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DMAP comparison against empty string needs to check against NULL too

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'dmap.foo!:' -> (dmap.foo <> '' AND dmap.foo IS NOT NULL)
'dmap.foo:'  -> (dmap.foo = '' OR dmap.foo IS NULL)
This commit is contained in:
Julien BLACHE 2009-12-29 22:04:49 +01:00
parent 8025db2dc2
commit ff03c2679d
1 changed files with 29 additions and 4 deletions
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33
src/DAAP2SQL.g
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@ -162,11 +162,18 @@ expr returns [ pANTLR3_STRING result, int valid ]
}
/* Empty values OK for string fields, NOK for integer */
if ((*val == '\0') && (dqfm->as_int))
if (*val == '\0')
{
DPRINTF(E_LOG, L_DAAP, "No value given in clause '\%s\%s\%c'\n", field, (neg_op) ? "!" : "", op);
$valid = 0;
goto STR_result_valid_0; /* ABORT */
if (dqfm->as_int)
{
DPRINTF(E_LOG, L_DAAP, "No value given in clause '\%s\%s\%c'\n", field, (neg_op) ? "!" : "", op);
$valid = 0;
goto STR_result_valid_0; /* ABORT */
}
/* Need to check against NULL too */
if (op == ':')
$result->append8($result, "(");
}
$result->append8($result, dqfm->db_col);
@ -274,6 +281,24 @@ expr returns [ pANTLR3_STRING result, int valid ]
if (!dqfm->as_int)
$result->append8($result, "'");
/* For empty string value, we need to check against NULL too */
if ((*val == '\0') && (op == ':'))
{
if (neg_op)
$result->append8($result, " AND ");
else
$result->append8($result, " OR ");
$result->append8($result, dqfm->db_col);
if (neg_op)
$result->append8($result, " IS NOT NULL");
else
$result->append8($result, " IS NULL");
$result->append8($result, ")");
}
STR_result_valid_0: /* bail out label */
;