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mapmssql2008.c
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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: MS SQL Server Layer Connector
* Author: Richard Hillman - based on PostGIS and SpatialDB connectors
* Tamas Szekeres - maintenance
*
******************************************************************************
* 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"
#include "mapows.h"
#ifdef USE_MSSQL2008
#include <windows.h>
#include <sql.h>
#include <sqlext.h>
#include <sqltypes.h>
#include <string.h>
#include <ctype.h> /* tolower() */
/* SqlGeometry/SqlGeography serialization format
Simple Point (SerializationProps & IsSinglePoint)
[SRID][0x01][SerializationProps][Point][z][m]
Simple Line Segment (SerializationProps & IsSingleLineSegment)
[SRID][0x01][SerializationProps][Point1][Point2][z1][z2][m1][m2]
Complex Geometries
[SRID][VersionAttribute][SerializationProps][NumPoints][Point1]..[PointN][z1]..[zN][m1]..[mN]
[NumFigures][Figure]..[Figure][NumShapes][Shape]..[Shape]
Complex Geometries (FigureAttribute == Curve)
[SRID][VersionAttribute][SerializationProps][NumPoints][Point1]..[PointN][z1]..[zN][m1]..[mN]
[NumFigures][Figure]..[Figure][NumShapes][Shape]..[Shape][NumSegments][SegmentType]..[SegmentType]
VersionAttribute (1 byte)
0x01 = Katmai (MSSQL2008+)
0x02 = Denali (MSSQL2012+)
SRID
Spatial Reference Id (4 bytes)
SerializationProps (bitmask) 1 byte
0x01 = HasZValues
0x02 = HasMValues
0x04 = IsValid
0x08 = IsSinglePoint
0x10 = IsSingleLineSegment
0x20 = IsLargerThanAHemisphere
Point (2-4)x8 bytes, size depends on SerializationProps & HasZValues & HasMValues
[x][y] - SqlGeometry
[latitude][longitude] - SqlGeography
Figure
[FigureAttribute][PointOffset]
FigureAttribute - Katmai (1 byte)
0x00 = Interior Ring
0x01 = Stroke
0x02 = Exterior Ring
FigureAttribute - Denali (1 byte)
0x00 = None
0x01 = Line
0x02 = Arc
0x03 = Curve
Shape
[ParentFigureOffset][FigureOffset][ShapeType]
ShapeType (1 byte)
0x00 = Unknown
0x01 = Point
0x02 = LineString
0x03 = Polygon
0x04 = MultiPoint
0x05 = MultiLineString
0x06 = MultiPolygon
0x07 = GeometryCollection
-- Denali
0x08 = CircularString
0x09 = CompoundCurve
0x0A = CurvePolygon
0x0B = FullGlobe
SegmentType (1 byte)
0x00 = Line
0x01 = Arc
0x02 = FirstLine
0x03 = FirstArc
*/
/* 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_ISLARGERTHANAHEMISPHERE 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 ST_CIRCULARSTRING 8
#define ST_COMPOUNDCURVE 9
#define ST_CURVEPOLYGON 10
#define ST_FULLGLOBE 11
#define SMT_LINE 0
#define SMT_ARC 1
#define SMT_FIRSTLINE 2
#define SMT_FIRSTARC 3
#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 SegmentType(iSegment) (ReadByte(gpi->nSegmentPos + (iSegment)))
#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 + 16 * (iPoint)))
#define ReadY(iPoint) (ReadDouble(gpi->nPointPos + 16 * (iPoint) + 8))
#define ReadZ(iPoint) (ReadDouble(gpi->nPointPos + 16 * gpi->nNumPoints + 8 * (iPoint)))
#define ReadM(iPoint) (ReadDouble(gpi->nPointPos + 24 * gpi->nNumPoints + 8 * (iPoint)))
#define FP_EPSILON 1e-12
#define SEGMENT_ANGLE 5.0
#define SEGMENT_MINPOINTS 10
/* Native geometry parser struct */
typedef struct msGeometryParserInfo_t {
unsigned char* pszData;
int nLen;
/* version */
char chVersion;
/* serialization properties */
char chProps;
/* point array */
int nPointSize;
int nPointPos;
int nNumPoints;
int nNumPointsRead;
/* figure array */
int nFigurePos;
int nNumFigures;
/* shape array */
int nShapePos;
int nNumShapes;
int nSRSId;
/* segment array */
int nSegmentPos;
int nNumSegments;
/* 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... */
char *sort_spec; /* the sort by specification which should be applied to the generated select statement */
int mssqlversion_major; /* the sql server major version number */
SQLSMALLINT *itemtypes; /* storing the sql field types for further reference */
msODBCconn * conn; /* Connection to db */
msGeometryParserInfo gpi; /* struct for the geometry parser */
int geometry_format; /* Geometry format to be retrieved from the database */
tokenListNodeObjPtr current_node; /* filter expression translation */
} 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)
{
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 (gpi->nNumPointsRead++ == 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) && (gpi->chProps & SP_HASMVALUES))
{
p->z = ReadZ(iPoint);
p->m = ReadM(iPoint);
}
else if (gpi->chProps & SP_HASZVALUES)
{
p->z = ReadZ(iPoint);
p->m = 0.0;
}
else if (gpi->chProps & SP_HASMVALUES)
{
p->z = 0.0;
p->m = ReadZ(iPoint);
}
else
{
p->z = 0.0;
p->m = 0.0;
}
#endif
}
int StrokeArcToLine(msGeometryParserInfo* gpi, lineObj* line, int index)
{
if (index > 1) {
double x, y, x1, y1, x2, y2, x3, y3, dxa, dya, sxa, sya, dxb, dyb;
double d, sxb, syb, ox, oy, a1, a3, sa, da, a, radius;
int numpoints;
#ifdef USE_POINT_Z_M
double z;
z = line->point[index].z; /* must be equal for arc segments */
#endif
/* first point */
x1 = line->point[index - 2].x;
y1 = line->point[index - 2].y;
/* second point */
x2 = line->point[index - 1].x;
y2 = line->point[index - 1].y;
/* third point */
x3 = line->point[index].x;
y3 = line->point[index].y;
sxa = (x1 + x2);
sya = (y1 + y2);
dxa = x2 - x1;
dya = y2 - y1;
sxb = (x2 + x3);
syb = (y2 + y3);
dxb = x3 - x2;
dyb = y3 - y2;
d = (dxa * dyb - dya * dxb) * 2;
if (fabs(d) < FP_EPSILON) {
/* points are colinear, nothing to do here */
return index;
}
/* calculating the center of circle */
ox = ((sya - syb) * dya * dyb + sxa * dyb * dxa - sxb * dya * dxb) / d;
oy = ((sxb - sxa) * dxa * dxb + syb * dyb * dxa - sya * dya * dxb) / d;
radius = sqrt((x1 - ox) * (x1 - ox) + (y1 - oy) * (y1 - oy));
/* calculating the angle to be used */
a1 = atan2(y1 - oy, x1 - ox);
a3 = atan2(y3 - oy, x3 - ox);
if (d > 0) {
/* draw counterclockwise */
if (a3 > a1) /* Wrapping past 180? */
sa = a3 - a1;
else
sa = a3 - a1 + 2.0 * M_PI ;
}
else {
if (a3 > a1) /* Wrapping past 180? */
sa = a3 - a1 + 2.0 * M_PI;
else
sa = a3 - a1;
}
numpoints = (int)floor(fabs(sa) * 180 / SEGMENT_ANGLE / M_PI);
if (numpoints < SEGMENT_MINPOINTS)
numpoints = SEGMENT_MINPOINTS;
da = sa / numpoints;
/* extend the point array */
line->numpoints += numpoints - 2;
line->point = msSmallRealloc(line->point, sizeof(pointObj) * line->numpoints);
--index;
a = a1 + da;
while (numpoints > 1) {
line->point[index].x = x = ox + radius * cos(a);
line->point[index].y = y = oy + radius * sin(a);
#ifdef USE_POINT_Z_M
line->point[index].z = z;
#endif
/* calculate bounds */
if (gpi->minx > x) gpi->minx = x;
else if (gpi->maxx < x) gpi->maxx = x;
if (gpi->miny > y) gpi->miny = y;
else if (gpi->maxy < y) gpi->maxy = y;
a += da;
++index;
--numpoints;
}
/* set last point */
line->point[index].x = x3;
line->point[index].y = y3;
#ifdef USE_POINT_Z_M
line->point[index].z = z;
#endif
}
return index;
}
int ParseSqlGeometry(msMSSQL2008LayerInfo* layerinfo, shapeObj *shape)
{
msGeometryParserInfo* gpi = &layerinfo->gpi;
gpi->nNumPointsRead = 0;
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);
gpi->chVersion = ReadByte(4);
if (gpi->chVersion > 2) {
msDebug("ParseSqlGeometry CORRUPT_DATA\n");
return CORRUPT_DATA;
}
gpi->chProps = ReadByte(5);
gpi->nPointSize = 16;
if ( gpi->chProps & SP_HASMVALUES )
gpi->nPointSize += 8;
if ( gpi->chProps & SP_HASZVALUES )
gpi->nPointSize += 8;
if ( gpi->chProps & SP_ISSINGLEPOINT ) {
// single point geometry
gpi->nNumPoints = 1;
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);
} else if ( gpi->chProps & SP_ISSINGLELINESEGMENT ) {
// single line segment with 2 points
gpi->nNumPoints = 2;
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);
ReadPoint(gpi, &shape->line[0].point[1], 1);
} else {
int iShape, iFigure, iSegment;
// 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 ||
shapeType == ST_CIRCULARSTRING || shapeType == ST_COMPOUNDCURVE) {
shape->type = MS_SHAPE_LINE;
break;
} else if (shapeType == ST_POLYGON || shapeType == ST_MULTIPOLYGON ||
shapeType == ST_CURVEPOLYGON)
{
shape->type = MS_SHAPE_POLYGON;
break;
}
}
shape->line = (lineObj *) msSmallMalloc(sizeof(lineObj) * gpi->nNumFigures);
shape->numlines = gpi->nNumFigures;
gpi->nNumSegments = 0;
// 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));
shape->line[iFigure].numpoints = iNextPoint - iPoint;
i = 0;
if (gpi->chVersion == 0x02 && FigureAttribute(iFigure) >= 0x02) {
int nPointPrepared = 0;
lineObj* line = &shape->line[iFigure];
if (FigureAttribute(iFigure) == 0x03) {
if (gpi->nNumSegments == 0) {
/* position of the segment types */
gpi->nSegmentPos = gpi->nShapePos + 9 * gpi->nNumShapes + 4;
gpi->nNumSegments = ReadInt32(gpi->nSegmentPos - 4);
if (gpi->nLen < gpi->nSegmentPos + gpi->nNumSegments) {
msDebug("ParseSqlGeometry NOT_ENOUGH_DATA\n");
return NOT_ENOUGH_DATA;
}
iSegment = 0;
}
while (iPoint < iNextPoint && iSegment < gpi->nNumSegments) {
ReadPoint(gpi, &line->point[i], iPoint);
++iPoint;
++nPointPrepared;
if (nPointPrepared == 2 && (SegmentType(iSegment) == SMT_FIRSTLINE || SegmentType(iSegment) == SMT_LINE)) {
++iSegment;
nPointPrepared = 1;
}
else if (nPointPrepared == 3 && (SegmentType(iSegment) == SMT_FIRSTARC || SegmentType(iSegment) == SMT_ARC)) {
i = StrokeArcToLine(gpi, line, i);
++iSegment;
nPointPrepared = 1;
}
++i;
}
}
else {
while (iPoint < iNextPoint) {
ReadPoint(gpi, &line->point[i], iPoint);
++iPoint;
++nPointPrepared;
if (nPointPrepared == 3) {
i = StrokeArcToLine(gpi, line, i);
nPointPrepared = 1;
}
++i;
}
}
}
else {
while (iPoint < iNextPoint) {
ReadPoint(gpi, &shape->line[iFigure].point[i], iPoint);
++iPoint;
++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];
SQLLEN 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, char **sort_spec, 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 outConnString[1024];
SQLSMALLINT outConnStringLen;
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);
if (strcasestr(connString, "DRIVER=") == 0)
{
SQLCHAR fullConnString[1024];
snprintf((char*)fullConnString, sizeof(fullConnString), "DRIVER={SQL Server};%s", connString);
rc = SQLDriverConnect(conn->hdbc, NULL, fullConnString, SQL_NTS, outConnString, 1024, &outConnStringLen, SQL_DRIVER_NOPROMPT);
}
else
{
rc = SQLDriverConnect(conn->hdbc, NULL, connString, 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, layerObj *layer, char pass_field_def, SQLSMALLINT *itemType)
{
SQLRETURN rc;
SQLCHAR columnName[SQL_COLUMN_NAME_MAX_LENGTH + 1];
SQLSMALLINT columnNameLen;
SQLSMALLINT dataType;
SQLULEN columnSize;
SQLSMALLINT decimalDigits;
SQLSMALLINT nullable;
msMSSQL2008LayerInfo *layerinfo = getMSSQL2008LayerInfo(layer);
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);
*itemType = dataType;
if (pass_field_def) {
char md_item_name[256];
char gml_width[32], gml_precision[32];
const char *gml_type = NULL;
gml_width[0] = '\0';
gml_precision[0] = '\0';
switch( dataType ) {
case SQL_INTEGER:
case SQL_SMALLINT:
case SQL_TINYINT:
gml_type = "Integer";
break;
case SQL_BIGINT:
gml_type = "Long";
break;
case SQL_REAL:
case SQL_FLOAT:
case SQL_DOUBLE:
case SQL_DECIMAL:
case SQL_NUMERIC:
gml_type = "Real";
if( decimalDigits > 0 )
sprintf( gml_precision, "%d", decimalDigits );
break;
case SQL_TYPE_DATE:
gml_type = "Date";
break;
case SQL_TYPE_TIME:
gml_type = "Time";
break;
case SQL_TYPE_TIMESTAMP:
gml_type = "DateTime";
break;
case SQL_BIT:
gml_type = "Boolean";
break;
default:
gml_type = "Character";
break;
}
if( columnSize > 0 )
sprintf( gml_width, "%d", columnSize );
snprintf( md_item_name, sizeof(md_item_name), "gml_%s_type", buffer );
if( msOWSLookupMetadata(&(layer->metadata), "G", "type") == NULL )
msInsertHashTable(&(layer->metadata), md_item_name, gml_type );
snprintf( md_item_name, sizeof(md_item_name), "gml_%s_width", buffer );
if( strlen(gml_width) > 0
&& msOWSLookupMetadata(&(layer->metadata), "G", "width") == NULL )
msInsertHashTable(&(layer->metadata), md_item_name, gml_width );
snprintf( md_item_name, sizeof(md_item_name), "gml_%s_precision",buffer );
if( strlen(gml_precision) > 0
&& msOWSLookupMetadata(&(layer->metadata), "G", "precision")==NULL )
msInsertHashTable(&(layer->metadata), md_item_name, gml_precision );
snprintf( md_item_name, sizeof(md_item_name), "gml_%s_nillable",buffer );
if( nullable > 0 )
msInsertHashTable(&(layer->metadata), md_item_name, "true" );
}
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->sort_spec = NULL;
layerinfo->conn = NULL;
layerinfo->itemtypes = NULL;
layerinfo->mssqlversion_major = 0;
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;