- implement DROP TABLE support, toggled off from generation for now

- clean up the query generation/printing by separating it into different files and removing duplications

simulator/model/query/delete.rs

@@ -0,0 +1,35 @@
+use std::fmt::Display;
+
+use serde::{Deserialize, Serialize};
+
+use crate::{model::table::Value, SimulatorEnv};
+
+use super::select::Predicate;
+
+#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+pub(crate) struct Delete {
+    pub(crate) table: String,
+    pub(crate) predicate: Predicate,
+}
+
+impl Delete {
+    pub(crate) fn shadow(&self, env: &mut SimulatorEnv) -> Vec<Vec<Value>> {
+        let table = env
+            .tables
+            .iter_mut()
+            .find(|t| t.name == self.table)
+            .unwrap();
+
+        let t2 = table.clone();
+
+        table.rows.retain_mut(|r| self.predicate.test(r, &t2));
+
+        vec![]
+    }
+}
+
+impl Display for Delete {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "DELETE FROM {} WHERE {}", self.table, self.predicate)
+    }
+}