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Merge work:/my/mysql-4.0 into hundin.mysql.fi:/my/mysql-4.0

parents 05136a90 60feecf4
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Docs/internals.texi
View file @ 8a9d2d95
\input texinfo @c -*-texinfo-*- \input texinfo @c -*-texinfo-*-
@c Copyright 2002 MySQL AB, TcX AB, Detron HB and Monty Program KB @c Copyright 2002 MySQL AB
@c @c
@c %**start of header @c %**start of header
@setfilename internals.info @setfilename internals.info
...@@ -545,6 +545,8 @@ Print query. ...@@ -545,6 +545,8 @@ Print query.
* basic packets:: * basic packets::
* communication:: * communication::
* fieldtype codes:: * fieldtype codes::
* protocol functions::
* protocol version 2::
@end menu @end menu
@node raw packet without compression, raw packet with compression, protocol, protocol @node raw packet without compression, raw packet with compression, protocol, protocol
...@@ -755,7 +757,7 @@ For details, see @file{sql/net_pkg.cc::send_ok()}. ...@@ -755,7 +757,7 @@ For details, see @file{sql/net_pkg.cc::send_ok()}.
n data n data
@node fieldtype codes, , communication, protocol @node fieldtype codes, protocol functions, communication, protocol
@section Fieldtype Codes @section Fieldtype Codes
@example @example
...@@ -779,6 +781,797 @@ Time 03 08 00 00 |01 0B |03 00 00 00 ...@@ -779,6 +781,797 @@ Time 03 08 00 00 |01 0B |03 00 00 00
Date 03 0A 00 00 |01 0A |03 00 00 00 Date 03 0A 00 00 |01 0A |03 00 00 00
@end example @end example
@node protocol functions, protocol version 2, fieldtype codes, protocol
@section Functions used to implement the protocol
This should be merged with the above one and changed to texi format
Raw packets
-----------
- The my_net_xxxx() functions handles the packaging of a stream of data
into a raw packet that contains a packet number, length and data.
- This is implemented for the server in sql/net_serv.cc.
The client file, libmysql/net.c, is symlinked to this file
The important functions are:
my_net_write() Store a packet (= # number of bytes) to be sent
net_flush() Send the packets stored in the buffer
net_write_command() Send a command (1 byte) + packet to the server.
my_net_read() Read a packet
Include files
-------------
- include/mysql.h is included by all MySQL clients. It includes the
MYSQL and MYSQL_RES structures.
- include/mysql_com.h is include by mysql.h and mysql_priv.h (the
server) and includes a lot of common functions and structures to
handle the client/server protocol.
Packets from server to client:
-----------------------------
sql/net_pkg.cc:
- Sending of error packets
- Sending of OK packets (= end of data)
- Storing of values in a packet
sql/sql_base.cc:
- Function send_fields() sends the field description to the client.
sql/sql_show.cc:
- Sends results for a lot of SHOW commands, including:
SHOW DATABASES [like 'wildcard']
SHOW TABLES [like 'wildcard']
Packets from client to server:
------------------------------
This is done in libmysql/libmysql.c
The important ones are:
- mysql_real_connect() Connects to a mysqld server
- mysql_real_query() Sends a query to the server and
reads the ok packet or columns header.
- mysql_store_result() Read a result set from the server to memory
- mysql_use_result() Read a result set row by row from the server.
- net_safe_read() Read a packet from the server with
error handling.
- net_field_length() Reads the length of a packet string.
- simple_command() Sends a command/query to the server.
Connecting to mysqld (the MySQL server)
---------------------------------------
- On the client side: libmysql/libmysql.c::mysql_real_connect().
- On the server side: sql/sql_parse.cc::check_connections()
The packets sent during a connection are as follows
Server: Send greeting package (includes server capabilites, server
version and a random string of bytes to be used to scramble
the password.
Client: Sends package with client capabilites, user name, scrambled
password, database name
Server: Sends ok package or error package.
Client: If init command specified, send it t the server and read
ok/error package.
Password functions
------------------
The passwords are scrambled to a random number and are stored in hex
format on the server.
The password handling is done in sql/password.c. The important
function is 'scramble()', which takes the a password in clear text
and uses this to 'encrypt' the random string sent by the server
to a new message.
The encrypted message is sent to the server which uses the stored
random number password to encrypt the random string sent to the
client. If this is equal to the new message the client sends to the
server then the password is accepted.
@node protocol version 2, , protocol functions, protocol
@section Another description of the protocol
This should be merged with the above one and changed to texi format.
*****************************
*
* PROTOCOL OVERVIEW
*
*****************************
The MySQL protocol is relatively simple, and is designed for high performance
through minimisation of overhead, and extensibility through versioning and
options flags. It is a request-response protocol, and does not allow
multitasking or multiplexing over a single connection. There are two packet
formats, 'raw' and 'compressed' (which is used when both client and
server support zlib compression, and the client requests that data be
compressed):
* RAW PACKET, shorter than 16 M *
+-----------------------------------------------+
| Packet Length | Packet no | Data |
| 3 Bytes | 1 Byte | n Bytes |
+-----------------------------------------------+
^ ^
| 'HEADER' |
+-------------------------------+
* Packet Length: Calculated with int3store. See include/global.h for
details. The basic computation is length = byte1 +
(256 * byte2) + (256 * 256 * byte3). The max packetsize
can be 16 MB.
* Packet no: The packet number is incremented for each sent packet.
The first packet for each query from the client
starts with 0.
* Data: Specific to the operation being performed. Most often
used to send string data, such as a SQL query.
* COMPRESSED PACKET *
+---------------------------------------------------+-----------------+
| Packet Length | Packet no | Uncomp. Packet Length | Compressed Data |
| 3 Bytes | 1 Byte | 3 Bytes | n bytes |
+---------------------------------------------------+-----------------+
^ ^
| 'HEADER' |
+---------------------------------------------------+
* Packet Length: Calculated with int3store. See include/my_global.h for
details. The basic computation is length = byte1 +
(256 * byte2) + (256 * 256 * byte3). The max packetsize
can be 16 MB.
* Packet no: The packet number is incremented for each sent packet.
The first packet starts with 0.
* Uncomp. Packet Length: The length of the original, uncompressed packet
If this is zero then the data is not compressed.
* Compressed Data: The original packet, compressed with zlib compression
When using the compressed protocol, the client/server will only compress
send packets where the new packet is smaller than the not compressed one.
In other words, some packets may be compressed while others will not.
The 'compressed data' is one or more packets in *RAW PACKET* format.
*****************************
*
* FLOW OF EVENTS
*
*****************************
To understand how a client communicates with a MySQL server, it is easiest
to start with a high-level flow of events. Each event section will then be
followed by details of the exact contents of each type of packet involved
in the event flow.
* *
* CONNECTION ESTABLISHMENT *
* *
Clients connect to the server via a TCP/IP socket (port 3306 by default), a
Unix Domain Socket, or named pipes (on Windows). Once connected, the
following connection establishment sequence is followed:
+--------+ +--------+
| Client | | Server |
+--------+ +--------+
| |
| Handshake initialisation, including MySQL server version, |
| protocol version and options supported, as well as the seed |
| for the password hash |
| |
| <-------------------------------------------------------------- |
| |
| Client options supported, max packet size for client |
| username, password crypted with seed from server, database |
| name. |
| |
| --------------------------------------------------------------> |
| |
| 'OK' packet if authentication succeeds, 'ERROR' packet if |
| authentication fails. |
| |
| <-------------------------------------------------------------- |
| |
* HANDSHAKE INITIALISATION PACKET *
+--------------------------------------------------------------------+
| Header | Prot. Version | Server Version String | 0x00 |
| | 1 Byte | n bytes | 1 byte |
|--------------------------------------------------------------------|
| Thread Number | Crypt Seed | 0x00 | CLIENT_xxx options |
| | | | supported by server |
| 4 Bytes | 8 Bytes | 1 Byte | 2 Bytes |
|--------------------------------------------------------------------|
| Server charset no. | Server status variables | 0x00 padding |
| 1 Byte | 2 Bytes | 13 bytes |
+--------------------------------------------------------------------+
* Protocol version (currently '10')
* Server Version String (e.g. '4.0.5-beta-log'). Can be any length as
it's followed by a 0 byte.
* Thread Number - ID of server thread handling this connection
* Crypt seed - seed used to crypt password in auth packet from client
* CLIENT_xxx options - see include/mysql_com.h
* Server charset no. - Index of charset in use by server
* Server status variables - see include/mysql_com.h
* The padding bytes are reserverd for future extensions to the protocol
* CLIENT AUTH PACKET *
+--------------------------------------------------------------------+
| Header | CLIENT_xxx options supported | max_allowed_packet |
| | by client | for client |
| | 2 Bytes | 3 bytes |
|--------------------------------------------------------------------|
| User Name | 0x00 | Crypted Password | 0x00 | Database Name |
| n Bytes | 1 Byte | 8 Bytes | 1 Byte | n Bytes |
|--------------------------------------------------------------------|
| 0x00 |
| 1 Byte |
+--------------------------------------------------------------------+
* CLIENT_xxx options that this client supports:
#define CLIENT_LONG_PASSWORD 1 /* new more secure passwords */
#define CLIENT_FOUND_ROWS 2 /* Found instead of affected rows */
#define CLIENT_LONG_FLAG 4 /* Get all column flags */
#define CLIENT_CONNECT_WITH_DB 8 /* One can specify db on connect */
#define CLIENT_NO_SCHEMA 16 /* Don't allow database.table.column */
#define CLIENT_COMPRESS 32 /* Can use compression protocol */
#define CLIENT_ODBC 64 /* Odbc client */
#define CLIENT_LOCAL_FILES 128 /* Can use LOAD DATA LOCAL */
#define CLIENT_IGNORE_SPACE 256 /* Ignore spaces before '(' */
#define CLIENT_INTERACTIVE 1024 /* This is an interactive client */
#define CLIENT_SSL 2048 /* Switch to SSL after handshake */
#define CLIENT_IGNORE_SIGPIPE 4096 /* IGNORE sigpipes */
#define CLIENT_TRANSACTIONS 8192 /* Client knows about transactions */
* max_allowed_packet for the client (in 'int3store' form)
* User Name - user to authenticate as. Is followed by a null byte.
* Crypted Password - password crypted with seed given in packet from
server, see scramble() in sql/password.c
* Database name (optional) - initial database to use once connected
Is followed by a null byte
At the end of every client/server exchange there is either an 'OK' packet
or an 'ERROR' packet sent from the server. To determine whether a packet is
an 'OK' packet, or an 'ERROR' packet, check if the first byte (after the
header) is 0xFF. If it has the value of 0xFF, the packet is an 'ERROR'
packet.
* OK PACKET *
For details, see sql/net_pkg.cc::send_ok()
+-----------------------------------------------+
| Header | No of Rows | Affected Rows |
| | 1 Byte | 1-9 Byte |
|-----------------------------------------------|
| ID (last_insert_id) | Status | Length |
| 1-9 Byte | 2 Byte | 1-9 Byte |
|-----------------------------------------------|
| Messagetext |
| n Byte |
+-----------------------------------------------+
* Number of rows, always 0
* Affected rows
* ID (last_insert_id) - value for auto_increment column (if any)
* Status (usually 0)
In general, in the MySQL protocol, fields in a packet that that
represent numeric data, such as lengths, that are labeled as '1-9'
bytes can be decoded by the following logic:
If the first byte is '251', the
corresponding column value is NULL (only appropriate in
'ROW DATA' packets).
If the first byte is '252', the value stored can be read
from the following 2 bytes as a 16-bit integer.
If the first byte is '253' the value stored can be read
from the following 4 bytes as a 32-bit long integer
If the first byte is '254', the value stored can be read
from the following 8 bytes as a 64-byte long
Otherwise (values 0-250), the value stored is the value of the
first byte itself.
If the OK-packet includes a message:
* Length of message
* Message Text
* ERROR PACKET *
+-----------------------------------------------+
| Header | Status code | Error no |
| | 1 Byte | 2 Byte |
|-----------------------------------------------|
| Messagetext | |
| n Byte | |
+-----------------------------------------------+
* Status code (0xFF = ERROR)
* Error number (is only sent to 3.23 and newer clients)
* Error message text (ends at end of packet)
Note that the error message is not null terminated.
The client code can however assume that the packet ends with a null
as my_net_read() will always add an end-null to all read packets to
make things easier for the client.
Example:
Packet dump of client connecting to server:
+------------------------- Protocol Version (10)
|
| +---------------------- Server Version String (0x00 terminated)
| |
| |
0a 34 2e 30 2e 35 2d 62 . 4 . 0 . 5 - b
65 74 61 2d 6c 6f 67 00 e t a - l o g .
15 00 00 00 2b 5a 65 6c . . . . + Z e l
| |
| +------------ First 4 bytes of crypt seed
|
+------------------------ Thread Number
+------------------------- Last 4 bytes of crypt seed
|
| +-------- CLIENT_XXX Options supported by server
| |
| +-+--+ +--- Server charset index
| | | |
6f 69 41 46 00 2c 28 08 o i A F . , ( .
02 00 00 00 00 00 00 00 . . . . . . . .
| |
| +---------------------- 0x00 padding begins
|
+------------------------- Server status (0x02 =
SERVER_STATUS_AUTOCOMMIT)
00 00 00 00 00 00 00 00 . . . . . . . .
* Client Authentication Response (Username 'test', no database
selected) *
+--------------------- Packet Length (0x13 = 19 bytes)
|
| +--------------- Packet Sequence #
| |
| | +----------- CLIENT_XXX Options supported by client
| |
+---+---+ | +-+-+
| | | | |
13 00 00 01 03 00 1e 00 . . . . . . . .
00 74 65 73 74 00 48 5e . t e s t . H ^
| | |
+----+-----+ +------- Scrambled password, 0x00 terminated
|
+----------------- Username, 0x00 terminated
57 4a 4e 41 4a 4e 00 00 W J N A J N . .
00 .
>From this point on, the server waits for 'commands' from the client
which include queries, database shutdown, quit, change user, etc (see
the COM_xxxx values in include/mysql_com.h for the latest
command codes).
* *
* COMMAND PROCESSING *
* *
+--------+ +--------+
| Client | | Server |
+--------+ +--------+
| |
| A command packet, with a command code, and string data |
| when appropriate (e.g. a query), (see the COM_xxxx values |
| in include/mysql_com.h for the command codes) |
| |
| --------------------------------------------------------------> |
| |
| A 'RESULT' packet if the command completed successfully, |
| an 'ERROR' packet if the command failed. 'RESULT' packets |
| take different forms (see the details following this chart) |
| depending on whether or not the command returns rows. |
| |
| <-------------------------------------------------------------- |
| |
| n 'FIELD PACKET's (if rows are returned) |
| |
| <-------------------------------------------------------------- |
| |
| 'LAST DATA' packet |
| |
| <-------------------------------------------------------------- |
| |
| n 'ROW PACKET's (if rows are returned) |
| |
| <-------------------------------------------------------------- |
| |
| 'LAST DATA' packet |
| |
| <-------------------------------------------------------------- |
| |
* Command Packet *
+------------------------------------------------------+
| Header | Command type | Query (if applicable) |
| | 1 Byte | n Bytes |
+------------------------------------------------------+
* Command type: (e.g.0x03 = query, see the COM_xxxx values in
include/mysql_com.h)
* Query (if applicable)
Note that my_net_read() null-terminates all packets on the
receiving side of the channel to make it easier for the code
examining the packets.
The current command codes are:
0x00 COM_SLEEP
0x01 COM_QUIT
0x02 COM_INIT_DB
0x03 COM_QUERY
0x04 COM_FIELD_LIST
0x05 COM_CREATE_DB
0x06 COM_DROP_DB
0x07 COM_REFRESH
0x08 COM_SHUTDOWN
0x09 COM_STATISTICS
0x0a COM_PROCESS_INFO
0x0b COM_CONNECT
0x0c COM_PROCESS_KILL
0x0d COM_DEBUG
0x0e COM_PING
0x0f COM_TIME
0x10 COM_DELAYED_INSERT
0x11 COM_CHANGE_USER
0x12 COM_BINLOG_DUMP
0x13 COM_TABLE_DUMP
0x14 COM_CONNECT_OUT
0x15 COM_REGISTER_SLAVE
* Result Packet *
Result packet for a command returning _no_ rows:
+-----------------------------------------------+
| Header | Field Count | Affected Rows |
| | 1-9 Bytes | 1-9 Bytes |
|-----------------------------------------------|
| ID (last_insert_id) | Server Status |
| 1-9 Bytes | 2 Bytes |
+-----------------------------------------------+
* Field Count: Has value of '0' for commands returning _no_ rows
* Affected rows: Count of rows affected by INSERT/UPDATE/DELETE, etc.
* ID: value of auto_increment column in row (if any). 0 if
* Server Status: Usually 0
Result packet for a command returning rows:
+-------------------------------+
| Header | Field Count |
| | 1-9 Bytes |
+-------------------------------+
* Field Count: number of columns/fields in result set,
(packed with net_store_length() in sql/net_pkg.cc)
This is followed by as many packets as the number of fields ('Field Count')
that contain the metadata for each column/field (see unpack_fields() in
libmysql/libmysql.c):
* FIELD PACKET *
+-----------------------------------------------+
| Header | Table Name |
| | length-coded-string |
|-----------------------------------------------|
| Field Name |
| length-code-string |
|-----------------------------------------------|
| Display length of field
| length-coded-binary (4 bytes) |
|-----------------------------------------------|
| Field Type (enum_field_types in mysql_com.h) |
| length-coded-binary (2 bytes) |
|-----------------------------------------------|
| Field Flags | Decimal Places|
| length-coded-binary (3 bytes) | 1 Byte |
+--------------+-------------+------------------+
* A length coded string is a string where we first have a packet
length (1-9 bytes, packed_with net_store_length()) followed
by a string.
* A length coded binary is a length (1 byte) followed by an integer
value in low-byte-first order. For the moment this type is always
fixed length in this packet.
* Table Name - the name of the table the column comes from
* Field Name - the name of the column/field
* Display length of field - length of field
* Field Type - Type of field, see enum_field_types in
include/mysql_com.h
Current field types are:
0x00 FIELD_TYPE_DECIMAL
0x01 FIELD_TYPE_TINY
0x02 FIELD_TYPE_SHORT
0x03 FIELD_TYPE_LONG
0x04 FIELD_TYPE_FLOAT
0x05 FIELD_TYPE_DOUBLE
0x06 FIELD_TYPE_NULL
0x07 FIELD_TYPE_TIMESTAMP
0x08 FIELD_TYPE_LONGLONG
0x09 FIELD_TYPE_INT24
0x0a FIELD_TYPE_DATE
0x0b FIELD_TYPE_TIME
0x0c FIELD_TYPE_DATETIME
0x0d FIELD_TYPE_YEAR
0x0e FIELD_TYPE_NEWDATE
0xf7 FIELD_TYPE_ENUM
0xf8 FIELD_TYPE_SET
0xf9 FIELD_TYPE_TINY_BLOB
0xfa FIELD_TYPE_MEDIUM_BLOB
0xfb FIELD_TYPE_LONG_BLOB
0xfc FIELD_TYPE_BLOB
0xfd FIELD_TYPE_VAR_STRING
0xfe FIELD_TYPE_STRING
0xff FIELD_TYPE_GEOMETRY
* Field Flags - NOT_NULL_FLAG, PRI_KEY_FLAG, xxx_FLAG in
include/mysql_com.h
Note that the packet format in 4.1 has slightly changed to allow more values.
* ROW PACKET *
+-----------------------------------------------+
| Header | Data Length | Column Data | ....for each column
| | 1-9 Bytes | n Bytes |
+-----------------------------------------------+
* Data Length: (packed with net_store_length() in sql/net_pkg.cc)
If 'Data Length' == 0, this is an 'ERROR PACKET'.
* Column Data: String representation of data. MySQL always sends result set
data as strings.
* LAST DATA PACKET *
Packet length is < 9 bytes, and first byte is 0xFE
+--------+
| 0xFE |
| 1 Byte |
+--------+
Examples:
***********
*
* INITDB Command
*
***********
A client issuing an 'INITDB' (select the database to use) command,
followed by an 'OK' packet with no rows and no affected rows from
the server:
* INITDB (select database to use) 'COMMAND' Packet *
+--------------------- Packet Length (5 bytes)
|
| +--------------- Packet Sequence #
| |
| | +------------ Command # (INITDB = 0x02)
| |
+---+---+ | | +---------- Beginning of query data
| | | | |
05 00 00 00 02 74 65 73 . . . . . t e s
74 t
* 'OK' Packet with no rows, and no rows affected *
+--------------------- Packet Length (3 bytes)
|
| +--------------- Packet Sequence #
| |
+---+---+ |
| | |
03 00 00 01 00 00 00 . . . . . . .
***********
*
* SELECT query example
*
***********
Client issuing a 'SELECT *' query on the following table:
CREATE TABLE number_test (minBigInt bigint,
maxBigInt bigint,
testBigInt bigint)
* 'COMMAND' Packet with QUERY (select ...) *
+--------------------- Packet Length (26)
|
| +--------------- Packet Sequence #
| |
| | +------------ Command # (QUERY = 0x03)
| |
+---+---+ | | +---------- Beginning of query data
| | | | |
1a 00 00 00 03 53 45 4c . . . . . S E L
45 43 54 20 2a 20 66 72 E C T . * . f r
6f 6d 20 6e 75 6d 62 65 o m . n u m b e
72 5f 74 65 73 74 r _ t e s t
and receiving an 'OK' packet with a 'FIELD COUNT' of 3
* 'OK' Packet with 3 fields *
+--------------------- Packet Length (3 bytes)
|
| +--------------- Packet Sequence #
| |
+---+---+ |
| | |
01 00 00 01 03 . . . . .
Followed immediately by 3 'FIELD' Packets. Note, the individual packets
are delimitted by =======, so that all fields can be annotated in the first
'FIELD' packet example:
=============================================================
+--------------------- Packet Length (0x1f = 31 bytes)
|
| +--------------- Packet Sequence #
| |
| | +------------ Block Length (0x0b = 11 bytes)
| | |
+---+---+ | | +--------- Table Name (11 bytes long)
| | | | |
1f 00 00 02 0b 6e 75 6d . . . . . n u m
62 65 72 5f 74 65 73 74 b e r _ t e s t
+------------------------ Block Length (9 bytes)
|
| +--------------------- Column Name (9 bytes long)
| |
09 6d 69 6e 42 69 67 49 . m i n B i g I
6e 74 03 14 00 00 01 08 n t . . . . . .
| | | | |
| +---+---+ | +--- Field Type (0x08 = FIELD_TYPE_LONGLONG)
| | |
| | +------ Block Length (1)
| |
| +--------------- Display Length (0x14 = 20 chars)
|
+------------------ Block Length (3)
+------------------------ Block Length (2)
|
| +-------------------- Field Flags (0 - no flags set)
| |
| +---+ +--------------- Decimal Places (0)
| | | |
02 00 00 00 . . . .
=============================================================
'FIELD' packet for the 'number_Test.maxBigInt' column
1f 00 00 03 0b 6e 75 6d . . . . . n u m
62 65 72 5f 74 65 73 74 b e r _ t e s t
09 6d 61 78 42 69 67 49 . m a x B i g I
6e 74 03 14 00 00 01 08 n t . . . . . .
02 00 00 00 . . . .
=============================================================
'FIELD' packet for the 'number_test.testBigInt' column
20 00 00 04 0b 6e 75 6d . . . . . n u m
62 65 72 5f 74 65 73 74 b e r _ t e s t
0a 74 65 73 74 42 69 67 . t e st B i g
49 6e 74 03 14 00 00 01 I n t . . . . .
08 02 00 00 00 . . . . .
=============================================================
Followed immediately by one 'LAST DATA' packet:
fe 00 . .
Followed immediately by 'n' row packets (in this case, only
one packet is sent from the server, for simplicity's sake):
+--------------------- Packet Length (0x52 = 82 bytes)
|
| +--------------- Packet Sequence #
| |
| | +------------ Data Length (0x14 = 20 bytes)
| | |
+---+---+ | | +--------- String Data '-9223372036854775808'
| | | | | (repeat Data Length/Data sequence)
52 00 00 06 14 2d 39 32 . . . . . - 9 2
32 33 33 37 32 30 33 36 2 3 3 7 2 0 3 6
38 35 34 37 37 35 38 30 8 5 4 7 7 5 8 0
38 13 39 32 32 33 33 37 8 . 9 2 2 3 3 7
32 30 33 36 38 35 34 37 2 0 3 6 8 5 4 7
37 35 38 30 37 0a 36 31 7 5 8 0 7 . 6 1
34 37 34 38 33 36 34 37 4 7 4 8 3 6 4 7
Followed immediately by one 'LAST DATA' packet:
fe 00 . .
@c The Index was empty, and ugly, so I removed it. (jcole, Sep 7, 2000) @c The Index was empty, and ugly, so I removed it. (jcole, Sep 7, 2000)
@c @node Index @c @node Index
...@@ -794,10 +1587,10 @@ fulltext search algorithms. ...@@ -794,10 +1587,10 @@ fulltext search algorithms.
Now it's just unsorted notes. Now it's just unsorted notes.
@menu @menu
* Weighting in boolean mode:: * Weighting in boolean mode::
@end menu @end menu
@node Weighting in boolean mode, , , Fulltext Search @node Weighting in boolean mode, , Fulltext Search, Fulltext Search
@section Weighting in boolean mode @section Weighting in boolean mode
The basic idea is as follows: in expression The basic idea is as follows: in expression
......
configure.in
View file @ 8a9d2d95
...@@ -934,6 +934,12 @@ case $SYSTEM_TYPE in ...@@ -934,6 +934,12 @@ case $SYSTEM_TYPE in
echo "Using --with-named-thread=-lpthread" echo "Using --with-named-thread=-lpthread"
with_named_thread="-lpthread" with_named_thread="-lpthread"
fi fi
# Fixes for HPUX 11.0 compiler
if test "$ac_cv_prog_gcc" = "no"
then
CFLAGS="$CFLAGS +DD64 -DHAVE_BROKEN_INLINE"
CXXFLAGS="$CXXFLAGS +DD64 +O2"
fi
;; ;;
*rhapsody*) *rhapsody*)
if test "$ac_cv_prog_gcc" = "yes" if test "$ac_cv_prog_gcc" = "yes"
......
include/my_global.h
View file @ 8a9d2d95
...@@ -141,6 +141,10 @@ C_MODE_END ...@@ -141,6 +141,10 @@ C_MODE_END
#undef HAVE_PREAD #undef HAVE_PREAD
#undef HAVE_PWRITE #undef HAVE_PWRITE
#endif #endif
#if defined(HAVE_BROKEN_INLINE) && !defined(__cplusplus)
#undef inline
#define inline
#endif
#ifdef UNDEF_HAVE_GETHOSTBYNAME_R /* For OSF4.x */ #ifdef UNDEF_HAVE_GETHOSTBYNAME_R /* For OSF4.x */
#undef HAVE_GETHOSTBYNAME_R #undef HAVE_GETHOSTBYNAME_R
......
libmysql/password.c
View file @ 8a9d2d95
...@@ -91,7 +91,7 @@ void make_scrambled_password(char *to,const char *password) ...@@ -91,7 +91,7 @@ void make_scrambled_password(char *to,const char *password)
sprintf(to,"%08lx%08lx",hash_res[0],hash_res[1]); sprintf(to,"%08lx%08lx",hash_res[0],hash_res[1]);
} }
static inline uint char_val(char X) static inline unsigned int char_val(char X)
{ {
return (uint) (X >= '0' && X <= '9' ? X-'0' : return (uint) (X >= '0' && X <= '9' ? X-'0' :
X >= 'A' && X <= 'Z' ? X-'A'+10 : X >= 'A' && X <= 'Z' ? X-'A'+10 :
......
mysql-test/r/group_by.result
View file @ 8a9d2d95
drop table if exists t1,t2; drop table if exists t1,t2,t3;
CREATE TABLE t1 ( CREATE TABLE t1 (
spID int(10) unsigned, spID int(10) unsigned,
userID int(10) unsigned, userID int(10) unsigned,
...@@ -417,3 +417,38 @@ xID xID1 Level ...@@ -417,3 +417,38 @@ xID xID1 Level
3 134 *** 3 134 ***
4 185 **** 4 185 ****
drop table t1; drop table t1;
CREATE TABLE t1 (
pid int(11) unsigned NOT NULL default '0',
c1id int(11) unsigned default NULL,
c2id int(11) unsigned default NULL,
value int(11) unsigned NOT NULL default '0',
UNIQUE KEY pid2 (pid,c1id,c2id),
UNIQUE KEY pid (pid,value)
) TYPE=MyISAM;
INSERT INTO t1 VALUES (1, 1, NULL, 1),(1, 2, NULL, 2),(1, NULL, 3, 3),(1, 4, NULL, 4),(1, 5, NULL, 5);
CREATE TABLE t2 (
id int(11) unsigned NOT NULL default '0',
active enum('Yes','No') NOT NULL default 'Yes',
PRIMARY KEY (id)
) TYPE=MyISAM;
INSERT INTO t2 VALUES (1, 'Yes'),(2, 'No'),(4, 'Yes'),(5, 'No');
CREATE TABLE t3 (
id int(11) unsigned NOT NULL default '0',
active enum('Yes','No') NOT NULL default 'Yes',
PRIMARY KEY (id)
);
INSERT INTO t3 VALUES (3, 'Yes');
select * from t1 AS m LEFT JOIN t2 AS c1 ON m.c1id =
c1.id AND c1.active = 'Yes' LEFT JOIN t3 AS c2 ON m.c2id = c2.id AND
c2.active = 'Yes' WHERE m.pid=1 AND (c1.id IS NOT NULL OR c2.id IS NOT NULL);
pid c1id c2id value id active id active
1 1 NULL 1 1 Yes NULL NULL
1 NULL 3 3 NULL NULL 3 Yes
1 4 NULL 4 4 Yes NULL NULL
select max(value) from t1 AS m LEFT JOIN t2 AS c1 ON
m.c1id = c1.id AND c1.active = 'Yes' LEFT JOIN t3 AS c2 ON m.c2id =
c2.id AND c2.active = 'Yes' WHERE m.pid=1 AND (c1.id IS NOT NULL OR c2.id IS
NOT NULL);
max(value)
4
drop table t1,t2,t3;
mysql-test/t/group_by.test
View file @ 8a9d2d95
...@@ -2,7 +2,7 @@ ...@@ -2,7 +2,7 @@
# Test of group (Failed for Lars Hoss <lh@pbm.de>) # Test of group (Failed for Lars Hoss <lh@pbm.de>)
# #
drop table if exists t1,t2; drop table if exists t1,t2,t3;
CREATE TABLE t1 ( CREATE TABLE t1 (
spID int(10) unsigned, spID int(10) unsigned,
userID int(10) unsigned, userID int(10) unsigned,
...@@ -312,3 +312,42 @@ insert into t1 values (1,244,NULL),(2,243,NULL),(134,223,NULL),(185,186,NULL); ...@@ -312,3 +312,42 @@ insert into t1 values (1,244,NULL),(2,243,NULL),(134,223,NULL),(185,186,NULL);
select S.ID as xID, S.ID1 as xID1 from t1 as S left join t1 as yS on S.ID1 between yS.ID1 and yS.ID2; select S.ID as xID, S.ID1 as xID1 from t1 as S left join t1 as yS on S.ID1 between yS.ID1 and yS.ID2;
select S.ID as xID, S.ID1 as xID1, repeat('*',count(distinct yS.ID)) as Level from t1 as S left join t1 as yS on S.ID1 between yS.ID1 and yS.ID2 group by xID order by xID1; select S.ID as xID, S.ID1 as xID1, repeat('*',count(distinct yS.ID)) as Level from t1 as S left join t1 as yS on S.ID1 between yS.ID1 and yS.ID2 group by xID order by xID1;
drop table t1; drop table t1;
#
# Problem with MAX and LEFT JOIN
#
CREATE TABLE t1 (
pid int(11) unsigned NOT NULL default '0',
c1id int(11) unsigned default NULL,
c2id int(11) unsigned default NULL,
value int(11) unsigned NOT NULL default '0',
UNIQUE KEY pid2 (pid,c1id,c2id),
UNIQUE KEY pid (pid,value)
) TYPE=MyISAM;
INSERT INTO t1 VALUES (1, 1, NULL, 1),(1, 2, NULL, 2),(1, NULL, 3, 3),(1, 4, NULL, 4),(1, 5, NULL, 5);
CREATE TABLE t2 (
id int(11) unsigned NOT NULL default '0',
active enum('Yes','No') NOT NULL default 'Yes',
PRIMARY KEY (id)
) TYPE=MyISAM;
INSERT INTO t2 VALUES (1, 'Yes'),(2, 'No'),(4, 'Yes'),(5, 'No');
CREATE TABLE t3 (
id int(11) unsigned NOT NULL default '0',
active enum('Yes','No') NOT NULL default 'Yes',
PRIMARY KEY (id)
);
INSERT INTO t3 VALUES (3, 'Yes');
select * from t1 AS m LEFT JOIN t2 AS c1 ON m.c1id =
c1.id AND c1.active = 'Yes' LEFT JOIN t3 AS c2 ON m.c2id = c2.id AND
c2.active = 'Yes' WHERE m.pid=1 AND (c1.id IS NOT NULL OR c2.id IS NOT NULL);
select max(value) from t1 AS m LEFT JOIN t2 AS c1 ON
m.c1id = c1.id AND c1.active = 'Yes' LEFT JOIN t3 AS c2 ON m.c2id =
c2.id AND c2.active = 'Yes' WHERE m.pid=1 AND (c1.id IS NOT NULL OR c2.id IS
NOT NULL);
drop table t1,t2,t3;
mysys/hash.c
View file @ 8a9d2d95
...@@ -82,7 +82,12 @@ void hash_free(HASH *hash) ...@@ -82,7 +82,12 @@ void hash_free(HASH *hash)
/* some helper functions */ /* some helper functions */
inline byte* /*
This function is char* instead of byte* as HPUX11 compiler can't
handle inline functions that are not defined as native types
*/
inline char*
hash_key(HASH *hash,const byte *record,uint *length,my_bool first) hash_key(HASH *hash,const byte *record,uint *length,my_bool first)
{ {
if (hash->get_key) if (hash->get_key)
...@@ -103,7 +108,7 @@ static uint hash_rec_mask(HASH *hash,HASH_LINK *pos,uint buffmax, ...@@ -103,7 +108,7 @@ static uint hash_rec_mask(HASH *hash,HASH_LINK *pos,uint buffmax,
uint maxlength) uint maxlength)
{ {
uint length; uint length;
byte *key=hash_key(hash,pos->data,&length,0); byte *key= (byte*) hash_key(hash,pos->data,&length,0);
return hash_mask((*hash->calc_hashnr)(key,length),buffmax,maxlength); return hash_mask((*hash->calc_hashnr)(key,length),buffmax,maxlength);
} }
...@@ -180,10 +185,10 @@ uint calc_hashnr_caseup(const byte *key, uint len) ...@@ -180,10 +185,10 @@ uint calc_hashnr_caseup(const byte *key, uint len)
#ifndef __SUNPRO_C /* SUNPRO can't handle this */ #ifndef __SUNPRO_C /* SUNPRO can't handle this */
inline inline
#endif #endif
uint rec_hashnr(HASH *hash,const byte *record) unsigned int rec_hashnr(HASH *hash,const byte *record)
{ {
uint length; uint length;
byte *key=hash_key(hash,record,&length,0); byte *key= (byte*) hash_key(hash,record,&length,0);
return (*hash->calc_hashnr)(key,length); return (*hash->calc_hashnr)(key,length);
} }
...@@ -270,7 +275,7 @@ static void movelink(HASH_LINK *array,uint find,uint next_link,uint newlink) ...@@ -270,7 +275,7 @@ static void movelink(HASH_LINK *array,uint find,uint next_link,uint newlink)
static int hashcmp(HASH *hash,HASH_LINK *pos,const byte *key,uint length) static int hashcmp(HASH *hash,HASH_LINK *pos,const byte *key,uint length)
{ {
uint rec_keylength; uint rec_keylength;
byte *rec_key=hash_key(hash,pos->data,&rec_keylength,1); byte *rec_key= (byte*) hash_key(hash,pos->data,&rec_keylength,1);
return (length && length != rec_keylength) || return (length && length != rec_keylength) ||
(hash->flags & HASH_CASE_INSENSITIVE ? (hash->flags & HASH_CASE_INSENSITIVE ?
my_casecmp(rec_key,key,rec_keylength) : my_casecmp(rec_key,key,rec_keylength) :
......
mysys/my_static.c
View file @ 8a9d2d95
...@@ -60,7 +60,7 @@ USED_MEM* my_once_root_block=0; /* pointer to first block */ ...@@ -60,7 +60,7 @@ USED_MEM* my_once_root_block=0; /* pointer to first block */
uint my_once_extra=ONCE_ALLOC_INIT; /* Memory to alloc / block */ uint my_once_extra=ONCE_ALLOC_INIT; /* Memory to alloc / block */
/* from my_tempnam */ /* from my_tempnam */
#ifndef HAVE_TEMPNAM #if !defined(HAVE_TEMPNAM) || defined(HPUX11)
int _my_tempnam_used=0; int _my_tempnam_used=0;
#endif #endif
......
mysys/my_static.h
View file @ 8a9d2d95
...@@ -65,7 +65,7 @@ extern const char *soundex_map; ...@@ -65,7 +65,7 @@ extern const char *soundex_map;
extern USED_MEM* my_once_root_block; extern USED_MEM* my_once_root_block;
extern uint my_once_extra; extern uint my_once_extra;
#ifndef HAVE_TEMPNAM #if !defined(HAVE_TEMPNAM) || defined(HPUX11)
extern int _my_tempnam_used; extern int _my_tempnam_used;
#endif #endif
......
mysys/my_tempnam.c
View file @ 8a9d2d95
...@@ -23,6 +23,12 @@ ...@@ -23,6 +23,12 @@
#include "mysys_priv.h" #include "mysys_priv.h"
#include <m_string.h> #include <m_string.h>
/* HPUX 11.0 doesn't allow us to change the environ pointer */
#ifdef HPUX11
#undef HAVE_TEMPNAM
#endif
#include "my_static.h" #include "my_static.h"
#include "mysys_err.h" #include "mysys_err.h"
......
sql/item_cmpfunc.cc
View file @ 8a9d2d95
...@@ -1236,6 +1236,45 @@ longlong Item_cond_or::val_int() ...@@ -1236,6 +1236,45 @@ longlong Item_cond_or::val_int()
return 0; return 0;
} }
/*
Create an AND expression from two expressions
SYNOPSIS
and_expressions()
a expression or NULL
b expression.
org_item Don't modify a if a == *org_item
If a == NULL, org_item is set to point at b,
to ensure that future calls will not modify b.
NOTES
This will not modify item pointed to by org_item or b
The idea is that one can call this in a loop and create and
'and' over all items without modifying any of the original items.
RETURN
NULL Error
Item
*/
Item *and_expressions(Item *a, Item *b, Item **org_item)
{
if (!a)
return (*org_item= (Item*) b);
if (a == *org_item)
{
Item_cond *res;
if ((res= new Item_cond_and(a, (Item*) b)))
res->used_tables_cache= a->used_tables() | b->used_tables();
return res;
}
if (((Item_cond_and*) a)->add((Item*) b))
return 0;
((Item_cond_and*) a)->used_tables_cache|= b->used_tables();
return a;
}
longlong Item_func_isnull::val_int() longlong Item_func_isnull::val_int()
{ {
/* /*
......
sql/item_cmpfunc.h
View file @ 8a9d2d95
...@@ -621,3 +621,6 @@ class Item_cond_xor :public Item_cond ...@@ -621,3 +621,6 @@ class Item_cond_xor :public Item_cond
longlong val_int(); longlong val_int();
const char *func_name() const { return "xor"; } const char *func_name() const { return "xor"; }
}; };
Item *and_expressions(Item *a, Item *b, Item **org_item);
sql/opt_sum.cc
View file @ 8a9d2d95
...@@ -37,6 +37,19 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds) ...@@ -37,6 +37,19 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
bool recalc_const_item=0; bool recalc_const_item=0;
table_map removed_tables=0; table_map removed_tables=0;
Item *item; Item *item;
COND *org_conds= conds;
/* Add all ON conditions to WHERE condition */
for (TABLE_LIST *tl=tables; tl ; tl= tl->next)
{
if (tl->on_expr)
conds= and_expressions(conds, tl->on_expr, &org_conds);
}
/*
Iterate through item is select part and replace COUNT(), MIN() and MAX()
with constants (if possible)
*/
while ((item= it++)) while ((item= it++))
{ {
......
sql/sql_analyse.cc
View file @ 8a9d2d95
...@@ -677,7 +677,7 @@ bool analyse::end_of_records() ...@@ -677,7 +677,7 @@ bool analyse::end_of_records()
case FIELD_TYPE_DECIMAL: case FIELD_TYPE_DECIMAL:
ans.append("DECIMAL", 7); ans.append("DECIMAL", 7);
// if item is FIELD_ITEM, it _must_be_ Field_num in this case // if item is FIELD_ITEM, it _must_be_ Field_num in this case
if (((Field_num*) (*f)->item)->zerofill) if (((Field_num*) ((Item_field*) (*f)->item)->field)->zerofill)
ans.append(" ZEROFILL"); ans.append(" ZEROFILL");
break; break;
default: default:
......
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