| 6 | use crate::error::SqlError; |
| 7 | |
| 8 | pub(super) fn parse_clone_database( |
| 9 | parts: &[&str], |
| 10 | upper: &str, |
| 11 | ) -> Result<NodedbStatement, SqlError> { |
| 12 | let new_name = parts |
| 13 | .get(2) |
| 14 | .copied() |
| 15 | .ok_or_else(|| SqlError::Parse { |
| 16 | detail: "CLONE DATABASE requires a target name".into(), |
| 17 | })? |
| 18 | .trim_matches('"') |
| 19 | .to_string(); |
| 20 | let from_idx = parts |
| 21 | .iter() |
| 22 | .position(|w| w.to_uppercase() == "FROM") |
| 23 | .ok_or_else(|| SqlError::Parse { |
| 24 | detail: "CLONE DATABASE requires FROM <source>".into(), |
| 25 | })?; |
| 26 | let source_name = parts |
| 27 | .get(from_idx + 1) |
| 28 | .copied() |
| 29 | .ok_or_else(|| SqlError::Parse { |
| 30 | detail: "CLONE DATABASE FROM requires a source name".into(), |
| 31 | })? |
| 32 | .trim_matches('"') |
| 33 | .to_string(); |
| 34 | |
| 35 | // Determine the AS OF clause. |
| 36 | // Accepted forms: |
| 37 | // (no AS OF) → Latest |
| 38 | // AS OF SYSTEM TIME LATEST → Latest |
| 39 | // AS OF SYSTEM TIME <ms> → SystemTimeMs(<ms>) |
| 40 | let as_of = if upper.contains("AS OF SYSTEM TIME") { |
| 41 | let ms_idx = parts |
| 42 | .iter() |
| 43 | .position(|w| w.to_uppercase() == "AS") |
| 44 | .and_then(|i| { |
| 45 | if parts.get(i + 1).map(|w| w.to_uppercase()).as_deref() == Some("OF") |
| 46 | && parts.get(i + 2).map(|w| w.to_uppercase()).as_deref() == Some("SYSTEM") |
| 47 | && parts.get(i + 3).map(|w| w.to_uppercase()).as_deref() == Some("TIME") |
| 48 | { |
| 49 | Some(i + 4) |
| 50 | } else { |
| 51 | None |
| 52 | } |
| 53 | }); |
| 54 | match ms_idx { |
| 55 | Some(idx) => match parts.get(idx) { |
| 56 | Some(tok) if tok.to_uppercase() == "LATEST" => CloneAsOf::Latest, |
| 57 | Some(ms_str) => { |
| 58 | let ms = ms_str.parse::<i64>().map_err(|_| SqlError::Parse { |
| 59 | detail: format!( |
| 60 | "CLONE DATABASE AS OF SYSTEM TIME: expected integer milliseconds \ |
| 61 | or LATEST, got '{ms_str}'" |
| 62 | ), |
| 63 | })?; |
| 64 | CloneAsOf::SystemTimeMs(ms) |
| 65 | } |