PostgreSQL - Format() Named parameters?
I have the following function that takes a table name as parameter and returns the table:
CREATE FUNCTION func(tab_name varchar) RETURNS TABLE (
col text,
col2 text
) AS $$
BEGIN
RETURN QUERY
EXECUTE format('SELECT * FROM %I', tab_name);
END;
$$
LANGUAGE plpgsql;
Suppose instead, I wanted to do return the table 100 times:
CREATE FUNCTION func(tab_name varchar) RETURNS TABLE (
col text,
col2 text
) AS $$
BEGIN
RETURN QUERY
EXECUTE format('
SELECT * FROM %I
UNION ALL
SELECT * FROM %I,
UNION ALL
SELECT * FROM %I
......
', tab_name, tab_name, tab_name,.....);
END;
$$
LANGUAGE plpgsql;
Instead of putting tab_name 100 times is there some way to use named parameters?
sql database postgresql
asked Nov 23 at 0:09
Legend123
2915
add a comment |
I have the following function that takes a table name as parameter and returns the table:
CREATE FUNCTION func(tab_name varchar) RETURNS TABLE (
col text,
col2 text
) AS $$
BEGIN
RETURN QUERY
EXECUTE format('SELECT * FROM %I', tab_name);
END;
$$
LANGUAGE plpgsql;
Suppose instead, I wanted to do return the table 100 times:
CREATE FUNCTION func(tab_name varchar) RETURNS TABLE (
col text,
col2 text
) AS $$
BEGIN
RETURN QUERY
EXECUTE format('
SELECT * FROM %I
UNION ALL
SELECT * FROM %I,
UNION ALL
SELECT * FROM %I
......
', tab_name, tab_name, tab_name,.....);
END;
$$
LANGUAGE plpgsql;
Instead of putting tab_name 100 times is there some way to use named parameters?
sql database postgresql
asked Nov 23 at 0:09
Legend123
2915
add a comment |
I have the following function that takes a table name as parameter and returns the table:
CREATE FUNCTION func(tab_name varchar) RETURNS TABLE (
col text,
col2 text
) AS $$
BEGIN
RETURN QUERY
EXECUTE format('SELECT * FROM %I', tab_name);
END;
$$
LANGUAGE plpgsql;
Suppose instead, I wanted to do return the table 100 times:
CREATE FUNCTION func(tab_name varchar) RETURNS TABLE (
col text,
col2 text
) AS $$
BEGIN
RETURN QUERY
EXECUTE format('
SELECT * FROM %I
UNION ALL
SELECT * FROM %I,
UNION ALL
SELECT * FROM %I
......
', tab_name, tab_name, tab_name,.....);
END;
$$
LANGUAGE plpgsql;
Instead of putting tab_name 100 times is there some way to use named parameters?
sql database postgresql
asked Nov 23 at 0:09
Legend123
2915
I have the following function that takes a table name as parameter and returns the table:
CREATE FUNCTION func(tab_name varchar) RETURNS TABLE (
col text,
col2 text
) AS $$
BEGIN
RETURN QUERY
EXECUTE format('SELECT * FROM %I', tab_name);
END;
$$
LANGUAGE plpgsql;
Suppose instead, I wanted to do return the table 100 times:
CREATE FUNCTION func(tab_name varchar) RETURNS TABLE (
col text,
col2 text
) AS $$
BEGIN
RETURN QUERY
EXECUTE format('
SELECT * FROM %I
UNION ALL
SELECT * FROM %I,
UNION ALL
SELECT * FROM %I
......
', tab_name, tab_name, tab_name,.....);
END;
$$
LANGUAGE plpgsql;
Instead of putting tab_name 100 times is there some way to use named parameters?
sql database postgresql
sql database postgresql
asked Nov 23 at 0:09
Legend123
2915
asked Nov 23 at 0:09
Legend123
2915
asked Nov 23 at 0:09
Legend123
2915
asked Nov 23 at 0:09
Legend123
2915
asked Nov 23 at 0:09
Legend123
2915
2915
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You can indicate the position of an argument and use an argument multiple times, e.g.
select format('%2$s - %1$s - %2$s', 'first', 'second');
format
-------------------------
second - first - second
(1 row)
Read more in the documentation.
answered Nov 23 at 0:36
klin
55.6k54775
add a comment |
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%2f53439296%2fpostgresql-format-named-parameters%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can indicate the position of an argument and use an argument multiple times, e.g.
select format('%2$s - %1$s - %2$s', 'first', 'second');
format
-------------------------
second - first - second
(1 row)
Read more in the documentation.
answered Nov 23 at 0:36
klin
55.6k54775
add a comment |
You can indicate the position of an argument and use an argument multiple times, e.g.
select format('%2$s - %1$s - %2$s', 'first', 'second');
format
-------------------------
second - first - second
(1 row)
Read more in the documentation.
answered Nov 23 at 0:36
klin
55.6k54775
add a comment |
You can indicate the position of an argument and use an argument multiple times, e.g.
select format('%2$s - %1$s - %2$s', 'first', 'second');
format
-------------------------
second - first - second
(1 row)
Read more in the documentation.
answered Nov 23 at 0:36
klin
55.6k54775
You can indicate the position of an argument and use an argument multiple times, e.g.
select format('%2$s - %1$s - %2$s', 'first', 'second');
format
-------------------------
second - first - second
(1 row)
Read more in the documentation.
answered Nov 23 at 0:36
klin
55.6k54775
answered Nov 23 at 0:36
klin
55.6k54775
answered Nov 23 at 0:36
klin
55.6k54775
answered Nov 23 at 0:36
klin
55.6k54775
55.6k54775
add a comment |
add a comment |
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%2f53439296%2fpostgresql-format-named-parameters%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
