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Add comment about re-entrancy of op_idx_insert()

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Jussi Saurio
2025-06-12 12:36:53 +03:00
parent bdbd021bbb
commit 04c590f5a6
1 changed files with 5 additions and 0 deletions
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5
core/vdbe/execute.rs
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@@ -4077,6 +4077,11 @@ pub fn op_idx_insert(
// a) nothing, or
// b) the first entry greater than the key we are inserting.
// In both cases, we can insert the new entry without moving again.
//
// This is re-entrant, because once we call cursor.insert() with moved_before=true,
// we will immediately set BTreeCursor::state to CursorState::Write(WriteInfo::new()),
// in BTreeCursor::insert_into_page; thus, if this function is called again,
// moved_before will again be true due to cursor.is_write_in_progress() returning true.
true
} else {
flags.has(IdxInsertFlags::USE_SEEK)