Struct opendal::services::Postgresql
source · pub struct Postgresql { /* private fields */ }
services-postgresql
only.Expand description
PostgreSQL services support.
§Capabilities
This service can be used to:
- stat
- read
- write
- create_dir
- delete
- copy
- rename
-
list - scan
-
presign - blocking
§Configuration
root
: Set the working directory ofOpenDAL
connection_string
: Set the connection string of postgres servertable
: Set the table of postgresqlkey_field
: Set the key field of postgresqlvalue_field
: Set the value field of postgresql
§Example
§Via Builder
use anyhow::Result;
use opendal::services::Postgresql;
use opendal::Operator;
#[tokio::main]
async fn main() -> Result<()> {
let mut builder = Postgresql::default();
builder.root("/");
builder.connection_string("postgresql://you_username:your_password@127.0.0.1:5432/your_database");
builder.table("your_table");
// key field type in the table should be compatible with Rust's &str like text
builder.key_field("key");
// value field type in the table should be compatible with Rust's Vec<u8> like bytea
builder.value_field("value");
let op = Operator::new(builder)?.finish();
Ok(())
}
Implementations§
source§impl PostgresqlBuilder
impl PostgresqlBuilder
sourcepub fn connection_string(&mut self, v: &str) -> &mut Self
pub fn connection_string(&mut self, v: &str) -> &mut Self
Set the connection_string of the postgresql service.
This connection string is libpq-style connection strings
. There are two formats:
§Key Value
This format consists of space-separated key-value pairs. Values which are either the empty string or contain whitespace should be wrapped in ’. ’ and \ characters should be backslash-escaped.
host=localhost user=postgres connect_timeout=10 keepalives=0
host=/var/lib/postgresql,localhost port=1234 user=postgres password='password with spaces'
host=host1,host2,host3 port=1234,,5678 user=postgres target_session_attrs=read-write
Available keys could found at: https://docs.rs/postgres/latest/postgres/config/struct.Config.html
§Url
This format resembles a URL with a scheme of either postgres://
or postgresql://
.
postgresql://user@localhost
postgresql://user:password@%2Fvar%2Flib%2Fpostgresql/mydb?connect_timeout=10
postgresql://user@host1:1234,host2,host3:5678?target_session_attrs=read-write
postgresql:///mydb?user=user&host=/var/lib/postgresql
§Notes
If connection_string has been specified, other parameters will be ignored.
For more information, please visit https://docs.rs/postgres/latest/postgres/config/struct.Config.html
sourcepub fn root(&mut self, root: &str) -> &mut Self
pub fn root(&mut self, root: &str) -> &mut Self
set the working directory, all operations will be performed under it.
default: “/”
sourcepub fn table(&mut self, table: &str) -> &mut Self
pub fn table(&mut self, table: &str) -> &mut Self
Set the table name of the postgresql service to read/write.
sourcepub fn key_field(&mut self, key_field: &str) -> &mut Self
pub fn key_field(&mut self, key_field: &str) -> &mut Self
Set the key field name of the postgresql service to read/write.
Default to key
if not specified.
sourcepub fn value_field(&mut self, value_field: &str) -> &mut Self
pub fn value_field(&mut self, value_field: &str) -> &mut Self
Set the value field name of the postgresql service to read/write.
Default to value
if not specified.
Trait Implementations§
source§impl Builder for PostgresqlBuilder
impl Builder for PostgresqlBuilder
source§impl Debug for PostgresqlBuilder
impl Debug for PostgresqlBuilder
source§impl Default for PostgresqlBuilder
impl Default for PostgresqlBuilder
source§fn default() -> PostgresqlBuilder
fn default() -> PostgresqlBuilder
Auto Trait Implementations§
impl Freeze for PostgresqlBuilder
impl RefUnwindSafe for PostgresqlBuilder
impl Send for PostgresqlBuilder
impl Sync for PostgresqlBuilder
impl Unpin for PostgresqlBuilder
impl UnwindSafe for PostgresqlBuilder
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