feat(fuzz): add insert target (#3499)

* fix(common-time): allow building nanos timestamp from parts split from i64::MIN

Signed-off-by: Zhenchi <zhongzc_arch@outlook.com>

* feat(fuzz): add insert target

Signed-off-by: Zhenchi <zhongzc_arch@outlook.com>

* chore: cleanup cargo.toml and polish comments

Signed-off-by: Zhenchi <zhongzc_arch@outlook.com>

---------

Signed-off-by: Zhenchi <zhongzc_arch@outlook.com>

tests-fuzz/targets/fuzz_insert.rs

@@ -0,0 +1,163 @@
+// Copyright 2023 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#![no_main]
+
+use std::sync::Arc;
+
+use common_telemetry::info;
+use libfuzzer_sys::arbitrary::{Arbitrary, Unstructured};
+use libfuzzer_sys::fuzz_target;
+use rand::{Rng, SeedableRng};
+use rand_chacha::ChaChaRng;
+use snafu::{ensure, ResultExt};
+use sqlx::{Executor, MySql, Pool};
+use tests_fuzz::context::{TableContext, TableContextRef};
+use tests_fuzz::error::{self, Result};
+use tests_fuzz::fake::{
+    merge_two_word_map_fn, random_capitalize_map, uppercase_and_keyword_backtick_map,
+    MappedGenerator, WordGenerator,
+};
+use tests_fuzz::generator::create_expr::CreateTableExprGeneratorBuilder;
+use tests_fuzz::generator::insert_expr::InsertExprGeneratorBuilder;
+use tests_fuzz::generator::Generator;
+use tests_fuzz::ir::{CreateTableExpr, InsertIntoExpr};
+use tests_fuzz::translator::mysql::create_expr::CreateTableExprTranslator;
+use tests_fuzz::translator::mysql::insert_expr::InsertIntoExprTranslator;
+use tests_fuzz::translator::DslTranslator;
+use tests_fuzz::utils::{init_greptime_connections, Connections};
+
+struct FuzzContext {
+    greptime: Pool<MySql>,
+}
+
+impl FuzzContext {
+    async fn close(self) {
+        self.greptime.close().await;
+    }
+}
+
+#[derive(Copy, Clone, Debug)]
+struct FuzzInput {
+    seed: u64,
+    columns: usize,
+    rows: usize,
+}
+
+impl Arbitrary<'_> for FuzzInput {
+    fn arbitrary(u: &mut Unstructured<'_>) -> arbitrary::Result<Self> {
+        let seed = u.int_in_range(u64::MIN..=u64::MAX)?;
+        let mut rng = ChaChaRng::seed_from_u64(seed);
+        let columns = rng.gen_range(2..30);
+        let rows = rng.gen_range(1..4096);
+        Ok(FuzzInput {
+            columns,
+            rows,
+            seed,
+        })
+    }
+}
+
+fn generate_create_expr<R: Rng + 'static>(
+    input: FuzzInput,
+    rng: &mut R,
+) -> Result<CreateTableExpr> {
+    let create_table_generator = CreateTableExprGeneratorBuilder::default()
+        .name_generator(Box::new(MappedGenerator::new(
+            WordGenerator,
+            merge_two_word_map_fn(random_capitalize_map, uppercase_and_keyword_backtick_map),
+        )))
+        .columns(input.columns)
+        .engine("mito")
+        .build()
+        .unwrap();
+    create_table_generator.generate(rng)
+}
+
+fn generate_insert_expr<R: Rng + 'static>(
+    input: FuzzInput,
+    rng: &mut R,
+    table_ctx: TableContextRef,
+) -> Result<InsertIntoExpr> {
+    let insert_generator = InsertExprGeneratorBuilder::default()
+        .table_ctx(table_ctx)
+        .rows(input.rows)
+        .build()
+        .unwrap();
+    insert_generator.generate(rng)
+}
+
+async fn execute_insert(ctx: FuzzContext, input: FuzzInput) -> Result<()> {
+    info!("input: {input:?}");
+    let mut rng = ChaChaRng::seed_from_u64(input.seed);
+
+    let create_expr = generate_create_expr(input, &mut rng)?;
+    let translator = CreateTableExprTranslator;
+    let sql = translator.translate(&create_expr)?;
+    let _result = sqlx::query(&sql)
+        .execute(&ctx.greptime)
+        .await
+        .context(error::ExecuteQuerySnafu { sql: &sql })?;
+
+    let table_ctx = Arc::new(TableContext::from(&create_expr));
+    let insert_expr = generate_insert_expr(input, &mut rng, table_ctx)?;
+    let translator = InsertIntoExprTranslator;
+    let sql = translator.translate(&insert_expr)?;
+    let result = ctx
+        .greptime
+        // unprepared query, see <https://github.com/GreptimeTeam/greptimedb/issues/3500>
+        .execute(sql.as_str())
+        .await
+        .context(error::ExecuteQuerySnafu { sql: &sql })?;
+
+    ensure!(
+        result.rows_affected() == input.rows as u64,
+        error::AssertSnafu {
+            reason: format!(
+                "expected rows affected: {}, actual: {}",
+                input.rows,
+                result.rows_affected(),
+            )
+        }
+    );
+
+    // TODO: Validate inserted rows
+
+    // Cleans up
+    let sql = format!("DROP TABLE {}", create_expr.table_name);
+    let result = sqlx::query(&sql)
+        .execute(&ctx.greptime)
+        .await
+        .context(error::ExecuteQuerySnafu { sql })?;
+    info!(
+        "Drop table: {}\n\nResult: {result:?}\n\n",
+        create_expr.table_name
+    );
+    ctx.close().await;
+
+    Ok(())
+}
+
+fuzz_target!(|input: FuzzInput| {
+    common_telemetry::init_default_ut_logging();
+    common_runtime::block_on_write(async {
+        let Connections { mysql } = init_greptime_connections().await;
+        let ctx = FuzzContext {
+            greptime: mysql.expect("mysql connection init must be succeed"),
+        };
+        execute_insert(ctx, input)
+            .await
+            .unwrap_or_else(|err| panic!("fuzz test must be succeed: {err:?}"));
+    })
+});