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yap-6.3/packages/myddas/pl/myddas.ypp
Vitor Santos Costa 29c004d62a android
2019-01-09 13:59:58 +00:00

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/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: myddas.yap *
* Last rev: *
* mods: *
* comments: Global predicates for the MyDDAS Interface *
* *
*************************************************************************/
#ifdef DEBUG
:- yap_flag(single_var_warnings,on).
:- yap_flag(write_strings,on).
#endif
#define SWITCH(Contype, G) \
( Contype == mysql -> \
my_ ## G \
; \
Contype == sqlite3 -> \
sqlite3_ ## G \
; \
Contype == postgres -> \
postgres_ ## G \
; \
Contype == odbc -> \
odbc_ ## G \
)
#define C_SWITCH(Contype, G) \
( Contype == mysql -> \
c_my_ ## G \
; \
Contype == sqlite3 -> \
c_sqlite3_ ## G \
; \
Contype == postgres -> \
c_postgres_ ## G \
; \
Contype == odbc -> \
c_odbc_ ## G \
)
:- module(myddas,[
db_open/5,
db_open/4,
db_open/2,
db_open/1,
db_open/0,
db_close/1,
db_close/0,
db_verbose/1,
db_module/1,
db_is_database_predicate/3,
#ifdef MYDDAS_STATS
db_stats/1,
db_stats/2,
db_stats_time/2,
#endif
db_sql/2,
db_sql/3,
db_sql_select/3,
db_prolog_select/2,
db_prolog_select/3,
db_prolog_select_multi/3,
db_command/2,
db_assert/2,
db_assert/1,
db_create_table/3,
db_export_view/4,
db_update/2,
db_describe/2,
db_describe/3,
db_show_tables/2,
db_show_tables/1,
db_get_attributes_types/2,
db_get_attributes_types/3,
db_number_of_fields/2,
db_number_of_fields/3,
db_multi_queries_number/2
% myddas_top_level.ypp
#ifdef MYDDAS_TOP_LEVEL
,
db_top_level/4,
db_top_level/5,
db_datalog_select/3
#endif
% myddas_assert_predicates.ypp
,
db_import/2,
db_import/3,
db_view/2,
db_view/3,
db_insert/2,
db_insert/3,
db_abolish/2,
db_listing/0,
db_listing/1
% myddas_mysql.ypp
]).
:- load_foreign_files([myddas], [], init_myddas).
/* Initialize MYDDAS GLOBAL STRUCTURES */
:- c_db_initialize_myddas.
#ifdef MYDDAS_TOP_LEVEL
:- use_module(myddas_top_level,[
db_top_level/4,
db_top_level/5,
db_datalog_select/3
]).
#endif
:- use_module(myddas_assert_predicates,[
db_import/2,
db_import/3,
db_view/2,
db_view/3,
db_insert/2,
db_insert/3,
db_abolish/2,
db_listing/0,
db_listing/1
]).
:- meta_predicate db_import(+,+,:), db_import(+,:).
:- use_module(myddas_sqlite3,[
% myddas_mysql.ypp
%c_sqlite3_connect/4,
%c_sqlite3_disconnect/1,
%c_sqlite3_query/5,
sqlite3_result_set/1,
%c_sqlite3_number_of_fields/3,
%c_sqlite3_get_attributes_types/3,
sqlite3_describe/3,
sqlite3_show_tables/2,
sqlite3_row/3
]).
:- use_module(myddas_util_predicates,[
'$prolog2sql'/3,
'$create_multi_query'/3,
'$get_multi_results'/4,
'$process_sql_goal'/4,
'$process_fields'/3,
'$get_values_for_insert'/3,
'$make_atom'/2,
'$write_or_not'/1,
'$abolish_all'/1,
'$make_a_list'/2,
'$get_table_name'/2,
'$get_values_for_update'/4,
'$extract_args'/4,
#ifdef MYDDAS_STATS
'$make_stats_list'/2,
#endif
'$lenght'/2
]).
:- use_module(myddas_errors,[
'$error_checks'/1
]).
:- use_module(myddas_prolog2sql,[
translate/3,
queries_atom/2
]).
:- use_module(library(lists),[
append/3,
member/2
]).
:- set_prolog_flag(verbose,silent).
:- multifile user:file_search_path/2.
:- dynamic user:file_search_path/2.
user:file_search_path(dataset, C) :-
library_directory(Dir),
( current_prolog_flag(windows, true)
-> atomic_list_concat([Dir,data], ;, C)
;
atomic_list_concat([Dir,data], :, C)
).
user:file_search_path(dataset, '.').
:- multifile user:prolog_file_type/2.
:- dynamic user:prolog_file_type/2.
user:prolog_file_type( db, dataset ).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_open/5
% db_open/4
%
%% @pred db_open(+Interface,-Handle,+HostDb,+User,+Password)
%% @pred db_open(+Interface,+HostDb,+User,+Password)
%
% Connect to a database-server, or open a file as a database, Parameters are:
%
% _Interface_ : a supported server, it may be one of mysql, odbc, postgres, sqlite3.
% _Handle_ : a name that refers to the database-conectionn. By default is `myddas`,
% _Connection Info': either a sequence Host/Db/Port/Socket or a file name. You can use 0 for the defaukt port and sockets,
% _UserId_; the use identifier, ignored by sqlite3;
% _Password_ : access control, ignored by sqlite3,
%
%
%
db_open(Interface,HostDb,User,Password):-
db_open(Interface,myddas,HostDb,User,Password).
#ifdef MYDDAS_MYSQL
db_open(mysql,Connection,Host/Db/Port/Socket,User,Password) :- !,
'$error_checks'(db_open(mysql,Connection,Host/Db/Port/Socket,User,Password)),
c_db_my_connect(Host,User,Password,Db,Port,Socket,Con),
set_value(Connection,Con).
db_open(mysql,Connection,Host/Db/Port,User,Password) :-
integer(Port),!,
db_open(mysql,Connection,Host/Db/Port/_,User,Password). % Var to be NULL, the default socket
db_open(mysql,Connection,Host/Db/Socket,User,Password) :- !,
db_open(mysql,Connection,Host/Db/0/Socket,User,Password). % 0 is default port
db_open(mysql,Connection,Host/Db,User,Password) :-
db_open(mysql,Connection,Host/Db/0/_,User,Password). % 0 is default port and Var to be NULL, the default socket
#endif
#ifdef MYDDAS_POSTGRES
db_open(postgres,Connection,Host/Db/Port/Socket,User,Password) :- !,
'$error_checks'(db_open(postgres,Connection,Host/Db/Port/Socket,User,Password)),
c_db_my_connect(Host,User,Password,Db,Port,Socket,Con),
set_value(Connection,Con).
db_open(postgres,Connection,Host/Db/Port,User,Password) :-
integer(Port),!,
db_open(postgres,Connection,Host/Db/Port/_,User,Password). % Var to be NULL, the default socket
db_open(postgres,Connection,Host/Db/Socket,User,Password) :- !,
db_open(postgres,Connection,Host/Db/0/Socket,User,Password). % 0 is default port
db_open(postgres,Connection,Host/Db,User,Password) :-
db_open(postgres,Connection,Host/Db/0/_,User,Password). % 0 is default port and Var to be NULL, the default socpket
#endif
#ifdef MYDDAS_ODBC
db_open(odbc,Connection,ODBCEntry,User,Password) :-
'$error_checks'(db_open(odbc,Connection,ODBCEntry,User,Password)),
c_odbc_connect(ODBCEntry,User,Password,Con),
set_value(Connection,Con).
#endif
%% sqlite3
db_open(sqlite3,Connection,File,User,Password) :-
absolute_file_name(File,Db,[access(write),file_type(myddas),expand(true)]),
'$error_checks'(db_open(sqlite3,Connection,Db,User,Password)),
c_sqlite3_connect(Db,User,Password,Con),
set_value(Connection,Con).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% db_close/1
%% db_close/0
%
% close a connection _Con_: all its resources are returned, and all undefined
% predicates are abolished. Default is to close `myddas`.
db_close:-
db_close(myddas).
db_close(Protocol):-
'$error_checks'(db_close(Protocol)),
get_value(Protocol,Con),
c_db_connection_type(Con,ConType),
( '$abolish_all'(Con) ;
set_value(Protocol,[]), % "deletes" atom
C_SWITCH( ConType, disconnect(Con) )
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_verbose/1
%
%
db_verbose(X):-
var(X),!,
get_value(db_verbose,X).
db_verbose(N):-!,
set_value(db_verbose,N).
%default value
:- set_value(db_verbose,0).
:- set_value(db_verbose_filename,myddas_queries).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_module/1
%
%
db_module(X):-
var(X),!,
get_value(db_module,X).
db_module(ModuleName):-
set_value(db_module,ModuleName).
% default value
:- db_module(user).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_is_database_predicate(+,+,+)
%
%
db_is_database_predicate(Module,PredName,Arity):-
'$error_checks'(db_is_database_predicate(PredName,Arity,Module)),
c_db_check_if_exists_pred(PredName,Arity,Module).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
#ifdef MYDDAS_STATS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_stats(+,-)
%
%
db_stats(List):-
db_stats(myddas,List).
db_stats(Protocol,List):-
'$error_checks'(db_stats(Protocol,List)),
NumberOfStats = 10,
'$make_a_list'(NumberOfStats,ListX1),
( var(Protocol) ->
c_db_stats(0,ListX1)
;
get_value(Protocol,Conn),
c_db_stats(Conn,ListX1)
),
'$make_stats_list'(ListX1,List).
#ifdef DEBUG
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_stats_time(+,-)
% Reference is C pointer (memory reference)
%
db_stats_time(Reference,Time):-
'$error_checks'(db_stats_time(Reference,Time)),
c_db_stats_time(Reference,Time).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
#endif /* DEBUG */
#endif /* MYDDAS_STATS */
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_sql(+,+,-)
%
%
%compatibility
db_sql_select(Protocol,SQL,LA):-
db_sql(Protocol,SQL,LA).
db_sql(SQL,LA):-
db_sql(myddas,SQL,LA).
db_sql(Connection,SQL,LA):-
'$error_checks'(db_sql(Connection,SQL,LA)),
get_value(Connection,Con),
c_db_connection_type(Con,ConType),
db_sql_(ConType, Con, SQL, LA).
db_sql_(ConType, Con, SQL,LA):-
'$write_or_not'(SQL),
( ConType == mysql ->
db_my_result_set(Mode),
c_db_my_query(SQL,ResultSet,Con,Mode,Arity)
;ConType == postgres ->
postgres_result_set(Mode),
c_postgres_query(SQL,ResultSet,Con,Mode,Arity)
;ConType == sqlite3 ->
sqlite3_result_set(Mode),
myddas_myddas_sqlite3:c_sqlite3_query(SQL,ResultSet,Con,Mode,Arity)
;
c_odbc_query(SQL,ResultSet,Arity,LA,Con),
c_odbc_number_of_fields_in_query(SQL,Con,Arity)
),
'$make_a_list'(Arity,LA),
SWITCH( ConType, row(ResultSet,Arity,LA) ).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_prolog_select(+,+,+)
%
%
db_prolog_select(LA,DbGoal):-
db_prolog_select(myddas,LA,DbGoal).
db_prolog_select(Connection,LA,DbGoal):-
lenght(LA,Arity),
Name=viewname,
functor(ViewName,Name,Arity),
% build arg list for viewname/Arity
ViewName=..[Name|LA],
'$prolog2sql'(ViewName,DbGoal,SQL),
get_value(Connection,Con),
c_db_connection_type(Con,ConType),
db_sql_(ConType, Con, SQL,LA).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_prolog_select_multi(+,+,-)
% db_prolog_select_multi(guest,[(ramos(A,C),A=C),(ramos(D,B),B=10)],[[A],[D,B]]).
%
db_prolog_select_multi(Connection,DbGoalsList,ListOfResults) :-
'$error_checks'(db_prolog_select_multi(Connection,DbGoalsList,ListOfResults)),
'$create_multi_query'(ListOfResults,DbGoalsList,SQL),
get_value(Connection,Con),
c_db_connection_type(Con,ConType),
'$write_or_not'(SQL),
C_SWITCH(ConType, query(SQL,ResultSet,Con,Mode,_) ),
'$get_multi_results'(Con,ConType,ResultSet,ListOfResults).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_command/2
%
%
db_command(Connection,SQL):-
'$error_checks'(db_command(Connection,SQL)),
get_value(Connection,Con),
'$write_or_not'(SQL),
c_db_connection_type(Con,ConType),
( ConType == mysql ->
db_my_result_set(Mode),
c_db_my_query(SQL,_,Con,Mode,_)
;
true
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_assert/2
% db_assert/1
%
db_assert(PredName):-
db_assert(myddas,PredName).
db_assert(Connection,PredName):-
translate(PredName,PredName,Code),
'$error_checks'(db_insert2(Connection,PredName,Code)),
'$get_values_for_insert'(Code,ValuesList,RelName),
'$make_atom'(['INSERT INTO `',RelName,'` VALUES '|ValuesList],SQL),
get_value(Connection,Con),
c_db_connection_type(Con,ConType),
'$write_or_not'(SQL),
( ConType == mysql ->
db_my_result_set(Mode),
c_db_my_query(SQL,_,Con,Mode,_)
;ConType == postgres ->
postgres_result_set(Mode),
c_postgres_query(SQL,_,Con,Mode,_)
;ConType == sqlite3 ->
sqlite3_result_set(Mode),
myddas_myddas_sqlite3:c_sqlite3_query(SQL,_,Con,Mode,_)
;
c_odbc_query(SQL,_,_,_,Con)
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_create_table/3
% FieldsList = [field(Name,Type,Null,Key,DefaultValue)]
% Example [field(campo1,'char(12)',y,y,a),field(campo2,int,y,y,0)]
% TODO Test with ODBC & Type Checks
db_create_table(Connection,TableName,FieldsInf):-
'$error_checks'(db_create_table(Connection,TableName,FieldsInf)),
get_value(Connection,Con),
'$process_fields'(FieldsInf,FieldString,KeysSQL),
'$make_atom'(['CREATE TABLE `',TableName,'` ( ',FieldString,KeysSQL,' )'],FinalSQL),
c_db_connection_type(Con,ConType),
'$write_or_not'(FinalSQL),
( ConType == mysql ->
db_my_result_set(Mode),
c_db_my_query(FinalSQL,_,Con,Mode,_)
;ConType == posgres ->
postgres_result_set(Mode),
c_postsgres_query(FinalSQL,_,Con,Mode,_)
;ConType == sqlite3 ->
sqlite3_result_set(Mode),
myddas_myddas_sqlite3:c_sqlite3_query(FinalSQL,_,Con,Mode,_)
;
c_odbc_query(FinalSQL,_,_,_,Con)
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% db_export_view/4
% TODO Test with ODBC
%
db_export_view(Connection,TableViewName,SQLorDbGoal,FieldsInf):-
'$error_checks'(db_export_view(Connection,TableViewName,SQLorDbGoal,FieldsInf)),
get_value(Connection,Con),
'$process_sql_goal'(TableViewName,SQLorDbGoal,TableName,SQL),
% Case there's some information about the
% attribute fields of the relation given
% by the user
( FieldsInf == [] ->
'$make_atom'(['CREATE TABLE ',TableName,' AS ',SQL],FinalSQL)
;
'$process_fields'(FieldsInf,FieldString,KeysSQL),
'$make_atom'(['CREATE TABLE ',TableName,' (',FieldString,KeysSQL,') AS ',SQL],FinalSQL)
),
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_show_tables :-
'$error_checks'(db_datalog_show_tables),
get_value(myddas,Con),
c_db_connection_type(Con,DBMS),
DBMS:datalog_show_tables.
db_datalog_show_tables(Connection) :-
'$error_checks'(db_datalog_show_tables(Connection) ),
get_value(Connection,Con),
c_db_connection_type(Con,DBMS),
switch( DBMS, datalog_show_tables(Connection) ).
/**
@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).