Struct Stmt 

#[repr(C)]
pub struct Stmt {
    pub _conn: *mut c_void,
    pub _ctx: *mut c_void,
    pub _bind_args_fn: unsafe extern "C" fn(ctx: *mut Stmt, idx: i32, arg: Value) -> ResultCode,
    pub _step: unsafe extern "C" fn(ctx: *mut Stmt) -> ResultCode,
    pub _get_row_values: unsafe extern "C" fn(ctx: *mut Stmt),
    pub _get_column_names: unsafe extern "C" fn(ctx: *mut Stmt, count: *mut i32) -> *mut *mut c_char,
    pub _free_current_row: unsafe extern "C" fn(ctx: *mut Stmt),
    pub _close: unsafe extern "C" fn(ctx: *mut Stmt),
    pub current_row: *mut Value,
    pub current_row_len: i32,
}

Internal/core use only Extensions should not import or use this type directly

Fields

_conn: *mut c_void

_ctx: *mut c_void

_bind_args_fn: unsafe extern "C" fn(ctx: *mut Stmt, idx: i32, arg: Value) -> ResultCode

_step: unsafe extern "C" fn(ctx: *mut Stmt) -> ResultCode

_get_row_values: unsafe extern "C" fn(ctx: *mut Stmt)

_get_column_names: unsafe extern "C" fn(ctx: *mut Stmt, count: *mut i32) -> *mut *mut c_char

_free_current_row: unsafe extern "C" fn(ctx: *mut Stmt)

_close: unsafe extern "C" fn(ctx: *mut Stmt)

current_row: *mut Value

current_row_len: i32

Implementations

impl Stmt

pub fn new( conn: *mut c_void, ctx: *mut c_void, bind: unsafe extern "C" fn(ctx: *mut Stmt, idx: i32, arg: Value) -> ResultCode, step: unsafe extern "C" fn(ctx: *mut Stmt) -> ResultCode, rows: unsafe extern "C" fn(ctx: *mut Stmt), names: unsafe extern "C" fn(ctx: *mut Stmt, count: *mut i32) -> *mut *mut c_char, free_row: unsafe extern "C" fn(ctx: *mut Stmt), close: unsafe extern "C" fn(ctx: *mut Stmt), ) -> Self

pub fn close(&mut self)

Close the statement

pub unsafe fn from_ptr(ptr: *mut Stmt) -> ExtResult<&'static mut Self>

Safety

Derefs a null ptr, does a null check first

pub fn to_ptr(&self) -> *mut Stmt

Returns the pointer to the statement.

pub unsafe fn free_current_row(&mut self)

Free the memory for the values obtained from the get_row method. This is easier done on core side because __free_internal_type is ‘core_only’ feature to prevent extensions causing memory issues.

Safety

This fn is unsafe because it derefs a raw pointer after null and length checks. This fn should only be called with the pointer returned from get_row.

pub fn get_row(&self) -> &[Value]

Returns the values from the current row in the prepared statement, should be called after the step() method returns StepResult::Row

pub fn get_column_names(&self) -> Vec<String>

Returns the names of the result columns for the prepared statement.