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mysql.lua
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--[=[
Async MySQL client protocol.
Written by Cosmin Apreutesei. Public domain.
Original code by Yichun Zhang (agentzh). BSD license.
Field metadata is consistent with sqlpp.lua, schema.lua and x-nav.js.
No compression or fancy auth supported.
CONNECTING
[try_]mysql_connect(opt) -> ok | nil,err,[errcode],[sqlstate]
host : server's IP address (required).
port : server's port (optional, defaults to 3306).
user : user name (optional).
pass[word] : password (optional).
db : the database to set as current database (optional).
charset : the character set used for the connection (required if no collation).
collation : the collation used for the connection (required if no charset).
max_packet_size: max reply packet size (defaults to 16 MB).
ssl : enable SSL (false). returns 'no_ssl' if disabled by server.
ssl_verify : check server's SSL certificate (false).
to_lua : value converter `f(v, col) -> v` (defaults to `mysql_to_lua`).
cn:[try_]close() Close connection.
cn:[try_]closed() Check if the connection was closed.
cn.server_ver Get server version.
QUERYING
cn:[try_]send_query(sql) -> bytes | nil,err
Execute query. Must be followed by one or more calls to read_result().
cn:[try_]read_result([opt]) -> res,nil|'again',cols | nil,err,errcode,sqlstate
Read in the next result returned from the server. 'again' signals
that more results are coming in which case read_result() must be called
again until all results are received. For non-select queries the result
is a table with insert_id, affected_rows, etc.
compact : return {{v1,...},...} instead of {{col->val},...}.
NOTE: unless you set `null_value`, the rows in compact mode will
be sparse arrays so `ipairs(row)` and `#row` won't work on them!
to_array : return an array of values for single-column results.
null_value : value to use for `null` (defaults to `nil`).
field_attrs : supply extra field attributes. It can also be a function
which will be called as `f(cn, fields, opt)` as soon as field
metadata is received but before rows are received (so you can set
a custom `mysql_to_lua` converter for particular fields).
dry : `true` to print query instead of executing it, and return true.
cn:[try_]query(query, [opt]) -> res,nil|'again',cols | nil,err,errcode,sqlstate
Calls `send_query()` followed by a single call to `read_result()`.
cn:[try_]use([db], [opt]) -> true | nil,err,...
Change current database
cn:[try_]start_transaction() start transaction
cn:[try_]end_transaction('commit'|'rollback') end transaction
cn:[try_]commit() commit
cn:[try_]rollback() rollback
cn:in_transaction() -> true|false check if in transaction
PREPARED STATEMENTS
cn:[try_]prepare(query, [opt]) -> stmt
Prepare a statement.
cursor: 'read_only', 'update', 'scrollabe', 'none' (default: 'none').
stmt:[try_]exec(params...)
Execute a statement. Call cn:read_result() to get results.
stmt:[try_]free() Free statement.
ESCAPING
mysql_escape_utf8(s) -> s
Escape string to be used inside SQL string literals. Only works on
connections for which the charset is ASCII or an ASCII superset (ascii, utf8).
cn:esc(s) -> s
Escape string to be used inside SQL string literals.
CONVERSION
mysql_datetime_to_timestamp(sql_datetime_string[, utc]) -> t
mysql_timestamp_to_datetime(t[, utc]) -> sql_datetime_string
mysql_time_to_seconds(sql_time_string) -> s
mysql_seconds_to_time(s) -> sql_time_string
NOTE: Decimals with up to 15 digits of precision and 64 bit integers are
converted to Lua numbers by default. That limits the useful range of integer
types to 15 significant digits. If you have other needs, provide your own
converter function which can be set as either:
- mysql_to_lua,
- query_options.field_attrs.FIELD_NAME.mysql_to_lua,
- schema.TABLE.COL.mysql_to_lua.
]=]
if not ... then require'mysql_test'; return end
require'sock'
require'glue'
require'sha1'
local
floor, ceil, tonumber, index, repl, update, trim, starts, isstr, isfunc =
floor, ceil, tonumber, index, repl, update, trim, starts, isstr, isfunc
local
band, xor, bor, shl, shr, u8a, copy, dynarray =
band, xor, bor, shl, shr, u8a, copy, dynarray
local COM_QUIT = 0x01
local COM_QUERY = 0x03
local COM_STMT_PREPARE = 0x16
local COM_STMT_EXECUTE = 0x17
local COM_STMT_CLOSE = 0x19
local CLIENT_SSL = 0x0800
local SERVER_MORE_RESULTS_EXISTS = 8
local collation_names = {
[ 1] = 'big5_chinese_ci',
[ 2] = 'latin2_czech_cs',
[ 3] = 'dec8_swedish_ci',
[ 4] = 'cp850_general_ci',
[ 5] = 'latin1_german1_ci',
[ 6] = 'hp8_english_ci',
[ 7] = 'koi8r_general_ci',
[ 8] = 'latin1_swedish_ci',
[ 9] = 'latin2_general_ci',
[ 10] = 'swe7_swedish_ci',
[ 11] = 'ascii_general_ci',
[ 12] = 'ujis_japanese_ci',
[ 13] = 'sjis_japanese_ci',
[ 14] = 'cp1251_bulgarian_ci',
[ 15] = 'latin1_danish_ci',
[ 16] = 'hebrew_general_ci',
[ 18] = 'tis620_thai_ci',
[ 19] = 'euckr_korean_ci',
[ 20] = 'latin7_estonian_cs',
[ 21] = 'latin2_hungarian_ci',
[ 22] = 'koi8u_general_ci',
[ 23] = 'cp1251_ukrainian_ci',
[ 24] = 'gb2312_chinese_ci',
[ 25] = 'greek_general_ci',
[ 26] = 'cp1250_general_ci',
[ 27] = 'latin2_croatian_ci',
[ 28] = 'gbk_chinese_ci',
[ 29] = 'cp1257_lithuanian_ci',
[ 30] = 'latin5_turkish_ci',
[ 31] = 'latin1_german2_ci',
[ 32] = 'armscii8_general_ci',
[ 33] = 'utf8_general_ci',
[ 34] = 'cp1250_czech_cs',
[ 35] = 'ucs2_general_ci',
[ 36] = 'cp866_general_ci',
[ 37] = 'keybcs2_general_ci',
[ 38] = 'macce_general_ci',
[ 39] = 'macroman_general_ci',
[ 40] = 'cp852_general_ci',
[ 41] = 'latin7_general_ci',
[ 42] = 'latin7_general_cs',
[ 43] = 'macce_bin',
[ 44] = 'cp1250_croatian_ci',
[ 45] = 'utf8mb4_general_ci',
[ 46] = 'utf8mb4_bin',
[ 47] = 'latin1_bin',
[ 48] = 'latin1_general_ci',
[ 49] = 'latin1_general_cs',
[ 50] = 'cp1251_bin',
[ 51] = 'cp1251_general_ci',
[ 52] = 'cp1251_general_cs',
[ 53] = 'macroman_bin',
[ 54] = 'utf16_general_ci',
[ 55] = 'utf16_bin',
[ 56] = 'utf16le_general_ci',
[ 57] = 'cp1256_general_ci',
[ 58] = 'cp1257_bin',
[ 59] = 'cp1257_general_ci',
[ 60] = 'utf32_general_ci',
[ 61] = 'utf32_bin',
[ 62] = 'utf16le_bin',
[ 63] = 'binary',
[ 64] = 'armscii8_bin',
[ 65] = 'ascii_bin',
[ 66] = 'cp1250_bin',
[ 67] = 'cp1256_bin',
[ 68] = 'cp866_bin',
[ 69] = 'dec8_bin',
[ 70] = 'greek_bin',
[ 71] = 'hebrew_bin',
[ 72] = 'hp8_bin',
[ 73] = 'keybcs2_bin',
[ 74] = 'koi8r_bin',
[ 75] = 'koi8u_bin',
[ 76] = 'utf8_tolower_ci',
[ 77] = 'latin2_bin',
[ 78] = 'latin5_bin',
[ 79] = 'latin7_bin',
[ 80] = 'cp850_bin',
[ 81] = 'cp852_bin',
[ 82] = 'swe7_bin',
[ 83] = 'utf8_bin',
[ 84] = 'big5_bin',
[ 85] = 'euckr_bin',
[ 86] = 'gb2312_bin',
[ 87] = 'gbk_bin',
[ 88] = 'sjis_bin',
[ 89] = 'tis620_bin',
[ 90] = 'ucs2_bin',
[ 91] = 'ujis_bin',
[ 92] = 'geostd8_general_ci',
[ 93] = 'geostd8_bin',
[ 94] = 'latin1_spanish_ci',
[ 95] = 'cp932_japanese_ci',
[ 96] = 'cp932_bin',
[ 97] = 'eucjpms_japanese_ci',
[ 98] = 'eucjpms_bin',
[ 99] = 'cp1250_polish_ci',
[101] = 'utf16_unicode_ci',
[102] = 'utf16_icelandic_ci',
[103] = 'utf16_latvian_ci',
[104] = 'utf16_romanian_ci',
[105] = 'utf16_slovenian_ci',
[106] = 'utf16_polish_ci',
[107] = 'utf16_estonian_ci',
[108] = 'utf16_spanish_ci',
[109] = 'utf16_swedish_ci',
[110] = 'utf16_turkish_ci',
[111] = 'utf16_czech_ci',
[112] = 'utf16_danish_ci',
[113] = 'utf16_lithuanian_ci',
[114] = 'utf16_slovak_ci',
[115] = 'utf16_spanish2_ci',
[116] = 'utf16_roman_ci',
[117] = 'utf16_persian_ci',
[118] = 'utf16_esperanto_ci',
[119] = 'utf16_hungarian_ci',
[120] = 'utf16_sinhala_ci',
[121] = 'utf16_german2_ci',
[122] = 'utf16_croatian_ci',
[123] = 'utf16_unicode_520_ci',
[124] = 'utf16_vietnamese_ci',
[128] = 'ucs2_unicode_ci',
[129] = 'ucs2_icelandic_ci',
[130] = 'ucs2_latvian_ci',
[131] = 'ucs2_romanian_ci',
[132] = 'ucs2_slovenian_ci',
[133] = 'ucs2_polish_ci',
[134] = 'ucs2_estonian_ci',
[135] = 'ucs2_spanish_ci',
[136] = 'ucs2_swedish_ci',
[137] = 'ucs2_turkish_ci',
[138] = 'ucs2_czech_ci',
[139] = 'ucs2_danish_ci',
[140] = 'ucs2_lithuanian_ci',
[141] = 'ucs2_slovak_ci',
[142] = 'ucs2_spanish2_ci',
[143] = 'ucs2_roman_ci',
[144] = 'ucs2_persian_ci',
[145] = 'ucs2_esperanto_ci',
[146] = 'ucs2_hungarian_ci',
[147] = 'ucs2_sinhala_ci',
[148] = 'ucs2_german2_ci',
[149] = 'ucs2_croatian_ci',
[150] = 'ucs2_unicode_520_ci',
[151] = 'ucs2_vietnamese_ci',
[159] = 'ucs2_general_mysql500_ci',
[160] = 'utf32_unicode_ci',
[161] = 'utf32_icelandic_ci',
[162] = 'utf32_latvian_ci',
[163] = 'utf32_romanian_ci',
[164] = 'utf32_slovenian_ci',
[165] = 'utf32_polish_ci',
[166] = 'utf32_estonian_ci',
[167] = 'utf32_spanish_ci',
[168] = 'utf32_swedish_ci',
[169] = 'utf32_turkish_ci',
[170] = 'utf32_czech_ci',
[171] = 'utf32_danish_ci',
[172] = 'utf32_lithuanian_ci',
[173] = 'utf32_slovak_ci',
[174] = 'utf32_spanish2_ci',
[175] = 'utf32_roman_ci',
[176] = 'utf32_persian_ci',
[177] = 'utf32_esperanto_ci',
[178] = 'utf32_hungarian_ci',
[179] = 'utf32_sinhala_ci',
[180] = 'utf32_german2_ci',
[181] = 'utf32_croatian_ci',
[182] = 'utf32_unicode_520_ci',
[183] = 'utf32_vietnamese_ci',
[192] = 'utf8_unicode_ci',
[193] = 'utf8_icelandic_ci',
[194] = 'utf8_latvian_ci',
[195] = 'utf8_romanian_ci',
[196] = 'utf8_slovenian_ci',
[197] = 'utf8_polish_ci',
[198] = 'utf8_estonian_ci',
[199] = 'utf8_spanish_ci',
[200] = 'utf8_swedish_ci',
[201] = 'utf8_turkish_ci',
[202] = 'utf8_czech_ci',
[203] = 'utf8_danish_ci',
[204] = 'utf8_lithuanian_ci',
[205] = 'utf8_slovak_ci',
[206] = 'utf8_spanish2_ci',
[207] = 'utf8_roman_ci',
[208] = 'utf8_persian_ci',
[209] = 'utf8_esperanto_ci',
[210] = 'utf8_hungarian_ci',
[211] = 'utf8_sinhala_ci',
[212] = 'utf8_german2_ci',
[213] = 'utf8_croatian_ci',
[214] = 'utf8_unicode_520_ci',
[215] = 'utf8_vietnamese_ci',
[223] = 'utf8_general_mysql500_ci',
[224] = 'utf8mb4_unicode_ci',
[225] = 'utf8mb4_icelandic_ci',
[226] = 'utf8mb4_latvian_ci',
[227] = 'utf8mb4_romanian_ci',
[228] = 'utf8mb4_slovenian_ci',
[229] = 'utf8mb4_polish_ci',
[230] = 'utf8mb4_estonian_ci',
[231] = 'utf8mb4_spanish_ci',
[232] = 'utf8mb4_swedish_ci',
[233] = 'utf8mb4_turkish_ci',
[234] = 'utf8mb4_czech_ci',
[235] = 'utf8mb4_danish_ci',
[236] = 'utf8mb4_lithuanian_ci',
[237] = 'utf8mb4_slovak_ci',
[238] = 'utf8mb4_spanish2_ci',
[239] = 'utf8mb4_roman_ci',
[240] = 'utf8mb4_persian_ci',
[241] = 'utf8mb4_esperanto_ci',
[242] = 'utf8mb4_hungarian_ci',
[243] = 'utf8mb4_sinhala_ci',
[244] = 'utf8mb4_german2_ci',
[245] = 'utf8mb4_croatian_ci',
[246] = 'utf8mb4_unicode_520_ci',
[247] = 'utf8mb4_vietnamese_ci',
[248] = 'gb18030_chinese_ci',
[249] = 'gb18030_bin',
[250] = 'gb18030_unicode_520_ci',
[255] = 'utf8mb4_0900_ai_ci',
[256] = 'utf8mb4_de_pb_0900_ai_ci',
[257] = 'utf8mb4_is_0900_ai_ci',
[258] = 'utf8mb4_lv_0900_ai_ci',
[259] = 'utf8mb4_ro_0900_ai_ci',
[260] = 'utf8mb4_sl_0900_ai_ci',
[261] = 'utf8mb4_pl_0900_ai_ci',
[262] = 'utf8mb4_et_0900_ai_ci',
[263] = 'utf8mb4_es_0900_ai_ci',
[264] = 'utf8mb4_sv_0900_ai_ci',
[265] = 'utf8mb4_tr_0900_ai_ci',
[266] = 'utf8mb4_cs_0900_ai_ci',
[267] = 'utf8mb4_da_0900_ai_ci',
[268] = 'utf8mb4_lt_0900_ai_ci',
[269] = 'utf8mb4_sk_0900_ai_ci',
[270] = 'utf8mb4_es_trad_0900_ai_ci',
[271] = 'utf8mb4_la_0900_ai_ci',
[273] = 'utf8mb4_eo_0900_ai_ci',
[274] = 'utf8mb4_hu_0900_ai_ci',
[275] = 'utf8mb4_hr_0900_ai_ci',
[277] = 'utf8mb4_vi_0900_ai_ci',
[278] = 'utf8mb4_0900_as_cs',
[279] = 'utf8mb4_de_pb_0900_as_cs',
[280] = 'utf8mb4_is_0900_as_cs',
[281] = 'utf8mb4_lv_0900_as_cs',
[282] = 'utf8mb4_ro_0900_as_cs',
[283] = 'utf8mb4_sl_0900_as_cs',
[284] = 'utf8mb4_pl_0900_as_cs',
[285] = 'utf8mb4_et_0900_as_cs',
[286] = 'utf8mb4_es_0900_as_cs',
[287] = 'utf8mb4_sv_0900_as_cs',
[288] = 'utf8mb4_tr_0900_as_cs',
[289] = 'utf8mb4_cs_0900_as_cs',
[290] = 'utf8mb4_da_0900_as_cs',
[291] = 'utf8mb4_lt_0900_as_cs',
[292] = 'utf8mb4_sk_0900_as_cs',
[293] = 'utf8mb4_es_trad_0900_as_cs',
[294] = 'utf8mb4_la_0900_as_cs',
[296] = 'utf8mb4_eo_0900_as_cs',
[297] = 'utf8mb4_hu_0900_as_cs',
[298] = 'utf8mb4_hr_0900_as_cs',
[300] = 'utf8mb4_vi_0900_as_cs',
[303] = 'utf8mb4_ja_0900_as_cs',
[304] = 'utf8mb4_ja_0900_as_cs_ks',
[305] = 'utf8mb4_0900_as_ci',
[306] = 'utf8mb4_ru_0900_ai_ci',
[307] = 'utf8mb4_ru_0900_as_cs',
[308] = 'utf8mb4_zh_0900_as_cs',
[309] = 'utf8mb4_0900_bin',
}
local collation_codes = index(collation_names)
local default_collations = {
big5 = 'big5_chinese_ci',
dec8 = 'dec8_swedish_ci',
cp850 = 'cp850_general_ci',
hp8 = 'hp8_english_ci',
koi8r = 'koi8r_general_ci',
latin1 = 'latin1_swedish_ci',
latin2 = 'latin2_general_ci',
swe7 = 'swe7_swedish_ci',
ascii = 'ascii_general_ci',
ujis = 'ujis_japanese_ci',
sjis = 'sjis_japanese_ci',
hebrew = 'hebrew_general_ci',
tis620 = 'tis620_thai_ci',
euckr = 'euckr_korean_ci',
koi8u = 'koi8u_general_ci',
gb2312 = 'gb2312_chinese_ci',
greek = 'greek_general_ci',
cp1250 = 'cp1250_general_ci',
gbk = 'gbk_chinese_ci',
latin5 = 'latin5_turkish_ci',
armscii8 = 'armscii8_general_ci',
utf8 = 'utf8_general_ci',
ucs2 = 'ucs2_general_ci',
cp866 = 'cp866_general_ci',
keybcs2 = 'keybcs2_general_ci',
macce = 'macce_general_ci',
macroman = 'macroman_general_ci',
cp852 = 'cp852_general_ci',
latin7 = 'latin7_general_ci',
cp1251 = 'cp1251_general_ci',
utf16 = 'utf16_general_ci',
utf16le = 'utf16le_general_ci',
cp1256 = 'cp1256_general_ci',
cp1257 = 'cp1257_general_ci',
utf32 = 'utf32_general_ci',
binary = 'binary',
geostd8 = 'geostd8_general_ci',
cp932 = 'cp932_japanese_ci',
eucjpms = 'eucjpms_japanese_ci',
gb18030 = 'gb18030_chinese_ci',
utf8mb4 = 'utf8mb4_0900_ai_ci',
}
local mb_charsets = { --excluding ASCII supersets i.e. utf8* charsets.
big5=1,
sjis=1,
euckr=1,
gb2312=1,
gbk=1,
ucs2=1,
cp932=1,
ujis=1,
eucjpms=1,
utf16=1,
utf16le=1,
utf32=1,
gb18030=1,
}
local max_char_widths = {
utf8 = 3,
utf8mb4 = 4,
big5 = 2,
sjis = 2,
euckr = 2,
gb2312 = 2,
gbk = 2,
ucs2 = 2,
cp932 = 2,
ujis = 3, --eukjp
eucjpms = 3,
utf16 = 4,
utf16le = 4,
utf32 = 4,
gb18030 = 2,
}
local buffer_type_names = {
[ 0] = 'decimal',
[ 1] = 'tiny',
[ 2] = 'short',
[ 3] = 'long',
[ 4] = 'float',
[ 5] = 'double',
[ 6] = 'null',
[ 7] = 'timestamp',
[ 8] = 'longlong',
[ 9] = 'int24',
[ 10] = 'date',
[ 11] = 'time',
[ 12] = 'datetime',
[ 13] = 'year',
[ 15] = 'varchar',
[ 16] = 'bit',
[246] = 'newdecimal',
[247] = 'enum',
[248] = 'set',
[249] = 'tiny_blob',
[250] = 'medium_blob',
[251] = 'long_blob',
[252] = 'blob',
[253] = 'var_string',
[254] = 'string',
[255] = 'geometry',
}
local bin_types = {
tiny = 'tinyint',
short = 'smallint',
int24 = 'mediumint',
long = 'int',
longlong = 'bigint',
newdecimal = 'decimal',
tiny_blob = 'tinyblob', --always selected as blob
medium_blob = 'mediumblob', --always selected as blob
long_blob = 'longblob', --always selected as blob
var_string = 'varbinary',
string = 'binary',
}
local text_types = {
tiny_blob = 'tinytext', --always selected as text
medium_blob = 'mediumtext', --always selected as text
long_blob = 'longtext', --always selected as text
blob = 'text',
var_string = 'varchar',
string = 'char',
}
local string_types = {
string=1,
varchar=1,
var_string=1,
enum=1,
set=1,
blob=1,
tiny_blob=1,
medium_blob=1,
long_blob=1,
geometry=1,
bit=1,
decimal=1,
newdecimal=1,
}
local int_ranges = {
tinyint = {1, -(2^ 7-1), 2^ 7, 0, 2^ 8-1},
smallint = {2, -(2^15-1), 2^15, 0, 2^16-1},
mediumint = {3, -(2^23-1), 2^23, 0, 2^24-1},
int = {4, -(2^31-1), 2^31, 0, 2^32-1},
bigint = {8, -(2^51-1), 2^51, 0, 2^52-1},
}
local conn = {}
local conn_mt = {__index = conn}
function ismysqlconn(x)
return getmetatable(x) == conn_mt
end
local function return_arg1(v) return v end
assert(ffi.abi'le')
local function buf_len(buf)
local _, _, n = buf()
buf(-n)
return n
end
local function get_u8(buf)
local p, i = buf(1)
return p[i]
end
local function get_i8(buf)
local p, i = buf(1)
return cast(i8p, p+i)[0]
end
local function get_u16(buf)
local p, i = buf(2)
return cast(u16p, p+i)[0]
end
local function get_i16(buf)
local p, i = buf(2)
return cast(i16p, p+i)[0]
end
local function get_u24(buf)
local p, i = buf(3)
local a, b, c = p[i], p[i+1], p[i+2]
return bor(a, shl(b, 8), shl(c, 16))
end
local function get_u32(buf)
local p, i = buf(4)
return cast(u32p, p+i)[0]
end
local function get_i32(buf)
local p, i = buf(4)
return cast(i32p, p+i)[0]
end
local function get_u64(buf)
local p, i = buf(8)
return tonumber(cast(u64p, p+i)[0])
end
local function get_i64(buf)
local p, i = buf(8)
return tonumber(cast(i64p, p+i)[0])
end
local function get_f64(buf)
local p, i = buf(8)
return tonumber(cast(f64p, p+i)[0])
end
local function get_f32(buf)
local p, i = buf(4)
return tonumber(cast(f32p, p+i)[0])
end
local function get_uint(buf) --length-encoded int
local c = get_u8(buf)
if c < 0xfb then
return c
elseif c == 0xfb then --NULL string
return nil
elseif c == 0xfc then
return get_u16(buf)
elseif c == 0xfd then
return get_u24(buf)
elseif c == 0xfe then
return get_u64(buf)
else
buf(1/0, 'invalid length-encoded int')
end
end
local function get_cstring(buf)
local p, i0 = buf(0)
while true do
local _, i = buf(1)
if p[i] == 0 then
return str(p+i0, i-i0)
end
i = i + 1
end
end
local function get_str(buf) --length-encoded string
local slen = get_uint(buf)
if not slen then return nil end
local p, i = buf(slen)
return str(p+i, slen)
end
local function get_bytes(buf, len) --fixed-length string
local p, i, len = buf(len)
return str(p+i, len)
end
local function get_datetime(buf, date_format)
local len = get_u8(buf)
if len == 0 then
return date_format == '*t'
and {year = 0, month = 0, day = 0}
or date_format and format(date_format, 0, 0, 0, 0, 0, 0, 0)
or '0000-00-00'
end
local y = get_u16(buf)
local m = get_u8(buf)
local d = get_u8(buf)
if len == 4 then
return date_format == '*t'
and {year = y, month = m, day = d}
or format(date_format or '%04d-%02d-%02d', y, m, d, 0, 0, 0, 0)
end
local H = get_u8(buf)
local M = get_u8(buf)
local S = get_u8(buf)
local ms = len == 7 and 0 or get_u32(buf)
return date_format == '*t'
and {year = y, month = m, day = d, hour = H, min = M, sec = S + ms / 10^6}
or format(date_format or (len == 7
and '%04d-%02d-%02d %02d:%02d:%02d'
or '%04d-%02d-%02d %02d:%02d:%02d.%06d'),
y, m, d, H, M, S, ms)
end
local function get_time(buf, time_format)
local len = get_u8(buf)
if len == 0 then
return {days = 0, hour = 0, min = 0, sec = 0}
end
local sign = get_u8(buf) == 1 and -1 or 1
local days = get_u4(buf) * sign
local H = get_u8(buf)
local M = get_u8(buf)
local S = get_u8(buf)
local ms = len == 8 and 0 or get_u32(buf)
return time_format == '*t'
and {days = days, hour = H, min = M, sec = S + ms / 10^6}
or time_format == '*s' and days * 24 * 3600 + H * 3600 + M * 60 + S + ms / 10^6
or format(time_format or (len == 8
and '%dd %02d:%02d:%02d'
or '%dd %02d:%02d:%02d.%06d'), days, H, M, S, ms)
end
local function set_datetime(buf, t)
local y, m, d, H, M, S
if isstr(t) then
y, m, d, t = t:match'^(%d+)-(%d+)-(%d+)(.*)'
H, M, S = t:match' (%d+):(%d+):([%d.]+)'
y = tonumber(y)
m = tonumber(m)
d = tonumber(d)
H = tonumber(H) or 0
M = tonumber(M) or 0
S = tonumber(S) or 0
else
y = t.year
m = t.month
d = t.day
H = t.hour
M = t.min
S = t.sec
end
local ms = (S - floor(S)) * 10^6
set_u8 (buf, 11)
set_u16(buf, y)
set_u8 (buf, m)
set_u8 (buf, d)
set_u8 (buf, H)
set_u8 (buf, M)
set_u8 (buf, S)
set_u32(buf, ms)
end
local function set_time(buf, t)
local days, H, M, S
if isstr(t) then
local d, rest = t:match'^([+%-%d]+)d (.*)'
days = d and tonumber(d) or 0
t = d and rest or t
H, M, S = t:match'^(%d+):(%d+):([%d.]+)$'
H = tonumber(H)
M = tonumber(M)
S = tonumber(S)
else
days = (t.days or 0) + floor(t.hour / 24)
H = t.hour % 24
M = t.min
S = t.sec
end
local ms = (S - floor(S)) * 10^6
set_u8 (buf, 12)
set_u8 (buf, days < 0 and 1 or 0)
set_u32(buf, math.abs(days))
set_u8 (buf, H)
set_u8 (buf, M)
set_u8 (buf, S)
set_u32(buf, ms)
end
local function set_u8(buf, x)
local p, i = buf(1)
assert(x >= 0 and x < 2^8)
p[i] = x
end
local function set_i8(buf, x)
local p, i = buf(1)
assert(x >= -127 and x <= 128)
cast(i8p, p+i)[0] = x
end
local function set_u24(buf, x)
local p, i = buf(3)
assert(x >= 0 and x < 2^24)
p[i+0] = band( x , 0xff)
p[i+1] = band(shr(x, 8), 0xff)
p[i+2] = band(shr(x, 16), 0xff)
end
local function set_u32(buf, x)
local p, i = buf(4)
assert(x >= 0 and x < 2^32)
cast(u32p, p+i)[0] = x
end
local function set_i32(buf, x)
local p, i = buf(4)
assert(x >= -(2^31-1) and x <= 2^31)
cast(i32p, p+i)[0] = x
end
local function set_u64(buf, x)
local p, i = buf(8)
assert(x >= 0 and x <= 2^52)
cast(u64p, p+i)[0] = x
end
local function set_i64(buf, x)
local p, i = buf(8)
assert(x >= -(2^51-1) and x <= 2^51)
cast(i64p, p+i)[0] = x
end
local function set_f64(buf, x)
local p, i = buf(8)
cast(f64p, p+i)[0] = x
end
local function set_f32(buf, x)
local p, i = buf(4)
cast(f32p, p+i)[0] = x
end
local function set_uint(buf, x) --length-encoded int
assert(x >= 0)
if x < 0xfb then
set_u8(buf, x)
elseif x < 2^16 then
set_u8(buf, 0xfc)
set_u16(buf, x)
elseif x < 2^24 then
set_u8(buf, 0xfd)
set_u24(buf, x)
else
set_u8(buf, 0xfe)
set_u64(buf, x)
end
end
local function set_cstring(buf, s)
local p, i = buf(#s+1)
copy(p+i, s)
end
local function set_bytes(buf, s, len)
len = len or #s
local p, i = buf(len)
copy(p+i, s, len)
end
local function set_str(buf, s)
set_uint(#s)
set_bytes(buf, s)
end
local function set_token(buf, password, scramble)
local stage1 = sha1(password)
local stage2 = sha1(stage1)
local stage3 = sha1(scramble .. stage2)
local n = #stage1
set_u8(buf, n)
local p, pi = buf(n)
for i = 1, n do
p[pi+i-1] = xor(stage3:byte(i), stage1:byte(i))
end
end
local function send_buffer(min_capacity)
local arr = dynarray(u8a, min_capacity)
local i = 0
return function(n)
local p = arr(i+n)
i = i + n
return p, i-n
end
end
local function send_packet(self, send_buf)
local send_buf, send_len = send_buf(0)
self.packet_no = self.packet_no + 1
local buf = send_buffer(4)
set_u24(buf, send_len)
set_u8(buf, band(self.packet_no, 0xff))
self.f:send(buf(0))
self.f:send(send_buf, send_len)
end
local function recv(self, sz)
local buf = self.buf(sz)
local f, checkp = self.f, self.f.checkp
f:recvn(buf, sz)
local i = 0
return function(n, err)
n = n or sz-i
checkp(f, i + n <= sz, err or 'short read')
i = i + n
return buf, i-n, n
end
end
local function recv_packet(self)
local buf = recv(self, 4) --packet header
local len = get_u24(buf)
self.f:checkp(len > 0, 'empty packet')
self.f:checkp(len <= self.max_packet_size, 'packet too big')
self.packet_no = get_u8(buf)
local buf = recv(self, len)
local field_count = get_u8(buf)
buf(-1) --peek
if field_count == 0x00 then typ = 'OK'
elseif field_count == 0xff then typ = 'ERR'
elseif field_count == 0xfe then typ = 'EOF'
else typ = 'DATA'
end
return typ, buf
end
local function get_name(buf)
local s = get_str(buf)
return s ~= '' and s:lower() or nil
end
local function get_eof_packet(buf)
buf(1) --status: EOF
local warning_count = get_u16(buf)
local status_flags = get_u16(buf)
return warning_count, status_flags
end
local UNSIGNED_FLAG = 32
function mysql_int_range(type, unsigned) --min, max, size
local range = int_ranges[type]
if range then
if unsigned then
return range[4], range[5], range[1]
else
return range[2], range[3], range[1]
end
end
end
function mysql_dec_range(digits, decimals, unsigned) --min, max, digits
local max = 10^(digits - decimals) - 10^-decimals
local min = unsigned and 0 or -max --unsigned decimals is deprecated!
return min, max, digits
end
--This is dumb: there's no such thing as "char length" on a variable-width
--MBCS but that's how you have to declare a varchar these days.
function mysql_char_size(byte_size, collation)
charset = collation:match'^[^_]+'
local mcw = max_char_widths[charset]
return mcw and floor(byte_size / mcw + .5) or byte_size
end
--NOTE: MySQL doesn't give enough metadata to generate a form in a UI,
--you'll have to query `information_schema` to get the rest like enum values
--and defaults. So we gather only what we need for display and for encoding
--params and decoding values in binary form, but not for editing.
local function get_field_packet(buf)
local col = {}
local _ = get_name(buf) --always "def"
col.db = 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) --connection's collation, not field's.
local display_size = get_u32(buf) --in bytes, not in characters.
local buf_type_code = get_u8(buf)
local flags = get_u16(buf)
local decimals = get_u8(buf)
local buf_type = buffer_type_names[buf_type_code]
local mysql_type
if collation == 63 then --binary
mysql_type = bin_types[buf_type] or buf_type
local unsigned = band(flags, UNSIGNED_FLAG) ~= 0 or nil --for val decoding
if mysql_type == 'tinyint' or mysql_type == 'smallint'
or mysql_type == 'mediumint' or mysql_type == 'int'
or mysql_type == 'bigint'
then
col.type = 'number'
col.decimals = 0
col.unsigned = unsigned
elseif mysql_type == 'decimal' then
local digits = display_size - (unsigned and 1 or 2)
col.type = digits > 15 and 'decimal' or 'number'
col.decimals = decimals
col.unsigned = unsigned