add ProgramBuilderFlags to the builder

core/vdbe/builder.rs

@@ -1,5 +1,6 @@
 use std::{cell::Cell, cmp::Ordering, rc::Rc, sync::Arc};
 
+use bitflags::bitflags;
 use tracing::{instrument, Level};
 use turso_sqlite3_parser::ast::{self, TableInternalId};
 
@@ -110,6 +111,7 @@ pub struct ProgramBuilder {
     nested_level: usize,
     init_label: BranchOffset,
     start_offset: BranchOffset,
+    flags: ProgramBuilderFlags,
 }
 
 #[derive(Debug, Clone)]
@@ -133,6 +135,12 @@ pub enum QueryMode {
     Explain,
 }
 
+bitflags! {
+    pub struct ProgramBuilderFlags: u8 {
+        const CaptureChanges = 0x01; /* emit plans with capture changes instructurs for INSERT/DELETE/UPDATE operations */
+    }
+}
+
 impl From<ast::Cmd> for QueryMode {
     fn from(stmt: ast::Cmd) -> Self {
         match stmt {
@@ -149,7 +157,11 @@ pub struct ProgramBuilderOpts {
 }
 
 impl ProgramBuilder {
-    pub fn new(query_mode: QueryMode, opts: ProgramBuilderOpts) -> Self {
+    pub fn new(
+        query_mode: QueryMode,
+        flags: ProgramBuilderFlags,
+        opts: ProgramBuilderOpts,
+    ) -> Self {
         Self {
             table_reference_counter: TableRefIdCounter::new(),
             next_free_register: 1,
@@ -172,9 +184,14 @@ impl ProgramBuilder {
             // These labels will be filled when `prologue()` is called
             init_label: BranchOffset::Placeholder,
             start_offset: BranchOffset::Placeholder,
+            flags,
         }
     }
 
+    pub fn flags(&self) -> &ProgramBuilderFlags {
+        &self.flags
+    }
+
     pub fn extend(&mut self, opts: &ProgramBuilderOpts) {
         self.insns.reserve(opts.approx_num_insns);
         self.cursor_ref.reserve(opts.num_cursors);