Mixing
Postgresql except with like-filtering
I have a table with a trigger that populates a text column with space delimited search critera for the row, eg "Opel Astra 2.0" from the manufacturer, model, engine_size colums. I can essentially query with "Opel 2.0" by doing a
select c.*
from car c
where not exists (
select unnest(string_to_array('Opel 2.0', ' ')) except
select unnest(string_to_array(c.search_criteria, ' '))
)
but I've found no way to make wildcards match so that I could search just for 'Ope' and get a hit on the Opel.
I've also tried something like
exists (
select *
from
unnest(array_remove(string_to_array('Opel 2.0', ' '), '')) a,
unnest(array_remove(string_to_array(c.search_criteria, ' '), '')) b
where b like '%' || a|| '%'
)
but that solution is "or" instead of "and" even though wildcards work.
Any suggestions for a "generic search" like this?
Thanks in advance,
Nik
postgresql
asked Nov 19 '18 at 17:09
Nicklas Karlsson
51118
add a comment |
I have a table with a trigger that populates a text column with space delimited search critera for the row, eg "Opel Astra 2.0" from the manufacturer, model, engine_size colums. I can essentially query with "Opel 2.0" by doing a
select c.*
from car c
where not exists (
select unnest(string_to_array('Opel 2.0', ' ')) except
select unnest(string_to_array(c.search_criteria, ' '))
)
but I've found no way to make wildcards match so that I could search just for 'Ope' and get a hit on the Opel.
I've also tried something like
exists (
select *
from
unnest(array_remove(string_to_array('Opel 2.0', ' '), '')) a,
unnest(array_remove(string_to_array(c.search_criteria, ' '), '')) b
where b like '%' || a|| '%'
)
but that solution is "or" instead of "and" even though wildcards work.
Any suggestions for a "generic search" like this?
Thanks in advance,
Nik
postgresql
asked Nov 19 '18 at 17:09
Nicklas Karlsson
51118
Does something like this help? stackoverflow.com/questions/53344875/… Otherwise can you give examples showing the values you're looking to match and what the outcome should be for each?
– 404
Nov 19 '18 at 17:27
add a comment |
I have a table with a trigger that populates a text column with space delimited search critera for the row, eg "Opel Astra 2.0" from the manufacturer, model, engine_size colums. I can essentially query with "Opel 2.0" by doing a
select c.*
from car c
where not exists (
select unnest(string_to_array('Opel 2.0', ' ')) except
select unnest(string_to_array(c.search_criteria, ' '))
)
but I've found no way to make wildcards match so that I could search just for 'Ope' and get a hit on the Opel.
I've also tried something like
exists (
select *
from
unnest(array_remove(string_to_array('Opel 2.0', ' '), '')) a,
unnest(array_remove(string_to_array(c.search_criteria, ' '), '')) b
where b like '%' || a|| '%'
)
but that solution is "or" instead of "and" even though wildcards work.
Any suggestions for a "generic search" like this?
Thanks in advance,
Nik
postgresql
asked Nov 19 '18 at 17:09
Nicklas Karlsson
51118
I have a table with a trigger that populates a text column with space delimited search critera for the row, eg "Opel Astra 2.0" from the manufacturer, model, engine_size colums. I can essentially query with "Opel 2.0" by doing a
select c.*
from car c
where not exists (
select unnest(string_to_array('Opel 2.0', ' ')) except
select unnest(string_to_array(c.search_criteria, ' '))
)
but I've found no way to make wildcards match so that I could search just for 'Ope' and get a hit on the Opel.
I've also tried something like
exists (
select *
from
unnest(array_remove(string_to_array('Opel 2.0', ' '), '')) a,
unnest(array_remove(string_to_array(c.search_criteria, ' '), '')) b
where b like '%' || a|| '%'
)
but that solution is "or" instead of "and" even though wildcards work.
Any suggestions for a "generic search" like this?
Thanks in advance,
Nik
postgresql
postgresql
asked Nov 19 '18 at 17:09
Nicklas Karlsson
51118
asked Nov 19 '18 at 17:09
Nicklas Karlsson
51118
edited Nov 19 '18 at 17:55
asked Nov 19 '18 at 17:09
Nicklas Karlsson
51118
asked Nov 19 '18 at 17:09
Nicklas Karlsson
51118
asked Nov 19 '18 at 17:09
Nicklas Karlsson
51118
51118
Does something like this help? stackoverflow.com/questions/53344875/… Otherwise can you give examples showing the values you're looking to match and what the outcome should be for each?
– 404
Nov 19 '18 at 17:27
add a comment |
Does something like this help? stackoverflow.com/questions/53344875/… Otherwise can you give examples showing the values you're looking to match and what the outcome should be for each?
– 404
Nov 19 '18 at 17:27
Does something like this help? stackoverflow.com/questions/53344875/… Otherwise can you give examples showing the values you're looking to match and what the outcome should be for each?
– 404
Nov 19 '18 at 17:27
Does something like this help? stackoverflow.com/questions/53344875/… Otherwise can you give examples showing the values you're looking to match and what the outcome should be for each?
– 404
Nov 19 '18 at 17:27
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53379559%2fpostgresql-except-with-like-filtering%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53379559%2fpostgresql-except-with-like-filtering%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Does something like this help? stackoverflow.com/questions/53344875/… Otherwise can you give examples showing the values you're looking to match and what the outcome should be for each?
– 404
Nov 19 '18 at 17:27