set enable_bitmapscan=off;

explain (costs off)

SELECT a <=> to_tsquery('pg_catalog.english', 'w:*'), *

FROM test_rum

WHERE a @@ to_tsquery('pg_catalog.english', 'w:*')

ORDER BY a <=> to_tsquery('pg_catalog.english', 'w:*');

QUERY PLAN

-----------------------------------------

Index Scan using rumidx on test_rum

Index Cond: (a @@ '''w'':*'::tsquery)

Order By: (a <=> '''w'':*'::tsquery)

(3 rows)

SELECT a <=> to_tsquery('pg_catalog.english', 'w:*'), *

FROM test_rum

WHERE a @@ to_tsquery('pg_catalog.english', 'w:*')

ORDER BY a <=> to_tsquery('pg_catalog.english', 'w:*');

?column? | t | a

----------+--------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------

8.22467 | so well that only a fragment, as it were, gave way. It still hangs as if | 'fragment':6 'gave':10 'hang':14 'still':13 'way':11 'well':2

8.22467 | wine, but wouldn’t you divide with your neighbors! The columns in the | 'column':11 'divid':6 'neighbor':9 'wine':1 'wouldn':3

8.22467 | not say, but you wrote as if you knew it by sight as well as by heart. | 'heart':17 'knew':9 'say':2 'sight':12 'well':14 'wrote':5

16.4493 | little series of pictures. Have you ever been here, I wonder? You did | 'ever':7 'littl':1 'pictur':4 'seri':2 'wonder':11

16.4493 | itself. Put on your “specs” and look at the castle, half way up the | 'castl':10 'half':11 'look':7 'put':2 'spec':5 'way':12

16.4493 | _berg_, “the Jettenhuhl, a wooded spur of the Konigestuhl.” Look at it | 'berg':1 'jettenhuhl':3 'konigestuhl':9 'look':10 'spur':6 'wood':5

16.4493 | thickness of the walls, twenty-one feet, and the solid masonry, held it | 'feet':8 'held':13 'masonri':12 'one':7 'solid':11 'thick':1 'twenti':6 'twenty-on':5 'wall':4

16.4493 | ornamental building, and I wish you could see it, if you have not seen | 'build':2 'could':7 'ornament':1 'see':8 'seen':14 'wish':5

16.4493 | thinking--“to go or not to go?” We are this far on the way. Reached | 'far':11 'go':3,7 'reach':15 'think':1 'way':14

16.4493 | curious spectacle, but on the whole had “the banquet-hall deserted” | 'banquet':10 'banquet-hal':9 'curious':1 'desert':12 'hall':11 'spectacl':2 'whole':6

16.4493 | As a reward for your reformation I write to you on this precious sheet. | 'precious':13 'reform':6 'reward':3 'sheet':14 'write':8

16.4493 | entrance of the Black Forest, among picturesque, thickly-wooded hills, | 'among':6 'black':4 'entranc':1 'forest':5 'hill':11 'picturesqu':7 'thick':9 'thickly-wood':8 'wood':10

16.4493 | You see I have come to be wonderfully attached to Heidelberg, the | 'attach':9 'come':5 'heidelberg':11 'see':2 'wonder':8

16.4493 | my appreciation of you in a more complimentary way than by sending this | 'appreci':2 'complimentari':8 'send':12 'way':9

(14 rows)

SELECT a <=> to_tsquery('pg_catalog.english', 'b:*'), *

FROM test_rum

WHERE a @@ to_tsquery('pg_catalog.english', 'b:*')

ORDER BY a <=> to_tsquery('pg_catalog.english', 'b:*');

?column? | t | a

----------+--------------------------------------------------------------------------+----------------------------------------------------------------------------------------------------------

8.22467 | been trying my best to get all those “passes” into my brain. Now, thanks | 'best':4 'brain':12 'get':6 'pass':9 'thank':14 'tri':2

8.22467 | All the above information, I beg you to believe, I do not intend you | 'beg':6 'believ':9 'inform':4 'intend':13

8.22467 | curious spectacle, but on the whole had “the banquet-hall deserted” | 'banquet':10 'banquet-hal':9 'curious':1 'desert':12 'hall':11 'spectacl':2 'whole':6

8.22467 | oaks, limes and maples, bordered with flower-beds and shrubberies, and | 'bed':9 'border':5 'flower':8 'flower-b':7 'lime':2 'mapl':4 'oak':1 'shrubberi':11

13.1595 | foo bar foo the over foo qq bar | 'bar':2,8 'foo':1,3,6 'qq':7

16.4493 | ornamental building, and I wish you could see it, if you have not seen | 'build':2 'could':7 'ornament':1 'see':8 'seen':14 'wish':5

16.4493 | the--nearest guide-book! | 'book':5 'guid':4 'guide-book':3 'nearest':2

16.4493 | to your letter, I have them all in the handiest kind of a bunch. Ariel | 'ariel':15 'bunch':14 'handiest':10 'kind':11 'letter':3

16.4493 | beautiful, the quaint, the historically poetic, learned and picturesque | 'beauti':1 'histor':5 'learn':7 'picturesqu':9 'poetic':6 'quaint':3

16.4493 | there are dreadful reports of floods and roads caved in and bridges | 'bridg':12 'cave':9 'dread':3 'flood':6 'report':4 'road':8

16.4493 | the Conversationhaus, the bazaar, mingling with the throng, listening to | 'bazaar':4 'conversationhaus':2 'listen':9 'mingl':5 'throng':8

16.4493 | the band, and comparing what it is with what it was. It was a gay and | 'band':2 'compar':4 'gay':15

16.4493 | look. The situation is most beautiful. It lies, you know, at the | 'beauti':6 'know':10 'lie':8 'look':1 'situat':3

16.4493 | entrance of the Black Forest, among picturesque, thickly-wooded hills, | 'among':6 'black':4 'entranc':1 'forest':5 'hill':11 'picturesqu':7 'thick':9 'thickly-wood':8 'wood':10

16.4493 | town with angry, headlong speed. There is an avenue along its bank of | 'along':10 'angri':3 'avenu':9 'bank':12 'headlong':4 'speed':5 'town':1

16.4493 | like, “I’ll do my bidding gently,” and as surely, if I get there. But | 'bid':6 'gentl':7 'get':13 'like':1 'll':3 'sure':10

16.4493 | _berg_, “the Jettenhuhl, a wooded spur of the Konigestuhl.” Look at it | 'berg':1 'jettenhuhl':3 'konigestuhl':9 'look':10 'spur':6 'wood':5

16.4493 | Gesprente Thurm is the one that was blown up by the French. The | 'blown':8 'french':12 'gesprent':1 'one':5 'thurm':2

16.4493 | portico that shows in the Schlosshof are the four brought from | 'brought':10 'four':9 'portico':1 'schlosshof':6 'show':3

16.4493 | the few that escaped destruction in 1693. It is a beautiful, highly | '1693':7 'beauti':11 'destruct':5 'escap':4 'high':12

(20 rows)

CREATE FUNCTION rum_ts_join_pos(internal, internal) -- to prevent calling from SQL

RETURNS bytea

AS 'MODULE_PATHNAME'

LANGUAGE C IMMUTABLE STRICT;

FUNCTION 10 rum_ts_join_pos(internal, internal),

FmgrInfo joinAddInfoFn[INDEX_MAX_KEYS]; /* optional method */

bool canJoinAddInfo[INDEX_MAX_KEYS];

/* or here if we need to store addinfo */

Tuplesortstate *matchSortstate;

RumKey collectRumKey;

#define RUM_ADDINFO_JOIN 10

#define RUMNProcs 10

PG_FUNCTION_INFO_V1(rum_ts_join_pos);

rum_ts_join_pos(PG_FUNCTION_ARGS)

{

Datum addInfo1 = PG_GETARG_DATUM(0);

Datum addInfo2 = PG_GETARG_DATUM(1);

char *in1 = VARDATA_ANY(addInfo1),

*in2 = VARDATA_ANY(addInfo2);

bytea *result;

int count1 = count_pos(in1, VARSIZE_ANY_EXHDR(addInfo1)),

count2 = count_pos(in2, VARSIZE_ANY_EXHDR(addInfo2)),

countRes = 0,

i1 = 0, i2 = 0, size;

uint16 pos1, pos2, *pos;

result = palloc(VARHDRSZ + sizeof(uint16) * (count1 + count2));

pos = palloc(sizeof(uint16) * (count1 + count2));

Assert(count1 > 0 && count2 > 0);

in1 = decompress_pos(in1, &pos1);

in2 = decompress_pos(in2, &pos2);

while(i1 < count1 && i2 < count2)

{

if (WEP_GETPOS(pos1) > WEP_GETPOS(pos2))

{

pos[countRes++] = pos2;

if (i2 < count2)

in2 = decompress_pos(in2, &pos2);

i2++;

}

else if (WEP_GETPOS(pos1) < WEP_GETPOS(pos2))

{

pos[countRes++] = pos1;

if (i1 < count1)

in1 = decompress_pos(in1, &pos1);

i1++;

}

else

{

pos[countRes++] = pos1;

if (i1 < count1)

in1 = decompress_pos(in1, &pos1);

if (i2 < count2)

in2 = decompress_pos(in2, &pos2);

i1++;

i2++;

}

}

while(i1 < count1)

{

pos[countRes++] = pos1;

if (i1 < count1)

in1 = decompress_pos(in1, &pos1);

i1++;

}

while(i2 < count2)

{

pos[countRes++] = pos2;

if (i2 < count2)

in2 = decompress_pos(in2, &pos2);

i2++;

}

size = compress_pos(result->vl_dat, pos, countRes) + VARHDRSZ;

SET_VARSIZE(result, size);

PG_RETURN_BYTEA_P(result);

}