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unimportant

This commit is contained in:
Cosmin Apreutesei 2021-08-19 17:33:27 +03:00
parent 0d9be36a39
commit adde594b24
1 changed files with 23 additions and 24 deletions
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47
mysql_client.lua
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@ -734,49 +734,48 @@ local function _parse_result_set_header_packet(packet)
return field_count, extra
end
local NOT_NULL_FLAG = 1
local PRI_KEY_FLAG = 2
local UNIQUE_KEY_FLAG = 4
local UNSIGNED_FLAG = 32
local AUTO_INCREMENT_FLAG = 512
local function _parse_field(data, pos)
local s, pos = _from_length_coded_str(data, pos)
s = s and s ~= '' and s:lower() or nil
return s, pos
end
local charset_bytes = {
utf8 = 3,
utf8mb4 = 4,
}
--NOTE: MySQL doesn't give enough info to make editable fields in a UI,
--you'll have to query `information_schema` to get the rest like enum values
--and defaults. So we only keep enough info to format read-only fields in a UI.
local function _parse_field_packet(data)
local col = new_tab(0, 2)
local pos
col.catalog, pos = _parse_field(data, 1)
local col = new_tab(0, 16)
local catalog, pos = _parse_field(data, 1) --always "def"
col.schema, pos = _parse_field(data, pos)
col.table, pos = _parse_field(data, pos)
col.origin_table, pos = _parse_field(data, pos)
col.name, pos = _parse_field(data, pos)
col.origin_name, pos = _parse_field(data, pos)
pos = pos + 1 -- ignore the filler
pos = pos + 1 --ignore the filler
local collation, pos = _get_byte2(data, pos)
col.length, pos = _get_byte4(data, pos)
col.max_char_w, pos = _get_byte4(data, pos)
local buffer_type = buffer_type_names[strbyte(data, pos)]
local text_type_names = collation == 63 and bin_type_names or text_type_names
col.type = text_type_names[buffer_type]
if col.type then
if collation == 63 then
col.type = bin_type_names[buffer_type]
or type_names[buffer_type]
or buffer_type
else
col.type = text_type_names[buffer_type]
col.collation = collation_names[collation]
col.charset = col.collation and col.collation:match'^[^_]+'
else
col.type = type_names[buffer_type] or buffer_type
col.max_char_w = col.max_char_w / (charset_bytes[col.charset] or 1)
end
pos = pos + 1
local flags, pos = _get_byte2(data, pos)
col.not_null = band(flags, NOT_NULL_FLAG ) ~= 0 or nil
col.pri_key = band(flags, PRI_KEY_FLAG ) ~= 0 or nil
col.unique_key = band(flags, UNIQUE_KEY_FLAG ) ~= 0 or nil
col.unsigned = band(flags, UNSIGNED_FLAG ) ~= 0 or nil
col.auto_increment = band(flags, AUTO_INCREMENT_FLAG) ~= 0 or nil
col.decimals = strbyte(data, pos)
pos = pos + 1
col.default = repl(sub(data, pos + 2), '', nil)
col.decimals = strbyte(data, pos) --for formatting only, not for editing!
if col.type ~= 'decimal' and col.decimals == 0x1f then --varchar and floats
col.decimals = nil
end
return col
end