feat(postgres): add quote_ident/quote_literal for DDL

src/domain/postgres/connection.rs

@@ -122,6 +122,14 @@ pub(crate) fn pg_restore_binary_name() -> &'static str {
     }
 }
 
+pub(crate) fn quote_ident(s: &str) -> String {
+    format!("\"{}\"", s.replace('"', "\"\""))
+}
+
+pub(crate) fn quote_literal(s: &str) -> String {
+    format!("'{}'", s.replace('\'', "''"))
+}
+
 pub(crate) fn pg_dump_exists_in(dir: &std::path::Path) -> bool {
     dir.join(pg_dump_binary_name()).is_file()
 }

src/tests/domain/postgres.rs

@@ -383,3 +383,20 @@ mod select_pg_path_tests {
         }
     }
 }
+
+mod quoting_tests {
+    use crate::domain::postgres::connection::{quote_ident, quote_literal};
+
+    #[test]
+    fn quote_ident_escapes_double_quotes() {
+        assert_eq!(quote_ident("devdb"), "\"devdb\"");
+        assert_eq!(quote_ident("a\"b"), "\"a\"\"b\"");
+        assert_eq!(quote_ident("drop\"; --"), "\"drop\"\"; --\"");
+    }
+
+    #[test]
+    fn quote_literal_escapes_single_quotes() {
+        assert_eq!(quote_literal("UTF8"), "'UTF8'");
+        assert_eq!(quote_literal("O'Brien"), "'O''Brien'");
+    }
+}