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Update fti README and stopwords.

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This commit is contained in:
Bruce Momjian 1998-07-20 02:45:03 +00:00
parent 39282daa12
commit 0de96f82dc
2 changed files with 8 additions and 0 deletions
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3
contrib/fulltextindex/README
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@ -27,6 +27,9 @@ the fti-table and the orig-table, we can get the actual rows we want
(this can also be done by using subselects, and maybe there're other (this can also be done by using subselects, and maybe there're other
ways too). ways too).
The trigger code also allows an array called StopWords, that prevents
certain words from being indexed.
As an example we take the previous query, where we assume we have all As an example we take the previous query, where we assume we have all
sub-strings in the table 'cds-fti': sub-strings in the table 'cds-fti':

5
contrib/fulltextindex/fti.c
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@ -70,9 +70,11 @@ bool new_tuple = false;
/* THIS LIST MUST BE IN SORTED ORDER, A BINARY SEARCH IS USED!!!! */ /* THIS LIST MUST BE IN SORTED ORDER, A BINARY SEARCH IS USED!!!! */
char *StopWords[] = { /* list of words to skip in indexing */ char *StopWords[] = { /* list of words to skip in indexing */
#ifdef SAMPLE_STOP_WORDS
"no" "no"
"the", "the",
"yes", "yes",
#endif
}; };
/* stuff for caching query-plans, stolen from contrib/spi/\*.c */ /* stuff for caching query-plans, stolen from contrib/spi/\*.c */
@ -331,6 +333,9 @@ is_stopword(char *text)
StopLow = &StopWords[0]; /* initialize stuff for binary search */ StopLow = &StopWords[0]; /* initialize stuff for binary search */
StopHigh = endof(StopWords); StopHigh = endof(StopWords);
if (lengthof(StopWords) == 0)
return false;
while (StopLow <= StopHigh) while (StopLow <= StopHigh)
{ {
StopMiddle = StopLow + (StopHigh - StopLow) / 2; StopMiddle = StopLow + (StopHigh - StopLow) / 2;