analytics/informix/extend/spatial.8.22.FC2/examples/odbc/wkbtosql.c

/**************************************************************************
 *
 * wkbtosql.c
 *
 * This program demonstrates how to insert spatial data into a database
 * in OGIS well-known binary format using the Informix Spatial DataBlade's
 * ST_WkbToSql function.
 *
 * ST_WkbToSql is a special variation on ST_GeomFromWkb which
 * assigns srid = 0 to the input shape.
 *
 * This program creates a table and inserts several polygons into it.
 * For an example program which shows how to insert all spatial types,
 * please see load_wkb.c
 *
 * The following command will likely compile this source:
 *
 *   cc -o wkbtosql wkbtosql.c \
 *        -I$INFORMIXDIR/incl/cli -L$INFORMIXDIR/lib/cli -lifcli -lifdmr
 *
 **************************************************************************/


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <float.h>

#ifdef WINNT
#include <io.h>
#include <windows.h>
#include <conio.h>
#endif

#include <infxcli.h>     /* ODBC typedefs and data structures */
#include "odbcutils.c"   /* ODBC utility functions */

/*
 * Constants, macros, typedefs, data structures, & functions for 
 * processing OGIS well-known-binary format data.
 */
#include "commfuncs.h"
#include "commfuncs.c"
#include "wkbfuncs.c"


void main (int argc, char **argv)
{
    SQLHDBC       hdbc;
    SQLHENV       henv;
    SQLHSTMT      hstmt;
    char          sql_stmt[200];
    int           rc;
    SDWORD        pcbvalue1, pcbvalue2;
    Geometry      geom = {0};
    Point         pt[30];
    int           suboffsets[5];
    int           max_alloced = 0;
    int           lot_id;
    char         *lot_wkb_buf;
    int           lot_wkb_len;

    /* Check for the correct number of arguments entered. */
    if (argc < 2)
    {
        printf ("Usage: %s <datasource>\n", argv[0]);
        exit (1);
    }

    /* Connect to the database. */
    server_connect ((UCHAR *) argv[1], &henv, &hdbc);

    /* Allocate memory for the SQL statement handle and
     * associate the statement handle with the connection handle. */
    rc = SQLAllocHandle (SQL_HANDLE_STMT, hdbc, &hstmt);
	returncode_check (hdbc, (SQLHSTMT)NULL, rc, "SQLAllocHandle");

    rc = SQLExecDirect (hstmt, (UCHAR *) "DROP TABLE lots", SQL_NTS);
    rc = SQLExecDirect (hstmt, (UCHAR *) "CREATE TABLE lots (lot_id integer, lot ST_Geometry)", SQL_NTS);
    returncode_check (NULL, hstmt, rc, "SQLExecDirect");

    /* Initialize entries for non-spatial columns in the table  */
    lot_id = 1010;
    
    /* Populate the polygon point array */
    suboffsets[0] = 0;
    pt[0].x =  2;   pt[0].y = 57;
    pt[1].x = 21.5; pt[1].y = 57;
    pt[2].x = 21.5; pt[2].y = 38;
    pt[3].x =  2;   pt[3].y = 38;
    pt[4].x =  2;   pt[4].y = 57;

    geom.type = geomPolygon;
    geom.num_points    = 5;
    geom.num_parts     = 1;
    geom.num_subparts  = 1;
    geom.suboffsets = suboffsets;
    geom.pt = pt;

    /* Convert the points to a Well Known Binary
     * representation of a polygon. */
    geom_to_wkb (&geom, &max_alloced, &lot_wkb_len, &lot_wkb_buf);
             

    /* INFORMIX_EXTEST_BEGIN wkbtosql */

    /* Create the SQL insert statement to populate the lots table.
     * The question marks are parameter markers that indicate the
     * column values that will be inserted at run time. */
    sprintf(sql_stmt,
            "INSERT INTO lots (lot_id, lot) "
            "VALUES (?, ST_WKBToSQL(?))");

    /* Prepare the SQL statement for execution */
    rc = SQLPrepare (hstmt, (unsigned char *)sql_stmt, SQL_NTS);
    returncode_check (NULL, hstmt, rc, "SQLPrepare");

    /* Bind the lot_id to the first parameter. */
    pcbvalue1 = 0;
    rc = SQLBindParameter (hstmt, 1, SQL_PARAM_INPUT, SQL_C_SLONG,
                           SQL_INTEGER, 0, 0,
                           &lot_id, 0, &pcbvalue1);
    returncode_check (NULL, hstmt, rc, "SQLBindParameter");

    /* Bind the lot geometry to the second parameter. */
    pcbvalue2 = lot_wkb_len;
    rc = SQLBindParameter (hstmt, 2, SQL_PARAM_INPUT, SQL_C_BINARY,
                           SQL_INFX_UDT_LVARCHAR, lot_wkb_len, 0,
                           lot_wkb_buf, lot_wkb_len, &pcbvalue2);
    returncode_check (NULL, hstmt, rc, "SQLBindParameter");

    /* Execute the insert statement. */
    rc = SQLExecute (hstmt);
    returncode_check (NULL, hstmt, rc, "SQLExecute");
 
    /* INFORMIX_EXTEST_END wkbtosql */

    SQLFreeStmt (hstmt, SQL_CLOSE);          /* Close the statement handle */
    SQLFreeHandle (SQL_HANDLE_STMT, hstmt);  /* Free the statement handle */
    SQLDisconnect (hdbc);                    /* Close the connection */
    SQLFreeHandle (SQL_HANDLE_DBC, hdbc);    /* Free the database handle */
    SQLFreeHandle (SQL_HANDLE_ENV, henv);    /* Free the ODBC environment */
    printf( "\nTest Complete\n");
}