sqlx | Powerful SQL syntax expansion , the goal is to create | SQL Database library
kandi X-RAY | sqlx Summary
kandi X-RAY | sqlx Summary
Powerful SQL syntax expansion, the goal is to create "easy to read, easy to write and easy to maintain" sql script | SQL Extension
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Top functions reviewed by kandi - BETA
- Build sqlx files
- Render SQL statement
- Handle sqlx import
- Handles functions
- Build sql code
- Handle variables in SQL code
- Escape characters
- Remove whitespace from content
- Format a SQL statement
- Remove n lines from content
- Make sure that flag is true
- Get the indentation of a string
sqlx Key Features
sqlx Examples and Code Snippets
Lines of Code : 83License : Permissive (MIT)
CopySELECT
a1.avg_price AS `20191209 平均价格`,
a2.avg_price AS `20191212 平均价格`,
(a2.avg_price - a1.avg_price) AS `涨价金额`
FROM
(
-- 求出各类别 20191209 前最后一次报价的平均价格
SELECT
avg(product.price) AS avg_price
FROM
-- mod.sqlx
var colume name
var colume2 score
func good_students(score):
(
SELECT
*
FROM
students
WHERE
score > {score}
) AS good_students
end
import mod
var colume2 age
SELECT -- ! 定义片段
func good_students(score):
(
SELECT
*
FROM
students
WHERE
score > {score}
) AS good_students
end
SELECT name FROM {good_students(80)};
SELECT count(*) FROM {good_studen Community Discussions
Trending Discussions on sqlx
QUESTION
I'm experimenting with Rocket, Rust and SQLx and I'd like to test what happens when two parallel transactions try to insert a duplicated record on my table.
My insert fn contains nothing special and it works fine:
...ANSWER
Answered 2022-Apr-04 at 16:05You can use a async_std::future::timeout or tokio::time::timeout. Example using async_std:
QUESTION
impl<'a, T> ClientDBMain
where
T: FromRow<'a, PgRow>,
{
async fn query_one(&self, pool: &PgPool, query_raw: &str) -> Result {
let res = sqlx::query(query_raw)
.fetch_one(pool)
.await
.map(|r: PgRow| {
// error here
T::from_row(&r).unwrap()
})
.map_err(|err| {
// to save for brevity
})?;
Ok(res)
}
}
ANSWER
Answered 2022-Mar-27 at 02:40r appears to have a 'static lifetime, however since it does not get moved it will be dropped upon falling out of scope at the end of the map. The issue is that FromRow may produce a value referencing r meaning it can not outlive r. Since it appear that the way it does this is probably via 'a, you can probably fix this by requiring T: FromRow<'static, PgRow>. If the resulting type has a 'static lifetime then it would not be reliant of the lifetime of r.
QUESTION
How can I use sqlx struct scan in situations where I am joining tables?
For example, lets say that Person has many Post and I want to get a struct that has a persons posts embedded into it as a slice.
I am imagining a DTO like this:
...ANSWER
Answered 2022-Mar-21 at 15:49Is this accomplishable in sqlx? How?
That's not a feature sqlx has, it isn't an ORM. It's just a convenience wrapper that among other things makes selecting rows into flat structs easier.
You'd either need to process the multiple rows per user yourself, or do two queries, first for the person and then for their posts.
QUESTION
I have probably spent way to much time on this, so I decided to try here.
I'm having trouble figuring out why my Register is being called twice?
Best I can figure, it seems to be calling once at sql.Register() and again at sqlx.Connect(). But if I remove the sql.Register(), then theres no drivers.
Honestly, I am pretty new to GoLang, I'm hoping for any sort of direction here.
Code - w/osql.Register
...ANSWER
Answered 2022-Mar-19 at 19:25The package github.com/lib/pq registers it's driver in an init function.
Remove the direct call to register the driver from the application:
QUESTION
A Rust newbie here, attempting to write a webservice by combining
https://github.com/seanmonstar/warp/blob/master/examples/todos.rs and https://github.com/launchbadge/sqlx/blob/master/examples/postgres/todos/src/main.rs
The following code is in running state. My question is, do I need to clone dbpool for every handler? What's the idiomatic way in Rust (I am coming from Java->Kotlin->Go background, FWIW)
...ANSWER
Answered 2022-Mar-12 at 13:23While copying a pool only increase the reference counter in an Arc and is relatively cheap, as @cdhowie points out, you can avoid it if you fancy doing so: .fetch_all(db) only needs an immutable reference. You could thus pass in a &'static Pool<…>. The one tricky thing is: You can't directly declare a
QUESTION
I have a vendor folder and CI/CD task Linter. Before push the folder to gitlab I did
...ANSWER
Answered 2022-Mar-01 at 14:35The problem was in the settings of golangci modules-download-mode
this solution is set this variable to vendor mode:
QUESTION
I have a table (postgres 12) with the below schema
...ANSWER
Answered 2022-Feb-11 at 20:16try this :
QUESTION
I have multiple similar SQL queries that I need to run in Go code.
Something like this:
ANSWER
Answered 2022-Feb-03 at 00:26Answer taken from here: https://go.dev/doc/database/querying#multiple_rows
Using the Scan method you can assign populate one variable for every query Column of the query result.
Note: the values not populated by scan(), will default to the zero value of the field type.
QUESTION
rows, err := db.NamedQuery(`SELECT ts FROM test_table WHERE ts > '1999-01-08 04:05:06';`, map[string]interface{}{})
ANSWER
Answered 2022-Jan-30 at 15:21why would you use NamedQuery rather than Query?
Queries that use named parameters are easier for the human to parse.
How does one typically write such a query
QUESTION
I'm trying to retrieve mysql variables with gorm:
...ANSWER
Answered 2022-Jan-29 at 13:22Describe fields with gorm tag as described in https://gorm.io/docs/models.html
Example:
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Install sqlx
You can use sqlx like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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