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I see extra bytes in what mysql client sends to server when load data local infile .. is called. The extra bytes appears to be an additional packet which I don't recognize to any known packet. It consists of 4 bytes and includes 0x0 0x0 0x0 0x3 .
ngrep dump caught by exexcuting :
sudo ngrep -x -q -d lo '' > outfile.out
dump:
interface: lo (127.0.0.0/255.0.0.0) T 127.0.0.1:58151 -> 127.0.0.1:3000 [AP] 38 00 00 00 03 6c 6f 61 64 20 64 61 74 61 20 6c 8....load data l 6f 63 61 6c 20 69 6e 66 69 6c 65 20 27 2e 2f 6c ocal infile './l 6f 61 64 33 2e 74 78 74 27 20 69 6e 74 6f 20 74 oad3.txt' into t 61 62 6c 65 20 74 65 73 74 2e 74 31 able test.t1 T 127.0.0.1:3000 -> 127.0.0.1:58151 [AP] 0c 00 00 01 fb 2e 2f 6c 6f 61 64 33 2e 74 78 74 ....../load3.txt T 127.0.0.1:58151 -> 127.0.0.1:3000 [AP] 14 00 00 02 31 20 20 20 20 20 20 32 20 0a 31 20 ....1 2 .1 20 20 20 20 20 39 31 0a 00 00 00 03 91..... ............. The packet above should contain 4 (header) + 20 bytes but it has 28 bytes. T 127.0.0.1:3000 -> 127.0.0.1:58151 [AP] 19 00 00 04 ff ff ff 01 02 02 00 00 00 0f 45 6e ..............En 64 20 62 75 6c 6b 20 69 6e 73 65 72 74 d bulk insert
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Vilho Raatikka That's an empty packet which client sends after it has sent the INFILE contents.
An empty packet only has header and no payload,
[00 00 00 03] - length = 0; packet sequence number = 3.
http://dev.mysql.com/doc/internals/en/com-query-response.html#packet-Protocol::LOCAL_INFILE_Request
Is the LOAD INFILE protocol and the empty packet documented somewhere?
Yes, check the link in my previous comment.
MySQL client : mysql Ver 15.1 Distrib 5.5.37-MariaDB, for Linux (x86_64) using readline 5.1
Reproduce by executing this in bash shell : mysql --local-infile -h 127.0.0.1 -P 3306 -u user -ppwd -c --disable-reconnect (not sure if last arguments are really needed for this case)
and in mysql-client prompt : load data local infile './load3.txt' into table test.t1;
Content of load3.txt :
1 2
1 91