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#include <stdio.h>
#include <stdlib.h>
#include "global.h"
#include "dbmi.h"
static int srch();
int
update (struct Map_info *Map)
{
int i, *catexst, *cex, upd, fcat;
char buf1[2000], buf2[2000], left[20], right[20];
struct field_info *Fi;
dbString stmt;
dbDriver *driver;
vstat.dupl=0;
vstat.exist=0;
vstat.notexist=0;
vstat.update=0;
vstat.error=0;
db_init_string (&stmt);
if ( (Fi = Vect_get_field ( Map, options.field)) == NULL)
G_fatal_error("Database connection not defined for layer <%d>. Use v.db.connect first.", options.field);
/* Open driver */
driver = db_start_driver_open_database ( Fi->driver, Fi->database );
if ( driver == NULL ) {
G_fatal_error ( "Cannot open database %s by driver %s", Fi->database, Fi->driver );
}
db_begin_transaction ( driver );
/* select existing categories to array (array is sorted) */
vstat.select = db_select_int( driver, Fi->table, Fi->key, NULL, &catexst);
/* create beginning of stmt */
switch (options.option) {
case O_CAT:
sprintf (buf1, "insert into %s ( %s ) values ", Fi->table, Fi->key);
break;
case O_COUNT:
case O_LENGTH:
case O_AREA:
case O_QUERY:
sprintf (buf1, "update %s set %s =", Fi->table, options.col[0]);
break;
case O_COOR:
case O_SIDES:
sprintf (buf1, "update %s set ", Fi->table);
break;
}
/* update */
fprintf ( stderr, "Updating database ... " );
for ( i = 0; i < vstat.rcat; i++ ) {
G_percent( i+1, vstat.rcat, 1 );
fcat = Values[i].cat;
if ( fcat < 0 ) continue;
switch (options.option) {
case O_CAT:
sprintf (buf2, "%s ( %d )", buf1, Values[i].cat);
break;
case O_COUNT:
sprintf (buf2, "%s %d where %s = %d", buf1, Values[i].count1, Fi->key, Values[i].cat);
break;
case O_LENGTH:
case O_AREA:
sprintf (buf2, "%s %f where %s = %d", buf1, Values[i].d1, Fi->key, Values[i].cat);
break;
case O_COOR:
if ( Values[i].count1 > 1 ){
G_warning ( "More points of category %d, nothing loaded to DB", Values[i].cat);
vstat.dupl++;
continue;
}
if ( Values[i].count1 < 1 ){ /* No points */
continue;
}
if ( options.col[2] ) {
sprintf (buf2, "%s %s = %.15g, %s = %.15g, %s = %.15g where %s = %d", buf1, options.col[0],
Values[i].d1, options.col[1], Values[i].d2, options.col[2], Values[i].d3,
Fi->key, Values[i].cat);
} else {
sprintf (buf2, "%s %s = %.15g, %s = %.15g where %s = %d", buf1, options.col[0], Values[i].d1,
options.col[1], Values[i].d2, Fi->key, Values[i].cat);
}
break;
case O_SIDES:
if ( Values[i].count1 == 1 ) {
if ( Values[i].i1 >= 0 )
sprintf ( left, "%d", Values[i].i1 );
else
sprintf ( left, "-1" ); /* NULL, no area/cat */
} else if ( Values[i].count1 > 1 ) {
sprintf ( left, "null" );
} else { /* Values[i].count1 == 0 */
G_warning ( "Bug in this module, nothing found on the left side of line with "
"category %d", Values[i].cat );
sprintf ( left, "null" );
}
if ( Values[i].count2 == 1 ) {
if ( Values[i].i2 >= 0 )
sprintf ( right, "%d", Values[i].i2 );
else
sprintf ( right, "-1" ); /* NULL, no area/cat */
} else if ( Values[i].count2 > 1 ) {
sprintf ( right, "null" );
} else { /* Values[i].count1 == 0 */
G_warning ( "Bug in this module, nothing found on the left side of line with "
"category %d", Values[i].cat );
sprintf ( right, "null" );
}
sprintf (buf2, "%s %s = %s, %s = %s where %s = %d", buf1, options.col[0], left,
options.col[1], right, Fi->key, Values[i].cat);
break;
case O_QUERY:
if ( Values[i].null ) {
sprintf (buf2, "%s null where %s = %d", buf1, Fi->key, Values[i].cat);
} else {
switch ( vstat.qtype ) {
case ( DB_C_TYPE_INT ):
sprintf (buf2, "%s %d where %s = %d", buf1, Values[i].i1, Fi->key, Values[i].cat);
break;
case ( DB_C_TYPE_DOUBLE ):
sprintf (buf2, "%s %f where %s = %d", buf1, Values[i].d1, Fi->key, Values[i].cat);
break;
case ( DB_C_TYPE_STRING ):
sprintf (buf2, "%s '%s' where %s = %d", buf1, Values[i].str1, Fi->key, Values[i].cat);
break;
case ( DB_C_TYPE_DATETIME ):
sprintf (buf2, "%s '%s' where %s = %d", buf1, Values[i].str1, Fi->key, Values[i].cat);
break;
}
}
}
db_set_string (&stmt, buf2);
/* category exist in DB ? */
cex = (int *) bsearch((void *) &fcat, catexst, vstat.select, sizeof(int), srch);
if ( options.option == O_CAT ){
if ( cex == NULL ){ /* cat does not exist in DB */
upd = 1;
vstat.notexist++;
} else { /* cat exists in DB */
G_warning ( "Cat %d: row already exists (not inserted)\n", fcat);
upd = 0;
vstat.exist++;
}
} else {
if ( cex == NULL ){ /* cat does not exist in DB */
G_warning ( "Cat %d row does not exist (not updated)\n", fcat);
upd = 0;
vstat.notexist++;
} else { /* cat exists in DB */
upd = 1;
vstat.exist++;
}
}
if ( upd == 1 ){
if ( options.sql ) {
fprintf (stdout, "%s\n", db_get_string (&stmt) );
} else {
if ( db_execute_immediate (driver, &stmt) == DB_OK ){
vstat.update++;
} else {
vstat.error++;
}
}
}
}
db_commit_transaction ( driver );
free(catexst);
db_close_database_shutdown_driver ( driver );
db_free_string (&stmt);
return 0;
}
int srch ( const void *pa, const void *pb)
{
int *p1 = (int *) pa;
int *p2 = (int *) pb;
if( *p1 < *p2 ) return -1;
if( *p1 > *p2) return 1;
return 0;
}
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