Hello, Pro*C/C++ World!

Posted on 4月 1st, 2012 by cx20

Pro*C/C++

Pro*C/C++ は Oracle Database に対応した C/C++ 用の埋め込み SQL（Embedded SQL）である。類似の製品としては、Pro*COBOL、Pro*FORTRAN、Pro*Pascal 等がある。Pro*C/C++ は、UNIX 環境で C/C++ を用いた開発に使用されることが多い。
なお、埋め込み SQL 自体は、標準SQL として ANSI/ISO にて仕様が策定されている。

ソースコード

hello.pc
raw download
#include <stdio.h>
 
EXEC SQL INCLUDE SQLCA;
 
int main( int argc, char* argv[] )
{
    EXEC SQL BEGIN DECLARE SECTION;
    char username[] = "scott";
    char password[] = "tiger";
    char message[32];
    EXEC SQL END DECLARE SECTION;
    EXEC SQL CONNECT :username IDENTIFIED BY :password;
    EXEC SQL DECLARE C1 CURSOR FOR
        SELECT 'Hello, Pro*C/C++ World!' AS Message FROM DUAL;
    EXEC SQL OPEN C1;
    EXEC SQL WHENEVER NOT FOUND DO BREAK;
    for (;;)
    {
        EXEC SQL FETCH C1 INTO :message;
        printf("Messagen");
        printf("-----------------------n");
        printf("%sn", message);
    }
    EXEC SQL CLOSE C1;
    EXEC SQL COMMIT RELEASE;
    return 0;
}

上記コードは、proc プリプロセッサにより、以下の C言語のコードが生成される。

ソースコード

hello.c
raw download
/* Result Sets Interface */
#ifndef SQL_CRSR
#  define SQL_CRSR
  struct sql_cursor
  {
    unsigned int curocn;
    void *ptr1;
    void *ptr2;
    unsigned int magic;
  };
  typedef struct sql_cursor sql_cursor;
  typedef struct sql_cursor SQL_CURSOR;
#endif /* SQL_CRSR */
/* Thread Safety */
typedef void * sql_context;
typedef void * SQL_CONTEXT;
/* Object support */
struct sqltvn
{
  unsigned char *tvnvsn; 
  unsigned short tvnvsnl; 
  unsigned char *tvnnm;
  unsigned short tvnnml; 
  unsigned char *tvnsnm;
  unsigned short tvnsnml;
};
typedef struct sqltvn sqltvn;
struct sqladts
{
  unsigned int adtvsn; 
  unsigned short adtmode; 
  unsigned short adtnum;  
  sqltvn adttvn[1];       
};
typedef struct sqladts sqladts;
static struct sqladts sqladt = {
  1,1,0,
};
/* Binding to PL/SQL Records */
struct sqltdss
{
  unsigned int tdsvsn; 
  unsigned short tdsnum; 
  unsigned char *tdsval[1]; 
};
typedef struct sqltdss sqltdss;
static struct sqltdss sqltds =
{
  1,
  0,
};
/* File name & Package Name */
struct sqlcxp
{
  unsigned short fillen;
           char  filnam[9];
};
static const struct sqlcxp sqlfpn =
{
    8,
    "hello.pc"
};
static unsigned int sqlctx = 18323;
static struct sqlexd {
   unsigned int   sqlvsn;
   unsigned int   arrsiz;
   unsigned int   iters;
   unsigned int   offset;
   unsigned short selerr;
   unsigned short sqlety;
   unsigned int   occurs;
      const short *cud;
   unsigned char  *sqlest;
      const char  *stmt;
   sqladts *sqladtp;
   sqltdss *sqltdsp;
            void  **sqphsv;
   unsigned int   *sqphsl;
            int   *sqphss;
            void  **sqpind;
            int   *sqpins;
   unsigned int   *sqparm;
   unsigned int   **sqparc;
   unsigned short  *sqpadto;
   unsigned short  *sqptdso;
   unsigned int   sqlcmax;
   unsigned int   sqlcmin;
   unsigned int   sqlcincr;
   unsigned int   sqlctimeout;
   unsigned int   sqlcnowait;
              int   sqfoff;
   unsigned int   sqcmod;
   unsigned int   sqfmod;
            void  *sqhstv[4];
   unsigned int   sqhstl[4];
            int   sqhsts[4];
            void  *sqindv[4];
            int   sqinds[4];
   unsigned int   sqharm[4];
   unsigned int   *sqharc[4];
   unsigned short  sqadto[4];
   unsigned short  sqtdso[4];
} sqlstm = {12,4};
/* SQLLIB Prototypes */
extern void sqlcxt (void **, unsigned int *,
                    struct sqlexd *, const struct sqlcxp *);
extern void sqlcx2t(void **, unsigned int *,
                    struct sqlexd *, const struct sqlcxp *);
extern void sqlbuft(void **, char *);
extern void sqlgs2t(void **, char *);
extern void sqlorat(void **, unsigned int *, void *);
/* Forms Interface */
static const int IAPSUCC = 0;
static const int IAPFAIL = 1403;
static const int IAPFTL  = 535;
extern void sqliem(unsigned char *, signed int *);
 static const char *sq0002 = 
"select 'Hello, Pro*C World!' Message  from DUAL            ";
typedef struct { unsigned short len; unsigned char arr[1]; } VARCHAR;
typedef struct { unsigned short len; unsigned char arr[1]; } varchar;
/* cud (compilation unit data) array */
static const short sqlcud0[] =
{12,4130,838,0,0,
5,0,0,0,0,0,27,12,0,0,4,4,0,1,0,1,97,0,0,1,97,0,0,1,10,0,0,1,10,0,0,
36,0,0,2,59,0,9,15,0,0,0,0,0,1,0,
51,0,0,2,0,0,13,19,0,0,1,0,0,1,0,2,97,0,0,
70,0,0,2,0,0,15,24,0,0,0,0,0,1,0,
85,0,0,3,0,0,30,25,0,0,0,0,0,1,0,
};
#include <stdio.h>
/* EXEC SQL INCLUDE SQLCA;
 */ 
 
#ifndef SQLCA
#define SQLCA 1
 
struct   sqlca
         {
         /* ub1 */ char    sqlcaid[8];
         /* b4  */ int     sqlabc;
         /* b4  */ int     sqlcode;
         struct
           {
           /* ub2 */ unsigned short sqlerrml;
           /* ub1 */ char           sqlerrmc[70];
           } sqlerrm;
         /* ub1 */ char    sqlerrp[8];
         /* b4  */ int     sqlerrd[6];
         /* ub1 */ char    sqlwarn[8];
         /* ub1 */ char    sqlext[8];
         };
#ifndef SQLCA_NONE 
#ifdef   SQLCA_STORAGE_CLASS
SQLCA_STORAGE_CLASS struct sqlca sqlca
#else
         struct sqlca sqlca
#endif
 
#ifdef  SQLCA_INIT
         = {
         {'S', 'Q', 'L', 'C', 'A', ' ', ' ', ' '},
         sizeof(struct sqlca),
         0,
         { 0, {0}},
         {'N', 'O', 'T', ' ', 'S', 'E', 'T', ' '},
         {0, 0, 0, 0, 0, 0},
         {0, 0, 0, 0, 0, 0, 0, 0},
         {0, 0, 0, 0, 0, 0, 0, 0}
         }
#endif
         ;
#endif
 
#endif
 
/* end SQLCA */
int main( int argc, char* argv[] )
{
    /* EXEC SQL BEGIN DECLARE SECTION; */ 
    char username[] = "scott";
    char password[] = "tiger";
    char message[32];
    /* EXEC SQL END DECLARE SECTION; */ 
    /* EXEC SQL CONNECT :username IDENTIFIED BY :password; */ 
{
    struct sqlexd sqlstm;
    sqlstm.sqlvsn = 12;
    sqlstm.arrsiz = 4;
    sqlstm.sqladtp = &sqladt;
    sqlstm.sqltdsp = &sqltds;
    sqlstm.iters = (unsigned int  )10;
    sqlstm.offset = (unsigned int  )5;
    sqlstm.cud = sqlcud0;
    sqlstm.sqlest = (unsigned char  *)&sqlca;
    sqlstm.sqlety = (unsigned short)4352;
    sqlstm.occurs = (unsigned int  )0;
    sqlstm.sqhstv[0] = (         void  *)username;
    sqlstm.sqhstl[0] = (unsigned int  )0;
    sqlstm.sqhsts[0] = (         int  )0;
    sqlstm.sqindv[0] = (         void  *)0;
    sqlstm.sqinds[0] = (         int  )0;
    sqlstm.sqharm[0] = (unsigned int  )0;
    sqlstm.sqadto[0] = (unsigned short )0;
    sqlstm.sqtdso[0] = (unsigned short )0;
    sqlstm.sqhstv[1] = (         void  *)password;
    sqlstm.sqhstl[1] = (unsigned int  )0;
    sqlstm.sqhsts[1] = (         int  )0;
    sqlstm.sqindv[1] = (         void  *)0;
    sqlstm.sqinds[1] = (         int  )0;
    sqlstm.sqharm[1] = (unsigned int  )0;
    sqlstm.sqadto[1] = (unsigned short )0;
    sqlstm.sqtdso[1] = (unsigned short )0;
    sqlstm.sqphsv = sqlstm.sqhstv;
    sqlstm.sqphsl = sqlstm.sqhstl;
    sqlstm.sqphss = sqlstm.sqhsts;
    sqlstm.sqpind = sqlstm.sqindv;
    sqlstm.sqpins = sqlstm.sqinds;
    sqlstm.sqparm = sqlstm.sqharm;
    sqlstm.sqparc = sqlstm.sqharc;
    sqlstm.sqpadto = sqlstm.sqadto;
    sqlstm.sqptdso = sqlstm.sqtdso;
    sqlstm.sqlcmax = (unsigned int )100;
    sqlstm.sqlcmin = (unsigned int )2;
    sqlstm.sqlcincr = (unsigned int )1;
    sqlstm.sqlctimeout = (unsigned int )0;
    sqlstm.sqlcnowait = (unsigned int )0;
    sqlcxt((void **)0, &sqlctx, &sqlstm, &sqlfpn);
}
    /* EXEC SQL DECLARE C1 CURSOR FOR
        SELECT 'Hello, Pro*C/C++ World!' AS Message FROM DUAL; */ 
    /* EXEC SQL OPEN C1; */ 
{
    struct sqlexd sqlstm;
    sqlstm.sqlvsn = 12;
    sqlstm.arrsiz = 4;
    sqlstm.sqladtp = &sqladt;
    sqlstm.sqltdsp = &sqltds;
    sqlstm.stmt = sq0002;
    sqlstm.iters = (unsigned int  )1;
    sqlstm.offset = (unsigned int  )36;
    sqlstm.selerr = (unsigned short)1;
    sqlstm.cud = sqlcud0;
    sqlstm.sqlest = (unsigned char  *)&sqlca;
    sqlstm.sqlety = (unsigned short)4352;
    sqlstm.occurs = (unsigned int  )0;
    sqlstm.sqcmod = (unsigned int )0;
    sqlcxt((void **)0, &sqlctx, &sqlstm, &sqlfpn);
}
    /* EXEC SQL WHENEVER NOT FOUND DO BREAK; */ 
    for (;;)
    {
        /* EXEC SQL FETCH C1 INTO :message; */ 
{
        struct sqlexd sqlstm;
        sqlstm.sqlvsn = 12;
        sqlstm.arrsiz = 4;
        sqlstm.sqladtp = &sqladt;
        sqlstm.sqltdsp = &sqltds;
        sqlstm.iters = (unsigned int  )1;
        sqlstm.offset = (unsigned int  )51;
        sqlstm.selerr = (unsigned short)1;
        sqlstm.cud = sqlcud0;
        sqlstm.sqlest = (unsigned char  *)&sqlca;
        sqlstm.sqlety = (unsigned short)4352;
        sqlstm.occurs = (unsigned int  )0;
        sqlstm.sqfoff = (           int )0;
        sqlstm.sqfmod = (unsigned int )2;
        sqlstm.sqhstv[0] = (         void  *)message;
        sqlstm.sqhstl[0] = (unsigned int  )32;
        sqlstm.sqhsts[0] = (         int  )0;
        sqlstm.sqindv[0] = (         void  *)0;
        sqlstm.sqinds[0] = (         int  )0;
        sqlstm.sqharm[0] = (unsigned int  )0;
        sqlstm.sqadto[0] = (unsigned short )0;
        sqlstm.sqtdso[0] = (unsigned short )0;
        sqlstm.sqphsv = sqlstm.sqhstv;
        sqlstm.sqphsl = sqlstm.sqhstl;
        sqlstm.sqphss = sqlstm.sqhsts;
        sqlstm.sqpind = sqlstm.sqindv;
        sqlstm.sqpins = sqlstm.sqinds;
        sqlstm.sqparm = sqlstm.sqharm;
        sqlstm.sqparc = sqlstm.sqharc;
        sqlstm.sqpadto = sqlstm.sqadto;
        sqlstm.sqptdso = sqlstm.sqtdso;
        sqlcxt((void **)0, &sqlctx, &sqlstm, &sqlfpn);
        if (sqlca.sqlcode == 1403) break;
}
        printf("Messagen");
        printf("-----------------------n");
        printf("%sn", message);
    }
    /* EXEC SQL CLOSE C1; */ 
{
    struct sqlexd sqlstm;
    sqlstm.sqlvsn = 12;
    sqlstm.arrsiz = 4;
    sqlstm.sqladtp = &sqladt;
    sqlstm.sqltdsp = &sqltds;
    sqlstm.iters = (unsigned int  )1;
    sqlstm.offset = (unsigned int  )70;
    sqlstm.cud = sqlcud0;
    sqlstm.sqlest = (unsigned char  *)&sqlca;
    sqlstm.sqlety = (unsigned short)4352;
    sqlstm.occurs = (unsigned int  )0;
    sqlcxt((void **)0, &sqlctx, &sqlstm, &sqlfpn);
}
    /* EXEC SQL COMMIT RELEASE; */ 
{
    struct sqlexd sqlstm;
    sqlstm.sqlvsn = 12;
    sqlstm.arrsiz = 4;
    sqlstm.sqladtp = &sqladt;
    sqlstm.sqltdsp = &sqltds;
    sqlstm.iters = (unsigned int  )1;
    sqlstm.offset = (unsigned int  )85;
    sqlstm.cud = sqlcud0;
    sqlstm.sqlest = (unsigned char  *)&sqlca;
    sqlstm.sqlety = (unsigned short)4352;
    sqlstm.occurs = (unsigned int  )0;
    sqlcxt((void **)0, &sqlctx, &sqlstm, &sqlfpn);
}
    return 0;
}

コンパイル＆リンク方法（Visual C++）

C:¥> SET PATH=ORACLE_BASEORACLE_HOMEbin;%PATH%
C:¥> SET INCLUDE=ORACLE_BASEORACLE_HOMEprecomppublic;%INCLUDE%
C:¥> SET LIB=ORACLE_BASEORACLE_HOMEprecomplib;%LIB%
C:¥> proc hello.pc
C:¥> cl hello.c /link orasql11.lib

実行結果

Message
-----------------------
Hello, Pro*C/C++ World!
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Tags:

Categories: library, Oracle Database, Pro*C, SQL

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