Function codegen_delete 

pub fn codegen_delete(
    b: &mut ProgramBuilder,
    stmt: &DeleteStatement,
    schema: &[TableSchema],
    _ctx: &CodegenContext,
) -> Result<(), CodegenError>

Generate VDBE bytecode for a DELETE statement.

Pattern: DELETE FROM t WHERE rowid = ?

Init → Transaction(write) → Variable → OpenWrite → NotExists → Delete → Close → Halt