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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: Implements MapServer joins.
* Author: Steve Lime and the MapServer team.
*
******************************************************************************
* Copyright (c) 1996-2005 Regents of the University of Minnesota.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of this Software or works derived from this Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include
"mapserver.h"
#define
ROW_ALLOCATION_SIZE
10
/* DBF/XBase function prototypes */
int
msDBFJoinConnect
(
layerObj
*
layer
,
joinObj
*
join
);
int
msDBFJoinPrepare
(
joinObj
*
join
,
shapeObj
*
shape
);
int
msDBFJoinNext
(
joinObj
*
join
);
int
msDBFJoinClose
(
joinObj
*
join
);
int
msDBFJoinTable
(
layerObj
*
layer
,
joinObj
*
join
,
shapeObj
*
shape
);
/* CSV (comma delimited text file) function prototypes */
int
msCSVJoinConnect
(
layerObj
*
layer
,
joinObj
*
join
);
int
msCSVJoinPrepare
(
joinObj
*
join
,
shapeObj
*
shape
);
int
msCSVJoinNext
(
joinObj
*
join
);
int
msCSVJoinClose
(
joinObj
*
join
);
int
msCSVJoinTable
(
layerObj
*
layer
,
joinObj
*
join
,
shapeObj
*
shape
);
/* MySQL function prototypes */
int
msMySQLJoinConnect
(
layerObj
*
layer
,
joinObj
*
join
);
int
msMySQLJoinPrepare
(
joinObj
*
join
,
shapeObj
*
shape
);
int
msMySQLJoinNext
(
joinObj
*
join
);
int
msMySQLJoinClose
(
joinObj
*
join
);
int
msMySQLJoinTable
(
layerObj
*
layer
,
joinObj
*
join
,
shapeObj
*
shape
);
/* PostgreSQL function prototypes */
int
msPOSTGRESQLJoinConnect
(
layerObj
*
layer
,
joinObj
*
join
);
int
msPOSTGRESQLJoinPrepare
(
joinObj
*
join
,
shapeObj
*
shape
);
int
msPOSTGRESQLJoinNext
(
joinObj
*
join
);
int
msPOSTGRESQLJoinClose
(
joinObj
*
join
);
/* wrapper function for DB specific join functions */
int
msJoinConnect
(
layerObj
*
layer
,
joinObj
*
join
)
{
switch
(
join
->
connectiontype
) {
case
(
MS_DB_XBASE
):
return
msDBFJoinConnect
(
layer
,
join
);
break
;
case
(
MS_DB_CSV
):
return
msCSVJoinConnect
(
layer
,
join
);
break
;
case
(
MS_DB_MYSQL
):
return
msMySQLJoinConnect
(
layer
,
join
);
break
;
case
(
MS_DB_POSTGRES
):
return
msPOSTGRESQLJoinConnect
(
layer
,
join
);
break
;
default
:
break
;
}
msSetError
(
MS_JOINERR
,
"Unsupported join connection type."
,
"msJoinConnect()"
);
return
MS_FAILURE
;
}
int
msJoinPrepare
(
joinObj
*
join
,
shapeObj
*
shape
)
{
switch
(
join
->
connectiontype
) {
case
(
MS_DB_XBASE
):
return
msDBFJoinPrepare
(
join
,
shape
);
break
;
case
(
MS_DB_CSV
):
return
msCSVJoinPrepare
(
join
,
shape
);
break
;
case
(
MS_DB_MYSQL
):
return
msMySQLJoinPrepare
(
join
,
shape
);
break
;
case
(
MS_DB_POSTGRES
):
return
msPOSTGRESQLJoinPrepare
(
join
,
shape
);
break
;
default
:
break
;
}
msSetError
(
MS_JOINERR
,
"Unsupported join connection type."
,
"msJoinPrepare()"
);
return
MS_FAILURE
;
}
int
msJoinNext
(
joinObj
*
join
)
{
switch
(
join
->
connectiontype
) {
case
(
MS_DB_XBASE
):
return
msDBFJoinNext
(
join
);
break
;
case
(
MS_DB_CSV
):
return
msCSVJoinNext
(
join
);
break
;
case
(
MS_DB_MYSQL
):
return
msMySQLJoinNext
(
join
);
break
;
case
(
MS_DB_POSTGRES
):
return
msPOSTGRESQLJoinNext
(
join
);
break
;
default
:
break
;
}
msSetError
(
MS_JOINERR
,
"Unsupported join connection type."
,
"msJoinNext()"
);
return
MS_FAILURE
;
}
int
msJoinClose
(
joinObj
*
join
)
{
switch
(
join
->
connectiontype
) {
case
(
MS_DB_XBASE
):
return
msDBFJoinClose
(
join
);
break
;
case
(
MS_DB_CSV
):
return
msCSVJoinClose
(
join
);
break
;
case
(
MS_DB_MYSQL
):
return
msMySQLJoinClose
(
join
);
break
;
case
(
MS_DB_POSTGRES
):
return
msPOSTGRESQLJoinClose
(
join
);
break
;
default
:
break
;
}
msSetError
(
MS_JOINERR
,
"Unsupported join connection type."
,
"msJoinClose()"
);
return
MS_FAILURE
;
}
/* */
/* XBASE join functions */
/* */
typedef
struct
{
DBFHandle
hDBF
;
int
fromindex
,
toindex
;
char
*
target
;
int
nextrecord
;
}
msDBFJoinInfo
;
int
msDBFJoinConnect
(
layerObj
*
layer
,
joinObj
*
join
)
{
int
i
;
char
szPath
[
MS_MAXPATHLEN
];
msDBFJoinInfo
*
joininfo
;
if
(
join
->
joininfo
)
return
(
MS_SUCCESS
);
/* already open */
if
(
msCheckParentPointer
(
layer
->
map
,
"map"
)
==
MS_FAILURE
)
return
MS_FAILURE
;
/* allocate a msDBFJoinInfo struct */
joininfo
=
(
msDBFJoinInfo
*
)
malloc
(
sizeof
(
msDBFJoinInfo
));
if
(!
joininfo
) {
msSetError
(
MS_MEMERR
,
"Error allocating XBase table info structure."
,
"msDBFJoinConnect()"
);
return
(
MS_FAILURE
);
}
/* initialize any members that won't get set later on in this function */
joininfo
->
target
=
NULL
;
joininfo
->
nextrecord
=
0
;
join
->
joininfo
=
joininfo
;
/* open the XBase file */
if
((
joininfo
->
hDBF
=
msDBFOpen
(
msBuildPath3
(
szPath
,
layer
->
map
->
mappath
,
layer
->
map
->
shapepath
,
join
->
table
),
"rb"
))
==
NULL
) {
if
((
joininfo
->
hDBF
=
msDBFOpen
(
msBuildPath
(
szPath
,
layer
->
map
->
mappath
,
join
->
table
),
"rb"
))
==
NULL
) {
msSetError
(
MS_IOERR
,
"(%s)"
,
"msDBFJoinConnect()"
,
join
->
table
);
return
(
MS_FAILURE
);
}
}
/* get "to" item index */
if
((
joininfo
->
toindex
=
msDBFGetItemIndex
(
joininfo
->
hDBF
,
join
->
to
))
==
-1
) {
msSetError
(
MS_DBFERR
,
"Item %s not found in table %s."
,
"msDBFJoinConnect()"
,
join
->
to
,
join
->
table
);
return
(
MS_FAILURE
);
}
/* get "from" item index */
for
(
i
=
0
;
i
<
layer
->
numitems
;
i
++
) {
if
(
strcasecmp
(
layer
->
items
[
i
],
join
->
from
)
==
0
) {
/* found it */
joininfo
->
fromindex
=
i
;
break
;
}
}
if
(
i
==
layer
->
numitems
) {
msSetError
(
MS_JOINERR
,
"Item %s not found in layer %s."
,
"msDBFJoinConnect()"
,
join
->
from
,
layer
->
name
);
return
(
MS_FAILURE
);
}
/* finally store away the item names in the XBase table */
join
->
numitems
=
msDBFGetFieldCount
(
joininfo
->
hDBF
);
join
->
items
=
msDBFGetItems
(
joininfo
->
hDBF
);
if
(!
join
->
items
)
return
(
MS_FAILURE
);
return
(
MS_SUCCESS
);
}
int
msDBFJoinPrepare
(
joinObj
*
join
,
shapeObj
*
shape
)
{
msDBFJoinInfo
*
joininfo
=
join
->
joininfo
;
if
(!
joininfo
) {
msSetError
(
MS_JOINERR
,
"Join connection has not be created."
,
"msDBFJoinPrepare()"
);
return
(
MS_FAILURE
);
}
if
(!
shape
) {
msSetError
(
MS_JOINERR
,
"Shape to be joined is empty."
,
"msDBFJoinPrepare()"
);
return
(
MS_FAILURE
);
}
if
(!
shape
->
values
) {
msSetError
(
MS_JOINERR
,
"Shape to be joined has no attributes."
,
"msDBFJoinPrepare()"
);
return
(
MS_FAILURE
);
}
joininfo
->
nextrecord
=
0
;
/* starting with the first record */
if
(
joininfo
->
target
)
free
(
joininfo
->
target
);
/* clear last target */
joininfo
->
target
=
msStrdup
(
shape
->
values
[
joininfo
->
fromindex
]);
return
(
MS_SUCCESS
);
}
int
msDBFJoinNext
(
joinObj
*
join
)
{
int
i
,
n
;
msDBFJoinInfo
*
joininfo
=
join
->
joininfo
;
if
(!
joininfo
) {
msSetError
(
MS_JOINERR
,
"Join connection has not be created."
,
"msDBFJoinNext()"
);
return
(
MS_FAILURE
);
}
if
(!
joininfo
->
target
) {
msSetError
(
MS_JOINERR
,
"No target specified, run msDBFJoinPrepare() first."
,
"msDBFJoinNext()"
);
return
(
MS_FAILURE
);
}
/* clear any old data */
if
(
join
->
values
) {
msFreeCharArray
(
join
->
values
,
join
->
numitems
);
join
->
values
=
NULL
;
}
n
=
msDBFGetRecordCount
(
joininfo
->
hDBF
);
for
(
i
=
joininfo
->
nextrecord
;
i
<
n
;
i
++
) {
/* find a match */
if
(
strcmp
(
joininfo
->
target
,
msDBFReadStringAttribute
(
joininfo
->
hDBF
,
i
,
joininfo
->
toindex
))
==
0
)
break
;
}
if
(
i
==
n
) {
/* unable to do the join */
if
((
join
->
values
=
(
char
*
*
)
malloc
(
sizeof
(
char
*
)
*
join
->
numitems
))
==
NULL
) {
msSetError
(
MS_MEMERR
,
NULL
,
"msDBFJoinNext()"
);
return
(
MS_FAILURE
);
}
for
(
i
=
0
;
i
<
join
->
numitems
;
i
++
)
join
->
values
[
i
]
=
msStrdup
(
"\0"
);
/* intialize to zero length strings */
joininfo
->
nextrecord
=
n
;
return
(
MS_DONE
);
}
if
((
join
->
values
=
msDBFGetValues
(
joininfo
->
hDBF
,
i
))
==
NULL
)
return
(
MS_FAILURE
);
joininfo
->
nextrecord
=
i
+
1
;
/* so we know where to start looking next time through */
return
(
MS_SUCCESS
);
}
int
msDBFJoinClose
(
joinObj
*
join
)
{
msDBFJoinInfo
*
joininfo
=
join
->
joininfo
;
if
(!
joininfo
)
return
(
MS_SUCCESS
);
/* already closed */
if
(
joininfo
->
hDBF
)
msDBFClose
(
joininfo
->
hDBF
);
if
(
joininfo
->
target
)
free
(
joininfo
->
target
);
free
(
joininfo
);
joininfo
=
NULL
;
return
(
MS_SUCCESS
);
}
/* */
/* CSV (comma separated value) join functions */
/* */
typedef
struct
{
int
fromindex
,
toindex
;
char
*
target
;
char
*
*
*
rows
;
int
numrows
;
int
nextrow
;
}
msCSVJoinInfo
;
int
msCSVJoinConnect
(
layerObj
*
layer
,
joinObj
*
join
)
{
int
i
;
FILE
*
stream
;
char
szPath
[
MS_MAXPATHLEN
];
msCSVJoinInfo
*
joininfo
;
char
buffer
[
MS_BUFFER_LENGTH
];
if
(
join
->
joininfo
)
return
(
MS_SUCCESS
);
/* already open */
if
(
msCheckParentPointer
(
layer
->
map
,
"map"
)
==
MS_FAILURE
)
return
MS_FAILURE
;
/* allocate a msCSVJoinInfo struct */
if
((
joininfo
=
(
msCSVJoinInfo
*
)
malloc
(
sizeof
(
msCSVJoinInfo
)))
==
NULL
) {
msSetError
(
MS_MEMERR
,
"Error allocating CSV table info structure."
,
"msCSVJoinConnect()"
);
return
(
MS_FAILURE
);
}
/* initialize any members that won't get set later on in this function */
joininfo
->
target
=
NULL
;
joininfo
->
nextrow
=
0
;
join
->
joininfo
=
joininfo
;
/* open the CSV file */
if
((
stream
=
fopen
(
msBuildPath3
(
szPath
,
layer
->
map
->
mappath
,
layer
->
map
->
shapepath
,
join
->
table
),
"r"
))
==
NULL
) {
if
((
stream
=
fopen
(
msBuildPath
(
szPath
,
layer
->
map
->
mappath
,
join
->
table
),
"r"
))
==
NULL
) {
msSetError
(
MS_IOERR
,
"(%s)"
,
"msCSVJoinConnect()"
,
join
->
table
);
return
(
MS_FAILURE
);
}
}
/* once through to get the number of rows */
joininfo
->
numrows
=
0
;
while
(
fgets
(
buffer
,
MS_BUFFER_LENGTH
,
stream
)
!=
NULL
)
joininfo
->
numrows
++
;
rewind
(
stream
);
if
((
joininfo
->
rows
=
(
char
*
*
*
)
malloc
(
joininfo
->
numrows
*
sizeof
(
char
*
*
)))
==
NULL
) {
fclose
(
stream
);
msSetError
(
MS_MEMERR
,
"Error allocating rows."
,
"msCSVJoinConnect()"
);
return
(
MS_FAILURE
);
}
/* load the rows */
i
=
0
;
while
(
fgets
(
buffer
,
MS_BUFFER_LENGTH
,
stream
)
!=
NULL
) {
msStringTrimEOL
(
buffer
);
joininfo
->
rows
[
i
]
=
msStringSplitComplex
(
buffer
,
","
,
&
(
join
->
numitems
),
MS_ALLOWEMPTYTOKENS
);
i
++
;
}
fclose
(
stream
);
/* get "from" item index */
for
(
i
=
0
;
i
<
layer
->
numitems
;
i
++
) {
if
(
strcasecmp
(
layer
->
items
[
i
],
join
->
from
)
==
0
) {
/* found it */
joininfo
->
fromindex
=
i
;
break
;
}
}
if
(
i
==
layer
->
numitems
) {
msSetError
(
MS_JOINERR
,
"Item %s not found in layer %s."
,
"msCSVJoinConnect()"
,
join
->
from
,
layer
->
name
);
return
(
MS_FAILURE
);
}
/* get "to" index (for now the user tells us which column, 1..n) */
joininfo
->
toindex
=
atoi
(
join
->
to
)
-
1
;
if
(
joininfo
->
toindex
<
0
||
joininfo
->
toindex
>
join
->
numitems
) {
msSetError
(
MS_JOINERR
,
"Invalid column index %s."
,
"msCSVJoinConnect()"
,
join
->
to
);
return
(
MS_FAILURE
);
}
/* store away the column names (1..n) */
if
((
join
->
items
=
(
char
*
*
)
malloc
(
sizeof
(
char
*
)
*
join
->
numitems
))
==
NULL
) {
msSetError
(
MS_MEMERR
,
"Error allocating space for join item names."
,
"msCSVJoinConnect()"
);
return
(
MS_FAILURE
);
}
for
(
i
=
0
;
i
<
join
->
numitems
;
i
++
) {
join
->
items
[
i
]
=
(
char
*
)
malloc
(
12
);
/* plenty of space */
sprintf
(
join
->
items
[
i
],
"%d"
,
i
+
1
);
}
return
(
MS_SUCCESS
);
}
int
msCSVJoinPrepare
(
joinObj
*
join
,
shapeObj
*
shape
)
{
msCSVJoinInfo
*
joininfo
=
join
->
joininfo
;
if
(!
joininfo
) {
msSetError
(
MS_JOINERR
,
"Join connection has not be created."
,
"msCSVJoinPrepare()"
);
return
(
MS_FAILURE
);
}
if
(!
shape
) {
msSetError
(
MS_JOINERR
,
"Shape to be joined is empty."
,
"msCSVJoinPrepare()"
);
return
(
MS_FAILURE
);
}
if
(!
shape
->
values
) {
msSetError
(
MS_JOINERR
,
"Shape to be joined has no attributes."
,
"msCSVJoinPrepare()"
);
return
(
MS_FAILURE
);
}
joininfo
->
nextrow
=
0
;
/* starting with the first record */
if
(
joininfo
->
target
)
free
(
joininfo
->
target
);
/* clear last target */
joininfo
->
target
=
msStrdup
(
shape
->
values
[
joininfo
->
fromindex
]);
return
(
MS_SUCCESS
);
}
int
msCSVJoinNext
(
joinObj
*
join
)
{
int
i
,
j
;
msCSVJoinInfo
*
joininfo
=
join
->
joininfo
;
if
(!
joininfo
) {
msSetError
(
MS_JOINERR
,
"Join connection has not be created."
,
"msCSVJoinNext()"
);
return
(
MS_FAILURE
);
}
/* clear any old data */
if
(
join
->
values
) {
msFreeCharArray
(
join
->
values
,
join
->
numitems
);
join
->
values
=
NULL
;
}
for
(
i
=
joininfo
->
nextrow
;
i
<
joininfo
->
numrows
;
i
++
) {
/* find a match */
if
(
strcmp
(
joininfo
->
target
,
joininfo
->
rows
[
i
][
joininfo
->
toindex
])
==
0
)
break
;
}
if
((
join
->
values
=
(
char
*
*
)
malloc
(
sizeof
(
char
*
)
*
join
->
numitems
))
==
NULL
) {
msSetError
(
MS_MEMERR
,
NULL
,
"msCSVJoinNext()"
);
return
(
MS_FAILURE
);
}
if
(
i
==
joininfo
->
numrows
) {
/* unable to do the join */
for
(
j
=
0
;
j
<
join
->
numitems
;
j
++
)
join
->
values
[
j
]
=
msStrdup
(
"\0"
);
/* intialize to zero length strings */
joininfo
->
nextrow
=
joininfo
->
numrows
;
return
(
MS_DONE
);
}
for
(
j
=
0
;
j
<
join
->
numitems
;
j
++
)
join
->
values
[
j
]
=
msStrdup
(
joininfo
->
rows
[
i
][
j
]);
joininfo
->
nextrow
=
i
+
1
;
/* so we know where to start looking next time through */
return
(
MS_SUCCESS
);
}
int
msCSVJoinClose
(
joinObj
*
join
)
{
int
i
;
msCSVJoinInfo
*
joininfo
=
join
->
joininfo
;
if
(!
joininfo
)
return
(
MS_SUCCESS
);
/* already closed */
for
(
i
=
0
;
i
<
joininfo
->
numrows
;
i
++
)
msFreeCharArray
(
joininfo
->
rows
[
i
],
join
->
numitems
);
free
(
joininfo
->
rows
);
if
(
joininfo
->
target
)
free
(
joininfo
->
target
);
free
(
joininfo
);
joininfo
=
NULL
;
return
(
MS_SUCCESS
);
}
#ifdef
USE_MYSQL
#ifndef
_mysql_h
#include
<mysql/mysql.h>
#endif
char
*
DB_HOST
=
NULL
;
char
*
DB_USER
=
NULL
;
char
*
DB_PASSWD
=
NULL
;
char
*
DB_DATABASE
=
NULL
;
char
*
delim
;
#define
MYDEBUG
if (0)
MYSQL_RES
*
msMySQLQuery
(
char
*
q
,
MYSQL
*
conn
)
{
MYSQL_RES
*
qresult
=
NULL
;
if
(
mysql_query
(
conn
,
q
)
<
0
) {
mysql_close
(
conn
);
msSetError
(
MS_QUERYERR
,
"Bad mysql query (%s)"
,
"msMySQLQuery()"
,
q
);
return
qresult
;
}
if
(!(
qresult
=
mysql_store_result
(
conn
))) {
mysql_close
(
conn
);
msSetError
(
MS_QUERYERR
,
"mysql query failed (%s)"
,
"msMySQLQuery()"
,
q
);
return
qresult
;
}
return
qresult
;
}
/* */
/* mysql join functions */
/* */
typedef
struct
{
MYSQL
mysql
,
*
conn
;
MYSQL_RES
*
qresult
;
MYSQL_ROW
row
;
int
rows
;
int
fromindex
;
char
*
tocolumn
;
char
*
target
;
int
nextrecord
;
}
msMySQLJoinInfo
;
#endif
int
msMySQLJoinConnect
(
layerObj
*
layer
,
joinObj
*
join
)
{
(
void
)
layer
;
(
void
)
join
;
#ifndef
USE_MYSQL
msSetError
(
MS_QUERYERR
,
"MySQL support not available (compile with --with-mysql)"
,
"msMySQLJoinConnect()"
);
return
(
MS_FAILURE
);
#else
int
i
;
char
qbuf
[
4000
];
char
*
conn_decrypted
;
msMySQLJoinInfo
*
joininfo
;
MYDEBUG
if
(
setvbuf
(
stdout
,
NULL
,
_IONBF
,
0
)) {
printf
(
"Whoops..."
);
};
if
(
join
->
joininfo
)
return
(
MS_SUCCESS
);
/* already open */
/* allocate a msMySQLJoinInfo struct */
joininfo
=
(
msMySQLJoinInfo
*
)
malloc
(
sizeof
(
msMySQLJoinInfo
));
if
(!
joininfo
) {
msSetError
(
MS_MEMERR
,
"Error allocating mysql table info structure."
,
"msMySQLJoinConnect()"
);
return
(
MS_FAILURE
);
}
/* initialize any members that won't get set later on in this function */
joininfo
->
qresult
=
NULL
;
joininfo
->
target
=
NULL
;
joininfo
->
nextrecord
=
0
;
join
->
joininfo
=
joininfo
;
/* open the mysql connection */
if
(
join
->
connection
==
NULL
) {
msSetError
(
MS_QUERYERR
,
"Error parsing MYSQL JOIN: nothing specified in CONNECTION statement."
,
"msMySQLJoinConnect()"
);
return
(
MS_FAILURE
);
}
conn_decrypted
=
msDecryptStringTokens
(
layer
->
map
,
join
->
connection
);
if
(
conn_decrypted
==
NULL
) {
msSetError
(
MS_QUERYERR
,
"Error parsing MYSQL JOIN: unable to decrypt CONNECTION statement."
,
"msMySQLJoinConnect()"
);
return
(
MS_FAILURE
);
}
delim
=
msStrdup
(
":"
);
DB_HOST
=
msStrdup
(
strtok
(
conn_decrypted
,
delim
));
DB_USER
=
msStrdup
(
strtok
(
NULL
,
delim
));
DB_PASSWD
=
msStrdup
(
strtok
(
NULL
,
delim
));
DB_DATABASE
=
msStrdup
(
strtok
(
NULL
,
delim
));
free
(
conn_decrypted
);
if
(
DB_HOST
==
NULL
||
DB_USER
==
NULL
||
DB_PASSWD
==
NULL
||
DB_DATABASE
==
NULL
) {
msSetError
(
MS_QUERYERR
,
"DB param error: at least one of HOST, USER, PASSWD or DATABASE is null!"
,
"msMySQLJoinConnect()"
);
return
MS_FAILURE
;
}
if
(
strcmp
(
DB_PASSWD
,
"none"
)
==
0
)
strcpy
(
DB_PASSWD
,
""
);
#if
MYSQL_VERSION_ID
>=
40000
mysql_init
(
&
(
joininfo
->
mysql
));
if
(!(
joininfo
->
conn
=
mysql_real_connect
(
&
(
joininfo
->
mysql
),
DB_HOST
,
DB_USER
,
DB_PASSWD
,
NULL
,
0
,
NULL
,
0
)))
#else
if
(!(
joininfo
->
conn
=
mysql_connect
(
&
(
joininfo
->
mysql
),
DB_HOST
,
DB_USER
,
DB_PASSWD
)))
#endif
{
char
tmp
[
4000
];
snprintf
(
tmp
,
sizeof
(
tmp
),
"Failed to connect to SQL server: Error: %s\nHost: %s\nUsername:%s\nPassword:%s\n"
,
mysql_error
(
joininfo
->
conn
),
DB_HOST
,
DB_USER
,
DB_PASSWD
);
msSetError
(
MS_QUERYERR
,
"%s"
,
"msMYSQLLayerOpen()"
,
tmp
);
free
(
joininfo
);
return
MS_FAILURE
;
}
MYDEBUG
printf
(
"msMYSQLLayerOpen2 called<br>\n"
);
if
(
mysql_select_db
(
joininfo
->
conn
,
DB_DATABASE
)
<
0
) {
mysql_close
(
joininfo
->
conn
);
}
MYDEBUG
printf
(
"msMYSQLLayerOpen3 called<br>\n"
);
if
(
joininfo
->
qresult
!=
NULL
) {
/* query leftover */
MYDEBUG
printf
(
"msMYSQLLayerOpen4 called<br>\n"
);
mysql_free_result
(
joininfo
->
qresult
);
}
MYDEBUG
printf
(
"msMYSQLLayerOpen5 called<br>\n"
);
snprintf
(
qbuf
,
sizeof
(
qbuf
),
"SELECT count(%s) FROM %s"
,
join
->
to
,
join
->
table
);
MYDEBUG
printf
(
"%s<br>\n"
,
qbuf
);
if
((
joininfo
->
qresult
=
msMySQLQuery
(
qbuf
,
joininfo
->
conn
))) {
/* There were some rows found, write 'em out for debug */
int
numrows
=
mysql_affected_rows
(
joininfo
->
conn
);
MYDEBUG
printf
(
"%d rows<br>\n"
,
numrows
);
for
(
i
=
0
;
i
<
numrows
;
i
++
) {
MYSQL_ROW
row
=
mysql_fetch_row
(
joininfo
->
qresult
);
MYDEBUG
printf
(
"(%s)<BR>\n"
,
row
[
0
]);
joininfo
->
rows
=
atoi
(
row
[
0
]);
}
}
else
{
msSetError
(
MS_DBFERR
,
"Item %s not found in table %s."
,
"msMySQLJoinConnect()"
,
join
->
to
,
join
->
table
);
return
(
MS_FAILURE
);
}
snprintf
(
qbuf
,
sizeof
(
qbuf
),
"EXPLAIN %s"
,
join
->
table
);
if
((
joininfo
->
qresult
=
msMySQLQuery
(
qbuf
,
joininfo
->
conn
))) {
/* There were some rows found, write 'em out for debug */
join
->
numitems
=
mysql_affected_rows
(
joininfo
->
conn
);
if
((
join
->
items
=
(
char
*
*
)
malloc
(
sizeof
(
char
*
)
*
join
->
numitems
))
==
NULL
) {
msSetError
(
MS_MEMERR
,
NULL
,
"msMySQLJoinConnect()"
);
return
(
MS_FAILURE
);
}
MYDEBUG
printf
(
"%d rows<br>\n"
,
join
->
numitems
);
for
(
i
=
0
;
i
<
join
->
numitems
;
i
++
) {
MYSQL_ROW
row
=
mysql_fetch_row
(
joininfo
->
qresult
);
MYDEBUG
printf
(
"(%s)<BR>\n"
,
row
[
0
]);
join
->
items
[
i
]
=
msStrdup
(
row
[
0
]);
}
}
else
{
msSetError
(
MS_DBFERR
,
"Item %s not found in table %s."
,
"msMySQLJoinConnect()"
,
join
->
to
,
join
->
table
);
return
(
MS_FAILURE
);
}
joininfo
->
tocolumn
=
msStrdup
(
join
->
to
);
/* get "from" item index */
for
(
i
=
0
;
i
<
layer
->
numitems
;
i
++
) {
if
(
strcasecmp
(
layer
->
items
[
i
],
join
->
from
)
==
0
) {
/* found it */
joininfo
->
fromindex
=
i
;
break
;
}
}
if
(
i
==
layer
->
numitems
) {
msSetError
(
MS_JOINERR
,
"Item %s not found in layer %s."
,
"msMySQLJoinConnect()"
,
join
->
from
,
layer
->
name
);
return
(
MS_FAILURE
);
}
/* finally store away the item names in the XBase table */
if
(!
join
->
items
)
return
(
MS_FAILURE
);
return
(
MS_SUCCESS
);
#endif
}
int
msMySQLJoinPrepare
(
joinObj
*
join
,
shapeObj
*
shape
)
{
(
void
)
join
;
(
void
)
shape
;
#ifndef
USE_MYSQL
msSetError
(
MS_QUERYERR
,
"MySQL support not available (compile with --with-mysql)"
,
"msMySQLJoinPrepare()"
);
return
(
MS_FAILURE
);
#else
msMySQLJoinInfo
*
joininfo
=
join
->
joininfo
;
if
(!
joininfo
) {
msSetError
(
MS_JOINERR
,
"Join connection has not be created."
,
"msMySQLJoinPrepare()"
);
return
(
MS_FAILURE
);
}
if
(!
shape
) {
msSetError
(
MS_JOINERR
,
"Shape to be joined is empty."
,
"msMySQLJoinPrepare()"
);
return
(
MS_FAILURE
);
}
if
(!
shape
->
values
) {
msSetError
(
MS_JOINERR
,
"Shape to be joined has no attributes."
,
"msMySQLJoinPrepare()"
);
return
(
MS_FAILURE
);
}
joininfo
->
nextrecord
=
0
;
/* starting with the first record */
if
(
joininfo
->
target
)
free
(
joininfo
->
target
);
/* clear last target */
joininfo
->
target
=
msStrdup
(
shape
->
values
[
joininfo
->
fromindex
]);
return
(
MS_SUCCESS
);
#endif
}
int
msMySQLJoinNext
(
joinObj
*
join
)
{
(
void
)
join
;
#ifndef
USE_MYSQL
msSetError
(
MS_QUERYERR
,
"MySQL support not available (compile with --with-mysql)"
,
"msMySQLJoinNext()"
);
return
(
MS_FAILURE
);
#else
int
i
;
char
qbuf
[
4000
];
msMySQLJoinInfo
*
joininfo
=
join
->
joininfo
;
if
(!
joininfo
) {
msSetError
(
MS_JOINERR
,
"Join connection has not be created."
,
"msMySQLJoinNext()"
);
return
(
MS_FAILURE
);
}
if
(!
joininfo
->
target
) {
msSetError
(
MS_JOINERR
,
"No target specified, run msMySQLJoinPrepare() first."
,
"msMySQLJoinNext()"
);
return
(
MS_FAILURE
);
}
/* clear any old data */
if
(
join
->
values
) {
msFreeCharArray
(
join
->
values
,
join
->
numitems
);
join
->
values
=
NULL
;
}
/* int n = joininfo->rows; */
/* for(i=joininfo->nextrecord; i<n; i++) { // find a match */
/* if(strcmp(joininfo->target, msMySQLReadStringAttribute(joininfo->conn, i, joininfo->toindex)) == 0) break; */
/* } */
snprintf
(
qbuf
,
sizeof
(
qbuf
),
"SELECT * FROM %s WHERE %s = %s"
,
join
->
table
,
joininfo
->
tocolumn
,
joininfo
->
target
);
MYDEBUG
printf
(
"%s<BR>\n"
,
qbuf
);
if
((
joininfo
->
qresult
=
msMySQLQuery
(
qbuf
,
joininfo
->
conn
))) {
/* There were some rows found, write 'em out for debug */
int
numrows
=
mysql_affected_rows
(
joininfo
->
conn
);
int
numfields
=
mysql_field_count
(
joininfo
->
conn
);
MYDEBUG
printf
(
"%d rows<br>\n"
,
numrows
);
if
(
numrows
>
0
) {
MYSQL_ROW
row
=
mysql_fetch_row
(
joininfo
->
qresult
);
for
(
i
=
0
;
i
<
numfields
;
i
++
) {
MYDEBUG
printf
(
"%s,"
,
row
[
i
]);
}
MYDEBUG
printf
(
"<BR>\n"
);
free
(
join
->
values
);
if
((
join
->
values
=
(
char
*
*
)
malloc
(
sizeof
(
char
*
)
*
join
->
numitems
))
==
NULL
) {
msSetError
(
MS_MEMERR
,
NULL
,
"msMySQLJoinNext()"
);
return
(
MS_FAILURE
);
}
for
(
i
=
0
;
i
<
join
->
numitems
;
i
++
) {
/* join->values[i] = msStrdup("\0"); */
/* intialize to zero length strings */
join
->
values
[
i
]
=
msStrdup
(
row
[
i
]);
/* intialize to zero length strings */
/* rows = atoi(row[0]); */
}
}
else
{
if
((
join
->
values
=
(
char
*
*
)
malloc
(
sizeof
(
char
*
)
*
join
->
numitems
))
==
NULL
) {
msSetError
(
MS_MEMERR
,
NULL
,
"msMySQLJoinNext()"
);
return
(
MS_FAILURE
);
}
for
(
i
=
0
;
i
<
join
->
numitems
;
i
++
)
join
->
values
[
i
]
=
msStrdup
(
"\0"
);
/* intialize to zero length strings */
return
(
MS_DONE
);
}
}
else
{
msSetError
(
MS_QUERYERR
,
"Query error (%s)"
,
"msMySQLJoinNext()"
,
qbuf
);
return
(
MS_FAILURE
);
}
#ifdef
__NOTDEF__
if
(
i
==
n
) {
/* unable to do the join */
if
((
join
->
values
=
(
char
*
*
)
malloc
(
sizeof
(
char
*
)
*
join
->
numitems
))
==
NULL
) {
msSetError
(
MS_MEMERR
,
NULL
,
"msMySQLJoinNext()"
);
return
(
MS_FAILURE
);
}
for
(
i
=
0
;
i
<
join
->
numitems
;
i
++
)
join
->
values
[
i
]
=
msStrdup
(
"\0"
);
/* intialize to zero length strings */
joininfo
->
nextrecord
=
n
;
return
(
MS_DONE
);
}
if
((
join
->
values
=
msMySQLGetValues
(
joininfo
->
conn
,
i
))
==
NULL
)
return
(
MS_FAILURE
);
joininfo
->
nextrecord
=
i
+
1
;
/* so we know where to start looking next time through */
#endif
/* __NOTDEF__ */
return
(
MS_SUCCESS
);
#endif
}
int
msMySQLJoinClose
(
joinObj
*
join
)
{
(
void
)
join
;
#ifndef
USE_MYSQL
msSetError
(
MS_QUERYERR
,
"MySQL support not available (compile with --with-mysql)"
,
"msMySQLJoinClose()"
);
return
(
MS_FAILURE
);
#else
msMySQLJoinInfo
*
joininfo
=
join
->
joininfo
;
if
(!
joininfo
)
return
(
MS_SUCCESS
);
/* already closed */
mysql_close
(
joininfo
->
conn
);
if
(
joininfo
->
target
)
free
(
joininfo
->
target
);
free
(
joininfo
);
joininfo
=
NULL
;
return
(
MS_SUCCESS
);
#endif
}
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