Mode),
|
||
myddas_sqlite3:c_sqlite3_query(SQL,_,Conn,Mode,_)
|
||
;
|
||
ConType == odbc ->
|
||
odbc_result_set(Mode),
|
||
c_odbc_query(SQL,_,Conn,Mode,_)
|
||
).
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
/**
|
||
*
|
||
@pred db_get_attributes_types(+Conn,+RelationName,-ListOfFields)
|
||
@pred db_get_attributes_types(RelationName,ListOfFields)
|
||
Y
|
||
ou can use the predicate db_get_attributes_types/2 or db_get_attributes_types/3, to know what
|
||
are the names and attributes types of the fields of a given relation. For example:
|
||
|
||
~~~~
|
||
?- db_get_attributes_types(myddas,’Hello World’,LA).
|
||
LA = [’Number’,integer,’Name’,string,’Letter’,string] ?
|
||
yes
|
||
˜˜˜˜
|
||
where `Hello World` is the name of the relation and `myddas` is the connection identifier.
|
||
*/
|
||
db_get_attributes_types(RelationName,TypesList) :-
|
||
db_get_attributes_types(myddas,RelationName,TypesList).
|
||
db_get_attributes_types(Connection,RelationName,TypesList) :-
|
||
'$error_checks'(db_get_attributes_types(Connection,RelationName,TypesList)),
|
||
get_value(Connection,Con),
|
||
c_db_connection_type(Con,ConType),
|
||
C_SWITCH(ConType, get_attributes_types(RelationName,Con,TypesList) ).
|
||
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
|
||
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
|
||
/**
|
||
|
||
@pred db_number_of_fields(+Conn,+RelationName,-Arity).
|
||
@pred db_number_of_fields(+RelationName,-Arity).
|
||
|
||
You can use the predicate db number of fields/2 or db number of fields/3, to know what is the arity
|
||
of a given relation.
|
||
|
||
@Example
|
||
~~~~
|
||
?- db_number_of_fields(myddas,’Hello World’,Arity).
|
||
Arity = 3 ?
|
||
yes
|
||
˜˜˜˜
|
||
where `Hello World` is the name of the relation and `myddas` is the connection identifier.
|
||
*/
|
||
%
|
||
db_number_of_fields(RelationName,Arity) :-
|
||
db_number_of_fields(myddas,RelationName,Arity).
|
||
db_number_of_fields(Connection,RelationName,Arity) :-
|
||
'$error_checks'(db_number_of_fields(Connection,RelationName,Arity)),
|
||
get_value(Connection,Con),
|
||
c_db_connection_type(Con,ConType),
|
||
C_SWITCH(ConType, number_of_fields(RelationName,Con,Arity) ).
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
|
||
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% db_multi_queries_number(+,+)
|
||
% TODO: EVERITHING
|
||
%
|
||
db_multi_queries_number(Connection,Number) :-
|
||
'$error_checks'(db_multi_queries_number(Connection,Number)),
|
||
get_value(Connection,Con),
|
||
c_db_multi_queries_number(Con,Number).
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
|
||
|
||
|
||
db_result_set(X) :-
|
||
'$error_checks'(db_result_set(X) ),
|
||
get_value(myddas,Con),
|
||
c_db_connection_type(Con,DBMS),
|
||
DBMS:result_set(X).
|
||
|
||
db_datalog_describe(X) :-
|
||
'$error_checks'(db_datalog_describe(X) ),
|
||
get_value(myddas,Con),
|
||
c_db_connection_type(Con,DBMS),
|
||
DBMS:datalog_describe(X).
|
||
|
||
db_datalog_describe(Connection,Y) :-
|
||
'$error_checks'(db_datalog_describe(Connection,Y) ),
|
||
get_value(Connection,Con),
|
||
c_db_connection_type(Con,DBMS),
|
||
DBMS:datalog_describe(Connection,Y).
|
||
|
||
/**
|
||
@pred db_describe(+,+,?)
|
||
@pred db_describe(+,?)
|
||
|
||
The db describe/3 predicate does the same action as db_datalog_describe/2 predicate but with one
|
||
major difference. The results are returned by backtracking. For example, the last query done:
|
||
|
||
~~~~
|
||
?- db_describe(myddas,’Hello World’,Term).
|
||
Term = tableInfo(’Number’,int(11),’YES’,’’,null(0),’’) ? ;
|
||
Term = tableInfo(’Name’,char(10),’YES’,’’,null(1),’’) ? ;
|
||
Term = tableInfo(’Letter’,char(1),’YES’,’’,null(2),’’) ? ;
|
||
no
|
||
~~~~
|
||
*/
|
||
db_describe(Y,Z) :-
|
||
db_describe(myddas,Y,Z).
|
||
db_describe(Connection,Y,Z) :-
|
||
'$error_checks'(db_describe(Connection,Y,Z) ),
|
||
get_value(Connection,Con),
|
||
c_db_connection_type(Con,ConType),
|
||
SWITCH(ConType, describe(Connection,Y,Z) ).
|
||
|
||
|
||
db_datalog_show_tables :-
|
||
db_datalog_show_tables(myddas).
|
||
db_datalog_show_tables(Connection) :-
|
||
'$error_checks'(db_datalog_show_tables(Connection) ),
|
||
get_value(Connection,Con),
|
||
c_db_connection_type(Con,DBMS),
|
||
switch( DBMS, datalog_show_tables(Connection) ).
|
||
|
||
db_datalog_show_tables :-
|
||
'$error_checks'(db_datalog_show_tables),
|
||
get_value(myddas,Con),
|
||
c_db_connection_type(Con,DBMS),
|
||
DBMS:datalog_show_tables.
|
||
|
||
/**
|
||
@pred db_show_tables(+,?).
|
||
@pred db_show_tables(?).
|
||
|
||
The db show tables/2 predicate does the same action as db show tables/1 predicate but with one
|
||
major difference. The results are returned by backtracking.
|
||
|
||
For example, the last query done:
|
||
~~~~`
|
||
`?- db_show_tables(myddas,Table).
|
||
Table = table(’Hello World’) ? ;
|
||
~~~~
|
||
``*/
|
||
db_show_tables(Y) :-
|
||
db_show_tables(myddas,Y).
|
||
db_show_tables(Connection,Y) :-
|
||
'$error_checks'(db_show_tables(Connection,Y) ),
|
||
get_value(Connection,Con),
|
||
c_db_connection_type(Con,ConType),
|
||
SWITCH( ConType, show_tables(Connection,Y) ).
|
||
|
||
db_show_database(Connection,Y) :-
|
||
'$error_checks'(db_show_database(Connection,Y) ),
|
||
get_value(Connection,Con),
|
||
c_db_connection_type(Con,DBMS),
|
||
DBMS:show_database(Connection,Y).
|
||
|
||
db_show_databases(Connection,Y) :-
|
||
'$error_checks'(db_show_databases(Connection,Y) ),
|
||
get_value(Connection,Con),
|
||
c_db_connection_type(Con,DBMS),
|
||
DBMS:show_databases(Connection,Y).
|
||
|
||
db_show_databases(X) :-
|
||
'$error_checks'(db_show_databases(X) ),
|
||
get_value(myddas,Con),
|
||
c_db_connection_type(Con,DBMS),
|
||
DBMS:show_databases(X).
|
||
|
||
db_change_database(Connection,Y) :-
|
||
'$error_checks'(db_change_database(Connection,Y) ),
|
||
get_value(Connection,Con),
|
||
c_db_connection_type(Con,DBMS),
|
||
DBMS:change_database(Connection,Y).
|
||
|
||
db_call_procedure(Connection,Y,Z,W) :-
|
||
'$error_checks'(db_call_procedure(Connection,Y,Z,W) ),
|
||
get_value(Connection,Con),
|
||
c_db_connection_type(Con,DBMS),
|
||
DBMS:call_procedure(Connection,Y,Z,W).
|
||
|
||
db_call_procedure(X,Y,Z) :-
|
||
'$error_checks'(db_call_procedure(X,Y,Z) ),
|
||
get_value(myddas,Con),
|
||
c_db_connection_type(Con,DBMS),
|
||
DBMS:call_procedure(X,Y,Z).
|