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/*
* wordcount.c
*
*/
#include <stdio.h>
#include "libpq-fe.h"
#include "../halt.h"
#include "libpgeasy.h"
int
main(int argc, char **argv)
{
char query[4000];
int row = 0;
int count;
char line[4000];
char optstr[256];
if (argc != 2)
halt("Usage: %s database\n", argv[0]);
snprintf(optstr, 256, "dbname=%s", argv[1]);
connectdb(optstr);
on_error_continue();
doquery("DROP TABLE words");
on_error_stop();
doquery("\
CREATE TABLE words( \
matches int4, \
word text ) \
");
doquery("\
CREATE INDEX i_words_1 ON words USING btree ( \
word text_ops )\
");
while (1)
{
if (scanf("%s", line) != 1)
break;
doquery("BEGIN WORK");
sprintf(query, "\
DECLARE c_words BINARY CURSOR FOR \
SELECT count(*) \
FROM words \
WHERE word = '%s'", line);
doquery(query);
doquery("FETCH ALL IN c_words");
while (fetch(&count) == END_OF_TUPLES)
count = 0;
doquery("CLOSE c_words");
doquery("COMMIT WORK");
if (count == 0)
sprintf(query, "\
INSERT INTO words \
VALUES (1, '%s')", line);
else
sprintf(query, "\
UPDATE words \
SET matches = matches + 1 \
WHERE word = '%s'", line);
doquery(query);
row++;
}
disconnectdb();
return 0;
}
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