unimportant

mysql_client.lua

@@ -463,7 +463,7 @@ local int_ranges = {
 local conn = {}
 local conn_mt = {__index = conn}
 
-local from_text_converters = {
+local to_lua = {
 	tinyint   = tonumber,
 	shortint  = tonumber,
 	mediumint = tonumber,
@@ -472,7 +472,15 @@ local from_text_converters = {
 	year      = tonumber,
 	float     = tonumber,
 	double    = tonumber,
+	decimal   = tonumber,
 }
+function mysql.to_lua(v, col)
+	local to_lua = to_lua[col.type]
+	if to_lua then
+		v = to_lua(v)
+	end
+	return v
+end
 
 local function return_arg1(v) return v end
 
@@ -888,10 +896,10 @@ local function get_field_packet(buf)
 	local col = {}
 	local _              = get_name(buf) --always "def"
 	col.schema           = get_name(buf)
-	col.table            = get_name(buf)
-	col.origin_table     = get_name(buf)
-	col.name             = get_name(buf)
-	col.origin_name      = get_name(buf)
+	col.table_alias      = get_name(buf)
+	col.table            = get_name(buf) --name of origin table
+	col.name             = get_name(buf) --alias column name
+	col.col              = get_name(buf) --name of column in origin table
 	local _              = get_uint(buf) --0x0c
 	local collation      = get_u16(buf)
 	col.max_char_w       = get_u32(buf)
@@ -918,7 +926,7 @@ local function get_field_packet(buf)
 	return col
 end
 
-local function recv_field_packets(self, field_count)
+local function recv_field_packets(self, field_count, field_attrs)
 	local fields = {}
 	for i = 1, field_count do
 		local typ, buf = recv_packet(self)
@@ -927,6 +935,9 @@ local function recv_field_packets(self, field_count)
 		field.index = i
 		fields[i] = field
 		fields[field.name] = field
+		if field_attrs then
+			update(field, field_attrs[field.name])
+		end
 	end
 	if field_count > 0 then
 		local typ, buf = recv_packet(self)
@@ -1026,6 +1037,7 @@ function mysql.connect(opt)
 	end
 	check(self, typ == 'OK', 'bad packet type')
 
+	self.to_lua = mysql.to_lua
 	self.state = 'ready'
 
 	if opt.collation == 'server' then
@@ -1035,6 +1047,7 @@ function mysql.connect(opt)
 	self.charset_is_ascii_superset = self.charset and not mb_charsets[self.charset]
 	self.schema = opt.schema
 	self.user = opt.user
+	self.host_port = host .. ':' .. port
 
 	return self
 end
@@ -1090,14 +1103,16 @@ local function read_result(self, opt)
 	local field_count = get_uint(buf)
 	local extra = buf_len(buf) > 0 and get_uint(buf) or nil
 
-	local cols = recv_field_packets(self, field_count)
+	local cols = recv_field_packets(self, field_count, opt and opt.field_attrs)
 
-	local compact     = opt and opt.compact
-	local to_array    = opt and opt.to_array and #cols == 1
-	local null_value  = opt and opt.null_value
-	local datetime_format = opt and opt.datetime_format
-	local date_format     = opt and opt.date_format
-	local time_format     = opt and opt.time_format
+	local compact         = opt and opt.compact
+	local to_array        = opt and opt.to_array and #cols == 1
+	local sopt = opt or self
+	local null_value      = sopt.null_value
+	local datetime_format = sopt.datetime_format
+	local date_format     = sopt.date_format
+	local time_format     = sopt.time_format
+	local to_lua          = sopt.to_lua
 
 	local rows = {}
 	local i = 0
@@ -1162,10 +1177,7 @@ local function read_result(self, opt)
 			for i, col in ipairs(cols) do
 				local v = get_str(buf)
 				if v ~= nil then
-					local convert = from_text_converters[col.type]
-					if convert then
-						v = convert(v)
-					end
+					v = to_lua(v, col)
 				else
 					v = null_value
 				end
@@ -1229,8 +1241,8 @@ function conn:prepare(query, opt)
 	local param_count  = get_u16(buf)
 	buf(1) --filler
 	stmt.warning_count = get_u16(buf)
-	stmt.params = recv_field_packets(self, param_count)
-	stmt.cols = recv_field_packets(self, col_count)
+	stmt.params = recv_field_packets(self, param_count, opt and opt.param_attrs)
+	stmt.cols = recv_field_packets(self, col_count, opt and opt.field_attrs)
 	stmt.cursor = assert(cursor_types[opt and opt.cursor or 'none'])
 	return stmt
 end

mysql_client.md

@@ -59,6 +59,7 @@ The `options` argument is a Lua table holding the following keys:
   "ssl disabled on server" is returned.
   * `ssl_verify`: if `true`, then verifies the validity of the server SSL
   certificate (default is `false`).
+  * `to_lua = f(v, col) -> v` -- custom value converter (defaults to `mysql.to_lua`).
 
 ### `cn:close() -> 1 | nil,err`
 
@@ -72,37 +73,24 @@ Returns the bytes successfully sent out. Use `read_result()` to read the replies
 
 ### `cn:read_result([options]) -> res,nil|'again',cols | nil,err,errcode,sqlstate`
 
-Reads in one result returned from the server.
-
-It returns a Lua table (`res`) describing the MySQL `OK packet`
-or `result set packet` for the query result.
-
-For queries corresponding to a result set, it returns an array holding all the rows.
+Reads in the next result set returned from the server.
 
 The `options` arg can contain:
 
   * `compact   = true` -- return an array of arrays instead of an array of `{column->value}` maps.
   * `to_array  = true` -- return an array of values for single-column results.
   * `null_value = val` -- value to use for `null` (defaults to `nil`).
+  * `to_lua = f(v, col) -> v` -- custom value converter.
 
-For queries that do not correspond to a result set, it returns a Lua table like this:
+For queries that return a result set, it returns an array of rows.
+For other queries it returns a Lua table with information such as
+the autoincrement value if any and the affected rows.
 
-```lua
-    {
-        insert_id = 0,
-        server_status = 2,
-        warning_count = 1,
-        affected_rows = 32,
-        message = nil
-    }
-```
-
-If more results are following the current result, a second `err` return value
-will be given the string `again`. One should always check this (second) return
-value and if it is `again`, then she should call this method again to retrieve
-more results. This usually happens when the original query contains multiple
-statements (separated by semicolon in the same query string) or calling a
-MySQL procedure.
+If more results are following the current result, a second return value
+`'again'` is returned. One should always check this value and call this
+method again to retrieve more results. This usually happens when the original
+query contains multiple statements (separated by semicolon in the same
+query string) or calling a stored procedure.
 
 In case of errors, this method returns at most 4 values: `nil`, `err`, `errcode`, and `sqlstate`.
 The `err` return value contains a string describing the error, the `errcode`
@@ -111,6 +99,9 @@ the `sqlstate` return value contains the standard SQL error code that consists
 of 5 characters. Note that, the `errcode` and `sqlstate` might be `nil`
 if MySQL does not return them.
 
+NOTE: 64 bit integers and decimals are converted to Lua numbers by default.
+That limits the useful integer range of number types to ±2^51 or 15 digits.
+
 ### `cn:query(query, [options]) -> res,nil,cols | nil,err,errcode,sqlstate`
 
 This is a shortcut for combining the [send_query](#send_query) call