在this previous question之后:在PostgreSQL源代码中,src/backend/tcop中有一个名为postgres.c的文件。里面有一个名为exec_simple_query()的函数。我想添加一行调用start_create_profile()的代码行,该代码行位于与postgres.c相同的文件夹中的另一个名为test.c的文件中。
我正在linux上使用eclipse (kubuntu/ubuntu)。我按照本教程创建了环境http://wiki.postgresql.org/wiki/Working_with_Eclipse
这是test.c:
#include "postgres.h"
#ifndef PROGPROFILE_H_
#define PROGPROFILE_H_
/* interfaces */
extern void start_create_profile(List *querytree_list);
extern void create_profile();
extern void check_anomaly(List *querytree_list);
#endif /* Test ProgProf */
void start_create_profile(List *querytree_list){
ListCell *l;
ListCell *tl;
FILE *f;
//if the file exist just open and write
//else create and write
f = fopen ("QueryParsed.txt", "a+");
Query *query_idr = (Query *)linitial(querytree_list);
// CMD_SELECT=0 CMD_INSERT=1 CMD_UPDATE=2
switch (query_idr->commandType)
{
case CMD_SELECT:
fputs("CMD_SELECT, ", f);
break;
case CMD_INSERT:
fputs("CMD_INSERT, ", f);
break;
case CMD_UPDATE:
fputs("CMD_UPDATE, ", f);
break;
default:
break;
}
//to have the ID of the table
foreach(l, query_idr->rtable){
Oid tab_idT = ((RangeTblEntry *) lfirst(l)) ->relid;
//char temp1[10];
char *tab_idTConverted = itoa(tab_idT);
/* This is not a table */
if (tab_idT == 0)
continue;
fputs(" tab_id: , ", f);
fputs(tab_idTConverted, f);
}
//to have the name of the targer list
foreach(tl, query_idr->targetList){
TargetEntry *tle = (TargetEntry *) lfirst(tl);
Oid tab_id = tle->resorigtbl;
int tab_idCast=(int)tab_id;
//char temp[10];
char *tab_idConverted = itoa(tab_idCast);
char *resname=tle->resname;
fputs("Name of column: ", f);
fputs(resname, f);
fputs(" ID: ", f);
fputs(tab_idConverted, f);
fputs("\n", f);
}
//close the file that we write
fputs("$", f);
fclose (f);
}
void create_profile(){
}
void check_anomaly(List *querytree_list){
}但是,当我单击build时,我得到了这个错误:
Description Path Resource Location Type
make: *** [all] Error 2 pgsql C/C++ Problem
make[1]: *** [all] Error 2 pgsql C/C++ Problem
make[2]: *** [postgres] Error 1 pgsql C/C++ Problem
undefined reference to `start_create_profile' /pgsql/src/backend/tcop postgres.c C/C++ Problem我认为这个问题一定与修改postgres源代码有关。有什么想法吗?
谢谢
发布于 2013-02-27 12:06:27
您可以解决在src/backend/tcop的makefile对象中添加test.o的问题。
一个实例可以是
subdir = src/backend/tcop
top_builddir = ../../..
include $(top_builddir)/src/Makefile.global
OBJS= dest.o fastpath.o postgres.o pquery.o utility.o test.o
ifneq (,$(filter $(PORTNAME),cygwin win32))
override CPPFLAGS += -DWIN32_STACK_RLIMIT=$(WIN32_STACK_RLIMIT)
endif
include $(top_srcdir)/src/backend/common.mkhttps://stackoverflow.com/questions/15102536
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