postgresql/contrib/pg_trgm/expected/pg_trgm.out
Tom Lane a80818605e Improve selectivity estimation for assorted match-style operators.
Quite a few matching operators such as JSONB's @> used "contsel" and
"contjoinsel" as their selectivity estimators.  That was a bad idea,
because (a) contsel is only a stub, yielding a fixed default estimate,
and (b) that default is 0.001, meaning we estimate these operators as
five times more selective than equality, which is surely pretty silly.

There's a good model for improving this in ltree's ltreeparentsel():
for any "var OP constant" query, we can try applying the operator
to all of the column's MCV and histogram values, taking the latter
as being a random sample of the non-MCV values.  That code is
actually 100% generic, except for the question of exactly what
default selectivity ought to be plugged in when we don't have stats.

Hence, migrate the guts of ltreeparentsel() into the core code, provide
wrappers "matchingsel" and "matchingjoinsel" with a more-appropriate
default estimate, and use those for the non-geometric operators that
formerly used contsel (mostly JSONB containment operators and tsquery
matching).

Also apply this code to some match-like operators in hstore, ltree, and
pg_trgm, including the former users of ltreeparentsel as well as ones
that improperly used contsel.  Since commit 911e70207 just created new
versions of those extensions that we haven't released yet, we can sneak
this change into those new versions instead of having to create an
additional generation of update scripts.

Patch by me, reviewed by Alexey Bashtanov

Discussion: https://postgr.es/m/12237.1582833074@sss.pgh.pa.us
2020-04-01 10:32:33 -04:00

5209 lines
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Plaintext

CREATE EXTENSION pg_trgm;
-- Check whether any of our opclasses fail amvalidate
SELECT amname, opcname
FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
amname | opcname
--------+---------
(0 rows)
--backslash is used in tests below, installcheck will fail if
--standard_conforming_string is off
set standard_conforming_strings=on;
-- reduce noise
set extra_float_digits = 0;
select show_trgm('');
show_trgm
-----------
{}
(1 row)
select show_trgm('(*&^$@%@');
show_trgm
-----------
{}
(1 row)
select show_trgm('a b c');
show_trgm
---------------------------------------
{" a"," b"," c"," a "," b "," c "}
(1 row)
select show_trgm(' a b c ');
show_trgm
---------------------------------------
{" a"," b"," c"," a "," b "," c "}
(1 row)
select show_trgm('aA bB cC');
show_trgm
---------------------------------------------------------
{" a"," b"," c"," aa"," bb"," cc","aa ","bb ","cc "}
(1 row)
select show_trgm(' aA bB cC ');
show_trgm
---------------------------------------------------------
{" a"," b"," c"," aa"," bb"," cc","aa ","bb ","cc "}
(1 row)
select show_trgm('a b C0*%^');
show_trgm
---------------------------------------------
{" a"," b"," c"," a "," b "," c0","c0 "}
(1 row)
select similarity('wow','WOWa ');
similarity
------------
0.5
(1 row)
select similarity('wow',' WOW ');
similarity
------------
1
(1 row)
select similarity('---', '####---');
similarity
------------
0
(1 row)
CREATE TABLE test_trgm(t text COLLATE "C");
\copy test_trgm from 'data/trgm.data'
select t,similarity(t,'qwertyu0988') as sml from test_trgm where t % 'qwertyu0988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 1
qwertyu0980 | 0.714286
qwertyu0981 | 0.714286
qwertyu0982 | 0.714286
qwertyu0983 | 0.714286
qwertyu0984 | 0.714286
qwertyu0985 | 0.714286
qwertyu0986 | 0.714286
qwertyu0987 | 0.714286
qwertyu0989 | 0.714286
qwertyu0088 | 0.6
qwertyu0098 | 0.6
qwertyu0188 | 0.6
qwertyu0288 | 0.6
qwertyu0388 | 0.6
qwertyu0488 | 0.6
qwertyu0588 | 0.6
qwertyu0688 | 0.6
qwertyu0788 | 0.6
qwertyu0888 | 0.6
qwertyu0900 | 0.6
qwertyu0901 | 0.6
qwertyu0902 | 0.6
qwertyu0903 | 0.6
qwertyu0904 | 0.6
qwertyu0905 | 0.6
qwertyu0906 | 0.6
qwertyu0907 | 0.6
qwertyu0908 | 0.6
qwertyu0909 | 0.6
qwertyu0910 | 0.6
qwertyu0911 | 0.6
qwertyu0912 | 0.6
qwertyu0913 | 0.6
qwertyu0914 | 0.6
qwertyu0915 | 0.6
qwertyu0916 | 0.6
qwertyu0917 | 0.6
qwertyu0918 | 0.6
qwertyu0919 | 0.6
qwertyu0920 | 0.6
qwertyu0921 | 0.6
qwertyu0922 | 0.6
qwertyu0923 | 0.6
qwertyu0924 | 0.6
qwertyu0925 | 0.6
qwertyu0926 | 0.6
qwertyu0927 | 0.6
qwertyu0928 | 0.6
qwertyu0929 | 0.6
qwertyu0930 | 0.6
qwertyu0931 | 0.6
qwertyu0932 | 0.6
qwertyu0933 | 0.6
qwertyu0934 | 0.6
qwertyu0935 | 0.6
qwertyu0936 | 0.6
qwertyu0937 | 0.6
qwertyu0938 | 0.6
qwertyu0939 | 0.6
qwertyu0940 | 0.6
qwertyu0941 | 0.6
qwertyu0942 | 0.6
qwertyu0943 | 0.6
qwertyu0944 | 0.6
qwertyu0945 | 0.6
qwertyu0946 | 0.6
qwertyu0947 | 0.6
qwertyu0948 | 0.6
qwertyu0949 | 0.6
qwertyu0950 | 0.6
qwertyu0951 | 0.6
qwertyu0952 | 0.6
qwertyu0953 | 0.6
qwertyu0954 | 0.6
qwertyu0955 | 0.6
qwertyu0956 | 0.6
qwertyu0957 | 0.6
qwertyu0958 | 0.6
qwertyu0959 | 0.6
qwertyu0960 | 0.6
qwertyu0961 | 0.6
qwertyu0962 | 0.6
qwertyu0963 | 0.6
qwertyu0964 | 0.6
qwertyu0965 | 0.6
qwertyu0966 | 0.6
qwertyu0967 | 0.6
qwertyu0968 | 0.6
qwertyu0969 | 0.6
qwertyu0970 | 0.6
qwertyu0971 | 0.6
qwertyu0972 | 0.6
qwertyu0973 | 0.6
qwertyu0974 | 0.6
qwertyu0975 | 0.6
qwertyu0976 | 0.6
qwertyu0977 | 0.6
qwertyu0978 | 0.6
qwertyu0979 | 0.6
qwertyu0990 | 0.6
qwertyu0991 | 0.6
qwertyu0992 | 0.6
qwertyu0993 | 0.6
qwertyu0994 | 0.6
qwertyu0995 | 0.6
qwertyu0996 | 0.6
qwertyu0997 | 0.6
qwertyu0998 | 0.6
qwertyu0999 | 0.6
qwertyu0001 | 0.5
qwertyu0002 | 0.5
qwertyu0003 | 0.5
qwertyu0004 | 0.5
qwertyu0005 | 0.5
qwertyu0006 | 0.5
qwertyu0007 | 0.5
qwertyu0008 | 0.5
qwertyu0009 | 0.5
qwertyu0010 | 0.5
qwertyu0011 | 0.5
qwertyu0012 | 0.5
qwertyu0013 | 0.5
qwertyu0014 | 0.5
qwertyu0015 | 0.5
qwertyu0016 | 0.5
qwertyu0017 | 0.5
qwertyu0018 | 0.5
qwertyu0019 | 0.5
qwertyu0020 | 0.5
qwertyu0021 | 0.5
qwertyu0022 | 0.5
qwertyu0023 | 0.5
qwertyu0024 | 0.5
qwertyu0025 | 0.5
qwertyu0026 | 0.5
qwertyu0027 | 0.5
qwertyu0028 | 0.5
qwertyu0029 | 0.5
qwertyu0030 | 0.5
qwertyu0031 | 0.5
qwertyu0032 | 0.5
qwertyu0033 | 0.5
qwertyu0034 | 0.5
qwertyu0035 | 0.5
qwertyu0036 | 0.5
qwertyu0037 | 0.5
qwertyu0038 | 0.5
qwertyu0039 | 0.5
qwertyu0040 | 0.5
qwertyu0041 | 0.5
qwertyu0042 | 0.5
qwertyu0043 | 0.5
qwertyu0044 | 0.5
qwertyu0045 | 0.5
qwertyu0046 | 0.5
qwertyu0047 | 0.5
qwertyu0048 | 0.5
qwertyu0049 | 0.5
qwertyu0050 | 0.5
qwertyu0051 | 0.5
qwertyu0052 | 0.5
qwertyu0053 | 0.5
qwertyu0054 | 0.5
qwertyu0055 | 0.5
qwertyu0056 | 0.5
qwertyu0057 | 0.5
qwertyu0058 | 0.5
qwertyu0059 | 0.5
qwertyu0060 | 0.5
qwertyu0061 | 0.5
qwertyu0062 | 0.5
qwertyu0063 | 0.5
qwertyu0064 | 0.5
qwertyu0065 | 0.5
qwertyu0066 | 0.5
qwertyu0067 | 0.5
qwertyu0068 | 0.5
qwertyu0069 | 0.5
qwertyu0070 | 0.5
qwertyu0071 | 0.5
qwertyu0072 | 0.5
qwertyu0073 | 0.5
qwertyu0074 | 0.5
qwertyu0075 | 0.5
qwertyu0076 | 0.5
qwertyu0077 | 0.5
qwertyu0078 | 0.5
qwertyu0079 | 0.5
qwertyu0080 | 0.5
qwertyu0081 | 0.5
qwertyu0082 | 0.5
qwertyu0083 | 0.5
qwertyu0084 | 0.5
qwertyu0085 | 0.5
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qwertyu0089 | 0.5
qwertyu0090 | 0.5
qwertyu0091 | 0.5
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qwertyu0101 | 0.5
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qwertyu0115 | 0.5
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qwertyu0124 | 0.5
qwertyu0125 | 0.5
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qwertyu0240 | 0.5
qwertyu0241 | 0.5
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qwertyu0270 | 0.5
qwertyu0271 | 0.5
qwertyu0272 | 0.5
qwertyu0273 | 0.5
qwertyu0274 | 0.5
qwertyu0275 | 0.5
qwertyu0276 | 0.5
qwertyu0277 | 0.5
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qwertyu0279 | 0.5
qwertyu0280 | 0.5
qwertyu0281 | 0.5
qwertyu0282 | 0.5
qwertyu0283 | 0.5
qwertyu0284 | 0.5
qwertyu0285 | 0.5
qwertyu0286 | 0.5
qwertyu0287 | 0.5
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qwertyu0290 | 0.5
qwertyu0291 | 0.5
qwertyu0292 | 0.5
qwertyu0293 | 0.5
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qwertyu0296 | 0.5
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qwertyu0299 | 0.5
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qwertyu0340 | 0.5
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qwertyu0487 | 0.5
qwertyu0489 | 0.5
qwertyu0490 | 0.5
qwertyu0491 | 0.5
qwertyu0492 | 0.5
qwertyu0493 | 0.5
qwertyu0494 | 0.5
qwertyu0495 | 0.5
qwertyu0496 | 0.5
qwertyu0497 | 0.5
qwertyu0498 | 0.5
qwertyu0499 | 0.5
qwertyu0500 | 0.5
qwertyu0501 | 0.5
qwertyu0502 | 0.5
qwertyu0503 | 0.5
qwertyu0504 | 0.5
qwertyu0505 | 0.5
qwertyu0506 | 0.5
qwertyu0507 | 0.5
qwertyu0508 | 0.5
qwertyu0509 | 0.5
qwertyu0510 | 0.5
qwertyu0511 | 0.5
qwertyu0512 | 0.5
qwertyu0513 | 0.5
qwertyu0514 | 0.5
qwertyu0515 | 0.5
qwertyu0516 | 0.5
qwertyu0517 | 0.5
qwertyu0518 | 0.5
qwertyu0519 | 0.5
qwertyu0520 | 0.5
qwertyu0521 | 0.5
qwertyu0522 | 0.5
qwertyu0523 | 0.5
qwertyu0524 | 0.5
qwertyu0525 | 0.5
qwertyu0526 | 0.5
qwertyu0527 | 0.5
qwertyu0528 | 0.5
qwertyu0529 | 0.5
qwertyu0530 | 0.5
qwertyu0531 | 0.5
qwertyu0532 | 0.5
qwertyu0533 | 0.5
qwertyu0534 | 0.5
qwertyu0535 | 0.5
qwertyu0536 | 0.5
qwertyu0537 | 0.5
qwertyu0538 | 0.5
qwertyu0539 | 0.5
qwertyu0540 | 0.5
qwertyu0541 | 0.5
qwertyu0542 | 0.5
qwertyu0543 | 0.5
qwertyu0544 | 0.5
qwertyu0545 | 0.5
qwertyu0546 | 0.5
qwertyu0547 | 0.5
qwertyu0548 | 0.5
qwertyu0549 | 0.5
qwertyu0550 | 0.5
qwertyu0551 | 0.5
qwertyu0552 | 0.5
qwertyu0553 | 0.5
qwertyu0554 | 0.5
qwertyu0555 | 0.5
qwertyu0556 | 0.5
qwertyu0557 | 0.5
qwertyu0558 | 0.5
qwertyu0559 | 0.5
qwertyu0560 | 0.5
qwertyu0561 | 0.5
qwertyu0562 | 0.5
qwertyu0563 | 0.5
qwertyu0564 | 0.5
qwertyu0565 | 0.5
qwertyu0566 | 0.5
qwertyu0567 | 0.5
qwertyu0568 | 0.5
qwertyu0569 | 0.5
qwertyu0570 | 0.5
qwertyu0571 | 0.5
qwertyu0572 | 0.5
qwertyu0573 | 0.5
qwertyu0574 | 0.5
qwertyu0575 | 0.5
qwertyu0576 | 0.5
qwertyu0577 | 0.5
qwertyu0578 | 0.5
qwertyu0579 | 0.5
qwertyu0580 | 0.5
qwertyu0581 | 0.5
qwertyu0582 | 0.5
qwertyu0583 | 0.5
qwertyu0584 | 0.5
qwertyu0585 | 0.5
qwertyu0586 | 0.5
qwertyu0587 | 0.5
qwertyu0589 | 0.5
qwertyu0590 | 0.5
qwertyu0591 | 0.5
qwertyu0592 | 0.5
qwertyu0593 | 0.5
qwertyu0594 | 0.5
qwertyu0595 | 0.5
qwertyu0596 | 0.5
qwertyu0597 | 0.5
qwertyu0598 | 0.5
qwertyu0599 | 0.5
qwertyu0600 | 0.5
qwertyu0601 | 0.5
qwertyu0602 | 0.5
qwertyu0603 | 0.5
qwertyu0604 | 0.5
qwertyu0605 | 0.5
qwertyu0606 | 0.5
qwertyu0607 | 0.5
qwertyu0608 | 0.5
qwertyu0609 | 0.5
qwertyu0610 | 0.5
qwertyu0611 | 0.5
qwertyu0612 | 0.5
qwertyu0613 | 0.5
qwertyu0614 | 0.5
qwertyu0615 | 0.5
qwertyu0616 | 0.5
qwertyu0617 | 0.5
qwertyu0618 | 0.5
qwertyu0619 | 0.5
qwertyu0620 | 0.5
qwertyu0621 | 0.5
qwertyu0622 | 0.5
qwertyu0623 | 0.5
qwertyu0624 | 0.5
qwertyu0625 | 0.5
qwertyu0626 | 0.5
qwertyu0627 | 0.5
qwertyu0628 | 0.5
qwertyu0629 | 0.5
qwertyu0630 | 0.5
qwertyu0631 | 0.5
qwertyu0632 | 0.5
qwertyu0633 | 0.5
qwertyu0634 | 0.5
qwertyu0635 | 0.5
qwertyu0636 | 0.5
qwertyu0637 | 0.5
qwertyu0638 | 0.5
qwertyu0639 | 0.5
qwertyu0640 | 0.5
qwertyu0641 | 0.5
qwertyu0642 | 0.5
qwertyu0643 | 0.5
qwertyu0644 | 0.5
qwertyu0645 | 0.5
qwertyu0646 | 0.5
qwertyu0647 | 0.5
qwertyu0648 | 0.5
qwertyu0649 | 0.5
qwertyu0650 | 0.5
qwertyu0651 | 0.5
qwertyu0652 | 0.5
qwertyu0653 | 0.5
qwertyu0654 | 0.5
qwertyu0655 | 0.5
qwertyu0656 | 0.5
qwertyu0657 | 0.5
qwertyu0658 | 0.5
qwertyu0659 | 0.5
qwertyu0660 | 0.5
qwertyu0661 | 0.5
qwertyu0662 | 0.5
qwertyu0663 | 0.5
qwertyu0664 | 0.5
qwertyu0665 | 0.5
qwertyu0666 | 0.5
qwertyu0667 | 0.5
qwertyu0668 | 0.5
qwertyu0669 | 0.5
qwertyu0670 | 0.5
qwertyu0671 | 0.5
qwertyu0672 | 0.5
qwertyu0673 | 0.5
qwertyu0674 | 0.5
qwertyu0675 | 0.5
qwertyu0676 | 0.5
qwertyu0677 | 0.5
qwertyu0678 | 0.5
qwertyu0679 | 0.5
qwertyu0680 | 0.5
qwertyu0681 | 0.5
qwertyu0682 | 0.5
qwertyu0683 | 0.5
qwertyu0684 | 0.5
qwertyu0685 | 0.5
qwertyu0686 | 0.5
qwertyu0687 | 0.5
qwertyu0689 | 0.5
qwertyu0690 | 0.5
qwertyu0691 | 0.5
qwertyu0692 | 0.5
qwertyu0693 | 0.5
qwertyu0694 | 0.5
qwertyu0695 | 0.5
qwertyu0696 | 0.5
qwertyu0697 | 0.5
qwertyu0698 | 0.5
qwertyu0699 | 0.5
qwertyu0700 | 0.5
qwertyu0701 | 0.5
qwertyu0702 | 0.5
qwertyu0703 | 0.5
qwertyu0704 | 0.5
qwertyu0705 | 0.5
qwertyu0706 | 0.5
qwertyu0707 | 0.5
qwertyu0708 | 0.5
qwertyu0709 | 0.5
qwertyu0710 | 0.5
qwertyu0711 | 0.5
qwertyu0712 | 0.5
qwertyu0713 | 0.5
qwertyu0714 | 0.5
qwertyu0715 | 0.5
qwertyu0716 | 0.5
qwertyu0717 | 0.5
qwertyu0718 | 0.5
qwertyu0719 | 0.5
qwertyu0720 | 0.5
qwertyu0721 | 0.5
qwertyu0722 | 0.5
qwertyu0723 | 0.5
qwertyu0724 | 0.5
qwertyu0725 | 0.5
qwertyu0726 | 0.5
qwertyu0727 | 0.5
qwertyu0728 | 0.5
qwertyu0729 | 0.5
qwertyu0730 | 0.5
qwertyu0731 | 0.5
qwertyu0732 | 0.5
qwertyu0733 | 0.5
qwertyu0734 | 0.5
qwertyu0735 | 0.5
qwertyu0736 | 0.5
qwertyu0737 | 0.5
qwertyu0738 | 0.5
qwertyu0739 | 0.5
qwertyu0740 | 0.5
qwertyu0741 | 0.5
qwertyu0742 | 0.5
qwertyu0743 | 0.5
qwertyu0744 | 0.5
qwertyu0745 | 0.5
qwertyu0746 | 0.5
qwertyu0747 | 0.5
qwertyu0748 | 0.5
qwertyu0749 | 0.5
qwertyu0750 | 0.5
qwertyu0751 | 0.5
qwertyu0752 | 0.5
qwertyu0753 | 0.5
qwertyu0754 | 0.5
qwertyu0755 | 0.5
qwertyu0756 | 0.5
qwertyu0757 | 0.5
qwertyu0758 | 0.5
qwertyu0759 | 0.5
qwertyu0760 | 0.5
qwertyu0761 | 0.5
qwertyu0762 | 0.5
qwertyu0763 | 0.5
qwertyu0764 | 0.5
qwertyu0765 | 0.5
qwertyu0766 | 0.5
qwertyu0767 | 0.5
qwertyu0768 | 0.5
qwertyu0769 | 0.5
qwertyu0770 | 0.5
qwertyu0771 | 0.5
qwertyu0772 | 0.5
qwertyu0773 | 0.5
qwertyu0774 | 0.5
qwertyu0775 | 0.5
qwertyu0776 | 0.5
qwertyu0777 | 0.5
qwertyu0778 | 0.5
qwertyu0779 | 0.5
qwertyu0780 | 0.5
qwertyu0781 | 0.5
qwertyu0782 | 0.5
qwertyu0783 | 0.5
qwertyu0784 | 0.5
qwertyu0785 | 0.5
qwertyu0786 | 0.5
qwertyu0787 | 0.5
qwertyu0789 | 0.5
qwertyu0790 | 0.5
qwertyu0791 | 0.5
qwertyu0792 | 0.5
qwertyu0793 | 0.5
qwertyu0794 | 0.5
qwertyu0795 | 0.5
qwertyu0796 | 0.5
qwertyu0797 | 0.5
qwertyu0798 | 0.5
qwertyu0799 | 0.5
qwertyu0800 | 0.5
qwertyu0801 | 0.5
qwertyu0802 | 0.5
qwertyu0803 | 0.5
qwertyu0804 | 0.5
qwertyu0805 | 0.5
qwertyu0806 | 0.5
qwertyu0807 | 0.5
qwertyu0808 | 0.5
qwertyu0809 | 0.5
qwertyu0810 | 0.5
qwertyu0811 | 0.5
qwertyu0812 | 0.5
qwertyu0813 | 0.5
qwertyu0814 | 0.5
qwertyu0815 | 0.5
qwertyu0816 | 0.5
qwertyu0817 | 0.5
qwertyu0818 | 0.5
qwertyu0819 | 0.5
qwertyu0820 | 0.5
qwertyu0821 | 0.5
qwertyu0822 | 0.5
qwertyu0823 | 0.5
qwertyu0824 | 0.5
qwertyu0825 | 0.5
qwertyu0826 | 0.5
qwertyu0827 | 0.5
qwertyu0828 | 0.5
qwertyu0829 | 0.5
qwertyu0830 | 0.5
qwertyu0831 | 0.5
qwertyu0832 | 0.5
qwertyu0833 | 0.5
qwertyu0834 | 0.5
qwertyu0835 | 0.5
qwertyu0836 | 0.5
qwertyu0837 | 0.5
qwertyu0838 | 0.5
qwertyu0839 | 0.5
qwertyu0840 | 0.5
qwertyu0841 | 0.5
qwertyu0842 | 0.5
qwertyu0843 | 0.5
qwertyu0844 | 0.5
qwertyu0845 | 0.5
qwertyu0846 | 0.5
qwertyu0847 | 0.5
qwertyu0848 | 0.5
qwertyu0849 | 0.5
qwertyu0850 | 0.5
qwertyu0851 | 0.5
qwertyu0852 | 0.5
qwertyu0853 | 0.5
qwertyu0854 | 0.5
qwertyu0855 | 0.5
qwertyu0856 | 0.5
qwertyu0857 | 0.5
qwertyu0858 | 0.5
qwertyu0859 | 0.5
qwertyu0860 | 0.5
qwertyu0861 | 0.5
qwertyu0862 | 0.5
qwertyu0863 | 0.5
qwertyu0864 | 0.5
qwertyu0865 | 0.5
qwertyu0866 | 0.5
qwertyu0867 | 0.5
qwertyu0868 | 0.5
qwertyu0869 | 0.5
qwertyu0870 | 0.5
qwertyu0871 | 0.5
qwertyu0872 | 0.5
qwertyu0873 | 0.5
qwertyu0874 | 0.5
qwertyu0875 | 0.5
qwertyu0876 | 0.5
qwertyu0877 | 0.5
qwertyu0878 | 0.5
qwertyu0879 | 0.5
qwertyu0880 | 0.5
qwertyu0881 | 0.5
qwertyu0882 | 0.5
qwertyu0883 | 0.5
qwertyu0884 | 0.5
qwertyu0885 | 0.5
qwertyu0886 | 0.5
qwertyu0887 | 0.5
qwertyu0889 | 0.5
qwertyu0890 | 0.5
qwertyu0891 | 0.5
qwertyu0892 | 0.5
qwertyu0893 | 0.5
qwertyu0894 | 0.5
qwertyu0895 | 0.5
qwertyu0896 | 0.5
qwertyu0897 | 0.5
qwertyu0898 | 0.5
qwertyu0899 | 0.5
qwertyu1000 | 0.411765
(1000 rows)
select t,similarity(t,'gwertyu0988') as sml from test_trgm where t % 'gwertyu0988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 0.6
qwertyu0980 | 0.411765
qwertyu0981 | 0.411765
qwertyu0982 | 0.411765
qwertyu0983 | 0.411765
qwertyu0984 | 0.411765
qwertyu0985 | 0.411765
qwertyu0986 | 0.411765
qwertyu0987 | 0.411765
qwertyu0989 | 0.411765
qwertyu0088 | 0.333333
qwertyu0098 | 0.333333
qwertyu0188 | 0.333333
qwertyu0288 | 0.333333
qwertyu0388 | 0.333333
qwertyu0488 | 0.333333
qwertyu0588 | 0.333333
qwertyu0688 | 0.333333
qwertyu0788 | 0.333333
qwertyu0888 | 0.333333
qwertyu0900 | 0.333333
qwertyu0901 | 0.333333
qwertyu0902 | 0.333333
qwertyu0903 | 0.333333
qwertyu0904 | 0.333333
qwertyu0905 | 0.333333
qwertyu0906 | 0.333333
qwertyu0907 | 0.333333
qwertyu0908 | 0.333333
qwertyu0909 | 0.333333
qwertyu0910 | 0.333333
qwertyu0911 | 0.333333
qwertyu0912 | 0.333333
qwertyu0913 | 0.333333
qwertyu0914 | 0.333333
qwertyu0915 | 0.333333
qwertyu0916 | 0.333333
qwertyu0917 | 0.333333
qwertyu0918 | 0.333333
qwertyu0919 | 0.333333
qwertyu0920 | 0.333333
qwertyu0921 | 0.333333
qwertyu0922 | 0.333333
qwertyu0923 | 0.333333
qwertyu0924 | 0.333333
qwertyu0925 | 0.333333
qwertyu0926 | 0.333333
qwertyu0927 | 0.333333
qwertyu0928 | 0.333333
qwertyu0929 | 0.333333
qwertyu0930 | 0.333333
qwertyu0931 | 0.333333
qwertyu0932 | 0.333333
qwertyu0933 | 0.333333
qwertyu0934 | 0.333333
qwertyu0935 | 0.333333
qwertyu0936 | 0.333333
qwertyu0937 | 0.333333
qwertyu0938 | 0.333333
qwertyu0939 | 0.333333
qwertyu0940 | 0.333333
qwertyu0941 | 0.333333
qwertyu0942 | 0.333333
qwertyu0943 | 0.333333
qwertyu0944 | 0.333333
qwertyu0945 | 0.333333
qwertyu0946 | 0.333333
qwertyu0947 | 0.333333
qwertyu0948 | 0.333333
qwertyu0949 | 0.333333
qwertyu0950 | 0.333333
qwertyu0951 | 0.333333
qwertyu0952 | 0.333333
qwertyu0953 | 0.333333
qwertyu0954 | 0.333333
qwertyu0955 | 0.333333
qwertyu0956 | 0.333333
qwertyu0957 | 0.333333
qwertyu0958 | 0.333333
qwertyu0959 | 0.333333
qwertyu0960 | 0.333333
qwertyu0961 | 0.333333
qwertyu0962 | 0.333333
qwertyu0963 | 0.333333
qwertyu0964 | 0.333333
qwertyu0965 | 0.333333
qwertyu0966 | 0.333333
qwertyu0967 | 0.333333
qwertyu0968 | 0.333333
qwertyu0969 | 0.333333
qwertyu0970 | 0.333333
qwertyu0971 | 0.333333
qwertyu0972 | 0.333333
qwertyu0973 | 0.333333
qwertyu0974 | 0.333333
qwertyu0975 | 0.333333
qwertyu0976 | 0.333333
qwertyu0977 | 0.333333
qwertyu0978 | 0.333333
qwertyu0979 | 0.333333
qwertyu0990 | 0.333333
qwertyu0991 | 0.333333
qwertyu0992 | 0.333333
qwertyu0993 | 0.333333
qwertyu0994 | 0.333333
qwertyu0995 | 0.333333
qwertyu0996 | 0.333333
qwertyu0997 | 0.333333
qwertyu0998 | 0.333333
qwertyu0999 | 0.333333
(110 rows)
select t,similarity(t,'gwertyu1988') as sml from test_trgm where t % 'gwertyu1988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 0.333333
(1 row)
select t <-> 'q0987wertyu0988', t from test_trgm order by t <-> 'q0987wertyu0988' limit 2;
?column? | t
----------+-------------
0.411765 | qwertyu0988
0.5 | qwertyu0987
(2 rows)
select count(*) from test_trgm where t ~ '[qwerty]{2}-?[qwerty]{2}';
count
-------
1000
(1 row)
create index trgm_idx on test_trgm using gist (t gist_trgm_ops);
set enable_seqscan=off;
select t,similarity(t,'qwertyu0988') as sml from test_trgm where t % 'qwertyu0988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 1
qwertyu0980 | 0.714286
qwertyu0981 | 0.714286
qwertyu0982 | 0.714286
qwertyu0983 | 0.714286
qwertyu0984 | 0.714286
qwertyu0985 | 0.714286
qwertyu0986 | 0.714286
qwertyu0987 | 0.714286
qwertyu0989 | 0.714286
qwertyu0088 | 0.6
qwertyu0098 | 0.6
qwertyu0188 | 0.6
qwertyu0288 | 0.6
qwertyu0388 | 0.6
qwertyu0488 | 0.6
qwertyu0588 | 0.6
qwertyu0688 | 0.6
qwertyu0788 | 0.6
qwertyu0888 | 0.6
qwertyu0900 | 0.6
qwertyu0901 | 0.6
qwertyu0902 | 0.6
qwertyu0903 | 0.6
qwertyu0904 | 0.6
qwertyu0905 | 0.6
qwertyu0906 | 0.6
qwertyu0907 | 0.6
qwertyu0908 | 0.6
qwertyu0909 | 0.6
qwertyu0910 | 0.6
qwertyu0911 | 0.6
qwertyu0912 | 0.6
qwertyu0913 | 0.6
qwertyu0914 | 0.6
qwertyu0915 | 0.6
qwertyu0916 | 0.6
qwertyu0917 | 0.6
qwertyu0918 | 0.6
qwertyu0919 | 0.6
qwertyu0920 | 0.6
qwertyu0921 | 0.6
qwertyu0922 | 0.6
qwertyu0923 | 0.6
qwertyu0924 | 0.6
qwertyu0925 | 0.6
qwertyu0926 | 0.6
qwertyu0927 | 0.6
qwertyu0928 | 0.6
qwertyu0929 | 0.6
qwertyu0930 | 0.6
qwertyu0931 | 0.6
qwertyu0932 | 0.6
qwertyu0933 | 0.6
qwertyu0934 | 0.6
qwertyu0935 | 0.6
qwertyu0936 | 0.6
qwertyu0937 | 0.6
qwertyu0938 | 0.6
qwertyu0939 | 0.6
qwertyu0940 | 0.6
qwertyu0941 | 0.6
qwertyu0942 | 0.6
qwertyu0943 | 0.6
qwertyu0944 | 0.6
qwertyu0945 | 0.6
qwertyu0946 | 0.6
qwertyu0947 | 0.6
qwertyu0948 | 0.6
qwertyu0949 | 0.6
qwertyu0950 | 0.6
qwertyu0951 | 0.6
qwertyu0952 | 0.6
qwertyu0953 | 0.6
qwertyu0954 | 0.6
qwertyu0955 | 0.6
qwertyu0956 | 0.6
qwertyu0957 | 0.6
qwertyu0958 | 0.6
qwertyu0959 | 0.6
qwertyu0960 | 0.6
qwertyu0961 | 0.6
qwertyu0962 | 0.6
qwertyu0963 | 0.6
qwertyu0964 | 0.6
qwertyu0965 | 0.6
qwertyu0966 | 0.6
qwertyu0967 | 0.6
qwertyu0968 | 0.6
qwertyu0969 | 0.6
qwertyu0970 | 0.6
qwertyu0971 | 0.6
qwertyu0972 | 0.6
qwertyu0973 | 0.6
qwertyu0974 | 0.6
qwertyu0975 | 0.6
qwertyu0976 | 0.6
qwertyu0977 | 0.6
qwertyu0978 | 0.6
qwertyu0979 | 0.6
qwertyu0990 | 0.6
qwertyu0991 | 0.6
qwertyu0992 | 0.6
qwertyu0993 | 0.6
qwertyu0994 | 0.6
qwertyu0995 | 0.6
qwertyu0996 | 0.6
qwertyu0997 | 0.6
qwertyu0998 | 0.6
qwertyu0999 | 0.6
qwertyu0001 | 0.5
qwertyu0002 | 0.5
qwertyu0003 | 0.5
qwertyu0004 | 0.5
qwertyu0005 | 0.5
qwertyu0006 | 0.5
qwertyu0007 | 0.5
qwertyu0008 | 0.5
qwertyu0009 | 0.5
qwertyu0010 | 0.5
qwertyu0011 | 0.5
qwertyu0012 | 0.5
qwertyu0013 | 0.5
qwertyu0014 | 0.5
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qwertyu0707 | 0.5
qwertyu0708 | 0.5
qwertyu0709 | 0.5
qwertyu0710 | 0.5
qwertyu0711 | 0.5
qwertyu0712 | 0.5
qwertyu0713 | 0.5
qwertyu0714 | 0.5
qwertyu0715 | 0.5
qwertyu0716 | 0.5
qwertyu0717 | 0.5
qwertyu0718 | 0.5
qwertyu0719 | 0.5
qwertyu0720 | 0.5
qwertyu0721 | 0.5
qwertyu0722 | 0.5
qwertyu0723 | 0.5
qwertyu0724 | 0.5
qwertyu0725 | 0.5
qwertyu0726 | 0.5
qwertyu0727 | 0.5
qwertyu0728 | 0.5
qwertyu0729 | 0.5
qwertyu0730 | 0.5
qwertyu0731 | 0.5
qwertyu0732 | 0.5
qwertyu0733 | 0.5
qwertyu0734 | 0.5
qwertyu0735 | 0.5
qwertyu0736 | 0.5
qwertyu0737 | 0.5
qwertyu0738 | 0.5
qwertyu0739 | 0.5
qwertyu0740 | 0.5
qwertyu0741 | 0.5
qwertyu0742 | 0.5
qwertyu0743 | 0.5
qwertyu0744 | 0.5
qwertyu0745 | 0.5
qwertyu0746 | 0.5
qwertyu0747 | 0.5
qwertyu0748 | 0.5
qwertyu0749 | 0.5
qwertyu0750 | 0.5
qwertyu0751 | 0.5
qwertyu0752 | 0.5
qwertyu0753 | 0.5
qwertyu0754 | 0.5
qwertyu0755 | 0.5
qwertyu0756 | 0.5
qwertyu0757 | 0.5
qwertyu0758 | 0.5
qwertyu0759 | 0.5
qwertyu0760 | 0.5
qwertyu0761 | 0.5
qwertyu0762 | 0.5
qwertyu0763 | 0.5
qwertyu0764 | 0.5
qwertyu0765 | 0.5
qwertyu0766 | 0.5
qwertyu0767 | 0.5
qwertyu0768 | 0.5
qwertyu0769 | 0.5
qwertyu0770 | 0.5
qwertyu0771 | 0.5
qwertyu0772 | 0.5
qwertyu0773 | 0.5
qwertyu0774 | 0.5
qwertyu0775 | 0.5
qwertyu0776 | 0.5
qwertyu0777 | 0.5
qwertyu0778 | 0.5
qwertyu0779 | 0.5
qwertyu0780 | 0.5
qwertyu0781 | 0.5
qwertyu0782 | 0.5
qwertyu0783 | 0.5
qwertyu0784 | 0.5
qwertyu0785 | 0.5
qwertyu0786 | 0.5
qwertyu0787 | 0.5
qwertyu0789 | 0.5
qwertyu0790 | 0.5
qwertyu0791 | 0.5
qwertyu0792 | 0.5
qwertyu0793 | 0.5
qwertyu0794 | 0.5
qwertyu0795 | 0.5
qwertyu0796 | 0.5
qwertyu0797 | 0.5
qwertyu0798 | 0.5
qwertyu0799 | 0.5
qwertyu0800 | 0.5
qwertyu0801 | 0.5
qwertyu0802 | 0.5
qwertyu0803 | 0.5
qwertyu0804 | 0.5
qwertyu0805 | 0.5
qwertyu0806 | 0.5
qwertyu0807 | 0.5
qwertyu0808 | 0.5
qwertyu0809 | 0.5
qwertyu0810 | 0.5
qwertyu0811 | 0.5
qwertyu0812 | 0.5
qwertyu0813 | 0.5
qwertyu0814 | 0.5
qwertyu0815 | 0.5
qwertyu0816 | 0.5
qwertyu0817 | 0.5
qwertyu0818 | 0.5
qwertyu0819 | 0.5
qwertyu0820 | 0.5
qwertyu0821 | 0.5
qwertyu0822 | 0.5
qwertyu0823 | 0.5
qwertyu0824 | 0.5
qwertyu0825 | 0.5
qwertyu0826 | 0.5
qwertyu0827 | 0.5
qwertyu0828 | 0.5
qwertyu0829 | 0.5
qwertyu0830 | 0.5
qwertyu0831 | 0.5
qwertyu0832 | 0.5
qwertyu0833 | 0.5
qwertyu0834 | 0.5
qwertyu0835 | 0.5
qwertyu0836 | 0.5
qwertyu0837 | 0.5
qwertyu0838 | 0.5
qwertyu0839 | 0.5
qwertyu0840 | 0.5
qwertyu0841 | 0.5
qwertyu0842 | 0.5
qwertyu0843 | 0.5
qwertyu0844 | 0.5
qwertyu0845 | 0.5
qwertyu0846 | 0.5
qwertyu0847 | 0.5
qwertyu0848 | 0.5
qwertyu0849 | 0.5
qwertyu0850 | 0.5
qwertyu0851 | 0.5
qwertyu0852 | 0.5
qwertyu0853 | 0.5
qwertyu0854 | 0.5
qwertyu0855 | 0.5
qwertyu0856 | 0.5
qwertyu0857 | 0.5
qwertyu0858 | 0.5
qwertyu0859 | 0.5
qwertyu0860 | 0.5
qwertyu0861 | 0.5
qwertyu0862 | 0.5
qwertyu0863 | 0.5
qwertyu0864 | 0.5
qwertyu0865 | 0.5
qwertyu0866 | 0.5
qwertyu0867 | 0.5
qwertyu0868 | 0.5
qwertyu0869 | 0.5
qwertyu0870 | 0.5
qwertyu0871 | 0.5
qwertyu0872 | 0.5
qwertyu0873 | 0.5
qwertyu0874 | 0.5
qwertyu0875 | 0.5
qwertyu0876 | 0.5
qwertyu0877 | 0.5
qwertyu0878 | 0.5
qwertyu0879 | 0.5
qwertyu0880 | 0.5
qwertyu0881 | 0.5
qwertyu0882 | 0.5
qwertyu0883 | 0.5
qwertyu0884 | 0.5
qwertyu0885 | 0.5
qwertyu0886 | 0.5
qwertyu0887 | 0.5
qwertyu0889 | 0.5
qwertyu0890 | 0.5
qwertyu0891 | 0.5
qwertyu0892 | 0.5
qwertyu0893 | 0.5
qwertyu0894 | 0.5
qwertyu0895 | 0.5
qwertyu0896 | 0.5
qwertyu0897 | 0.5
qwertyu0898 | 0.5
qwertyu0899 | 0.5
qwertyu1000 | 0.411765
(1000 rows)
select t,similarity(t,'gwertyu0988') as sml from test_trgm where t % 'gwertyu0988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 0.6
qwertyu0980 | 0.411765
qwertyu0981 | 0.411765
qwertyu0982 | 0.411765
qwertyu0983 | 0.411765
qwertyu0984 | 0.411765
qwertyu0985 | 0.411765
qwertyu0986 | 0.411765
qwertyu0987 | 0.411765
qwertyu0989 | 0.411765
qwertyu0088 | 0.333333
qwertyu0098 | 0.333333
qwertyu0188 | 0.333333
qwertyu0288 | 0.333333
qwertyu0388 | 0.333333
qwertyu0488 | 0.333333
qwertyu0588 | 0.333333
qwertyu0688 | 0.333333
qwertyu0788 | 0.333333
qwertyu0888 | 0.333333
qwertyu0900 | 0.333333
qwertyu0901 | 0.333333
qwertyu0902 | 0.333333
qwertyu0903 | 0.333333
qwertyu0904 | 0.333333
qwertyu0905 | 0.333333
qwertyu0906 | 0.333333
qwertyu0907 | 0.333333
qwertyu0908 | 0.333333
qwertyu0909 | 0.333333
qwertyu0910 | 0.333333
qwertyu0911 | 0.333333
qwertyu0912 | 0.333333
qwertyu0913 | 0.333333
qwertyu0914 | 0.333333
qwertyu0915 | 0.333333
qwertyu0916 | 0.333333
qwertyu0917 | 0.333333
qwertyu0918 | 0.333333
qwertyu0919 | 0.333333
qwertyu0920 | 0.333333
qwertyu0921 | 0.333333
qwertyu0922 | 0.333333
qwertyu0923 | 0.333333
qwertyu0924 | 0.333333
qwertyu0925 | 0.333333
qwertyu0926 | 0.333333
qwertyu0927 | 0.333333
qwertyu0928 | 0.333333
qwertyu0929 | 0.333333
qwertyu0930 | 0.333333
qwertyu0931 | 0.333333
qwertyu0932 | 0.333333
qwertyu0933 | 0.333333
qwertyu0934 | 0.333333
qwertyu0935 | 0.333333
qwertyu0936 | 0.333333
qwertyu0937 | 0.333333
qwertyu0938 | 0.333333
qwertyu0939 | 0.333333
qwertyu0940 | 0.333333
qwertyu0941 | 0.333333
qwertyu0942 | 0.333333
qwertyu0943 | 0.333333
qwertyu0944 | 0.333333
qwertyu0945 | 0.333333
qwertyu0946 | 0.333333
qwertyu0947 | 0.333333
qwertyu0948 | 0.333333
qwertyu0949 | 0.333333
qwertyu0950 | 0.333333
qwertyu0951 | 0.333333
qwertyu0952 | 0.333333
qwertyu0953 | 0.333333
qwertyu0954 | 0.333333
qwertyu0955 | 0.333333
qwertyu0956 | 0.333333
qwertyu0957 | 0.333333
qwertyu0958 | 0.333333
qwertyu0959 | 0.333333
qwertyu0960 | 0.333333
qwertyu0961 | 0.333333
qwertyu0962 | 0.333333
qwertyu0963 | 0.333333
qwertyu0964 | 0.333333
qwertyu0965 | 0.333333
qwertyu0966 | 0.333333
qwertyu0967 | 0.333333
qwertyu0968 | 0.333333
qwertyu0969 | 0.333333
qwertyu0970 | 0.333333
qwertyu0971 | 0.333333
qwertyu0972 | 0.333333
qwertyu0973 | 0.333333
qwertyu0974 | 0.333333
qwertyu0975 | 0.333333
qwertyu0976 | 0.333333
qwertyu0977 | 0.333333
qwertyu0978 | 0.333333
qwertyu0979 | 0.333333
qwertyu0990 | 0.333333
qwertyu0991 | 0.333333
qwertyu0992 | 0.333333
qwertyu0993 | 0.333333
qwertyu0994 | 0.333333
qwertyu0995 | 0.333333
qwertyu0996 | 0.333333
qwertyu0997 | 0.333333
qwertyu0998 | 0.333333
qwertyu0999 | 0.333333
(110 rows)
select t,similarity(t,'gwertyu1988') as sml from test_trgm where t % 'gwertyu1988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 0.333333
(1 row)
explain (costs off)
select t <-> 'q0987wertyu0988', t from test_trgm order by t <-> 'q0987wertyu0988' limit 2;
QUERY PLAN
---------------------------------------------------
Limit
-> Index Scan using trgm_idx on test_trgm
Order By: (t <-> 'q0987wertyu0988'::text)
(3 rows)
select t <-> 'q0987wertyu0988', t from test_trgm order by t <-> 'q0987wertyu0988' limit 2;
?column? | t
----------+-------------
0.411765 | qwertyu0988
0.5 | qwertyu0987
(2 rows)
select count(*) from test_trgm where t ~ '[qwerty]{2}-?[qwerty]{2}';
count
-------
1000
(1 row)
drop index trgm_idx;
create index trgm_idx on test_trgm using gist (t gist_trgm_ops(siglen=0));
ERROR: value 0 out of bounds for option "siglen"
DETAIL: Valid values are between "1" and "2024".
create index trgm_idx on test_trgm using gist (t gist_trgm_ops(siglen=2025));
ERROR: value 2025 out of bounds for option "siglen"
DETAIL: Valid values are between "1" and "2024".
create index trgm_idx on test_trgm using gist (t gist_trgm_ops(siglen=2024));
set enable_seqscan=off;
select t,similarity(t,'qwertyu0988') as sml from test_trgm where t % 'qwertyu0988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 1
qwertyu0980 | 0.714286
qwertyu0981 | 0.714286
qwertyu0982 | 0.714286
qwertyu0983 | 0.714286
qwertyu0984 | 0.714286
qwertyu0985 | 0.714286
qwertyu0986 | 0.714286
qwertyu0987 | 0.714286
qwertyu0989 | 0.714286
qwertyu0088 | 0.6
qwertyu0098 | 0.6
qwertyu0188 | 0.6
qwertyu0288 | 0.6
qwertyu0388 | 0.6
qwertyu0488 | 0.6
qwertyu0588 | 0.6
qwertyu0688 | 0.6
qwertyu0788 | 0.6
qwertyu0888 | 0.6
qwertyu0900 | 0.6
qwertyu0901 | 0.6
qwertyu0902 | 0.6
qwertyu0903 | 0.6
qwertyu0904 | 0.6
qwertyu0905 | 0.6
qwertyu0906 | 0.6
qwertyu0907 | 0.6
qwertyu0908 | 0.6
qwertyu0909 | 0.6
qwertyu0910 | 0.6
qwertyu0911 | 0.6
qwertyu0912 | 0.6
qwertyu0913 | 0.6
qwertyu0914 | 0.6
qwertyu0915 | 0.6
qwertyu0916 | 0.6
qwertyu0917 | 0.6
qwertyu0918 | 0.6
qwertyu0919 | 0.6
qwertyu0920 | 0.6
qwertyu0921 | 0.6
qwertyu0922 | 0.6
qwertyu0923 | 0.6
qwertyu0924 | 0.6
qwertyu0925 | 0.6
qwertyu0926 | 0.6
qwertyu0927 | 0.6
qwertyu0928 | 0.6
qwertyu0929 | 0.6
qwertyu0930 | 0.6
qwertyu0931 | 0.6
qwertyu0932 | 0.6
qwertyu0933 | 0.6
qwertyu0934 | 0.6
qwertyu0935 | 0.6
qwertyu0936 | 0.6
qwertyu0937 | 0.6
qwertyu0938 | 0.6
qwertyu0939 | 0.6
qwertyu0940 | 0.6
qwertyu0941 | 0.6
qwertyu0942 | 0.6
qwertyu0943 | 0.6
qwertyu0944 | 0.6
qwertyu0945 | 0.6
qwertyu0946 | 0.6
qwertyu0947 | 0.6
qwertyu0948 | 0.6
qwertyu0949 | 0.6
qwertyu0950 | 0.6
qwertyu0951 | 0.6
qwertyu0952 | 0.6
qwertyu0953 | 0.6
qwertyu0954 | 0.6
qwertyu0955 | 0.6
qwertyu0956 | 0.6
qwertyu0957 | 0.6
qwertyu0958 | 0.6
qwertyu0959 | 0.6
qwertyu0960 | 0.6
qwertyu0961 | 0.6
qwertyu0962 | 0.6
qwertyu0963 | 0.6
qwertyu0964 | 0.6
qwertyu0965 | 0.6
qwertyu0966 | 0.6
qwertyu0967 | 0.6
qwertyu0968 | 0.6
qwertyu0969 | 0.6
qwertyu0970 | 0.6
qwertyu0971 | 0.6
qwertyu0972 | 0.6
qwertyu0973 | 0.6
qwertyu0974 | 0.6
qwertyu0975 | 0.6
qwertyu0976 | 0.6
qwertyu0977 | 0.6
qwertyu0978 | 0.6
qwertyu0979 | 0.6
qwertyu0990 | 0.6
qwertyu0991 | 0.6
qwertyu0992 | 0.6
qwertyu0993 | 0.6
qwertyu0994 | 0.6
qwertyu0995 | 0.6
qwertyu0996 | 0.6
qwertyu0997 | 0.6
qwertyu0998 | 0.6
qwertyu0999 | 0.6
qwertyu0001 | 0.5
qwertyu0002 | 0.5
qwertyu0003 | 0.5
qwertyu0004 | 0.5
qwertyu0005 | 0.5
qwertyu0006 | 0.5
qwertyu0007 | 0.5
qwertyu0008 | 0.5
qwertyu0009 | 0.5
qwertyu0010 | 0.5
qwertyu0011 | 0.5
qwertyu0012 | 0.5
qwertyu0013 | 0.5
qwertyu0014 | 0.5
qwertyu0015 | 0.5
qwertyu0016 | 0.5
qwertyu0017 | 0.5
qwertyu0018 | 0.5
qwertyu0019 | 0.5
qwertyu0020 | 0.5
qwertyu0021 | 0.5
qwertyu0022 | 0.5
qwertyu0023 | 0.5
qwertyu0024 | 0.5
qwertyu0025 | 0.5
qwertyu0026 | 0.5
qwertyu0027 | 0.5
qwertyu0028 | 0.5
qwertyu0029 | 0.5
qwertyu0030 | 0.5
qwertyu0031 | 0.5
qwertyu0032 | 0.5
qwertyu0033 | 0.5
qwertyu0034 | 0.5
qwertyu0035 | 0.5
qwertyu0036 | 0.5
qwertyu0037 | 0.5
qwertyu0038 | 0.5
qwertyu0039 | 0.5
qwertyu0040 | 0.5
qwertyu0041 | 0.5
qwertyu0042 | 0.5
qwertyu0043 | 0.5
qwertyu0044 | 0.5
qwertyu0045 | 0.5
qwertyu0046 | 0.5
qwertyu0047 | 0.5
qwertyu0048 | 0.5
qwertyu0049 | 0.5
qwertyu0050 | 0.5
qwertyu0051 | 0.5
qwertyu0052 | 0.5
qwertyu0053 | 0.5
qwertyu0054 | 0.5
qwertyu0055 | 0.5
qwertyu0056 | 0.5
qwertyu0057 | 0.5
qwertyu0058 | 0.5
qwertyu0059 | 0.5
qwertyu0060 | 0.5
qwertyu0061 | 0.5
qwertyu0062 | 0.5
qwertyu0063 | 0.5
qwertyu0064 | 0.5
qwertyu0065 | 0.5
qwertyu0066 | 0.5
qwertyu0067 | 0.5
qwertyu0068 | 0.5
qwertyu0069 | 0.5
qwertyu0070 | 0.5
qwertyu0071 | 0.5
qwertyu0072 | 0.5
qwertyu0073 | 0.5
qwertyu0074 | 0.5
qwertyu0075 | 0.5
qwertyu0076 | 0.5
qwertyu0077 | 0.5
qwertyu0078 | 0.5
qwertyu0079 | 0.5
qwertyu0080 | 0.5
qwertyu0081 | 0.5
qwertyu0082 | 0.5
qwertyu0083 | 0.5
qwertyu0084 | 0.5
qwertyu0085 | 0.5
qwertyu0086 | 0.5
qwertyu0087 | 0.5
qwertyu0089 | 0.5
qwertyu0090 | 0.5
qwertyu0091 | 0.5
qwertyu0092 | 0.5
qwertyu0093 | 0.5
qwertyu0094 | 0.5
qwertyu0095 | 0.5
qwertyu0096 | 0.5
qwertyu0097 | 0.5
qwertyu0099 | 0.5
qwertyu0100 | 0.5
qwertyu0101 | 0.5
qwertyu0102 | 0.5
qwertyu0103 | 0.5
qwertyu0104 | 0.5
qwertyu0105 | 0.5
qwertyu0106 | 0.5
qwertyu0107 | 0.5
qwertyu0108 | 0.5
qwertyu0109 | 0.5
qwertyu0110 | 0.5
qwertyu0111 | 0.5
qwertyu0112 | 0.5
qwertyu0113 | 0.5
qwertyu0114 | 0.5
qwertyu0115 | 0.5
qwertyu0116 | 0.5
qwertyu0117 | 0.5
qwertyu0118 | 0.5
qwertyu0119 | 0.5
qwertyu0120 | 0.5
qwertyu0121 | 0.5
qwertyu0122 | 0.5
qwertyu0123 | 0.5
qwertyu0124 | 0.5
qwertyu0125 | 0.5
qwertyu0126 | 0.5
qwertyu0127 | 0.5
qwertyu0128 | 0.5
qwertyu0129 | 0.5
qwertyu0130 | 0.5
qwertyu0131 | 0.5
qwertyu0132 | 0.5
qwertyu0133 | 0.5
qwertyu0134 | 0.5
qwertyu0135 | 0.5
qwertyu0136 | 0.5
qwertyu0137 | 0.5
qwertyu0138 | 0.5
qwertyu0139 | 0.5
qwertyu0140 | 0.5
qwertyu0141 | 0.5
qwertyu0142 | 0.5
qwertyu0143 | 0.5
qwertyu0144 | 0.5
qwertyu0145 | 0.5
qwertyu0146 | 0.5
qwertyu0147 | 0.5
qwertyu0148 | 0.5
qwertyu0149 | 0.5
qwertyu0150 | 0.5
qwertyu0151 | 0.5
qwertyu0152 | 0.5
qwertyu0153 | 0.5
qwertyu0154 | 0.5
qwertyu0155 | 0.5
qwertyu0156 | 0.5
qwertyu0157 | 0.5
qwertyu0158 | 0.5
qwertyu0159 | 0.5
qwertyu0160 | 0.5
qwertyu0161 | 0.5
qwertyu0162 | 0.5
qwertyu0163 | 0.5
qwertyu0164 | 0.5
qwertyu0165 | 0.5
qwertyu0166 | 0.5
qwertyu0167 | 0.5
qwertyu0168 | 0.5
qwertyu0169 | 0.5
qwertyu0170 | 0.5
qwertyu0171 | 0.5
qwertyu0172 | 0.5
qwertyu0173 | 0.5
qwertyu0174 | 0.5
qwertyu0175 | 0.5
qwertyu0176 | 0.5
qwertyu0177 | 0.5
qwertyu0178 | 0.5
qwertyu0179 | 0.5
qwertyu0180 | 0.5
qwertyu0181 | 0.5
qwertyu0182 | 0.5
qwertyu0183 | 0.5
qwertyu0184 | 0.5
qwertyu0185 | 0.5
qwertyu0186 | 0.5
qwertyu0187 | 0.5
qwertyu0189 | 0.5
qwertyu0190 | 0.5
qwertyu0191 | 0.5
qwertyu0192 | 0.5
qwertyu0193 | 0.5
qwertyu0194 | 0.5
qwertyu0195 | 0.5
qwertyu0196 | 0.5
qwertyu0197 | 0.5
qwertyu0198 | 0.5
qwertyu0199 | 0.5
qwertyu0200 | 0.5
qwertyu0201 | 0.5
qwertyu0202 | 0.5
qwertyu0203 | 0.5
qwertyu0204 | 0.5
qwertyu0205 | 0.5
qwertyu0206 | 0.5
qwertyu0207 | 0.5
qwertyu0208 | 0.5
qwertyu0209 | 0.5
qwertyu0210 | 0.5
qwertyu0211 | 0.5
qwertyu0212 | 0.5
qwertyu0213 | 0.5
qwertyu0214 | 0.5
qwertyu0215 | 0.5
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qwertyu1000 | 0.411765
(1000 rows)
select t,similarity(t,'gwertyu0988') as sml from test_trgm where t % 'gwertyu0988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 0.6
qwertyu0980 | 0.411765
qwertyu0981 | 0.411765
qwertyu0982 | 0.411765
qwertyu0983 | 0.411765
qwertyu0984 | 0.411765
qwertyu0985 | 0.411765
qwertyu0986 | 0.411765
qwertyu0987 | 0.411765
qwertyu0989 | 0.411765
qwertyu0088 | 0.333333
qwertyu0098 | 0.333333
qwertyu0188 | 0.333333
qwertyu0288 | 0.333333
qwertyu0388 | 0.333333
qwertyu0488 | 0.333333
qwertyu0588 | 0.333333
qwertyu0688 | 0.333333
qwertyu0788 | 0.333333
qwertyu0888 | 0.333333
qwertyu0900 | 0.333333
qwertyu0901 | 0.333333
qwertyu0902 | 0.333333
qwertyu0903 | 0.333333
qwertyu0904 | 0.333333
qwertyu0905 | 0.333333
qwertyu0906 | 0.333333
qwertyu0907 | 0.333333
qwertyu0908 | 0.333333
qwertyu0909 | 0.333333
qwertyu0910 | 0.333333
qwertyu0911 | 0.333333
qwertyu0912 | 0.333333
qwertyu0913 | 0.333333
qwertyu0914 | 0.333333
qwertyu0915 | 0.333333
qwertyu0916 | 0.333333
qwertyu0917 | 0.333333
qwertyu0918 | 0.333333
qwertyu0919 | 0.333333
qwertyu0920 | 0.333333
qwertyu0921 | 0.333333
qwertyu0922 | 0.333333
qwertyu0923 | 0.333333
qwertyu0924 | 0.333333
qwertyu0925 | 0.333333
qwertyu0926 | 0.333333
qwertyu0927 | 0.333333
qwertyu0928 | 0.333333
qwertyu0929 | 0.333333
qwertyu0930 | 0.333333
qwertyu0931 | 0.333333
qwertyu0932 | 0.333333
qwertyu0933 | 0.333333
qwertyu0934 | 0.333333
qwertyu0935 | 0.333333
qwertyu0936 | 0.333333
qwertyu0937 | 0.333333
qwertyu0938 | 0.333333
qwertyu0939 | 0.333333
qwertyu0940 | 0.333333
qwertyu0941 | 0.333333
qwertyu0942 | 0.333333
qwertyu0943 | 0.333333
qwertyu0944 | 0.333333
qwertyu0945 | 0.333333
qwertyu0946 | 0.333333
qwertyu0947 | 0.333333
qwertyu0948 | 0.333333
qwertyu0949 | 0.333333
qwertyu0950 | 0.333333
qwertyu0951 | 0.333333
qwertyu0952 | 0.333333
qwertyu0953 | 0.333333
qwertyu0954 | 0.333333
qwertyu0955 | 0.333333
qwertyu0956 | 0.333333
qwertyu0957 | 0.333333
qwertyu0958 | 0.333333
qwertyu0959 | 0.333333
qwertyu0960 | 0.333333
qwertyu0961 | 0.333333
qwertyu0962 | 0.333333
qwertyu0963 | 0.333333
qwertyu0964 | 0.333333
qwertyu0965 | 0.333333
qwertyu0966 | 0.333333
qwertyu0967 | 0.333333
qwertyu0968 | 0.333333
qwertyu0969 | 0.333333
qwertyu0970 | 0.333333
qwertyu0971 | 0.333333
qwertyu0972 | 0.333333
qwertyu0973 | 0.333333
qwertyu0974 | 0.333333
qwertyu0975 | 0.333333
qwertyu0976 | 0.333333
qwertyu0977 | 0.333333
qwertyu0978 | 0.333333
qwertyu0979 | 0.333333
qwertyu0990 | 0.333333
qwertyu0991 | 0.333333
qwertyu0992 | 0.333333
qwertyu0993 | 0.333333
qwertyu0994 | 0.333333
qwertyu0995 | 0.333333
qwertyu0996 | 0.333333
qwertyu0997 | 0.333333
qwertyu0998 | 0.333333
qwertyu0999 | 0.333333
(110 rows)
select t,similarity(t,'gwertyu1988') as sml from test_trgm where t % 'gwertyu1988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 0.333333
(1 row)
explain (costs off)
select t <-> 'q0987wertyu0988', t from test_trgm order by t <-> 'q0987wertyu0988' limit 2;
QUERY PLAN
---------------------------------------------------
Limit
-> Index Scan using trgm_idx on test_trgm
Order By: (t <-> 'q0987wertyu0988'::text)
(3 rows)
select t <-> 'q0987wertyu0988', t from test_trgm order by t <-> 'q0987wertyu0988' limit 2;
?column? | t
----------+-------------
0.411765 | qwertyu0988
0.5 | qwertyu0987
(2 rows)
select count(*) from test_trgm where t ~ '[qwerty]{2}-?[qwerty]{2}';
count
-------
1000
(1 row)
drop index trgm_idx;
create index trgm_idx on test_trgm using gin (t gin_trgm_ops);
set enable_seqscan=off;
select t,similarity(t,'qwertyu0988') as sml from test_trgm where t % 'qwertyu0988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 1
qwertyu0980 | 0.714286
qwertyu0981 | 0.714286
qwertyu0982 | 0.714286
qwertyu0983 | 0.714286
qwertyu0984 | 0.714286
qwertyu0985 | 0.714286
qwertyu0986 | 0.714286
qwertyu0987 | 0.714286
qwertyu0989 | 0.714286
qwertyu0088 | 0.6
qwertyu0098 | 0.6
qwertyu0188 | 0.6
qwertyu0288 | 0.6
qwertyu0388 | 0.6
qwertyu0488 | 0.6
qwertyu0588 | 0.6
qwertyu0688 | 0.6
qwertyu0788 | 0.6
qwertyu0888 | 0.6
qwertyu0900 | 0.6
qwertyu0901 | 0.6
qwertyu0902 | 0.6
qwertyu0903 | 0.6
qwertyu0904 | 0.6
qwertyu0905 | 0.6
qwertyu0906 | 0.6
qwertyu0907 | 0.6
qwertyu0908 | 0.6
qwertyu0909 | 0.6
qwertyu0910 | 0.6
qwertyu0911 | 0.6
qwertyu0912 | 0.6
qwertyu0913 | 0.6
qwertyu0914 | 0.6
qwertyu0915 | 0.6
qwertyu0916 | 0.6
qwertyu0917 | 0.6
qwertyu0918 | 0.6
qwertyu0919 | 0.6
qwertyu0920 | 0.6
qwertyu0921 | 0.6
qwertyu0922 | 0.6
qwertyu0923 | 0.6
qwertyu0924 | 0.6
qwertyu0925 | 0.6
qwertyu0926 | 0.6
qwertyu0927 | 0.6
qwertyu0928 | 0.6
qwertyu0929 | 0.6
qwertyu0930 | 0.6
qwertyu0931 | 0.6
qwertyu0932 | 0.6
qwertyu0933 | 0.6
qwertyu0934 | 0.6
qwertyu0935 | 0.6
qwertyu0936 | 0.6
qwertyu0937 | 0.6
qwertyu0938 | 0.6
qwertyu0939 | 0.6
qwertyu0940 | 0.6
qwertyu0941 | 0.6
qwertyu0942 | 0.6
qwertyu0943 | 0.6
qwertyu0944 | 0.6
qwertyu0945 | 0.6
qwertyu0946 | 0.6
qwertyu0947 | 0.6
qwertyu0948 | 0.6
qwertyu0949 | 0.6
qwertyu0950 | 0.6
qwertyu0951 | 0.6
qwertyu0952 | 0.6
qwertyu0953 | 0.6
qwertyu0954 | 0.6
qwertyu0955 | 0.6
qwertyu0956 | 0.6
qwertyu0957 | 0.6
qwertyu0958 | 0.6
qwertyu0959 | 0.6
qwertyu0960 | 0.6
qwertyu0961 | 0.6
qwertyu0962 | 0.6
qwertyu0963 | 0.6
qwertyu0964 | 0.6
qwertyu0965 | 0.6
qwertyu0966 | 0.6
qwertyu0967 | 0.6
qwertyu0968 | 0.6
qwertyu0969 | 0.6
qwertyu0970 | 0.6
qwertyu0971 | 0.6
qwertyu0972 | 0.6
qwertyu0973 | 0.6
qwertyu0974 | 0.6
qwertyu0975 | 0.6
qwertyu0976 | 0.6
qwertyu0977 | 0.6
qwertyu0978 | 0.6
qwertyu0979 | 0.6
qwertyu0990 | 0.6
qwertyu0991 | 0.6
qwertyu0992 | 0.6
qwertyu0993 | 0.6
qwertyu0994 | 0.6
qwertyu0995 | 0.6
qwertyu0996 | 0.6
qwertyu0997 | 0.6
qwertyu0998 | 0.6
qwertyu0999 | 0.6
qwertyu0001 | 0.5
qwertyu0002 | 0.5
qwertyu0003 | 0.5
qwertyu0004 | 0.5
qwertyu0005 | 0.5
qwertyu0006 | 0.5
qwertyu0007 | 0.5
qwertyu0008 | 0.5
qwertyu0009 | 0.5
qwertyu0010 | 0.5
qwertyu0011 | 0.5
qwertyu0012 | 0.5
qwertyu0013 | 0.5
qwertyu0014 | 0.5
qwertyu0015 | 0.5
qwertyu0016 | 0.5
qwertyu0017 | 0.5
qwertyu0018 | 0.5
qwertyu0019 | 0.5
qwertyu0020 | 0.5
qwertyu0021 | 0.5
qwertyu0022 | 0.5
qwertyu0023 | 0.5
qwertyu0024 | 0.5
qwertyu0025 | 0.5
qwertyu0026 | 0.5
qwertyu0027 | 0.5
qwertyu0028 | 0.5
qwertyu0029 | 0.5
qwertyu0030 | 0.5
qwertyu0031 | 0.5
qwertyu0032 | 0.5
qwertyu0033 | 0.5
qwertyu0034 | 0.5
qwertyu0035 | 0.5
qwertyu0036 | 0.5
qwertyu0037 | 0.5
qwertyu0038 | 0.5
qwertyu0039 | 0.5
qwertyu0040 | 0.5
qwertyu0041 | 0.5
qwertyu0042 | 0.5
qwertyu0043 | 0.5
qwertyu0044 | 0.5
qwertyu0045 | 0.5
qwertyu0046 | 0.5
qwertyu0047 | 0.5
qwertyu0048 | 0.5
qwertyu0049 | 0.5
qwertyu0050 | 0.5
qwertyu0051 | 0.5
qwertyu0052 | 0.5
qwertyu0053 | 0.5
qwertyu0054 | 0.5
qwertyu0055 | 0.5
qwertyu0056 | 0.5
qwertyu0057 | 0.5
qwertyu0058 | 0.5
qwertyu0059 | 0.5
qwertyu0060 | 0.5
qwertyu0061 | 0.5
qwertyu0062 | 0.5
qwertyu0063 | 0.5
qwertyu0064 | 0.5
qwertyu0065 | 0.5
qwertyu0066 | 0.5
qwertyu0067 | 0.5
qwertyu0068 | 0.5
qwertyu0069 | 0.5
qwertyu0070 | 0.5
qwertyu0071 | 0.5
qwertyu0072 | 0.5
qwertyu0073 | 0.5
qwertyu0074 | 0.5
qwertyu0075 | 0.5
qwertyu0076 | 0.5
qwertyu0077 | 0.5
qwertyu0078 | 0.5
qwertyu0079 | 0.5
qwertyu0080 | 0.5
qwertyu0081 | 0.5
qwertyu0082 | 0.5
qwertyu0083 | 0.5
qwertyu0084 | 0.5
qwertyu0085 | 0.5
qwertyu0086 | 0.5
qwertyu0087 | 0.5
qwertyu0089 | 0.5
qwertyu0090 | 0.5
qwertyu0091 | 0.5
qwertyu0092 | 0.5
qwertyu0093 | 0.5
qwertyu0094 | 0.5
qwertyu0095 | 0.5
qwertyu0096 | 0.5
qwertyu0097 | 0.5
qwertyu0099 | 0.5
qwertyu0100 | 0.5
qwertyu0101 | 0.5
qwertyu0102 | 0.5
qwertyu0103 | 0.5
qwertyu0104 | 0.5
qwertyu0105 | 0.5
qwertyu0106 | 0.5
qwertyu0107 | 0.5
qwertyu0108 | 0.5
qwertyu0109 | 0.5
qwertyu0110 | 0.5
qwertyu0111 | 0.5
qwertyu0112 | 0.5
qwertyu0113 | 0.5
qwertyu0114 | 0.5
qwertyu0115 | 0.5
qwertyu0116 | 0.5
qwertyu0117 | 0.5
qwertyu0118 | 0.5
qwertyu0119 | 0.5
qwertyu0120 | 0.5
qwertyu0121 | 0.5
qwertyu0122 | 0.5
qwertyu0123 | 0.5
qwertyu0124 | 0.5
qwertyu0125 | 0.5
qwertyu0126 | 0.5
qwertyu0127 | 0.5
qwertyu0128 | 0.5
qwertyu0129 | 0.5
qwertyu0130 | 0.5
qwertyu0131 | 0.5
qwertyu0132 | 0.5
qwertyu0133 | 0.5
qwertyu0134 | 0.5
qwertyu0135 | 0.5
qwertyu0136 | 0.5
qwertyu0137 | 0.5
qwertyu0138 | 0.5
qwertyu0139 | 0.5
qwertyu0140 | 0.5
qwertyu0141 | 0.5
qwertyu0142 | 0.5
qwertyu0143 | 0.5
qwertyu0144 | 0.5
qwertyu0145 | 0.5
qwertyu0146 | 0.5
qwertyu0147 | 0.5
qwertyu0148 | 0.5
qwertyu0149 | 0.5
qwertyu0150 | 0.5
qwertyu0151 | 0.5
qwertyu0152 | 0.5
qwertyu0153 | 0.5
qwertyu0154 | 0.5
qwertyu0155 | 0.5
qwertyu0156 | 0.5
qwertyu0157 | 0.5
qwertyu0158 | 0.5
qwertyu0159 | 0.5
qwertyu0160 | 0.5
qwertyu0161 | 0.5
qwertyu0162 | 0.5
qwertyu0163 | 0.5
qwertyu0164 | 0.5
qwertyu0165 | 0.5
qwertyu0166 | 0.5
qwertyu0167 | 0.5
qwertyu0168 | 0.5
qwertyu0169 | 0.5
qwertyu0170 | 0.5
qwertyu0171 | 0.5
qwertyu0172 | 0.5
qwertyu0173 | 0.5
qwertyu0174 | 0.5
qwertyu0175 | 0.5
qwertyu0176 | 0.5
qwertyu0177 | 0.5
qwertyu0178 | 0.5
qwertyu0179 | 0.5
qwertyu0180 | 0.5
qwertyu0181 | 0.5
qwertyu0182 | 0.5
qwertyu0183 | 0.5
qwertyu0184 | 0.5
qwertyu0185 | 0.5
qwertyu0186 | 0.5
qwertyu0187 | 0.5
qwertyu0189 | 0.5
qwertyu0190 | 0.5
qwertyu0191 | 0.5
qwertyu0192 | 0.5
qwertyu0193 | 0.5
qwertyu0194 | 0.5
qwertyu0195 | 0.5
qwertyu0196 | 0.5
qwertyu0197 | 0.5
qwertyu0198 | 0.5
qwertyu0199 | 0.5
qwertyu0200 | 0.5
qwertyu0201 | 0.5
qwertyu0202 | 0.5
qwertyu0203 | 0.5
qwertyu0204 | 0.5
qwertyu0205 | 0.5
qwertyu0206 | 0.5
qwertyu0207 | 0.5
qwertyu0208 | 0.5
qwertyu0209 | 0.5
qwertyu0210 | 0.5
qwertyu0211 | 0.5
qwertyu0212 | 0.5
qwertyu0213 | 0.5
qwertyu0214 | 0.5
qwertyu0215 | 0.5
qwertyu0216 | 0.5
qwertyu0217 | 0.5
qwertyu0218 | 0.5
qwertyu0219 | 0.5
qwertyu0220 | 0.5
qwertyu0221 | 0.5
qwertyu0222 | 0.5
qwertyu0223 | 0.5
qwertyu0224 | 0.5
qwertyu0225 | 0.5
qwertyu0226 | 0.5
qwertyu0227 | 0.5
qwertyu0228 | 0.5
qwertyu0229 | 0.5
qwertyu0230 | 0.5
qwertyu0231 | 0.5
qwertyu0232 | 0.5
qwertyu0233 | 0.5
qwertyu0234 | 0.5
qwertyu0235 | 0.5
qwertyu0236 | 0.5
qwertyu0237 | 0.5
qwertyu0238 | 0.5
qwertyu0239 | 0.5
qwertyu0240 | 0.5
qwertyu0241 | 0.5
qwertyu0242 | 0.5
qwertyu0243 | 0.5
qwertyu0244 | 0.5
qwertyu0245 | 0.5
qwertyu0246 | 0.5
qwertyu0247 | 0.5
qwertyu0248 | 0.5
qwertyu0249 | 0.5
qwertyu0250 | 0.5
qwertyu0251 | 0.5
qwertyu0252 | 0.5
qwertyu0253 | 0.5
qwertyu0254 | 0.5
qwertyu0255 | 0.5
qwertyu0256 | 0.5
qwertyu0257 | 0.5
qwertyu0258 | 0.5
qwertyu0259 | 0.5
qwertyu0260 | 0.5
qwertyu0261 | 0.5
qwertyu0262 | 0.5
qwertyu0263 | 0.5
qwertyu0264 | 0.5
qwertyu0265 | 0.5
qwertyu0266 | 0.5
qwertyu0267 | 0.5
qwertyu0268 | 0.5
qwertyu0269 | 0.5
qwertyu0270 | 0.5
qwertyu0271 | 0.5
qwertyu0272 | 0.5
qwertyu0273 | 0.5
qwertyu0274 | 0.5
qwertyu0275 | 0.5
qwertyu0276 | 0.5
qwertyu0277 | 0.5
qwertyu0278 | 0.5
qwertyu0279 | 0.5
qwertyu0280 | 0.5
qwertyu0281 | 0.5
qwertyu0282 | 0.5
qwertyu0283 | 0.5
qwertyu0284 | 0.5
qwertyu0285 | 0.5
qwertyu0286 | 0.5
qwertyu0287 | 0.5
qwertyu0289 | 0.5
qwertyu0290 | 0.5
qwertyu0291 | 0.5
qwertyu0292 | 0.5
qwertyu0293 | 0.5
qwertyu0294 | 0.5
qwertyu0295 | 0.5
qwertyu0296 | 0.5
qwertyu0297 | 0.5
qwertyu0298 | 0.5
qwertyu0299 | 0.5
qwertyu0300 | 0.5
qwertyu0301 | 0.5
qwertyu0302 | 0.5
qwertyu0303 | 0.5
qwertyu0304 | 0.5
qwertyu0305 | 0.5
qwertyu0306 | 0.5
qwertyu0307 | 0.5
qwertyu0308 | 0.5
qwertyu0309 | 0.5
qwertyu0310 | 0.5
qwertyu0311 | 0.5
qwertyu0312 | 0.5
qwertyu0313 | 0.5
qwertyu0314 | 0.5
qwertyu0315 | 0.5
qwertyu0316 | 0.5
qwertyu0317 | 0.5
qwertyu0318 | 0.5
qwertyu0319 | 0.5
qwertyu0320 | 0.5
qwertyu0321 | 0.5
qwertyu0322 | 0.5
qwertyu0323 | 0.5
qwertyu0324 | 0.5
qwertyu0325 | 0.5
qwertyu0326 | 0.5
qwertyu0327 | 0.5
qwertyu0328 | 0.5
qwertyu0329 | 0.5
qwertyu0330 | 0.5
qwertyu0331 | 0.5
qwertyu0332 | 0.5
qwertyu0333 | 0.5
qwertyu0334 | 0.5
qwertyu0335 | 0.5
qwertyu0336 | 0.5
qwertyu0337 | 0.5
qwertyu0338 | 0.5
qwertyu0339 | 0.5
qwertyu0340 | 0.5
qwertyu0341 | 0.5
qwertyu0342 | 0.5
qwertyu0343 | 0.5
qwertyu0344 | 0.5
qwertyu0345 | 0.5
qwertyu0346 | 0.5
qwertyu0347 | 0.5
qwertyu0348 | 0.5
qwertyu0349 | 0.5
qwertyu0350 | 0.5
qwertyu0351 | 0.5
qwertyu0352 | 0.5
qwertyu0353 | 0.5
qwertyu0354 | 0.5
qwertyu0355 | 0.5
qwertyu0356 | 0.5
qwertyu0357 | 0.5
qwertyu0358 | 0.5
qwertyu0359 | 0.5
qwertyu0360 | 0.5
qwertyu0361 | 0.5
qwertyu0362 | 0.5
qwertyu0363 | 0.5
qwertyu0364 | 0.5
qwertyu0365 | 0.5
qwertyu0366 | 0.5
qwertyu0367 | 0.5
qwertyu0368 | 0.5
qwertyu0369 | 0.5
qwertyu0370 | 0.5
qwertyu0371 | 0.5
qwertyu0372 | 0.5
qwertyu0373 | 0.5
qwertyu0374 | 0.5
qwertyu0375 | 0.5
qwertyu0376 | 0.5
qwertyu0377 | 0.5
qwertyu0378 | 0.5
qwertyu0379 | 0.5
qwertyu0380 | 0.5
qwertyu0381 | 0.5
qwertyu0382 | 0.5
qwertyu0383 | 0.5
qwertyu0384 | 0.5
qwertyu0385 | 0.5
qwertyu0386 | 0.5
qwertyu0387 | 0.5
qwertyu0389 | 0.5
qwertyu0390 | 0.5
qwertyu0391 | 0.5
qwertyu0392 | 0.5
qwertyu0393 | 0.5
qwertyu0394 | 0.5
qwertyu0395 | 0.5
qwertyu0396 | 0.5
qwertyu0397 | 0.5
qwertyu0398 | 0.5
qwertyu0399 | 0.5
qwertyu0400 | 0.5
qwertyu0401 | 0.5
qwertyu0402 | 0.5
qwertyu0403 | 0.5
qwertyu0404 | 0.5
qwertyu0405 | 0.5
qwertyu0406 | 0.5
qwertyu0407 | 0.5
qwertyu0408 | 0.5
qwertyu0409 | 0.5
qwertyu0410 | 0.5
qwertyu0411 | 0.5
qwertyu0412 | 0.5
qwertyu0413 | 0.5
qwertyu0414 | 0.5
qwertyu0415 | 0.5
qwertyu0416 | 0.5
qwertyu0417 | 0.5
qwertyu0418 | 0.5
qwertyu0419 | 0.5
qwertyu0420 | 0.5
qwertyu0421 | 0.5
qwertyu0422 | 0.5
qwertyu0423 | 0.5
qwertyu0424 | 0.5
qwertyu0425 | 0.5
qwertyu0426 | 0.5
qwertyu0427 | 0.5
qwertyu0428 | 0.5
qwertyu0429 | 0.5
qwertyu0430 | 0.5
qwertyu0431 | 0.5
qwertyu0432 | 0.5
qwertyu0433 | 0.5
qwertyu0434 | 0.5
qwertyu0435 | 0.5
qwertyu0436 | 0.5
qwertyu0437 | 0.5
qwertyu0438 | 0.5
qwertyu0439 | 0.5
qwertyu0440 | 0.5
qwertyu0441 | 0.5
qwertyu0442 | 0.5
qwertyu0443 | 0.5
qwertyu0444 | 0.5
qwertyu0445 | 0.5
qwertyu0446 | 0.5
qwertyu0447 | 0.5
qwertyu0448 | 0.5
qwertyu0449 | 0.5
qwertyu0450 | 0.5
qwertyu0451 | 0.5
qwertyu0452 | 0.5
qwertyu0453 | 0.5
qwertyu0454 | 0.5
qwertyu0455 | 0.5
qwertyu0456 | 0.5
qwertyu0457 | 0.5
qwertyu0458 | 0.5
qwertyu0459 | 0.5
qwertyu0460 | 0.5
qwertyu0461 | 0.5
qwertyu0462 | 0.5
qwertyu0463 | 0.5
qwertyu0464 | 0.5
qwertyu0465 | 0.5
qwertyu0466 | 0.5
qwertyu0467 | 0.5
qwertyu0468 | 0.5
qwertyu0469 | 0.5
qwertyu0470 | 0.5
qwertyu0471 | 0.5
qwertyu0472 | 0.5
qwertyu0473 | 0.5
qwertyu0474 | 0.5
qwertyu0475 | 0.5
qwertyu0476 | 0.5
qwertyu0477 | 0.5
qwertyu0478 | 0.5
qwertyu0479 | 0.5
qwertyu0480 | 0.5
qwertyu0481 | 0.5
qwertyu0482 | 0.5
qwertyu0483 | 0.5
qwertyu0484 | 0.5
qwertyu0485 | 0.5
qwertyu0486 | 0.5
qwertyu0487 | 0.5
qwertyu0489 | 0.5
qwertyu0490 | 0.5
qwertyu0491 | 0.5
qwertyu0492 | 0.5
qwertyu0493 | 0.5
qwertyu0494 | 0.5
qwertyu0495 | 0.5
qwertyu0496 | 0.5
qwertyu0497 | 0.5
qwertyu0498 | 0.5
qwertyu0499 | 0.5
qwertyu0500 | 0.5
qwertyu0501 | 0.5
qwertyu0502 | 0.5
qwertyu0503 | 0.5
qwertyu0504 | 0.5
qwertyu0505 | 0.5
qwertyu0506 | 0.5
qwertyu0507 | 0.5
qwertyu0508 | 0.5
qwertyu0509 | 0.5
qwertyu0510 | 0.5
qwertyu0511 | 0.5
qwertyu0512 | 0.5
qwertyu0513 | 0.5
qwertyu0514 | 0.5
qwertyu0515 | 0.5
qwertyu0516 | 0.5
qwertyu0517 | 0.5
qwertyu0518 | 0.5
qwertyu0519 | 0.5
qwertyu0520 | 0.5
qwertyu0521 | 0.5
qwertyu0522 | 0.5
qwertyu0523 | 0.5
qwertyu0524 | 0.5
qwertyu0525 | 0.5
qwertyu0526 | 0.5
qwertyu0527 | 0.5
qwertyu0528 | 0.5
qwertyu0529 | 0.5
qwertyu0530 | 0.5
qwertyu0531 | 0.5
qwertyu0532 | 0.5
qwertyu0533 | 0.5
qwertyu0534 | 0.5
qwertyu0535 | 0.5
qwertyu0536 | 0.5
qwertyu0537 | 0.5
qwertyu0538 | 0.5
qwertyu0539 | 0.5
qwertyu0540 | 0.5
qwertyu0541 | 0.5
qwertyu0542 | 0.5
qwertyu0543 | 0.5
qwertyu0544 | 0.5
qwertyu0545 | 0.5
qwertyu0546 | 0.5
qwertyu0547 | 0.5
qwertyu0548 | 0.5
qwertyu0549 | 0.5
qwertyu0550 | 0.5
qwertyu0551 | 0.5
qwertyu0552 | 0.5
qwertyu0553 | 0.5
qwertyu0554 | 0.5
qwertyu0555 | 0.5
qwertyu0556 | 0.5
qwertyu0557 | 0.5
qwertyu0558 | 0.5
qwertyu0559 | 0.5
qwertyu0560 | 0.5
qwertyu0561 | 0.5
qwertyu0562 | 0.5
qwertyu0563 | 0.5
qwertyu0564 | 0.5
qwertyu0565 | 0.5
qwertyu0566 | 0.5
qwertyu0567 | 0.5
qwertyu0568 | 0.5
qwertyu0569 | 0.5
qwertyu0570 | 0.5
qwertyu0571 | 0.5
qwertyu0572 | 0.5
qwertyu0573 | 0.5
qwertyu0574 | 0.5
qwertyu0575 | 0.5
qwertyu0576 | 0.5
qwertyu0577 | 0.5
qwertyu0578 | 0.5
qwertyu0579 | 0.5
qwertyu0580 | 0.5
qwertyu0581 | 0.5
qwertyu0582 | 0.5
qwertyu0583 | 0.5
qwertyu0584 | 0.5
qwertyu0585 | 0.5
qwertyu0586 | 0.5
qwertyu0587 | 0.5
qwertyu0589 | 0.5
qwertyu0590 | 0.5
qwertyu0591 | 0.5
qwertyu0592 | 0.5
qwertyu0593 | 0.5
qwertyu0594 | 0.5
qwertyu0595 | 0.5
qwertyu0596 | 0.5
qwertyu0597 | 0.5
qwertyu0598 | 0.5
qwertyu0599 | 0.5
qwertyu0600 | 0.5
qwertyu0601 | 0.5
qwertyu0602 | 0.5
qwertyu0603 | 0.5
qwertyu0604 | 0.5
qwertyu0605 | 0.5
qwertyu0606 | 0.5
qwertyu0607 | 0.5
qwertyu0608 | 0.5
qwertyu0609 | 0.5
qwertyu0610 | 0.5
qwertyu0611 | 0.5
qwertyu0612 | 0.5
qwertyu0613 | 0.5
qwertyu0614 | 0.5
qwertyu0615 | 0.5
qwertyu0616 | 0.5
qwertyu0617 | 0.5
qwertyu0618 | 0.5
qwertyu0619 | 0.5
qwertyu0620 | 0.5
qwertyu0621 | 0.5
qwertyu0622 | 0.5
qwertyu0623 | 0.5
qwertyu0624 | 0.5
qwertyu0625 | 0.5
qwertyu0626 | 0.5
qwertyu0627 | 0.5
qwertyu0628 | 0.5
qwertyu0629 | 0.5
qwertyu0630 | 0.5
qwertyu0631 | 0.5
qwertyu0632 | 0.5
qwertyu0633 | 0.5
qwertyu0634 | 0.5
qwertyu0635 | 0.5
qwertyu0636 | 0.5
qwertyu0637 | 0.5
qwertyu0638 | 0.5
qwertyu0639 | 0.5
qwertyu0640 | 0.5
qwertyu0641 | 0.5
qwertyu0642 | 0.5
qwertyu0643 | 0.5
qwertyu0644 | 0.5
qwertyu0645 | 0.5
qwertyu0646 | 0.5
qwertyu0647 | 0.5
qwertyu0648 | 0.5
qwertyu0649 | 0.5
qwertyu0650 | 0.5
qwertyu0651 | 0.5
qwertyu0652 | 0.5
qwertyu0653 | 0.5
qwertyu0654 | 0.5
qwertyu0655 | 0.5
qwertyu0656 | 0.5
qwertyu0657 | 0.5
qwertyu0658 | 0.5
qwertyu0659 | 0.5
qwertyu0660 | 0.5
qwertyu0661 | 0.5
qwertyu0662 | 0.5
qwertyu0663 | 0.5
qwertyu0664 | 0.5
qwertyu0665 | 0.5
qwertyu0666 | 0.5
qwertyu0667 | 0.5
qwertyu0668 | 0.5
qwertyu0669 | 0.5
qwertyu0670 | 0.5
qwertyu0671 | 0.5
qwertyu0672 | 0.5
qwertyu0673 | 0.5
qwertyu0674 | 0.5
qwertyu0675 | 0.5
qwertyu0676 | 0.5
qwertyu0677 | 0.5
qwertyu0678 | 0.5
qwertyu0679 | 0.5
qwertyu0680 | 0.5
qwertyu0681 | 0.5
qwertyu0682 | 0.5
qwertyu0683 | 0.5
qwertyu0684 | 0.5
qwertyu0685 | 0.5
qwertyu0686 | 0.5
qwertyu0687 | 0.5
qwertyu0689 | 0.5
qwertyu0690 | 0.5
qwertyu0691 | 0.5
qwertyu0692 | 0.5
qwertyu0693 | 0.5
qwertyu0694 | 0.5
qwertyu0695 | 0.5
qwertyu0696 | 0.5
qwertyu0697 | 0.5
qwertyu0698 | 0.5
qwertyu0699 | 0.5
qwertyu0700 | 0.5
qwertyu0701 | 0.5
qwertyu0702 | 0.5
qwertyu0703 | 0.5
qwertyu0704 | 0.5
qwertyu0705 | 0.5
qwertyu0706 | 0.5
qwertyu0707 | 0.5
qwertyu0708 | 0.5
qwertyu0709 | 0.5
qwertyu0710 | 0.5
qwertyu0711 | 0.5
qwertyu0712 | 0.5
qwertyu0713 | 0.5
qwertyu0714 | 0.5
qwertyu0715 | 0.5
qwertyu0716 | 0.5
qwertyu0717 | 0.5
qwertyu0718 | 0.5
qwertyu0719 | 0.5
qwertyu0720 | 0.5
qwertyu0721 | 0.5
qwertyu0722 | 0.5
qwertyu0723 | 0.5
qwertyu0724 | 0.5
qwertyu0725 | 0.5
qwertyu0726 | 0.5
qwertyu0727 | 0.5
qwertyu0728 | 0.5
qwertyu0729 | 0.5
qwertyu0730 | 0.5
qwertyu0731 | 0.5
qwertyu0732 | 0.5
qwertyu0733 | 0.5
qwertyu0734 | 0.5
qwertyu0735 | 0.5
qwertyu0736 | 0.5
qwertyu0737 | 0.5
qwertyu0738 | 0.5
qwertyu0739 | 0.5
qwertyu0740 | 0.5
qwertyu0741 | 0.5
qwertyu0742 | 0.5
qwertyu0743 | 0.5
qwertyu0744 | 0.5
qwertyu0745 | 0.5
qwertyu0746 | 0.5
qwertyu0747 | 0.5
qwertyu0748 | 0.5
qwertyu0749 | 0.5
qwertyu0750 | 0.5
qwertyu0751 | 0.5
qwertyu0752 | 0.5
qwertyu0753 | 0.5
qwertyu0754 | 0.5
qwertyu0755 | 0.5
qwertyu0756 | 0.5
qwertyu0757 | 0.5
qwertyu0758 | 0.5
qwertyu0759 | 0.5
qwertyu0760 | 0.5
qwertyu0761 | 0.5
qwertyu0762 | 0.5
qwertyu0763 | 0.5
qwertyu0764 | 0.5
qwertyu0765 | 0.5
qwertyu0766 | 0.5
qwertyu0767 | 0.5
qwertyu0768 | 0.5
qwertyu0769 | 0.5
qwertyu0770 | 0.5
qwertyu0771 | 0.5
qwertyu0772 | 0.5
qwertyu0773 | 0.5
qwertyu0774 | 0.5
qwertyu0775 | 0.5
qwertyu0776 | 0.5
qwertyu0777 | 0.5
qwertyu0778 | 0.5
qwertyu0779 | 0.5
qwertyu0780 | 0.5
qwertyu0781 | 0.5
qwertyu0782 | 0.5
qwertyu0783 | 0.5
qwertyu0784 | 0.5
qwertyu0785 | 0.5
qwertyu0786 | 0.5
qwertyu0787 | 0.5
qwertyu0789 | 0.5
qwertyu0790 | 0.5
qwertyu0791 | 0.5
qwertyu0792 | 0.5
qwertyu0793 | 0.5
qwertyu0794 | 0.5
qwertyu0795 | 0.5
qwertyu0796 | 0.5
qwertyu0797 | 0.5
qwertyu0798 | 0.5
qwertyu0799 | 0.5
qwertyu0800 | 0.5
qwertyu0801 | 0.5
qwertyu0802 | 0.5
qwertyu0803 | 0.5
qwertyu0804 | 0.5
qwertyu0805 | 0.5
qwertyu0806 | 0.5
qwertyu0807 | 0.5
qwertyu0808 | 0.5
qwertyu0809 | 0.5
qwertyu0810 | 0.5
qwertyu0811 | 0.5
qwertyu0812 | 0.5
qwertyu0813 | 0.5
qwertyu0814 | 0.5
qwertyu0815 | 0.5
qwertyu0816 | 0.5
qwertyu0817 | 0.5
qwertyu0818 | 0.5
qwertyu0819 | 0.5
qwertyu0820 | 0.5
qwertyu0821 | 0.5
qwertyu0822 | 0.5
qwertyu0823 | 0.5
qwertyu0824 | 0.5
qwertyu0825 | 0.5
qwertyu0826 | 0.5
qwertyu0827 | 0.5
qwertyu0828 | 0.5
qwertyu0829 | 0.5
qwertyu0830 | 0.5
qwertyu0831 | 0.5
qwertyu0832 | 0.5
qwertyu0833 | 0.5
qwertyu0834 | 0.5
qwertyu0835 | 0.5
qwertyu0836 | 0.5
qwertyu0837 | 0.5
qwertyu0838 | 0.5
qwertyu0839 | 0.5
qwertyu0840 | 0.5
qwertyu0841 | 0.5
qwertyu0842 | 0.5
qwertyu0843 | 0.5
qwertyu0844 | 0.5
qwertyu0845 | 0.5
qwertyu0846 | 0.5
qwertyu0847 | 0.5
qwertyu0848 | 0.5
qwertyu0849 | 0.5
qwertyu0850 | 0.5
qwertyu0851 | 0.5
qwertyu0852 | 0.5
qwertyu0853 | 0.5
qwertyu0854 | 0.5
qwertyu0855 | 0.5
qwertyu0856 | 0.5
qwertyu0857 | 0.5
qwertyu0858 | 0.5
qwertyu0859 | 0.5
qwertyu0860 | 0.5
qwertyu0861 | 0.5
qwertyu0862 | 0.5
qwertyu0863 | 0.5
qwertyu0864 | 0.5
qwertyu0865 | 0.5
qwertyu0866 | 0.5
qwertyu0867 | 0.5
qwertyu0868 | 0.5
qwertyu0869 | 0.5
qwertyu0870 | 0.5
qwertyu0871 | 0.5
qwertyu0872 | 0.5
qwertyu0873 | 0.5
qwertyu0874 | 0.5
qwertyu0875 | 0.5
qwertyu0876 | 0.5
qwertyu0877 | 0.5
qwertyu0878 | 0.5
qwertyu0879 | 0.5
qwertyu0880 | 0.5
qwertyu0881 | 0.5
qwertyu0882 | 0.5
qwertyu0883 | 0.5
qwertyu0884 | 0.5
qwertyu0885 | 0.5
qwertyu0886 | 0.5
qwertyu0887 | 0.5
qwertyu0889 | 0.5
qwertyu0890 | 0.5
qwertyu0891 | 0.5
qwertyu0892 | 0.5
qwertyu0893 | 0.5
qwertyu0894 | 0.5
qwertyu0895 | 0.5
qwertyu0896 | 0.5
qwertyu0897 | 0.5
qwertyu0898 | 0.5
qwertyu0899 | 0.5
qwertyu1000 | 0.411765
(1000 rows)
select t,similarity(t,'gwertyu0988') as sml from test_trgm where t % 'gwertyu0988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 0.6
qwertyu0980 | 0.411765
qwertyu0981 | 0.411765
qwertyu0982 | 0.411765
qwertyu0983 | 0.411765
qwertyu0984 | 0.411765
qwertyu0985 | 0.411765
qwertyu0986 | 0.411765
qwertyu0987 | 0.411765
qwertyu0989 | 0.411765
qwertyu0088 | 0.333333
qwertyu0098 | 0.333333
qwertyu0188 | 0.333333
qwertyu0288 | 0.333333
qwertyu0388 | 0.333333
qwertyu0488 | 0.333333
qwertyu0588 | 0.333333
qwertyu0688 | 0.333333
qwertyu0788 | 0.333333
qwertyu0888 | 0.333333
qwertyu0900 | 0.333333
qwertyu0901 | 0.333333
qwertyu0902 | 0.333333
qwertyu0903 | 0.333333
qwertyu0904 | 0.333333
qwertyu0905 | 0.333333
qwertyu0906 | 0.333333
qwertyu0907 | 0.333333
qwertyu0908 | 0.333333
qwertyu0909 | 0.333333
qwertyu0910 | 0.333333
qwertyu0911 | 0.333333
qwertyu0912 | 0.333333
qwertyu0913 | 0.333333
qwertyu0914 | 0.333333
qwertyu0915 | 0.333333
qwertyu0916 | 0.333333
qwertyu0917 | 0.333333
qwertyu0918 | 0.333333
qwertyu0919 | 0.333333
qwertyu0920 | 0.333333
qwertyu0921 | 0.333333
qwertyu0922 | 0.333333
qwertyu0923 | 0.333333
qwertyu0924 | 0.333333
qwertyu0925 | 0.333333
qwertyu0926 | 0.333333
qwertyu0927 | 0.333333
qwertyu0928 | 0.333333
qwertyu0929 | 0.333333
qwertyu0930 | 0.333333
qwertyu0931 | 0.333333
qwertyu0932 | 0.333333
qwertyu0933 | 0.333333
qwertyu0934 | 0.333333
qwertyu0935 | 0.333333
qwertyu0936 | 0.333333
qwertyu0937 | 0.333333
qwertyu0938 | 0.333333
qwertyu0939 | 0.333333
qwertyu0940 | 0.333333
qwertyu0941 | 0.333333
qwertyu0942 | 0.333333
qwertyu0943 | 0.333333
qwertyu0944 | 0.333333
qwertyu0945 | 0.333333
qwertyu0946 | 0.333333
qwertyu0947 | 0.333333
qwertyu0948 | 0.333333
qwertyu0949 | 0.333333
qwertyu0950 | 0.333333
qwertyu0951 | 0.333333
qwertyu0952 | 0.333333
qwertyu0953 | 0.333333
qwertyu0954 | 0.333333
qwertyu0955 | 0.333333
qwertyu0956 | 0.333333
qwertyu0957 | 0.333333
qwertyu0958 | 0.333333
qwertyu0959 | 0.333333
qwertyu0960 | 0.333333
qwertyu0961 | 0.333333
qwertyu0962 | 0.333333
qwertyu0963 | 0.333333
qwertyu0964 | 0.333333
qwertyu0965 | 0.333333
qwertyu0966 | 0.333333
qwertyu0967 | 0.333333
qwertyu0968 | 0.333333
qwertyu0969 | 0.333333
qwertyu0970 | 0.333333
qwertyu0971 | 0.333333
qwertyu0972 | 0.333333
qwertyu0973 | 0.333333
qwertyu0974 | 0.333333
qwertyu0975 | 0.333333
qwertyu0976 | 0.333333
qwertyu0977 | 0.333333
qwertyu0978 | 0.333333
qwertyu0979 | 0.333333
qwertyu0990 | 0.333333
qwertyu0991 | 0.333333
qwertyu0992 | 0.333333
qwertyu0993 | 0.333333
qwertyu0994 | 0.333333
qwertyu0995 | 0.333333
qwertyu0996 | 0.333333
qwertyu0997 | 0.333333
qwertyu0998 | 0.333333
qwertyu0999 | 0.333333
(110 rows)
select t,similarity(t,'gwertyu1988') as sml from test_trgm where t % 'gwertyu1988' order by sml desc, t;
t | sml
-------------+----------
qwertyu0988 | 0.333333
(1 row)
select count(*) from test_trgm where t ~ '[qwerty]{2}-?[qwerty]{2}';
count
-------
1000
(1 row)
-- check handling of indexquals that generate no searchable conditions
explain (costs off)
select count(*) from test_trgm where t like '%99%' and t like '%qwerty%';
QUERY PLAN
-----------------------------------------------------------------------------
Aggregate
-> Bitmap Heap Scan on test_trgm
Recheck Cond: ((t ~~ '%99%'::text) AND (t ~~ '%qwerty%'::text))
-> Bitmap Index Scan on trgm_idx
Index Cond: ((t ~~ '%99%'::text) AND (t ~~ '%qwerty%'::text))
(5 rows)
select count(*) from test_trgm where t like '%99%' and t like '%qwerty%';
count
-------
19
(1 row)
explain (costs off)
select count(*) from test_trgm where t like '%99%' and t like '%qw%';
QUERY PLAN
-------------------------------------------------------------------------
Aggregate
-> Bitmap Heap Scan on test_trgm
Recheck Cond: ((t ~~ '%99%'::text) AND (t ~~ '%qw%'::text))
-> Bitmap Index Scan on trgm_idx
Index Cond: ((t ~~ '%99%'::text) AND (t ~~ '%qw%'::text))
(5 rows)
select count(*) from test_trgm where t like '%99%' and t like '%qw%';
count
-------
19
(1 row)
-- ensure that pending-list items are handled correctly, too
create temp table t_test_trgm(t text COLLATE "C");
create index t_trgm_idx on t_test_trgm using gin (t gin_trgm_ops);
insert into t_test_trgm values ('qwerty99'), ('qwerty01');
explain (costs off)
select count(*) from t_test_trgm where t like '%99%' and t like '%qwerty%';
QUERY PLAN
-----------------------------------------------------------------------------
Aggregate
-> Bitmap Heap Scan on t_test_trgm
Recheck Cond: ((t ~~ '%99%'::text) AND (t ~~ '%qwerty%'::text))
-> Bitmap Index Scan on t_trgm_idx
Index Cond: ((t ~~ '%99%'::text) AND (t ~~ '%qwerty%'::text))
(5 rows)
select count(*) from t_test_trgm where t like '%99%' and t like '%qwerty%';
count
-------
1
(1 row)
explain (costs off)
select count(*) from t_test_trgm where t like '%99%' and t like '%qw%';
QUERY PLAN
-------------------------------------------------------------------------
Aggregate
-> Bitmap Heap Scan on t_test_trgm
Recheck Cond: ((t ~~ '%99%'::text) AND (t ~~ '%qw%'::text))
-> Bitmap Index Scan on t_trgm_idx
Index Cond: ((t ~~ '%99%'::text) AND (t ~~ '%qw%'::text))
(5 rows)
select count(*) from t_test_trgm where t like '%99%' and t like '%qw%';
count
-------
1
(1 row)
-- run the same queries with sequential scan to check the results
set enable_bitmapscan=off;
set enable_seqscan=on;
select count(*) from test_trgm where t like '%99%' and t like '%qwerty%';
count
-------
19
(1 row)
select count(*) from test_trgm where t like '%99%' and t like '%qw%';
count
-------
19
(1 row)
select count(*) from t_test_trgm where t like '%99%' and t like '%qwerty%';
count
-------
1
(1 row)
select count(*) from t_test_trgm where t like '%99%' and t like '%qw%';
count
-------
1
(1 row)
reset enable_bitmapscan;
create table test2(t text COLLATE "C");
insert into test2 values ('abcdef');
insert into test2 values ('quark');
insert into test2 values (' z foo bar');
insert into test2 values ('/123/-45/');
create index test2_idx_gin on test2 using gin (t gin_trgm_ops);
set enable_seqscan=off;
explain (costs off)
select * from test2 where t like '%BCD%';
QUERY PLAN
------------------------------------------
Bitmap Heap Scan on test2
Recheck Cond: (t ~~ '%BCD%'::text)
-> Bitmap Index Scan on test2_idx_gin
Index Cond: (t ~~ '%BCD%'::text)
(4 rows)
explain (costs off)
select * from test2 where t ilike '%BCD%';
QUERY PLAN
-------------------------------------------
Bitmap Heap Scan on test2
Recheck Cond: (t ~~* '%BCD%'::text)
-> Bitmap Index Scan on test2_idx_gin
Index Cond: (t ~~* '%BCD%'::text)
(4 rows)
select * from test2 where t like '%BCD%';
t
---
(0 rows)
select * from test2 where t like '%bcd%';
t
--------
abcdef
(1 row)
select * from test2 where t like E'%\\bcd%';
t
--------
abcdef
(1 row)
select * from test2 where t ilike '%BCD%';
t
--------
abcdef
(1 row)
select * from test2 where t ilike 'qua%';
t
-------
quark
(1 row)
select * from test2 where t like '%z foo bar%';
t
-------------
z foo bar
(1 row)
select * from test2 where t like ' z foo%';
t
-------------
z foo bar
(1 row)
explain (costs off)
select * from test2 where t ~ '[abc]{3}';
QUERY PLAN
--------------------------------------------
Bitmap Heap Scan on test2
Recheck Cond: (t ~ '[abc]{3}'::text)
-> Bitmap Index Scan on test2_idx_gin
Index Cond: (t ~ '[abc]{3}'::text)
(4 rows)
explain (costs off)
select * from test2 where t ~* 'DEF';
QUERY PLAN
------------------------------------------
Bitmap Heap Scan on test2
Recheck Cond: (t ~* 'DEF'::text)
-> Bitmap Index Scan on test2_idx_gin
Index Cond: (t ~* 'DEF'::text)
(4 rows)
select * from test2 where t ~ '[abc]{3}';
t
--------
abcdef
(1 row)
select * from test2 where t ~ 'a[bc]+d';
t
--------
abcdef
(1 row)
select * from test2 where t ~ '(abc)*$';
t
-------------
abcdef
quark
z foo bar
/123/-45/
(4 rows)
select * from test2 where t ~* 'DEF';
t
--------
abcdef
(1 row)
select * from test2 where t ~ 'dEf';
t
---
(0 rows)
select * from test2 where t ~* '^q';
t
-------
quark
(1 row)
select * from test2 where t ~* '[abc]{3}[def]{3}';
t
--------
abcdef
(1 row)
select * from test2 where t ~* 'ab[a-z]{3}';
t
--------
abcdef
(1 row)
select * from test2 where t ~* '(^| )qua';
t
-------
quark
(1 row)
select * from test2 where t ~ 'q.*rk$';
t
-------
quark
(1 row)
select * from test2 where t ~ 'q';
t
-------
quark
(1 row)
select * from test2 where t ~ '[a-z]{3}';
t
-------------
abcdef
quark
z foo bar
(3 rows)
select * from test2 where t ~* '(a{10}|b{10}|c{10}){10}';
t
---
(0 rows)
select * from test2 where t ~ 'z foo bar';
t
-------------
z foo bar
(1 row)
select * from test2 where t ~ ' z foo bar';
t
-------------
z foo bar
(1 row)
select * from test2 where t ~ ' z foo bar';
t
-------------
z foo bar
(1 row)
select * from test2 where t ~ ' z foo';
t
-------------
z foo bar
(1 row)
select * from test2 where t ~ 'qua(?!foo)';
t
-------
quark
(1 row)
select * from test2 where t ~ '/\d+/-\d';
t
-----------
/123/-45/
(1 row)
drop index test2_idx_gin;
create index test2_idx_gist on test2 using gist (t gist_trgm_ops);
set enable_seqscan=off;
explain (costs off)
select * from test2 where t like '%BCD%';
QUERY PLAN
------------------------------------------
Index Scan using test2_idx_gist on test2
Index Cond: (t ~~ '%BCD%'::text)
(2 rows)
explain (costs off)
select * from test2 where t ilike '%BCD%';
QUERY PLAN
------------------------------------------
Index Scan using test2_idx_gist on test2
Index Cond: (t ~~* '%BCD%'::text)
(2 rows)
select * from test2 where t like '%BCD%';
t
---
(0 rows)
select * from test2 where t like '%bcd%';
t
--------
abcdef
(1 row)
select * from test2 where t like E'%\\bcd%';
t
--------
abcdef
(1 row)
select * from test2 where t ilike '%BCD%';
t
--------
abcdef
(1 row)
select * from test2 where t ilike 'qua%';
t
-------
quark
(1 row)
select * from test2 where t like '%z foo bar%';
t
-------------
z foo bar
(1 row)
select * from test2 where t like ' z foo%';
t
-------------
z foo bar
(1 row)
explain (costs off)
select * from test2 where t ~ '[abc]{3}';
QUERY PLAN
------------------------------------------
Index Scan using test2_idx_gist on test2
Index Cond: (t ~ '[abc]{3}'::text)
(2 rows)
explain (costs off)
select * from test2 where t ~* 'DEF';
QUERY PLAN
------------------------------------------
Index Scan using test2_idx_gist on test2
Index Cond: (t ~* 'DEF'::text)
(2 rows)
select * from test2 where t ~ '[abc]{3}';
t
--------
abcdef
(1 row)
select * from test2 where t ~ 'a[bc]+d';
t
--------
abcdef
(1 row)
select * from test2 where t ~ '(abc)*$';
t
-------------
abcdef
quark
z foo bar
/123/-45/
(4 rows)
select * from test2 where t ~* 'DEF';
t
--------
abcdef
(1 row)
select * from test2 where t ~ 'dEf';
t
---
(0 rows)
select * from test2 where t ~* '^q';
t
-------
quark
(1 row)
select * from test2 where t ~* '[abc]{3}[def]{3}';
t
--------
abcdef
(1 row)
select * from test2 where t ~* 'ab[a-z]{3}';
t
--------
abcdef
(1 row)
select * from test2 where t ~* '(^| )qua';
t
-------
quark
(1 row)
select * from test2 where t ~ 'q.*rk$';
t
-------
quark
(1 row)
select * from test2 where t ~ 'q';
t
-------
quark
(1 row)
select * from test2 where t ~ '[a-z]{3}';
t
-------------
abcdef
quark
z foo bar
(3 rows)
select * from test2 where t ~* '(a{10}|b{10}|c{10}){10}';
t
---
(0 rows)
select * from test2 where t ~ 'z foo bar';
t
-------------
z foo bar
(1 row)
select * from test2 where t ~ ' z foo bar';
t
-------------
z foo bar
(1 row)
select * from test2 where t ~ ' z foo bar';
t
-------------
z foo bar
(1 row)
select * from test2 where t ~ ' z foo';
t
-------------
z foo bar
(1 row)
select * from test2 where t ~ 'qua(?!foo)';
t
-------
quark
(1 row)
select * from test2 where t ~ '/\d+/-\d';
t
-----------
/123/-45/
(1 row)
-- Check similarity threshold (bug #14202)
CREATE TEMP TABLE restaurants (city text);
INSERT INTO restaurants SELECT 'Warsaw' FROM generate_series(1, 10000);
INSERT INTO restaurants SELECT 'Szczecin' FROM generate_series(1, 10000);
CREATE INDEX ON restaurants USING gist(city gist_trgm_ops);
-- Similarity of the two names (for reference).
SELECT similarity('Szczecin', 'Warsaw');
similarity
------------
0
(1 row)
-- Should get only 'Warsaw' for either setting of set_limit.
EXPLAIN (COSTS OFF)
SELECT DISTINCT city, similarity(city, 'Warsaw'), show_limit()
FROM restaurants WHERE city % 'Warsaw';
QUERY PLAN
-------------------------------------------------------------------
HashAggregate
Group Key: city, similarity(city, 'Warsaw'::text), show_limit()
-> Bitmap Heap Scan on restaurants
Recheck Cond: (city % 'Warsaw'::text)
-> Bitmap Index Scan on restaurants_city_idx
Index Cond: (city % 'Warsaw'::text)
(6 rows)
SELECT set_limit(0.3);
set_limit
-----------
0.3
(1 row)
SELECT DISTINCT city, similarity(city, 'Warsaw'), show_limit()
FROM restaurants WHERE city % 'Warsaw';
city | similarity | show_limit
--------+------------+------------
Warsaw | 1 | 0.3
(1 row)
SELECT set_limit(0.5);
set_limit
-----------
0.5
(1 row)
SELECT DISTINCT city, similarity(city, 'Warsaw'), show_limit()
FROM restaurants WHERE city % 'Warsaw';
city | similarity | show_limit
--------+------------+------------
Warsaw | 1 | 0.5
(1 row)