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output-pgsql.c
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output-pgsql.c
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/* Implements the mid-layer processing for osm2pgsql
* using several PostgreSQL tables
*
* This layer stores data read in from the planet.osm file
* and is then read by the backend processing code to
* emit the final geometry-enabled output formats
*/
#include "config.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <time.h>
#ifdef HAVE_PTHREAD
#include <pthread.h>
#endif
#include <libpq-fe.h>
#include "osmtypes.h"
#include "output.h"
#include "reprojection.h"
#include "output-pgsql.h"
#include "build_geometry.h"
#include "middle.h"
#include "pgsql.h"
#include "expire-tiles.h"
#include "wildcmp.h"
#include "node-ram-cache.h"
#include "tagtransform.h"
#define SRID (project_getprojinfo()->srs)
/* FIXME: Shouldn't malloc this all to begin with but call realloc()
as required. The program will most likely segfault if it reads a
style file with more styles than this */
#define MAX_STYLES 1000
enum table_id {
t_point, t_line, t_poly, t_roads
};
static const struct output_options *Options;
/* enable output of a generated way_area tag to either hstore or its own column */
static int enable_way_area=1;
/* Tables to output */
static struct s_table {
char *name;
const char *type;
PGconn *sql_conn;
char buffer[1024];
unsigned int buflen;
int copyMode;
char *columns;
} tables [] = {
{ .name = "%s_point", .type = "POINT" },
{ .name = "%s_line", .type = "LINESTRING"},
{ .name = "%s_polygon", .type = "GEOMETRY" }, /* Actually POLGYON & MULTIPOLYGON but no way to limit to just these two */
{ .name = "%s_roads", .type = "LINESTRING"}
};
#define NUM_TABLES ((signed)(sizeof(tables) / sizeof(tables[0])))
static struct flagsname {
char *name;
int flag;
} tagflags[] = {
{ .name = "polygon", .flag = FLAG_POLYGON },
{ .name = "linear", .flag = FLAG_LINEAR },
{ .name = "nocache", .flag = FLAG_NOCACHE },
{ .name = "delete", .flag = FLAG_DELETE },
{ .name = "phstore", .flag = FLAG_PHSTORE }
};
#define NUM_FLAGS ((signed)(sizeof(tagflags) / sizeof(tagflags[0])))
struct taginfo *exportList[4]; /* Indexed by enum table_id */
int exportListCount[4];
static int pgsql_delete_way_from_output(osmid_t osm_id);
static int pgsql_delete_relation_from_output(osmid_t osm_id);
static int pgsql_process_relation(osmid_t id, struct member *members, int member_count, struct keyval *tags, int exists);
void read_style_file( const char *filename )
{
FILE *in;
int lineno = 0;
int num_read = 0;
char osmtype[24];
char tag[64];
char datatype[24];
char flags[128];
int i;
char *str;
int fields;
struct taginfo temp;
char buffer[1024];
int flag = 0;
exportList[OSMTYPE_NODE] = malloc( sizeof(struct taginfo) * MAX_STYLES );
exportList[OSMTYPE_WAY] = malloc( sizeof(struct taginfo) * MAX_STYLES );
in = fopen( filename, "rt" );
if( !in )
{
fprintf( stderr, "Couldn't open style file '%s': %s\n", filename, strerror(errno) );
exit_nicely();
}
while( fgets( buffer, sizeof(buffer), in) != NULL )
{
lineno++;
str = strchr( buffer, '#' );
if( str )
*str = '\0';
fields = sscanf( buffer, "%23s %63s %23s %127s", osmtype, tag, datatype, flags );
if( fields <= 0 ) /* Blank line */
continue;
if( fields < 3 )
{
fprintf( stderr, "Error reading style file line %d (fields=%d)\n", lineno, fields );
exit_nicely();
}
temp.name = strdup(tag);
temp.type = strdup(datatype);
temp.flags = 0;
for( str = strtok( flags, ",\r\n" ); str; str = strtok(NULL, ",\r\n") )
{
for( i=0; i<NUM_FLAGS; i++ )
{
if( strcmp( tagflags[i].name, str ) == 0 )
{
temp.flags |= tagflags[i].flag;
break;
}
}
if( i == NUM_FLAGS )
fprintf( stderr, "Unknown flag '%s' line %d, ignored\n", str, lineno );
}
if ((temp.flags!=FLAG_DELETE) && ((strchr(temp.name,'?') != NULL) || (strchr(temp.name,'*') != NULL))) {
fprintf( stderr, "wildcard '%s' in non-delete style entry\n",temp.name);
exit_nicely();
}
if ((0==strcmp(temp.name,"way_area")) && (temp.flags==FLAG_DELETE)) {
enable_way_area=0;
}
temp.count = 0;
/* printf("%s %s %d %d\n", temp.name, temp.type, temp.polygon, offset ); */
if( strstr( osmtype, "node" ) )
{
memcpy( &exportList[ OSMTYPE_NODE ][ exportListCount[ OSMTYPE_NODE ] ], &temp, sizeof(temp) );
exportListCount[ OSMTYPE_NODE ]++;
flag = 1;
}
if( strstr( osmtype, "way" ) )
{
memcpy( &exportList[ OSMTYPE_WAY ][ exportListCount[ OSMTYPE_WAY ] ], &temp, sizeof(temp) );
exportListCount[ OSMTYPE_WAY ]++;
flag = 1;
}
if( !flag )
{
fprintf( stderr, "Weird style line %d\n", lineno );
exit_nicely();
}
num_read++;
}
if (ferror(in)) {
perror(filename);
exit_nicely();
}
if (num_read == 0) {
fprintf(stderr, "Unable to parse any valid columns from the style file. Aborting.\n");
exit_nicely();
}
fclose(in);
}
static void free_style_refs(const char *name, const char *type)
{
/* Find and remove any other references to these pointers
This would be way easier if we kept a single list of styles
Currently this scales with n^2 number of styles */
int i,j;
for (i=0; i<NUM_TABLES; i++) {
for(j=0; j<exportListCount[i]; j++) {
if (exportList[i][j].name == name)
exportList[i][j].name = NULL;
if (exportList[i][j].type == type)
exportList[i][j].type = NULL;
}
}
}
static void free_style(void)
{
int i, j;
for (i=0; i<NUM_TABLES; i++) {
for(j=0; j<exportListCount[i]; j++) {
free(exportList[i][j].name);
free(exportList[i][j].type);
free_style_refs(exportList[i][j].name, exportList[i][j].type);
}
}
for (i=0; i<NUM_TABLES; i++)
free(exportList[i]);
}
/* Handles copying out, but coalesces the data into large chunks for
* efficiency. PostgreSQL doesn't actually need this, but each time you send
* a block of data you get 5 bytes of overhead. Since we go column by column
* with most empty and one byte delimiters, without this optimisation we
* transfer three times the amount of data necessary.
*/
void copy_to_table(enum table_id table, const char *sql)
{
PGconn *sql_conn = tables[table].sql_conn;
unsigned int len = strlen(sql);
unsigned int buflen = tables[table].buflen;
char *buffer = tables[table].buffer;
/* Return to copy mode if we dropped out */
if( !tables[table].copyMode )
{
pgsql_exec(sql_conn, PGRES_COPY_IN, "COPY %s (%s,way) FROM STDIN", tables[table].name, tables[table].columns);
tables[table].copyMode = 1;
}
/* If the combination of old and new data is too big, flush old data */
if( (unsigned)(buflen + len) > sizeof( tables[table].buffer )-10 )
{
pgsql_CopyData(tables[table].name, sql_conn, buffer);
buflen = 0;
/* If new data by itself is also too big, output it immediately */
if( (unsigned)len > sizeof( tables[table].buffer )-10 )
{
pgsql_CopyData(tables[table].name, sql_conn, sql);
len = 0;
}
}
/* Normal case, just append to buffer */
if( len > 0 )
{
strcpy( buffer+buflen, sql );
buflen += len;
len = 0;
}
/* If we have completed a line, output it */
if( buflen > 0 && buffer[buflen-1] == '\n' )
{
pgsql_CopyData(tables[table].name, sql_conn, buffer);
buflen = 0;
}
tables[table].buflen = buflen;
}
static void pgsql_out_cleanup(void)
{
int i;
for (i=0; i<NUM_TABLES; i++) {
if (tables[i].sql_conn) {
PQfinish(tables[i].sql_conn);
tables[i].sql_conn = NULL;
}
}
}
/* Escape data appropriate to the type */
static void escape_type(char *sql, int len, const char *value, const char *type) {
int items;
static int tmplen=0;
static char *tmpstr;
if (len > tmplen) {
tmpstr=realloc(tmpstr,len);
tmplen=len;
}
strcpy(tmpstr,value);
if ( !strcmp(type, "int4") ) {
int from, to;
/* For integers we take the first number, or the average if it's a-b */
items = sscanf(value, "%d-%d", &from, &to);
if ( items == 1 ) {
sprintf(sql, "%d", from);
} else if ( items == 2 ) {
sprintf(sql, "%d", (from + to) / 2);
} else {
sprintf(sql, "\\N");
}
} else {
/*
try to "repair" real values as follows:
* assume "," to be a decimal mark which need to be replaced by "."
* like int4 take the first number, or the average if it's a-b
* assume SI unit (meters)
* convert feet to meters (1 foot = 0.3048 meters)
* reject anything else
*/
if ( !strcmp(type, "real") ) {
int i,slen;
float from,to;
slen=strlen(value);
for (i=0;i<slen;i++) if (tmpstr[i]==',') tmpstr[i]='.';
items = sscanf(tmpstr, "%f-%f", &from, &to);
if ( items == 1 ) {
if ((tmpstr[slen-2]=='f') && (tmpstr[slen-1]=='t')) {
from*=0.3048;
}
sprintf(sql, "%f", from);
} else if ( items == 2 ) {
if ((tmpstr[slen-2]=='f') && (tmpstr[slen-1]=='t')) {
from*=0.3048;
to*=0.3048;
}
sprintf(sql, "%f", (from + to) / 2);
} else {
sprintf(sql, "\\N");
}
} else {
escape(sql, len, value);
}
}
}
static void write_hstore(enum table_id table, struct keyval *tags)
{
static char *sql;
static size_t sqllen=0;
size_t hlen;
/* a clone of the tags pointer */
struct keyval *xtags = tags;
/* sql buffer */
if (sqllen==0) {
sqllen=2048;
sql=malloc(sqllen);
}
/* while this tags has a follow-up.. */
while (xtags->next->key != NULL)
{
/* hard exclude z_order tag and keys which have their own column */
if ((xtags->next->has_column) || (strcmp("z_order",xtags->next->key)==0)) {
/* update the tag-pointer to point to the next tag */
xtags = xtags->next;
continue;
}
/*
hstore ASCII representation looks like
"<key>"=>"<value>"
we need at least strlen(key)+strlen(value)+6+'\0' bytes
in theory any single character could also be escaped
thus we need an additional factor of 2.
The maximum lenght of a single hstore element is thus
calcuated as follows:
*/
hlen=2 * (strlen(xtags->next->key) + strlen(xtags->next->value)) + 7;
/* if the sql buffer is too small */
if (hlen > sqllen) {
sqllen = hlen;
sql = realloc(sql, sqllen);
}
/* pack the tag with its value into the hstore */
keyval2hstore(sql, xtags->next);
copy_to_table(table, sql);
/* update the tag-pointer to point to the next tag */
xtags = xtags->next;
/* if the tag has a follow up, add a comma to the end */
if (xtags->next->key != NULL)
copy_to_table(table, ",");
}
/* finish the hstore column by placing a TAB into the data stream */
copy_to_table(table, "\t");
/* the main hstore-column has now been written */
}
/* write an hstore column to the database */
static void write_hstore_columns(enum table_id table, struct keyval *tags)
{
static char *sql;
static size_t sqllen=0;
char *shortkey;
/* the index of the current hstore column */
int i_hstore_column;
int found;
struct keyval *xtags;
char *pos;
size_t hlen;
/* sql buffer */
if (sqllen==0) {
sqllen=2048;
sql=malloc(sqllen);
}
/* iterate over all configured hstore colums in the options */
for(i_hstore_column = 0; i_hstore_column < Options->n_hstore_columns; i_hstore_column++)
{
/* did this node have a tag that matched the current hstore column */
found = 0;
/* a clone of the tags pointer */
xtags = tags;
/* while this tags has a follow-up.. */
while (xtags->next->key != NULL) {
/* check if the tag's key starts with the name of the hstore column */
pos = strstr(xtags->next->key, Options->hstore_columns[i_hstore_column]);
/* and if it does.. */
if(pos == xtags->next->key)
{
/* remember we found one */
found=1;
/* generate the short key name */
shortkey = xtags->next->key + strlen(Options->hstore_columns[i_hstore_column]);
/* calculate the size needed for this hstore entry */
hlen=2*(strlen(shortkey)+strlen(xtags->next->value))+7;
/* if the sql buffer is too small */
if (hlen > sqllen) {
/* resize it */
sqllen=hlen;
sql=realloc(sql,sqllen);
}
/* and pack the shortkey with its value into the hstore */
keyval2hstore_manual(sql, shortkey, xtags->next->value);
copy_to_table(table, sql);
/* update the tag-pointer to point to the next tag */
xtags=xtags->next;
/* if the tag has a follow up, add a comma to the end */
if (xtags->next->key != NULL)
copy_to_table(table, ",");
}
else
{
/* update the tag-pointer to point to the next tag */
xtags=xtags->next;
}
}
/* if no matching tag has been found, write a NULL */
if(!found)
copy_to_table(table, "\\N");
/* finish the hstore column by placing a TAB into the data stream */
copy_to_table(table, "\t");
}
/* all hstore-columns have now been written */
}
/* example from: pg_dump -F p -t planet_osm gis
COPY planet_osm (osm_id, name, place, landuse, leisure, "natural", man_made, waterway, highway, railway, amenity, tourism, learning, building, bridge, layer, way) FROM stdin;
17959841 \N \N \N \N \N \N \N bus_stop \N \N \N \N \N \N -\N 0101000020E610000030CCA462B6C3D4BF92998C9B38E04940
17401934 The Horn \N \N \N \N \N \N \N \N pub \N \N \N \N -\N 0101000020E6100000C12FC937140FD5BFB4D2F4FB0CE04940
...
mine - 01 01000000 48424298424242424242424256427364
psql - 01 01000020 E6100000 30CCA462B6C3D4BF92998C9B38E04940
01 01000020 E6100000 48424298424242424242424256427364
0x2000_0000 = hasSRID, following 4 bytes = srid, not supported by geos WKBWriter
Workaround - output SRID=4326;<WKB>
*/
static int pgsql_out_node(osmid_t id, struct keyval *tags, double node_lat, double node_lon)
{
int filter = tagtransform_filter_node_tags(tags);
static char *sql;
static size_t sqllen=0;
int i;
struct keyval *tag;
if (filter) return 1;
if (sqllen==0) {
sqllen=2048;
sql=malloc(sqllen);
}
expire_tiles_from_bbox(node_lon, node_lat, node_lon, node_lat);
sprintf(sql, "%" PRIdOSMID "\t", id);
copy_to_table(t_point, sql);
for (i=0; i < exportListCount[OSMTYPE_NODE]; i++) {
if( exportList[OSMTYPE_NODE][i].flags & FLAG_DELETE )
continue;
if( (exportList[OSMTYPE_NODE][i].flags & FLAG_PHSTORE) == FLAG_PHSTORE)
continue;
if ((tag = getTag(tags, exportList[OSMTYPE_NODE][i].name)))
{
escape_type(sql, sqllen, tag->value, exportList[OSMTYPE_NODE][i].type);
exportList[OSMTYPE_NODE][i].count++;
if (HSTORE_NORM==Options->enable_hstore)
tag->has_column=1;
}
else
sprintf(sql, "\\N");
copy_to_table(t_point, sql);
copy_to_table(t_point, "\t");
}
/* hstore columns */
write_hstore_columns(t_point, tags);
/* check if a regular hstore is requested */
if (Options->enable_hstore)
write_hstore(t_point, tags);
#ifdef FIXED_POINT
// guarantee that we use the same values as in the node cache
scale = Options->scale;
node_lon = FIX_TO_DOUBLE(DOUBLE_TO_FIX(node_lon));
node_lat = FIX_TO_DOUBLE(DOUBLE_TO_FIX(node_lat));
#endif
sprintf(sql, "SRID=%d;POINT(%.15g %.15g)", SRID, node_lon, node_lat);
copy_to_table(t_point, sql);
copy_to_table(t_point, "\n");
return 0;
}
static void write_wkts(osmid_t id, struct keyval *tags, const char *wkt, enum table_id table)
{
static char *sql;
static size_t sqllen=0;
int j;
struct keyval *tag;
if (sqllen==0) {
sqllen=2048;
sql=malloc(sqllen);
}
sprintf(sql, "%" PRIdOSMID "\t", id);
copy_to_table(table, sql);
for (j=0; j < exportListCount[OSMTYPE_WAY]; j++) {
if( exportList[OSMTYPE_WAY][j].flags & FLAG_DELETE )
continue;
if( (exportList[OSMTYPE_WAY][j].flags & FLAG_PHSTORE) == FLAG_PHSTORE)
continue;
if ((tag = getTag(tags, exportList[OSMTYPE_WAY][j].name)))
{
exportList[OSMTYPE_WAY][j].count++;
escape_type(sql, sqllen, tag->value, exportList[OSMTYPE_WAY][j].type);
if (HSTORE_NORM==Options->enable_hstore)
tag->has_column=1;
}
else
sprintf(sql, "\\N");
copy_to_table(table, sql);
copy_to_table(table, "\t");
}
/* hstore columns */
write_hstore_columns(table, tags);
/* check if a regular hstore is requested */
if (Options->enable_hstore)
write_hstore(table, tags);
sprintf(sql, "SRID=%d;", SRID);
copy_to_table(table, sql);
copy_to_table(table, wkt);
copy_to_table(table, "\n");
}
/*static int tag_indicates_polygon(enum OsmType type, const char *key)
{
int i;
if (!strcmp(key, "area"))
return 1;
for (i=0; i < exportListCount[type]; i++) {
if( strcmp( exportList[type][i].name, key ) == 0 )
return exportList[type][i].flags & FLAG_POLYGON;
}
return 0;
}*/
/*
COPY planet_osm (osm_id, name, place, landuse, leisure, "natural", man_made, waterway, highway, railway, amenity, tourism, learning, bu
ilding, bridge, layer, way) FROM stdin;
198497 Bedford Road \N \N \N \N \N \N residential \N \N \N \N \N \N \N 0102000020E610000004000000452BF702B342D5BF1C60E63BF8DF49406B9C4D470037D5BF5471E316F3DF4940DFA815A6EF35D5BF9AE95E27F5DF4940B41EB
E4C1421D5BF24D06053E7DF4940
212696 Oswald Road \N \N \N \N \N \N minor \N \N \N \N \N \N \N 0102000020E610000004000000467D923B6C22D5BFA359D93EE4DF4940B3976DA7AD11D5BF84BBB376DBDF4940997FF44D9A06D5BF4223D8B8FEDF49404D158C4AEA04D
5BF5BB39597FCDF4940
*/
static int pgsql_out_way(osmid_t id, struct keyval *tags, struct osmNode *nodes, int count, int exists)
{
int polygon = 0, roads = 0;
int i, wkt_size;
double split_at;
double area;
/* If the flag says this object may exist already, delete it first */
if(exists) {
pgsql_delete_way_from_output(id);
Options->mid->way_changed(id);
}
if (tagtransform_filter_way_tags(tags, &polygon, &roads))
return 0;
/* Split long ways after around 1 degree or 100km */
if (Options->projection == PROJ_LATLONG)
split_at = 1;
else
split_at = 100 * 1000;
wkt_size = get_wkt_split(nodes, count, polygon, split_at);
for (i=0;i<wkt_size;i++)
{
char *wkt = get_wkt(i);
if (wkt && strlen(wkt)) {
/* FIXME: there should be a better way to detect polygons */
if (!strncmp(wkt, "POLYGON", strlen("POLYGON")) || !strncmp(wkt, "MULTIPOLYGON", strlen("MULTIPOLYGON"))) {
expire_tiles_from_nodes_poly(nodes, count, id);
area = get_area(i);
if ((area > 0.0) && enable_way_area) {
char tmp[32];
snprintf(tmp, sizeof(tmp), "%g", area);
addItem(tags, "way_area", tmp, 0);
}
write_wkts(id, tags, wkt, t_poly);
} else {
expire_tiles_from_nodes_line(nodes, count);
write_wkts(id, tags, wkt, t_line);
if (roads)
write_wkts(id, tags, wkt, t_roads);
}
}
free(wkt);
}
clear_wkts();
return 0;
}
static int pgsql_out_relation(osmid_t id, struct keyval *rel_tags, int member_count, struct osmNode **xnodes, struct keyval *xtags, int *xcount, osmid_t *xid, const char **xrole)
{
int i, wkt_size;
int roads = 0;
int make_polygon = 0;
int make_boundary = 0;
int * members_superseeded;
double split_at;
members_superseeded = calloc(sizeof(int), member_count);
if (member_count == 0) {
free(members_superseeded);
return 0;
}
if (tagtransform_filter_rel_member_tags(rel_tags, member_count, xtags, xrole, members_superseeded, &make_boundary, &make_polygon, &roads)) {
free(members_superseeded);
return 0;
}
/* Split long linear ways after around 1 degree or 100km (polygons not effected) */
if (Options->projection == PROJ_LATLONG)
split_at = 1;
else
split_at = 100 * 1000;
wkt_size = build_geometry(id, xnodes, xcount, make_polygon, Options->enable_multi, split_at);
if (!wkt_size) {
free(members_superseeded);
return 0;
}
for (i=0;i<wkt_size;i++) {
char *wkt = get_wkt(i);
if (wkt && strlen(wkt)) {
expire_tiles_from_wkt(wkt, -id);
/* FIXME: there should be a better way to detect polygons */
if (!strncmp(wkt, "POLYGON", strlen("POLYGON")) || !strncmp(wkt, "MULTIPOLYGON", strlen("MULTIPOLYGON"))) {
double area = get_area(i);
if ((area > 0.0) && enable_way_area) {
char tmp[32];
snprintf(tmp, sizeof(tmp), "%g", area);
addItem(rel_tags, "way_area", tmp, 0);
}
write_wkts(-id, rel_tags, wkt, t_poly);
} else {
write_wkts(-id, rel_tags, wkt, t_line);
if (roads)
write_wkts(-id, rel_tags, wkt, t_roads);
}
}
free(wkt);
}
clear_wkts();
/* Tagtransform will have marked those member ways of the relation that
* have fully been dealt with as part of the multi-polygon entry.
* Set them in the database as done and delete their entry to not
* have duplicates */
if (make_polygon) {
for (i=0; xcount[i]; i++) {
if (members_superseeded[i]) {
Options->mid->ways_done(xid[i]);
pgsql_delete_way_from_output(xid[i]);
}
}
}
free(members_superseeded);
/* If we are making a boundary then also try adding any relations which form complete rings
The linear variants will have already been processed above */
if (make_boundary) {
wkt_size = build_geometry(id, xnodes, xcount, 1, Options->enable_multi, split_at);
for (i=0;i<wkt_size;i++)
{
char *wkt = get_wkt(i);
if (strlen(wkt)) {
expire_tiles_from_wkt(wkt, -id);
/* FIXME: there should be a better way to detect polygons */
if (!strncmp(wkt, "POLYGON", strlen("POLYGON")) || !strncmp(wkt, "MULTIPOLYGON", strlen("MULTIPOLYGON"))) {
double area = get_area(i);
if ((area > 0.0) && enable_way_area) {
char tmp[32];
snprintf(tmp, sizeof(tmp), "%g", area);
addItem(rel_tags, "way_area", tmp, 0);
}
write_wkts(-id, rel_tags, wkt, t_poly);
}
}
free(wkt);
}
clear_wkts();
}
return 0;
}
static int pgsql_out_connect(const struct output_options *options, int startTransaction) {
int i;
for (i=0; i<NUM_TABLES; i++) {
PGconn *sql_conn;
sql_conn = PQconnectdb(options->conninfo);
/* Check to see that the backend connection was successfully made */
if (PQstatus(sql_conn) != CONNECTION_OK) {
fprintf(stderr, "Connection to database failed: %s\n", PQerrorMessage(sql_conn));
return 1;
}
tables[i].sql_conn = sql_conn;
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "SET synchronous_commit TO off;");
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "PREPARE get_wkt (" POSTGRES_OSMID_TYPE ") AS SELECT ST_AsText(way) FROM %s WHERE osm_id = $1;\n", tables[i].name);
if (startTransaction)
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "BEGIN");
}
return 0;
}
static int pgsql_out_start(const struct output_options *options)
{
char *sql, tmp[256];
PGresult *res;
int i,j;
unsigned int sql_len;
int their_srid;
int i_hstore_column;
enum OsmType type;
int numTags;
struct taginfo *exportTags;
Options = options;
read_style_file( options->style );
sql_len = 2048;
sql = malloc(sql_len);
assert(sql);
for (i=0; i<NUM_TABLES; i++) {
PGconn *sql_conn;
/* Substitute prefix into name of table */
{
char *temp = malloc( strlen(options->prefix) + strlen(tables[i].name) + 1 );
sprintf( temp, tables[i].name, options->prefix );
tables[i].name = temp;
}
fprintf(stderr, "Setting up table: %s\n", tables[i].name);
sql_conn = PQconnectdb(options->conninfo);
/* Check to see that the backend connection was successfully made */
if (PQstatus(sql_conn) != CONNECTION_OK) {
fprintf(stderr, "Connection to database failed: %s\n", PQerrorMessage(sql_conn));
exit_nicely();
}
tables[i].sql_conn = sql_conn;
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "SET synchronous_commit TO off;");
if (!options->append) {
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "DROP TABLE IF EXISTS %s", tables[i].name);
}
else
{
sprintf(sql, "SELECT srid FROM geometry_columns WHERE f_table_name='%s';", tables[i].name);
res = PQexec(sql_conn, sql);
if (!((PQntuples(res) == 1) && (PQnfields(res) == 1)))
{
fprintf(stderr, "Problem reading geometry information for table %s - does it exist?\n", tables[i].name);
exit_nicely();
}
their_srid = atoi(PQgetvalue(res, 0, 0));
PQclear(res);
if (their_srid != SRID)
{
fprintf(stderr, "SRID mismatch: cannot append to table %s (SRID %d) using selected SRID %d\n", tables[i].name, their_srid, SRID);
exit_nicely();
}
}
/* These _tmp tables can be left behind if we run out of disk space */
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "DROP TABLE IF EXISTS %s_tmp", tables[i].name);
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "BEGIN");
type = (i == t_point)?OSMTYPE_NODE:OSMTYPE_WAY;
numTags = exportListCount[type];
exportTags = exportList[type];
if (!options->append) {
sprintf(sql, "CREATE TABLE %s ( osm_id " POSTGRES_OSMID_TYPE, tables[i].name );
for (j=0; j < numTags; j++) {
if( exportTags[j].flags & FLAG_DELETE )
continue;
if( (exportTags[j].flags & FLAG_PHSTORE ) == FLAG_PHSTORE)
continue;
sprintf(tmp, ",\"%s\" %s", exportTags[j].name, exportTags[j].type);
if (strlen(sql) + strlen(tmp) + 1 > sql_len) {
sql_len *= 2;
sql = realloc(sql, sql_len);
assert(sql);
}
strcat(sql, tmp);
}
for(i_hstore_column = 0; i_hstore_column < Options->n_hstore_columns; i_hstore_column++)
{
strcat(sql, ",\"");
strcat(sql, Options->hstore_columns[i_hstore_column]);
strcat(sql, "\" hstore ");
}
if (Options->enable_hstore) {
strcat(sql, ",tags hstore");
}
strcat(sql, ")");
if (Options->tblsmain_data) {
sprintf(sql + strlen(sql), " TABLESPACE %s", Options->tblsmain_data);
}
strcat(sql, "\n");
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "%s", sql);
pgsql_exec(sql_conn, PGRES_TUPLES_OK, "SELECT AddGeometryColumn('%s', 'way', %d, '%s', 2 );\n",
tables[i].name, SRID, tables[i].type );
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "ALTER TABLE %s ALTER COLUMN way SET NOT NULL;\n", tables[i].name);
/* slim mode needs this to be able to apply diffs */
if (Options->slim && !Options->droptemp) {
sprintf(sql, "CREATE INDEX %s_pkey ON %s USING BTREE (osm_id)", tables[i].name, tables[i].name);
if (Options->tblsmain_index) {
sprintf(sql + strlen(sql), " TABLESPACE %s\n", Options->tblsmain_index);
}
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "%s", sql);
}
} else {
/* Add any new columns referenced in the default.style */
PGresult *res;
sprintf(sql, "SELECT * FROM %s LIMIT 0;\n", tables[i].name);
res = PQexec(sql_conn, sql);
if (PQresultStatus(res) != PGRES_TUPLES_OK) {
fprintf(stderr, "Error, failed to query table %s\n%s\n", tables[i].name, sql);
exit_nicely();
}
for (j=0; j < numTags; j++) {
if( exportTags[j].flags & FLAG_DELETE )
continue;
if( (exportTags[j].flags & FLAG_PHSTORE) == FLAG_PHSTORE)
continue;
sprintf(tmp, "\"%s\"", exportTags[j].name);
if (PQfnumber(res, tmp) < 0) {
#if 0
fprintf(stderr, "Append failed. Column \"%s\" is missing from \"%s\"\n", exportTags[j].name, tables[i].name);
exit_nicely();
#else
fprintf(stderr, "Adding new column \"%s\" to \"%s\"\n", exportTags[j].name, tables[i].name);
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "ALTER TABLE %s ADD COLUMN \"%s\" %s;\n", tables[i].name, exportTags[j].name, exportTags[j].type);
#endif
}
/* Note: we do not verify the type or delete unused columns */
}
PQclear(res);
/* change the type of the geometry column if needed - this can only change to a more permisive type */
}
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "PREPARE get_wkt (" POSTGRES_OSMID_TYPE ") AS SELECT ST_AsText(way) FROM %s WHERE osm_id = $1;\n", tables[i].name);
/* Generate column list for COPY */
strcpy(sql, "osm_id");
for (j=0; j < numTags; j++) {
if( exportTags[j].flags & FLAG_DELETE )
continue;
if( (exportTags[j].flags & FLAG_PHSTORE ) == FLAG_PHSTORE)
continue;
sprintf(tmp, ",\"%s\"", exportTags[j].name);
if (strlen(sql) + strlen(tmp) + 1 > sql_len) {
sql_len *= 2;
sql = realloc(sql, sql_len);
assert(sql);
}
strcat(sql, tmp);
}
for(i_hstore_column = 0; i_hstore_column < Options->n_hstore_columns; i_hstore_column++)
{
strcat(sql, ",\"");
strcat(sql, Options->hstore_columns[i_hstore_column]);
strcat(sql, "\" ");
}
if (Options->enable_hstore) strcat(sql,",tags");
tables[i].columns = strdup(sql);
pgsql_exec(sql_conn, PGRES_COPY_IN, "COPY %s (%s,way) FROM STDIN", tables[i].name, tables[i].columns);
tables[i].copyMode = 1;
}
free(sql);
if (tagtransform_init(options)) {
fprintf(stderr, "Error: Failed to initialise tag processing.\n");
exit_nicely();
}
expire_tiles_init(options);
options->mid->start(options);