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This commit is contained in:
Cosmin Apreutesei 2021-08-23 22:54:29 +03:00
parent 27382e197d
commit 4162da7432
2 changed files with 17 additions and 7 deletions
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16
mysql_client.lua
View File

@ -1087,13 +1087,13 @@ end
local stmt = {}
local cursor_types = {
no_cursor = 0x00,
none = 0x00,
read_only = 0x01,
update = 0x02,
scrollable = 0x04,
}
function conn:prepare(query, cursor_type)
function conn:prepare(query, opt)
assert(self.state == 'ready')
self.packet_no = -1
local buf = send_buffer(1 + #query)
@ -1115,7 +1115,7 @@ function conn:prepare(query, cursor_type)
stmt.warning_count = get_u16(buf)
stmt.params = recv_field_packets(self, param_count)
stmt.cols = recv_field_packets(self, col_count)
stmt.cursor_type = assert(cursor_types[cursor_type or 'no_cursor'])
stmt.cursor = assert(cursor_types[opt and opt.cursor or 'none'])
return stmt
end
conn.prepare = protect(conn.prepare)
@ -1138,7 +1138,7 @@ function stmt:exec(...)
local buf = send_buffer(64)
set_u8(buf, COM_STMT_EXECUTE)
set_u32(buf, stmt.id)
set_u8(buf, stmt.cursor_type)
set_u8(buf, stmt.cursor)
set_u32(buf, 1) --iteration-count, must be 1
if #stmt.params > 0 then
local nulls_len = math.floor((#stmt.params + 7) / 8)
@ -1215,6 +1215,14 @@ function stmt:exec(...)
end
stmt.exec = protect(stmt.exec)
local function pass(self, opt, ok, ...)
if not ok then return nil, ... end
return self.conn:read_result(opt)
end
function stmt:query(opt, ...)
return pass(self, opt, self:exec(...))
end
local qmap = {
['\0' ] = '\\0',
['\b' ] = '\\b',

8
mysql_client.md
View File

@ -2,7 +2,7 @@
## `local mysql = require'mysql_client'`
MySQL client protocol in Lua.
Stolen from OpenResty and modified to work standalone.
Stolen from OpenResty, modified to work with [sock] and added prepared statements.
## Example
@ -119,9 +119,11 @@ success because this method will only call [read_result](#read_result)
once for you.
### `cn:prepare(query) -> stmt`
### `cn:prepare(query, [opt]) -> stmt`
Prepare a statement.
Prepare a statement. Options can contain:
* `cursor`: 'read_only', 'update', 'scrollabe', 'none' (default: 'none').
### `stmt:exec(params...)`