forked from MapServer/MapServer
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mapmssql2008.c
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mapmssql2008.c
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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: MS SQL 2008 (Katmai) Layer Connector
* Author: Richard Hillman - based on PostGIS and SpatialDB connectors
*
******************************************************************************
* Copyright (c) 2007 IS Consulting (www.mapdotnet.com)
*
* 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.
******************************************************************************
*
* Revision 1.0 2007/7/1
* Created.
*
*/
#define _CRT_SECURE_NO_WARNINGS 1
/* $Id$ */
#include <assert.h>
#include "mapserver.h"
#include "maptime.h"
#ifdef USE_MSSQL2008
#include <windows.h>
#include <sql.h>
#include <sqlext.h>
#include <sqltypes.h>
#include <string.h>
#include <ctype.h> /* tolower() */
/* Native geometry parser macros */
/* parser error codes */
#define NOERROR 0
#define NOT_ENOUGH_DATA 1
#define CORRUPT_DATA 2
#define UNSUPPORTED_GEOMETRY_TYPE 3
/* geometry format to transfer geometry column */
#define MSSQLGEOMETRY_NATIVE 0
#define MSSQLGEOMETRY_WKB 1
#define MSSQLGEOMETRY_WKT 2
/* geometry column types */
#define MSSQLCOLTYPE_GEOMETRY 0
#define MSSQLCOLTYPE_GEOGRAPHY 1
#define MSSQLCOLTYPE_BINARY 2
#define MSSQLCOLTYPE_TEXT 3
#define SP_NONE 0
#define SP_HASZVALUES 1
#define SP_HASMVALUES 2
#define SP_ISVALID 4
#define SP_ISSINGLEPOINT 8
#define SP_ISSINGLELINESEGMENT 0x10
#define SP_ISWHOLEGLOBE 0x20
#define ST_UNKNOWN 0
#define ST_POINT 1
#define ST_LINESTRING 2
#define ST_POLYGON 3
#define ST_MULTIPOINT 4
#define ST_MULTILINESTRING 5
#define ST_MULTIPOLYGON 6
#define ST_GEOMETRYCOLLECTION 7
#define ReadInt32(nPos) (*((unsigned int*)(gpi->pszData + (nPos))))
#define ReadByte(nPos) (gpi->pszData[nPos])
#define ReadDouble(nPos) (*((double*)(gpi->pszData + (nPos))))
#define ParentOffset(iShape) (ReadInt32(gpi->nShapePos + (iShape) * 9 ))
#define FigureOffset(iShape) (ReadInt32(gpi->nShapePos + (iShape) * 9 + 4))
#define ShapeType(iShape) (ReadByte(gpi->nShapePos + (iShape) * 9 + 8))
#define NextFigureOffset(iShape) (iShape + 1 < gpi->nNumShapes? FigureOffset((iShape) +1) : gpi->nNumFigures)
#define FigureAttribute(iFigure) (ReadByte(gpi->nFigurePos + (iFigure) * 5))
#define PointOffset(iFigure) (ReadInt32(gpi->nFigurePos + (iFigure) * 5 + 1))
#define NextPointOffset(iFigure) (iFigure + 1 < gpi->nNumFigures? PointOffset((iFigure) +1) : gpi->nNumPoints)
#define ReadX(iPoint) (ReadDouble(gpi->nPointPos + gpi->nPointSize * (iPoint)))
#define ReadY(iPoint) (ReadDouble(gpi->nPointPos + gpi->nPointSize * (iPoint) + 8))
#define ReadZ(iPoint) (ReadDouble(gpi->nPointPos + gpi->nPointSize * (iPoint) + 16))
#define ReadM(iPoint) (ReadDouble(gpi->nPointPos + gpi->nPointSize * (iPoint) + 24))
/* Native geometry parser struct */
typedef struct msGeometryParserInfo_t
{
unsigned char* pszData;
int nLen;
/* serialization propeties */
char chProps;
/* point array */
int nPointSize;
int nPointPos;
int nNumPoints;
/* figure array */
int nFigurePos;
int nNumFigures;
/* shape array */
int nShapePos;
int nNumShapes;
int nSRSId;
/* geometry or geography */
int nColType;
/* bounds */
double minx;
double miny;
double maxx;
double maxy;
} msGeometryParserInfo;
/* Structure for connection to an ODBC database (Microsoft preferred way to connect to SQL Server 2005 from c/c++) */
typedef struct msODBCconn_t
{
SQLHENV henv; /* ODBC HENV */
SQLHDBC hdbc; /* ODBC HDBC */
SQLHSTMT hstmt; /* ODBC HSTMNT */
char errorMessage[1024]; /* Last error message if any */
} msODBCconn;
typedef struct ms_MSSQL2008_layer_info_t
{
char *sql; /* sql query to send to DB */
long row_num; /* what row is the NEXT to be read (for random access) */
char *geom_column; /* name of the actual geometry column parsed from the LAYER's DATA field */
char *geom_column_type; /* the type of the geometry column */
char *geom_table; /* the table name or sub-select decalred in the LAYER's DATA field */
char *urid_name; /* name of user-specified unique identifier or OID */
char *user_srid; /* zero length = calculate, non-zero means using this value! */
char *index_name; /* hopefully this isn't necessary - but if the optimizer ain't cuttin' it... */
msODBCconn * conn; /* Connection to db */
msGeometryParserInfo gpi; /* struct for the geometry parser */
int geometry_format; /* Geometry format to be retrieved from the database */
} msMSSQL2008LayerInfo;
#define SQL_COLUMN_NAME_MAX_LENGTH 128
#define SQL_TABLE_NAME_MAX_LENGTH 128
#define DATA_ERROR_MESSAGE \
"%s" \
"Error with MSSQL2008 data variable. You specified '%s'.<br>\n" \
"Standard ways of specifiying are : <br>\n(1) 'geometry_column from geometry_table' <br>\n(2) 'geometry_column from (<sub query>) as foo using unique <column name> using SRID=<srid#>' <br><br>\n\n" \
"Make sure you utilize the 'using unique <column name>' and 'using with <index name>' clauses in.\n\n<br><br>" \
"For more help, please see http://www.mapdotnet.com \n\n<br><br>" \
"mapmssql2008.c - version of 2007/7/1.\n"
/* Native geometry parser code */
void ReadPoint(msGeometryParserInfo* gpi, pointObj* p, int iPoint, int iOrder)
{
if (gpi->nColType == MSSQLCOLTYPE_GEOGRAPHY)
{
p->x = ReadY(iPoint);
p->y = ReadX(iPoint);
}
else
{
p->x = ReadX(iPoint);
p->y = ReadY(iPoint);
}
/* calculate bounds */
if (iOrder == 0)
{
gpi->minx = gpi->maxx = p->x;
gpi->miny = gpi->maxy = p->y;
}
else
{
if (gpi->minx > p->x) gpi->minx = p->x;
else if (gpi->maxx < p->x) gpi->maxx = p->x;
if (gpi->miny > p->y) gpi->miny = p->y;
else if (gpi->maxy < p->y) gpi->maxy = p->y;
}
#ifdef USE_POINT_Z_M
if ( gpi->chProps & SP_HASZVALUES )
p->z = ReadZ(iPoint);
if ( gpi->chProps & SP_HASMVALUES )
p->z = ReadM(iPoint);
#endif
}
int ParseSqlGeometry(msMSSQL2008LayerInfo* layerinfo, shapeObj *shape)
{
msGeometryParserInfo* gpi = &layerinfo->gpi;
if (gpi->nLen < 10)
{
msDebug("ParseSqlGeometry NOT_ENOUGH_DATA\n");
return NOT_ENOUGH_DATA;
}
/* store the SRS id for further use */
gpi->nSRSId = ReadInt32(0);
if ( ReadByte(4) != 1 )
{
msDebug("ParseSqlGeometry CORRUPT_DATA\n");
return CORRUPT_DATA;
}
gpi->chProps = ReadByte(5);
if ( gpi->chProps & SP_HASMVALUES )
gpi->nPointSize = 32;
else if ( gpi->chProps & SP_HASZVALUES )
gpi->nPointSize = 24;
else
gpi->nPointSize = 16;
if ( gpi->chProps & SP_ISSINGLEPOINT )
{
// single point geometry
if (gpi->nLen < 6 + gpi->nPointSize)
{
msDebug("ParseSqlGeometry NOT_ENOUGH_DATA\n");
return NOT_ENOUGH_DATA;
}
shape->type = MS_SHAPE_POINT;
shape->line = (lineObj *) msSmallMalloc(sizeof(lineObj));
shape->numlines = 1;
shape->line[0].point = (pointObj *) msSmallMalloc(sizeof(pointObj));
shape->line[0].numpoints = 1;
gpi->nPointPos = 6;
ReadPoint(gpi, &shape->line[0].point[0], 0, 0);
}
else if ( gpi->chProps & SP_ISSINGLELINESEGMENT )
{
// single line segment with 2 points
if (gpi->nLen < 6 + 2 * gpi->nPointSize)
{
msDebug("ParseSqlGeometry NOT_ENOUGH_DATA\n");
return NOT_ENOUGH_DATA;
}
shape->type = MS_SHAPE_LINE;
shape->line = (lineObj *) msSmallMalloc(sizeof(lineObj));
shape->numlines = 1;
shape->line[0].point = (pointObj *) msSmallMalloc(sizeof(pointObj) * 2);
shape->line[0].numpoints = 2;
gpi->nPointPos = 6;
ReadPoint(gpi, &shape->line[0].point[0], 0, 0);
ReadPoint(gpi, &shape->line[0].point[1], 1, 1);
}
else
{
int iShape, iFigure;
// complex geometries
gpi->nNumPoints = ReadInt32(6);
if ( gpi->nNumPoints <= 0 )
{
return NOERROR;
}
// position of the point array
gpi->nPointPos = 10;
// position of the figures
gpi->nFigurePos = gpi->nPointPos + gpi->nPointSize * gpi->nNumPoints + 4;
if (gpi->nLen < gpi->nFigurePos)
{
msDebug("ParseSqlGeometry NOT_ENOUGH_DATA\n");
return NOT_ENOUGH_DATA;
}
gpi->nNumFigures = ReadInt32(gpi->nFigurePos - 4);
if ( gpi->nNumFigures <= 0 )
{
return NOERROR;
}
// position of the shapes
gpi->nShapePos = gpi->nFigurePos + 5 * gpi->nNumFigures + 4;
if (gpi->nLen < gpi->nShapePos)
{
msDebug("ParseSqlGeometry NOT_ENOUGH_DATA\n");
return NOT_ENOUGH_DATA;
}
gpi->nNumShapes = ReadInt32(gpi->nShapePos - 4);
if (gpi->nLen < gpi->nShapePos + 9 * gpi->nNumShapes)
{
msDebug("ParseSqlGeometry NOT_ENOUGH_DATA\n");
return NOT_ENOUGH_DATA;
}
if ( gpi->nNumShapes <= 0 )
{
return NOERROR;
}
// pick up the root shape
if ( ParentOffset(0) != 0xFFFFFFFF)
{
msDebug("ParseSqlGeometry CORRUPT_DATA\n");
return CORRUPT_DATA;
}
// determine the shape type
for (iShape = 0; iShape < gpi->nNumShapes; iShape++)
{
unsigned char shapeType = ShapeType(iShape);
if (shapeType == ST_POINT || shapeType == ST_MULTIPOINT)
{
shape->type = MS_SHAPE_POINT;
break;
}
else if (shapeType == ST_LINESTRING || shapeType == ST_MULTILINESTRING)
{
shape->type = MS_SHAPE_LINE;
break;
}
else if (shapeType == ST_POLYGON || shapeType == ST_MULTIPOLYGON)
{
shape->type = MS_SHAPE_POLYGON;
break;
}
}
shape->line = (lineObj *) msSmallMalloc(sizeof(lineObj) * gpi->nNumFigures);
shape->numlines = gpi->nNumFigures;
// read figures
for (iFigure = 0; iFigure < gpi->nNumFigures; iFigure++)
{
int iPoint, iNextPoint, i;
iPoint = PointOffset(iFigure);
iNextPoint = NextPointOffset(iFigure);
shape->line[iFigure].point = (pointObj *) msSmallMalloc(sizeof(pointObj)*(iNextPoint - iPoint));
i = 0;
while (iPoint < iNextPoint)
{
ReadPoint(gpi, &shape->line[iFigure].point[i], iPoint, i);
++iPoint;
++i;
}
shape->line[iFigure].numpoints = i;
}
}
/* set bounds */
shape->bounds.minx = gpi->minx;
shape->bounds.miny = gpi->miny;
shape->bounds.maxx = gpi->maxx;
shape->bounds.maxy = gpi->maxy;
return NOERROR;
}
/* MS SQL driver code*/
msMSSQL2008LayerInfo *getMSSQL2008LayerInfo(const layerObj *layer)
{
return layer->layerinfo;
}
void setMSSQL2008LayerInfo(layerObj *layer, msMSSQL2008LayerInfo *MSSQL2008layerinfo)
{
layer->layerinfo = (void*) MSSQL2008layerinfo;
}
void handleSQLError(layerObj *layer)
{
SQLCHAR SqlState[6], Msg[SQL_MAX_MESSAGE_LENGTH];
SQLINTEGER NativeError;
SQLSMALLINT i, MsgLen;
SQLRETURN rc;
msMSSQL2008LayerInfo *layerinfo = getMSSQL2008LayerInfo(layer);
if (layerinfo == NULL)
return;
// Get the status records.
i = 1;
while ((rc = SQLGetDiagRec(SQL_HANDLE_STMT, layerinfo->conn->hstmt, i, SqlState, &NativeError,
Msg, sizeof(Msg), &MsgLen)) != SQL_NO_DATA)
{
if(layer->debug)
{
msDebug("SQLError: %s\n", Msg);
}
i++;
}
}
/* remove white space */
/* dont send in empty strings or strings with just " " in them! */
static char* removeWhite(char *str)
{
int initial;
char *orig, *loc;
initial = strspn(str, " ");
if(initial) {
memmove(str, str + initial, strlen(str) - initial + 1);
}
/* now final */
if(strlen(str) == 0) {
return str;
}
if(str[strlen(str) - 1] == ' ') {
/* have to remove from end */
orig = str;
loc = &str[strlen(str) - 1];
while((*loc = ' ') && (loc >orig)) {
*loc = 0;
loc--;
}
}
return str;
}
/* TODO Take a look at glibc's strcasestr */
static char *strstrIgnoreCase(const char *haystack, const char *needle)
{
char *hay_lower;
char *needle_lower;
int len_hay,len_need;
int t;
char *loc;
int match = -1;
len_hay = strlen(haystack);
len_need = strlen(needle);
hay_lower = (char*) msSmallMalloc(len_hay + 1);
needle_lower =(char*) msSmallMalloc(len_need + 1);
for(t = 0; t < len_hay; t++) {
hay_lower[t] = (char)tolower(haystack[t]);
}
hay_lower[t] = 0;
for(t = 0; t < len_need; t++) {
needle_lower[t] = (char)tolower(needle[t]);
}
needle_lower[t] = 0;
loc = strstr(hay_lower, needle_lower);
if(loc) {
match = loc - hay_lower;
}
msFree(hay_lower);
msFree(needle_lower);
return (char *) (match < 0 ? NULL : haystack + match);
}
static int msMSSQL2008LayerParseData(layerObj *layer, char **geom_column_name, char **geom_column_type, char **table_name, char **urid_name, char **user_srid, char **index_name, int debug);
/* Close connection and handles */
static void msMSSQL2008CloseConnection(void *conn_handle)
{
msODBCconn * conn = (msODBCconn *) conn_handle;
if (!conn)
{
return;
}
if (conn->hstmt)
{
SQLFreeHandle(SQL_HANDLE_STMT, conn->hstmt);
}
if (conn->hdbc)
{
SQLDisconnect(conn->hdbc);
SQLFreeHandle(SQL_HANDLE_DBC, conn->hdbc);
}
if (conn->henv)
{
SQLFreeHandle(SQL_HANDLE_ENV, conn->henv);
}
msFree(conn);
}
/* Set the error string for the connection */
static void setConnError(msODBCconn *conn)
{
SQLSMALLINT len;
SQLGetDiagField(SQL_HANDLE_DBC, conn->hdbc, 1, SQL_DIAG_MESSAGE_TEXT, (SQLPOINTER) conn->errorMessage, sizeof(conn->errorMessage), &len);
conn->errorMessage[len] = 0;
}
/* Connect to db */
static msODBCconn * mssql2008Connect(const char * connString)
{
SQLCHAR fullConnString[1024];
SQLRETURN rc;
msODBCconn * conn = msSmallMalloc(sizeof(msODBCconn));
memset(conn, 0, sizeof(*conn));
SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &conn->henv);
SQLSetEnvAttr(conn->henv, SQL_ATTR_ODBC_VERSION, (SQLPOINTER) SQL_OV_ODBC3, 0);
SQLAllocHandle(SQL_HANDLE_DBC, conn->henv, &conn->hdbc);
snprintf((char*)fullConnString, sizeof(fullConnString), "DRIVER=SQL Server;%s", connString);
{
SQLCHAR outConnString[1024];
SQLSMALLINT outConnStringLen;
rc = SQLDriverConnect(conn->hdbc, NULL, fullConnString, SQL_NTS, outConnString, 1024, &outConnStringLen, SQL_DRIVER_NOPROMPT);
}
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO)
{
setConnError(conn);
return conn;
}
SQLAllocHandle(SQL_HANDLE_STMT, conn->hdbc, &conn->hstmt);
return conn;
}
/* Set the error string for the statement execution */
static void setStmntError(msODBCconn *conn)
{
SQLSMALLINT len;
SQLGetDiagField(SQL_HANDLE_STMT, conn->hstmt, 1, SQL_DIAG_MESSAGE_TEXT, (SQLPOINTER) conn->errorMessage, sizeof(conn->errorMessage), &len);
conn->errorMessage[len] = 0;
}
/* Execute SQL against connection. Set error string if failed */
static int executeSQL(msODBCconn *conn, const char * sql)
{
SQLRETURN rc;
SQLCloseCursor(conn->hstmt);
rc = SQLExecDirect(conn->hstmt, (SQLCHAR *) sql, SQL_NTS);
if (rc == SQL_SUCCESS || rc == SQL_SUCCESS_WITH_INFO)
{
return 1;
}
else
{
setStmntError(conn);
return 0;
}
}
/* Get columns name from query results */
static int columnName(msODBCconn *conn, int index, char *buffer, int bufferLength)
{
SQLRETURN rc;
SQLCHAR columnName[SQL_COLUMN_NAME_MAX_LENGTH + 1];
SQLSMALLINT columnNameLen;
SQLSMALLINT dataType;
SQLUINTEGER columnSize;
SQLSMALLINT decimalDigits;
SQLSMALLINT nullable;
rc = SQLDescribeCol(
conn->hstmt,
(SQLUSMALLINT)index,
columnName,
SQL_COLUMN_NAME_MAX_LENGTH,
&columnNameLen,
&dataType,
&columnSize,
&decimalDigits,
&nullable);
if (rc == SQL_SUCCESS || rc == SQL_SUCCESS_WITH_INFO)
{
if (bufferLength < SQL_COLUMN_NAME_MAX_LENGTH + 1)
strlcpy(buffer, (const char *)columnName, bufferLength);
else
strlcpy(buffer, (const char *)columnName, SQL_COLUMN_NAME_MAX_LENGTH + 1);
return 1;
}
else
{
setStmntError(conn);
return 0;
}
}
/* open up a connection to the MS SQL 2008 database using the connection string in layer->connection */
/* ie. "driver=<driver>;server=<server>;database=<database>;integrated security=?;user id=<username>;password=<password>" */
int msMSSQL2008LayerOpen(layerObj *layer)
{
msMSSQL2008LayerInfo *layerinfo;
char *index, *maskeddata;
int i, count;
char *conn_decrypted = NULL;
if(layer->debug) {
msDebug("msMSSQL2008LayerOpen called datastatement: %s\n", layer->data);
}
if(getMSSQL2008LayerInfo(layer)) {
if(layer->debug) {
msDebug("msMSSQL2008LayerOpen :: layer is already open!!\n");
}
return MS_SUCCESS; /* already open */
}
if(!layer->data) {
msSetError(MS_QUERYERR, DATA_ERROR_MESSAGE, "msMSSQL2008LayerOpen()", "", "Error parsing MSSQL2008 data variable: nothing specified in DATA statement.<br><br>\n\nMore Help:<br><br>\n\n");
return MS_FAILURE;
}
if(!layer->connection) {
msSetError( MS_QUERYERR, "MSSQL connection parameter not specified.", "msMSSQL2008LayerOpen()");
return MS_FAILURE;
}
/* have to setup a connection to the database */
layerinfo = (msMSSQL2008LayerInfo*) msSmallMalloc(sizeof(msMSSQL2008LayerInfo));
layerinfo->sql = NULL; /* calc later */
layerinfo->row_num = 0;
layerinfo->geom_column = NULL;
layerinfo->geom_column_type = NULL;
layerinfo->geom_table = NULL;
layerinfo->urid_name = NULL;
layerinfo->user_srid = NULL;
layerinfo->index_name = NULL;
layerinfo->conn = NULL;
layerinfo->conn = (msODBCconn *) msConnPoolRequest(layer);
if(!layerinfo->conn) {
if(layer->debug) {
msDebug("MSMSSQL2008LayerOpen -- shared connection not available.\n");
}
/* Decrypt any encrypted token in connection and attempt to connect */
conn_decrypted = msDecryptStringTokens(layer->map, layer->connection);
if (conn_decrypted == NULL)
{
return(MS_FAILURE); /* An error should already have been produced */
}
layerinfo->conn = mssql2008Connect(conn_decrypted);
msFree(conn_decrypted);
conn_decrypted = NULL;
if(!layerinfo->conn || layerinfo->conn->errorMessage[0])
{
char *errMess = "Out of memory";
msDebug("FAILURE!!!");
maskeddata = (char *)msSmallMalloc(strlen(layer->connection) + 1);
strcpy(maskeddata, layer->connection);
index = strstr(maskeddata, "password=");
if(index != NULL) {
index = (char *)(index + 9);
count = (int)(strstr(index, " ") - index);
for(i = 0; i < count; i++) {
strlcpy(index, "*", (int)1);
index++;
}
}
if (layerinfo->conn)
{
errMess = layerinfo->conn->errorMessage;
}
msSetError(MS_QUERYERR,
"Couldnt make connection to MS SQL Server 2008 with connect string '%s'.\n<br>\n"
"Error reported was '%s'.\n<br>\n\n"
"This error occured when trying to make a connection to the specified SQL server. \n"
"<br>\nMost commonly this is caused by <br>\n"
"(1) incorrect connection string <br>\n"
"(2) you didnt specify a 'user id=...' in your connection string <br>\n"
"(3) SQL server isnt running <br>\n"
"(4) TCPIP not enabled for SQL Client or server <br>\n\n",
"msMSSQL2008LayerOpen()", maskeddata, errMess);
msFree(maskeddata);
msMSSQL2008CloseConnection(layerinfo->conn);
msFree(layerinfo);
return MS_FAILURE;
}
msConnPoolRegister(layer, layerinfo->conn, msMSSQL2008CloseConnection);
}
setMSSQL2008LayerInfo(layer, layerinfo);
if (msMSSQL2008LayerParseData(layer, &layerinfo->geom_column, &layerinfo->geom_column_type, &layerinfo->geom_table, &layerinfo->urid_name, &layerinfo->user_srid, &layerinfo->index_name, layer->debug) != MS_SUCCESS)
{
msSetError( MS_QUERYERR, "Could not parse the layer data", "msMSSQL2008LayerOpen()");
return MS_FAILURE;
}
/* identify the geometry transfer type */
if (msLayerGetProcessingKey( layer, "MSSQL_READ_WKB" ) != NULL)
layerinfo->geometry_format = MSSQLGEOMETRY_WKB;
else
{
layerinfo->geometry_format = MSSQLGEOMETRY_NATIVE;
if (strcasecmp(layerinfo->geom_column_type, "geography") == 0)
layerinfo->gpi.nColType = MSSQLCOLTYPE_GEOGRAPHY;
else
layerinfo->gpi.nColType = MSSQLCOLTYPE_GEOMETRY;
}
return MS_SUCCESS;
}
/* Return MS_TRUE if layer is open, MS_FALSE otherwise. */
int msMSSQL2008LayerIsOpen(layerObj *layer)
{
return getMSSQL2008LayerInfo(layer) ? MS_TRUE : MS_FALSE;
}
/* Free the itemindexes array in a layer. */
void msMSSQL2008LayerFreeItemInfo(layerObj *layer)
{
if(layer->debug) {
msDebug("msMSSQL2008LayerFreeItemInfo called\n");
}
if(layer->iteminfo) {
msFree(layer->iteminfo);
}
layer->iteminfo = NULL;
}
/* allocate the iteminfo index array - same order as the item list */
int msMSSQL2008LayerInitItemInfo(layerObj *layer)
{
int i;
int *itemindexes ;
if (layer->debug) {
msDebug("msMSSQL2008LayerInitItemInfo called\n");
}
if(layer->numitems == 0) {
return MS_SUCCESS;
}
msFree(layer->iteminfo);
layer->iteminfo = (int *) msSmallMalloc(sizeof(int) * layer->numitems);
itemindexes = (int*)layer->iteminfo;
for(i = 0; i < layer->numitems; i++) {
itemindexes[i] = i; /* last one is always the geometry one - the rest are non-geom */
}
return MS_SUCCESS;
}
/* Prepare and execute the SQL statement for this layer */
static int prepare_database(layerObj *layer, rectObj rect, char **query_string)
{
msMSSQL2008LayerInfo *layerinfo;
char *columns_wanted = 0;
char *data_source = 0;
char *f_table_name = 0;
char *geom_table = 0;
/*
"Geometry::STGeomFromText('POLYGON(())',)" + terminator = 40 chars
Plus 10 formatted doubles (15 digits of precision, a decimal point, a space/comma delimiter each = 17 chars each)
Plus SRID + comma - if SRID is a long...we'll be safe with 10 chars
*/
char box3d[40 + 10 * 22 + 11];
char query_string_temp[10000]; /* Should be big enough */
int t;
char *pos_from, *pos_ftab, *pos_space, *pos_paren;
layerinfo = getMSSQL2008LayerInfo(layer);
/* Extract the proper f_table_name from the geom_table string.
* We are expecting the geom_table to be either a single word
* or a sub-select clause that possibly includes a join --
*
* (select column[,column[,...]] from ftab[ natural join table2]) as foo
*
* We are expecting whitespace or a ')' after the ftab name.
*
*/
geom_table = msStrdup(layerinfo->geom_table);
pos_from = strstrIgnoreCase(geom_table, " from ");
if(!pos_from) {
f_table_name = (char *) msSmallMalloc(strlen(geom_table) + 1);
strcpy(f_table_name, geom_table);
} else { /* geom_table is a sub-select clause */
pos_ftab = pos_from + 6; /* This should be the start of the ftab name */
pos_space = strstr(pos_ftab, " "); /* First space */
/* TODO strrchr is POSIX and C99, rindex is neither */
#if defined(_WIN32) && !defined(__CYGWIN__)
pos_paren = strrchr(pos_ftab, ')');
#else
pos_paren = rindex(pos_ftab, ')');
#endif
if(!pos_space || !pos_paren) {
msSetError(MS_QUERYERR, DATA_ERROR_MESSAGE, "prepare_database()", geom_table, "Error parsing MSSQL2008 data variable: Something is wrong with your subselect statement.<br><br>\n\nMore Help:<br><br>\n\n");
return MS_FAILURE;
}
if (pos_paren < pos_space) { /* closing parenthesis preceeds any space */
f_table_name = (char *) msSmallMalloc(pos_paren - pos_ftab + 1);
strlcpy(f_table_name, pos_ftab, pos_paren - pos_ftab + 1);
} else {
f_table_name = (char *) msSmallMalloc(pos_space - pos_ftab + 1);
strlcpy(f_table_name, pos_ftab, pos_space - pos_ftab + 1);
}
}
if(layer->numitems == 0)
{
char buffer[1000];
if (layerinfo->geometry_format == MSSQLGEOMETRY_NATIVE)
snprintf(buffer, sizeof(buffer), "%s,convert(varchar(36), %s)", layerinfo->geom_column, layerinfo->urid_name);
else
snprintf(buffer, sizeof(buffer), "%s.STAsBinary(),convert(varchar(36), %s)", layerinfo->geom_column, layerinfo->urid_name);
columns_wanted = msStrdup(buffer);
}
else
{
char buffer[10000] = "";
for(t = 0; t < layer->numitems; t++) {
snprintf(buffer + strlen(buffer), sizeof(buffer) - strlen(buffer), "convert(varchar(max), %s),", layer->items[t]);
}
if (layerinfo->geometry_format == MSSQLGEOMETRY_NATIVE)
snprintf(buffer + strlen(buffer), sizeof(buffer) - strlen(buffer), "%s,convert(varchar(36), %s)", layerinfo->geom_column, layerinfo->urid_name);
else
snprintf(buffer + strlen(buffer), sizeof(buffer) - strlen(buffer), "%s.STAsBinary(),convert(varchar(36), %s)", layerinfo->geom_column, layerinfo->urid_name);
columns_wanted = msStrdup(buffer);
}
if (rect.minx == rect.maxx || rect.miny == rect.maxy)
{
/* create point shape for rectangles with zero area */
sprintf(box3d, "%s::STGeomFromText('POINT(%.15g %.15g)',%s)", /* %s.STSrid)", */
layerinfo->geom_column_type, rect.minx, rect.miny, layerinfo->user_srid);
}
else
{
sprintf(box3d, "%s::STGeomFromText('POLYGON((%.15g %.15g,%.15g %.15g,%.15g %.15g,%.15g %.15g,%.15g %.15g))',%s)", /* %s.STSrid)", */
layerinfo->geom_column_type,
rect.minx, rect.miny,
rect.maxx, rect.miny,
rect.maxx, rect.maxy,
rect.minx, rect.maxy,
rect.minx, rect.miny,
layerinfo->user_srid
);
}
/* substitute token '!BOX!' in geom_table with the box3d - do an unlimited # of subs */
/* to not undo the work here, we need to make sure that data_source is malloc'd here */
if(!strstr(geom_table, "!BOX!"))
{
data_source = (char *) msSmallMalloc(strlen(geom_table) + 1);
strcpy(data_source, geom_table);
}
else
{
char* result = NULL;
while (strstr(geom_table,"!BOX!"))
{
/* need to do a substition */
char *start, *end;
char *oldresult = result;
start = strstr(geom_table,"!BOX!");
end = start+5;
result = (char *)msSmallMalloc((start - geom_table) + strlen(box3d) + strlen(end) +1);
strlcpy(result, geom_table, start - geom_table + 1);
strcpy(result + (start - geom_table), box3d);
strcat(result, end);
geom_table= result;
msFree(oldresult);
}
/* if we're here, this will be a malloc'd string, so no need to copy it */
data_source = (char *)geom_table;
}
/* use the index hint if provided */
if ( layerinfo->index_name )
{
/* given the template - figure out how much to malloc and malloc it */
char *with_template = "%s WITH (INDEX(%s))";
int need_len = strlen(data_source) + strlen(with_template) + strlen(layerinfo->index_name);
char *tmp = (char*) msSmallMalloc( need_len + 1 );
sprintf( tmp, with_template, data_source, layerinfo->index_name );
msFree(data_source);
data_source = tmp;
}
if(!layer->filter.string)
{
snprintf(query_string_temp, sizeof(query_string_temp), "SELECT %s from %s WHERE %s.STIntersects(%s) = 1 ",
columns_wanted, data_source, layerinfo->geom_column, box3d );
}
else
{
snprintf(query_string_temp, sizeof(query_string_temp), "SELECT %s from %s WHERE (%s) and %s.STIntersects(%s) = 1 ",
columns_wanted, data_source, layer->filter.string, layerinfo->geom_column, box3d );
}
msFree(data_source);
msFree(f_table_name);
msFree(columns_wanted);
if(layer->debug) {
msDebug("query_string_temp:%s\n", query_string_temp);
}
if (executeSQL(layerinfo->conn, query_string_temp))
{
*query_string = msStrdup(query_string_temp);
return MS_SUCCESS;
}
else
{
msSetError(MS_QUERYERR, "Error executing MSSQL2008 SQL statement: %s\n-%s\n", "msMSSQL2008LayerGetShape()", query_string_temp, layerinfo->conn->errorMessage);
return MS_FAILURE;
}
}
/* Execute SQL query for this layer */
int msMSSQL2008LayerWhichShapes(layerObj *layer, rectObj rect, int isQuery)
{
msMSSQL2008LayerInfo *layerinfo = 0;
char *query_str = 0;