/*******************************************************************************
**
** Source File Name = columns.c  1.3
**
** Licensed Materials - Property of IBM
**
** (C) COPYRIGHT International Business Machines Corp. 1995, 1999
** All Rights Reserved.
**
** US Government Users Restricted Rights - Use, duplication or
** disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
**
**
**    PURPOSE :
** Example using SQLColumns
** - prompts for pattern search values for schema name, table name
** - list all columns for the indicated tables
**
** For more information about these samples see the README file.
**
** For more information on programming in CLI see the:
**     - "Building CLI Applications" section of the Application Building Guide, and the
**     - CLI Guide and Reference.
**
** For more information on the SQL language see the SQL Reference.
**
*******************************************************************************/

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sqlcli1.h>
#include "samputil.h"          /* Header file for CLI sample code */

/* For the Macintosh environment when generating 68K applications */
#ifdef DB268K
   /* Need to include ASLM for 68K applications */
   #include <LibraryManager.h>
#endif

/*
 Global Variables for user id and password.
 To keep samples simple, not a recommended practice.
*/
extern SQLCHAR server[SQL_MAX_DSN_LENGTH + 1] ;
extern SQLCHAR uid[MAX_UID_LENGTH + 1] ;
extern SQLCHAR pwd[MAX_PWD_LENGTH + 1] ;

/* main */
int main( int argc, char * argv[] ) {

    SQLHANDLE henv, hdbc, hstmt ;
    SQLRETURN       rc;
    struct {  SQLINTEGER   ind;
              SQLCHAR      s[129];
           } table_schem, table_name, column_name, type_name;

    struct {  SQLINTEGER   ind;
              SQLCHAR      s[255];
           } remarks;

    SQLINTEGER      length_ind;
    SQLINTEGER      length;
    SQLINTEGER      scale_ind;
    SQLSMALLINT     scale;
    SQLINTEGER      nullable_ind;
    SQLSMALLINT     nullable;

    SQLCHAR         cur_name[512] = "", pre_name[512] = "";

    SQLINTEGER      scale_l;

#ifdef DB268K
   /* Before making any API calls for 68K environment, need to initialize the
      Library Manager */
   InitLibraryManager(0,kCurrentZone,kNormalMemory);
   atexit(CleanupLibraryManager);
#endif

    /* macro to initalize server, uid and pwd */
    INIT_UID_PWD ;

    /* allocate an environment handle */
    rc = SQLAllocHandle( SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv ) ;
    if ( rc != SQL_SUCCESS ) return( terminate( henv, rc ) ) ;

    /* allocate a connect handle, and connect */
    rc = DBconnect( henv, &hdbc ) ;
    if ( rc != SQL_SUCCESS ) return( terminate( henv, rc ) ) ;

    rc = SQLAllocHandle( SQL_HANDLE_STMT, hdbc, &hstmt ) ;
    CHECK_HANDLE( SQL_HANDLE_DBC, hdbc, rc ) ;

    printf("Enter Table Schema Name Search Pattern:\n");
    gets((char *)table_schem.s);
    printf("Enter Table Name Search Pattern:\n");
    gets((char *)table_name.s);

    rc = SQLColumns(hstmt, NULL, 0, table_schem.s, SQL_NTS,
                    table_name.s, SQL_NTS, (SQLCHAR *)"%", SQL_NTS);
    CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;

    rc = SQLBindCol(hstmt, 2, SQL_C_CHAR, (SQLPOINTER) table_schem.s, 129,
                    &table_schem.ind);
    CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;

    rc = SQLBindCol(hstmt, 3, SQL_C_CHAR, (SQLPOINTER) table_name.s, 129,
                    &table_name.ind);
    CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;

    rc = SQLBindCol(hstmt, 4, SQL_C_CHAR, (SQLPOINTER) column_name.s, 129,
                    &column_name.ind);
    CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;

    rc = SQLBindCol(hstmt, 6, SQL_C_CHAR, (SQLPOINTER) type_name.s, 129,
                    &type_name.ind);
    CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;

    rc = SQLBindCol(hstmt, 7, SQL_C_LONG, (SQLPOINTER) & length,
                    sizeof(length), &length_ind);
    CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;

    rc = SQLBindCol(hstmt, 9, SQL_C_SHORT, (SQLPOINTER) & scale,
                    sizeof(scale), &scale_ind);
    CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;

    rc = SQLBindCol(hstmt, 12, SQL_C_CHAR, (SQLPOINTER) remarks.s, 129,
                    &remarks.ind);
    CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;

    rc = SQLBindCol(hstmt, 11, SQL_C_SHORT, (SQLPOINTER) & nullable,
                    sizeof(nullable), &nullable_ind);
    CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;

    /* Fetch each row, and display */
    while ((rc = SQLFetch(hstmt)) == SQL_SUCCESS) {
        sprintf((char *)cur_name, "%s.%s", table_schem.s, table_name.s);
        if (strcmp((const char *)cur_name, (const char *)pre_name) != 0)
           printf( "\n%s\n", cur_name ) ;
        strcpy((char *)pre_name, (char *)cur_name);
        printf("   %s", column_name.s);
        if ( nullable == SQL_NULLABLE ) printf( ", NULLABLE" ) ;
        else printf( ", NOT NULLABLE" ) ;
        printf(", %s", type_name.s);
        printf(" (%ld", length);
        if ( scale_ind != SQL_NULL_DATA ) printf( ", %d)\n", scale ) ;
        else printf( ")\n" ) ;
        if ( remarks.ind > 0 ) printf( "(remarks), %s)\n", remarks.s ) ;
    }                           /* endwhile */

    if ( rc != SQL_NO_DATA_FOUND )
       CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;

    /* free statement resources */

    rc = SQLEndTran( SQL_HANDLE_DBC, hdbc, SQL_COMMIT ) ;
    CHECK_HANDLE( SQL_HANDLE_DBC, hdbc, rc ) ;

    rc = SQLFreeHandle( SQL_HANDLE_STMT, hstmt ) ;
    CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;

    printf( "\n>Disconnecting .....\n" ) ;
    rc = SQLDisconnect( hdbc ) ;
    CHECK_HANDLE( SQL_HANDLE_DBC, hdbc, rc ) ;

    rc = SQLFreeHandle( SQL_HANDLE_DBC, hdbc ) ;
    CHECK_HANDLE( SQL_HANDLE_DBC, hdbc, rc ) ;

    rc = SQLFreeHandle( SQL_HANDLE_ENV,  henv ) ;
    if ( rc != SQL_SUCCESS ) return( terminate( henv, rc ) ) ;

    return( SQL_SUCCESS ) ;

}                                  /* end main */