diff options
| -rw-r--r-- | contrib/tsearch2/rank.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/contrib/tsearch2/rank.c b/contrib/tsearch2/rank.c index a58986e4741..046b062b97d 100644 --- a/contrib/tsearch2/rank.c +++ b/contrib/tsearch2/rank.c @@ -288,6 +288,7 @@ calc_rank(float *w, tsvector * t, QUERYTYPE * q, int4 method) { ITEM *item = GETQUERY(q); float res = 0.0; + int len; if (!t->size || !q->size) return 0.0; @@ -303,10 +304,11 @@ calc_rank(float *w, tsvector * t, QUERYTYPE * q, int4 method) case 0: break; case 1: - res /= log((float) cnt_length(t)); + res /= log( (float)(cnt_length(t)+1) ) / log(2.0); break; case 2: - res /= (float) cnt_length(t); + len = cnt_length(t); + if ( len > 0 ) res /= (float)len; break; default: /* internal error */ @@ -609,10 +611,11 @@ rank_cd(PG_FUNCTION_ARGS) case 0: break; case 1: - res /= log((float) cnt_length(txt)); + res /= log( (float)(cnt_length(txt)+1) ); break; case 2: - res /= (float) cnt_length(txt); + len = cnt_length(txt); + if ( len > 0 ) res /= (float)len; break; default: /* internal error */ |