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rust
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use std::env; use rocksdb::{ColumnFamilyDescriptor, DB, IteratorMode, Options}; fn col_name(col: i32) -> String { format!("col{}", col) } fn main() { println!("Hello, RocksDB!"); let args: Vec<String> = env::args().collect(); let path = if args.len() > 1 { args.get(1).unwrap().clone() } else { String::from("./data") }; println!("data dir={}", &path); let opts = Options::default(); let mut cfs:Vec<ColumnFamilyDescriptor> = Vec::new(); for col in 33..34 { cfs.push( rocksdb::ColumnFamilyDescriptor::new( col_name(col), opts.clone() )); } let db = DB::open_cf_descriptors_read_only( &opts, &path, cfs, false, ).unwrap(); rocksdb::ColumnFamilyDescriptor::new("col33", opts); let iter = db.iterator(IteratorMode::Start); for (key, value) in iter { println!("Saw {:?} {:?}", key, value); let k = String::from_utf8(key.to_vec()).unwrap(); let v = String::from_utf8(value.to_vec()).unwrap(); println!("Saw {:?} {:?}", k, v); } let _ = DB::destroy(&Options::default(), &path); }
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