wip: add sqlx setup

This commit is contained in:
Alexander Navarro 2025-01-14 20:24:25 -03:00
parent 57074a89ff
commit 08d3b17381
8 changed files with 312 additions and 7 deletions

1
.gitignore vendored
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@ -7,3 +7,4 @@ secring.*
# Added by cargo
/target
.env

4
.justfile Normal file
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@ -0,0 +1,4 @@
set dotenv-load := true
dev:
cargo run --bin cli -- query "SELECT * FROM sources;"

237
Cargo.lock generated
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@ -1,6 +1,21 @@
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# It is not intended for manual editing.
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@ -49,9 +64,48 @@ checksum = "ca3534e77181a9cc07539ad51f2141fe32f6c3ffd4df76db8ad92346b003ae4e"
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@ -98,6 +152,12 @@ version = "1.0.3"
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@ -110,12 +170,92 @@ version = "1.70.1"
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@ -134,11 +274,58 @@ dependencies = [
"proc-macro2",
]
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@ -158,6 +345,35 @@ dependencies = [
"unicode-ident",
]
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@ -170,6 +386,21 @@ version = "0.2.2"
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@ -5,3 +5,4 @@ edition = "2021"
[dependencies]
clap = { version = "4.5.26", features = ["derive", "env"] }
tokio = {version = "1.43.0", features = ["full"]}

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@ -21,14 +21,33 @@ enum Commands {
},
}
fn main() {
#[tokio::main]
async fn main() {
let cli = Cli::parse();
let url = cli.db_url.unwrap();
// You can check for the existence of subcommands, and if found use their
// matches just as you would the top level cmd
match &cli.command {
Commands::Query { sql } => {
println!("Provided query: {sql:?}");
}
Commands::Query { sql } => handle_query(url, sql).await.unwrap(),
}
}
async fn handle_query(url: String, query: &String) -> Result<(), sqlx::Error> {
let pool = PgPool::connect(url.as_str()).await?;
let mut rows = sqlx::query(query.as_str()).fetch(&pool);
while let Some(row) = rows.try_next().await? {
// map the row into a user-defined domain type
let columns = row.columns();
for col in columns {
let value = String::from(row.get(col.ordinal()));
println!("Column {} value: {}", col.name(), value);
}
}
return Ok(());
}

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@ -0,0 +1 @@
pub mod sql;

1
src/sql.rs Normal file
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@ -0,0 +1 @@
pub mod parser;

47
src/sql/parser.rs Normal file
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@ -0,0 +1,47 @@
/// The postgres-crate does not provide a default mapping to fallback to String for all
/// types: row.get is generic and without a type assignment the FromSql-Trait cannot be inferred.
/// This function matches over the current column-type and does a manual conversion
pub fn reflective_get(row: &Row, index: usize) -> String {
let column_type = row.columns().get(index).map(|c| c.type_().name()).unwrap();
// see https://docs.rs/sqlx/0.4.0-beta.1/sqlx/postgres/types/index.html
let value = match column_type {
"bool" => {
let v = row.get::<_, Option<bool>>(index);
v.map(|v| v.to_string())
}
"varchar" | "char(n)" | "text" | "name" => row.get(index),
"char" => {
let v = row.get::<_, i8>(index);
Some(v.to_string())
}
"smallserial" | "smallint" => {
let v = row.get::<_, Option<i16>>(index);
v.map(|v| v.to_string())
}
"int" | "int4" | "serial" => {
let v = row.get::<_, Option<i32>>(index);
v.map(|v| v.to_string())
}
"int8" | "bigserial" | "bigint" => {
let v = row.get::<_, Option<i64>>(index);
v.map(|v| v.to_string())
}
"float4" | "real" => {
let v = row.get::<_, Option<f32>>(index);
v.map(|v| v.to_string())
}
"float8" | "double precision" => {
let v = row.get::<_, Option<f64>>(index);
v.map(|v| v.to_string())
}
"timestamp" | "timestamptz" => {
// with-chrono feature is needed for this
let v: Option<SystemTime> = row.get(index);
let v = DateTime::<chrono::Utc>::from(v.unwrap());
Some(v.to_string())
}
&_ => Some("CANNOT PARSE".to_string()),
};
value.unwrap_or("null".to_string())
}