zinc-observe initial commit

examples/sqlparser.rs

@@ -0,0 +1,36 @@
+use sqlparser::dialect::GenericDialect;
+use sqlparser::parser::Parser;
+
+fn main() {
+    let sql = "SELECT a, b, 123, myfunc(b) \
+           FROM table_1 \
+           WHERE a > b AND b < 100 AND (c = 1 or b = 2) \
+           ORDER BY a DESC, b ASC limit 10,0 ";
+
+    let dialect = GenericDialect {}; // or AnsiDialect, or your own dialect ...
+
+    let parse_result = Parser::parse_sql(&dialect, sql);
+    let ast = match parse_result {
+        Ok(stmt) => stmt,
+        Err(e) => {
+            println!("err {:?}", e);
+            vec![]
+        }
+    };
+
+    let query = ast
+        .iter()
+        .filter_map(|stmt| match stmt {
+            sqlparser::ast::Statement::Query(q) => Some(q),
+            _ => None,
+        })
+        .next()
+        .unwrap();
+
+    // println!("AST: {:?}", query);
+
+    println!("SQL->body: {:?}", query.body);
+    println!("SQL->order_by: {:?}", query.order_by);
+    println!("SQL->limit: {:?}", query.limit);
+    println!("SQL->offset: {:?}", query.offset);
+}