Question

使用Yap Prolog 6.2.0和MySQL 5.1.41，并尝试使用db_open http://www.dcc.fc.up.pt/~vsc/Yap/documentation.html#MYDDAS

Prolog来源：

:- use_module(library(myddas)). 

:- trace, db_open(mysql, x, localhost/myschema, web, mypassword),
   write('got it'), nl.

失败的痕迹：

?- db_open(mysql,x,localhost/myschema,web,mypassword).
(1)    call:db_open(mysql,x,localhost/myschema,web,mypassword) ? 
(2)    call:myddas:db_open(mysql,x,localhost/myschema/0/_131406,web,mypassword) ? 
(3)    call:myddas_errors:'$error_checks'(db_open(mysql,x,localhost/myschema/0/_131406,web,mypassword)) ? 
(3)    exit:myddas_errors:'$error_checks'(db_open(mysql,x,localhost/myschema/0/_131406,web,mypassword)) ? 
(4)    call:myddas:c_db_my_connect(localhost,web,mypassword,myschema,0,_131406,_131634) ? 
(4)    fail:myddas:c_db_my_connect(localhost,web,mypassword,myschema,0,_131406,_131634) ? 
(2)    fail:myddas:db_open(mysql,x,localhost/myschema/0/_131406,web,mypassword) ? 
(1)    fail:db_open(mysql,x,localhost/myschema,web,mypassword) ?

Answer 1

似乎需要使用--enable-myddas --enable-myddas-stats --enable-myddas-top-level编译Yap 使用--enable-myddas --enable-myddas-top-level进行编译（我之前认为）与{{1}}无关。

为什么Yap的MYDDAS（MySQL耦合API）无效？

1 个答案: