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middle-pgsql.cpp
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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"
#ifdef _WIN32
using namespace std;
#endif
#ifdef _MSC_VER
#define alloca _alloca
#endif
#include <stdexcept>
#include <unordered_map>
#include <cassert>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <future>
#include <boost/format.hpp>
#include <osmium/memory/buffer.hpp>
#include <osmium/builder/osm_object_builder.hpp>
#include <libpq-fe.h>
#include "middle-pgsql.hpp"
#include "node-persistent-cache.hpp"
#include "node-ram-cache.hpp"
#include "options.hpp"
#include "osmtypes.hpp"
#include "output-pgsql.hpp"
#include "pgsql.hpp"
#include "util.hpp"
enum table_id {
t_node, t_way, t_rel
} ;
middle_pgsql_t::table_desc::table_desc(const char *name_,
const char *start_,
const char *create_,
const char *create_index_,
const char *prepare_,
const char *prepare_intarray_,
const char *copy_,
const char *analyze_,
const char *stop_,
const char *array_indexes_)
: name(name_),
start(start_),
create(create_),
create_index(create_index_),
prepare(prepare_),
prepare_intarray(prepare_intarray_),
copy(copy_),
analyze(analyze_),
stop(stop_),
array_indexes(array_indexes_),
copyMode(0),
transactionMode(0),
sql_conn(nullptr)
{}
namespace {
// Decodes a portion of an array literal from postgres */
// Argument should point to beginning of literal, on return points to delimiter */
inline const char *decode_upto( const char *src, char *dst )
{
int quoted = (*src == '"');
if( quoted ) src++;
while( quoted ? (*src != '"') : (*src != ',' && *src != '}') )
{
if( *src == '\\' )
{
switch( src[1] )
{
case 'n': *dst++ = '\n'; break;
case 't': *dst++ = '\t'; break;
default: *dst++ = src[1]; break;
}
src+=2;
}
else
*dst++ = *src++;
}
if( quoted ) src++;
*dst = 0;
return src;
}
template <typename T>
void pgsql_parse_tags(const char *string, osmium::memory::Buffer &buffer, T &obuilder)
{
if( *string++ != '{' )
return;
char key[1024];
char val[1024];
osmium::builder::TagListBuilder builder(buffer, &obuilder);
while( *string != '}' ) {
string = decode_upto(string, key);
// String points to the comma */
string++;
string = decode_upto(string, val);
builder.add_tag(key, val);
// String points to the comma or closing '}' */
if( *string == ',' ) {
string++;
}
}
}
void pgsql_parse_members(const char *string, osmium::memory::Buffer &buffer,
osmium::builder::RelationBuilder &obuilder)
{
if( *string++ != '{' )
return;
char role[1024];
osmium::builder::RelationMemberListBuilder builder(buffer, &obuilder);
while( *string != '}' ) {
char type = string[0];
char *endp;
osmid_t id = strtoosmid(string + 1, &endp, 10);
// String points to the comma */
string = decode_upto(endp + 1, role);
builder.add_member(osmium::char_to_item_type(type), id, role);
// String points to the comma or closing '}' */
if( *string == ',' ) {
string++;
}
}
}
void pgsql_parse_nodes(const char *string, osmium::memory::Buffer &buffer,
osmium::builder::WayBuilder &builder)
{
if (*string++ == '{') {
osmium::builder::WayNodeListBuilder wnl_builder(buffer, &builder);
while (*string != '}') {
char *ptr;
wnl_builder.add_node_ref(strtoosmid(string, &ptr, 10));
string = ptr;
if (*string == ',') {
string++;
}
}
}
}
int pgsql_endCopy(middle_pgsql_t::table_desc *table)
{
// Terminate any pending COPY */
if (table->copyMode) {
PGconn *sql_conn = table->sql_conn;
int stop = PQputCopyEnd(sql_conn, nullptr);
if (stop != 1) {
fprintf(stderr, "COPY_END for %s failed: %s\n", table->copy, PQerrorMessage(sql_conn));
util::exit_nicely();
}
pg_result_t res(PQgetResult(sql_conn));
if (PQresultStatus(res.get()) != PGRES_COMMAND_OK) {
fprintf(stderr, "COPY_END for %s failed: %s\n", table->copy, PQerrorMessage(sql_conn));
util::exit_nicely();
}
table->copyMode = 0;
}
return 0;
}
} // anonymous namespace
void middle_pgsql_t::buffer_store_string(std::string const &in, bool escape)
{
for (char const c: in) {
switch (c) {
case '"':
if (escape) copy_buffer += "\\";
copy_buffer += "\\\"";
break;
case '\\':
if (escape) copy_buffer += "\\\\";
copy_buffer += "\\\\";
break;
case '\n':
if (escape) copy_buffer += "\\";
copy_buffer += "\\n";
break;
case '\r':
if (escape) copy_buffer += "\\";
copy_buffer += "\\r";
break;
case '\t':
if (escape) copy_buffer += "\\";
copy_buffer += "\\t";
break;
default:
copy_buffer += c;
break;
}
}
}
// escape means we return '\N' for copy mode, otherwise we return just nullptr
void middle_pgsql_t::buffer_store_tags(osmium::OSMObject const &obj, bool attrs,
bool escape)
{
copy_buffer += "{";
for (auto const &it : obj.tags()) {
copy_buffer += "\"";
buffer_store_string(it.key(), escape);
copy_buffer += "\",\"";
buffer_store_string(it.value(), escape);
copy_buffer += "\",";
}
if (attrs) {
taglist_t extra;
extra.add_attributes(obj);
for (auto const &it : extra) {
copy_buffer += "\"";
copy_buffer += it.key;
copy_buffer += "\",\"";
buffer_store_string(it.value.c_str(), escape);
copy_buffer += "\",";
}
}
copy_buffer[copy_buffer.size() - 1] = '}';
}
void middle_pgsql_t::buffer_correct_params(char const **param, size_t size)
{
if (copy_buffer.c_str() != param[0]) {
auto diff = copy_buffer.c_str() - param[0];
for (size_t i = 0; i < size; ++i) {
if (param[i]) {
param[i] += diff;
}
}
}
}
void middle_pgsql_t::local_nodes_set(osmium::Node const &node)
{
copy_buffer.reserve(node.tags().byte_size() + 100);
bool copy = node_table->copyMode;
char delim = copy ? '\t' : '\0';
const char *paramValues[4] = {
copy_buffer.c_str(),
};
copy_buffer = std::to_string(node.id());
copy_buffer += delim;
paramValues[1] = paramValues[0] + copy_buffer.size();
copy_buffer += std::to_string(node.location().y());
copy_buffer += delim;
paramValues[2] = paramValues[0] + copy_buffer.size();
copy_buffer += std::to_string(node.location().x());
if (copy) {
copy_buffer += '\n';
pgsql_CopyData(__FUNCTION__, node_table->sql_conn, copy_buffer);
} else {
buffer_correct_params(paramValues, 4);
pgsql_execPrepared(node_table->sql_conn, "insert_node", 3,
(const char *const *)paramValues, PGRES_COMMAND_OK);
}
}
size_t middle_pgsql_t::local_nodes_get_list(osmium::WayNodeList *nodes) const
{
size_t count = 0;
std::string buffer("{");
// get nodes where possible from cache,
// at the same time build a list for querying missing nodes from DB
size_t pos = 0;
for (auto &n : *nodes) {
auto loc = cache->get(n.ref());
if (loc.valid()) {
n.set_location(loc);
++count;
} else {
buffer += std::to_string(n.ref());
buffer += ',';
}
++pos;
}
if (count == pos) {
return count; // all ids found in cache, nothing more to do
}
// get any remaining nodes from the DB
buffer[buffer.size() - 1] = '}';
pgsql_endCopy(node_table);
PGconn *sql_conn = node_table->sql_conn;
char const *paramValues[1];
paramValues[0] = buffer.c_str();
auto res = pgsql_execPrepared(sql_conn, "get_node_list", 1, paramValues,
PGRES_TUPLES_OK);
auto countPG = PQntuples(res.get());
std::unordered_map<osmid_t, osmium::Location> locs;
for (int i = 0; i < countPG; ++i) {
locs.emplace(
strtoosmid(PQgetvalue(res.get(), i, 0), nullptr, 10),
osmium::Location(
(int)strtol(PQgetvalue(res.get(), i, 2), nullptr, 10),
(int)strtol(PQgetvalue(res.get(), i, 1), nullptr, 10)));
}
for (auto &n : *nodes) {
auto el = locs.find(n.ref());
if (el != locs.end()) {
n.set_location(el->second);
++count;
}
}
return count;
}
void middle_pgsql_t::nodes_set(osmium::Node const &node)
{
cache->set(node.id(), node.location());
if (out_options->flat_node_cache_enabled) {
persistent_cache->set(node.id(), node.location());
} else {
local_nodes_set(node);
}
}
size_t middle_pgsql_t::nodes_get_list(osmium::WayNodeList *nodes) const
{
return (out_options->flat_node_cache_enabled)
? persistent_cache->get_list(nodes)
: local_nodes_get_list(nodes);
}
void middle_pgsql_t::local_nodes_delete(osmid_t osm_id)
{
char const *paramValues[1];
char buffer[64];
// Make sure we're out of copy mode */
pgsql_endCopy( node_table );
sprintf( buffer, "%" PRIdOSMID, osm_id );
paramValues[0] = buffer;
pgsql_execPrepared(node_table->sql_conn, "delete_node", 1, paramValues, PGRES_COMMAND_OK );
}
void middle_pgsql_t::nodes_delete(osmid_t osm_id)
{
if (out_options->flat_node_cache_enabled) {
persistent_cache->set(osm_id, osmium::Location());
} else {
local_nodes_delete(osm_id);
}
}
void middle_pgsql_t::node_changed(osmid_t osm_id)
{
if (!mark_pending) {
return;
}
char const *paramValues[1];
char buffer[64];
// Make sure we're out of copy mode */
pgsql_endCopy( way_table );
pgsql_endCopy( rel_table );
sprintf( buffer, "%" PRIdOSMID, osm_id );
paramValues[0] = buffer;
//keep track of whatever ways and rels these nodes intersect
//TODO: dont need to stop the copy above since we are only reading?
auto res = pgsql_execPrepared(way_table->sql_conn, "mark_ways_by_node", 1,
paramValues, PGRES_TUPLES_OK);
for (int i = 0; i < PQntuples(res.get()); ++i) {
char *end;
osmid_t marked = strtoosmid(PQgetvalue(res.get(), i, 0), &end, 10);
ways_pending_tracker->mark(marked);
}
//do the rels too
res = pgsql_execPrepared(rel_table->sql_conn, "mark_rels_by_node", 1, paramValues, PGRES_TUPLES_OK );
for (int i = 0; i < PQntuples(res.get()); ++i) {
char *end;
osmid_t marked = strtoosmid(PQgetvalue(res.get(), i, 0), &end, 10);
rels_pending_tracker->mark(marked);
}
}
void middle_pgsql_t::ways_set(osmium::Way const &way)
{
copy_buffer.reserve(way.nodes().size() * 10 + way.tags().byte_size() + 100);
bool copy = way_table->copyMode;
char delim = copy ? '\t' : '\0';
// Three params: id, nodes, tags */
const char *paramValues[4] = { copy_buffer.c_str(), };
copy_buffer = std::to_string(way.id());
copy_buffer += delim;
paramValues[1] = paramValues[0] + copy_buffer.size();
if (way.nodes().size() == 0) {
copy_buffer += "{}";
} else {
copy_buffer += "{";
for (auto const &n : way.nodes()) {
copy_buffer += std::to_string(n.ref());
copy_buffer += ',';
}
copy_buffer[copy_buffer.size() - 1] = '}';
}
copy_buffer += delim;
if (way.tags().empty() && !out_options->extra_attributes) {
paramValues[2] = nullptr;
copy_buffer += "\\N";
} else {
paramValues[2] = paramValues[0] + copy_buffer.size();
buffer_store_tags(way, out_options->extra_attributes, copy);
}
if (copy) {
copy_buffer += '\n';
pgsql_CopyData(__FUNCTION__, way_table->sql_conn, copy_buffer);
} else {
buffer_correct_params(paramValues, 3);
pgsql_execPrepared(way_table->sql_conn, "insert_way", 3,
(const char * const *)paramValues, PGRES_COMMAND_OK);
}
}
bool middle_pgsql_t::ways_get(osmid_t id, osmium::memory::Buffer &buffer) const
{
char const *paramValues[1];
PGconn *sql_conn = way_table->sql_conn;
// Make sure we're out of copy mode */
pgsql_endCopy(way_table);
char tmp[16];
snprintf(tmp, sizeof(tmp), "%" PRIdOSMID, id);
paramValues[0] = tmp;
auto res = pgsql_execPrepared(sql_conn, "get_way", 1, paramValues,
PGRES_TUPLES_OK);
if (PQntuples(res.get()) != 1) {
return false;
}
{
osmium::builder::WayBuilder builder(buffer);
builder.set_id(id);
pgsql_parse_nodes(PQgetvalue(res.get(), 0, 0), buffer, builder);
pgsql_parse_tags(PQgetvalue(res.get(), 0, 1), buffer, builder);
}
buffer.commit();
return true;
}
size_t middle_pgsql_t::rel_way_members_get(osmium::Relation const &rel,
rolelist_t *roles,
osmium::memory::Buffer &buffer) const
{
char tmp[16];
char const *paramValues[1];
// create a list of ids in tmp2 to query the database
std::string tmp2("{");
for (auto const &m : rel.members()) {
if (m.type() == osmium::item_type::way) {
snprintf(tmp, sizeof(tmp), "%" PRIdOSMID ",", m.ref());
tmp2.append(tmp);
}
}
if (tmp2.length() == 1) {
return 0; // no ways found
}
// replace last , with } to complete list of ids
tmp2[tmp2.length() - 1] = '}';
pgsql_endCopy(way_table);
PGconn *sql_conn = way_table->sql_conn;
paramValues[0] = tmp2.c_str();
auto res = pgsql_execPrepared(sql_conn, "get_way_list", 1, paramValues,
PGRES_TUPLES_OK);
int countPG = PQntuples(res.get());
idlist_t wayidspg;
for (int i = 0; i < countPG; i++) {
wayidspg.push_back(
strtoosmid(PQgetvalue(res.get(), i, 0), nullptr, 10));
}
// Match the list of ways coming from postgres in a different order
// back to the list of ways given by the caller */
size_t outres = 0;
for (auto const &m : rel.members()) {
if (m.type() != osmium::item_type::way) {
continue;
}
for (int j = 0; j < countPG; j++) {
if (m.ref() == wayidspg[j]) {
{
osmium::builder::WayBuilder builder(buffer);
builder.set_id(m.ref());
pgsql_parse_nodes(PQgetvalue(res.get(), j, 1), buffer,
builder);
pgsql_parse_tags(PQgetvalue(res.get(), j, 2), buffer,
builder);
}
buffer.commit();
if (roles) {
roles->emplace_back(m.role());
}
outres++;
break;
}
}
}
return outres;
}
void middle_pgsql_t::ways_delete(osmid_t osm_id)
{
char const *paramValues[1];
char buffer[64];
// Make sure we're out of copy mode */
pgsql_endCopy( way_table );
sprintf( buffer, "%" PRIdOSMID, osm_id );
paramValues[0] = buffer;
pgsql_execPrepared(way_table->sql_conn, "delete_way", 1, paramValues, PGRES_COMMAND_OK );
}
void middle_pgsql_t::iterate_ways(middle_t::pending_processor& pf)
{
// Make sure we're out of copy mode */
pgsql_endCopy( way_table );
// enqueue the jobs
osmid_t id;
while(id_tracker::is_valid(id = ways_pending_tracker->pop_mark()))
{
pf.enqueue_ways(id);
}
// in case we had higher ones than the middle
pf.enqueue_ways(id_tracker::max());
//let the threads work on them
pf.process_ways();
}
void middle_pgsql_t::way_changed(osmid_t osm_id)
{
char const *paramValues[1];
char buffer[64];
// Make sure we're out of copy mode */
pgsql_endCopy( rel_table );
sprintf( buffer, "%" PRIdOSMID, osm_id );
paramValues[0] = buffer;
//keep track of whatever rels this way intersects
//TODO: dont need to stop the copy above since we are only reading?
auto res = pgsql_execPrepared(rel_table->sql_conn, "mark_rels_by_way", 1,
paramValues, PGRES_TUPLES_OK);
for (int i = 0; i < PQntuples(res.get()); ++i) {
char *end;
osmid_t marked = strtoosmid(PQgetvalue(res.get(), i, 0), &end, 10);
rels_pending_tracker->mark(marked);
}
}
void middle_pgsql_t::relations_set(osmium::Relation const &rel)
{
idlist_t parts[3];
for (auto const &m : rel.members()) {
parts[osmium::item_type_to_nwr_index(m.type())].push_back(m.ref());
}
copy_buffer.reserve(rel.members().byte_size() * 2 + rel.tags().byte_size() + 128);
// Params: id, way_off, rel_off, parts, members, tags */
const char *paramValues[6] = { copy_buffer.c_str(), };
bool copy = rel_table->copyMode;
char delim = copy ? '\t' : '\0';
copy_buffer = std::to_string(rel.id());
copy_buffer+= delim;
paramValues[1] = paramValues[0] + copy_buffer.size();
copy_buffer += std::to_string(parts[0].size());
copy_buffer+= delim;
paramValues[2] = paramValues[0] + copy_buffer.size();
copy_buffer += std::to_string(parts[0].size() + parts[1].size());
copy_buffer+= delim;
paramValues[3] = paramValues[0] + copy_buffer.size();
if (rel.members().empty()) {
copy_buffer += "{}";
} else {
copy_buffer += "{";
for (int i = 0; i < 3; ++i) {
for (auto it : parts[i]) {
copy_buffer += std::to_string(it);
copy_buffer += ',';
}
}
copy_buffer[copy_buffer.size() - 1] = '}';
}
copy_buffer+= delim;
if (rel.members().empty()) {
paramValues[4] = nullptr;
copy_buffer += "\\N";
} else {
paramValues[4] = paramValues[0] + copy_buffer.size();
copy_buffer += "{";
for (auto const &m : rel.members()) {
copy_buffer += '"';
copy_buffer += osmium::item_type_to_char(m.type());
copy_buffer += std::to_string(m.ref());
copy_buffer += "\",\"";
buffer_store_string(m.role(), copy);
copy_buffer += "\",";
}
copy_buffer[copy_buffer.size() - 1] = '}';
}
copy_buffer+= delim;
if (rel.tags().empty() && !out_options->extra_attributes) {
paramValues[5] = nullptr;
copy_buffer += "\\N";
} else {
paramValues[5] = paramValues[0] + copy_buffer.size();
buffer_store_tags(rel, out_options->extra_attributes, copy);
}
if (copy) {
copy_buffer+= '\n';
pgsql_CopyData(__FUNCTION__, rel_table->sql_conn, copy_buffer);
} else {
buffer_correct_params(paramValues, 6);
pgsql_execPrepared(rel_table->sql_conn, "insert_rel", 6,
(const char * const *)paramValues, PGRES_COMMAND_OK);
}
}
bool middle_pgsql_t::relations_get(osmid_t id, osmium::memory::Buffer &buffer) const
{
char tmp[16];
char const *paramValues[1];
PGconn *sql_conn = rel_table->sql_conn;
taglist_t member_temp;
// Make sure we're out of copy mode */
pgsql_endCopy(rel_table);
snprintf(tmp, sizeof(tmp), "%" PRIdOSMID, id);
paramValues[0] = tmp;
auto res = pgsql_execPrepared(sql_conn, "get_rel", 1, paramValues,
PGRES_TUPLES_OK);
// Fields are: members, tags, member_count */
if (PQntuples(res.get()) != 1) {
return false;
}
{
osmium::builder::RelationBuilder builder(buffer);
builder.set_id(id);
pgsql_parse_members(PQgetvalue(res.get(), 0, 0), buffer, builder);
pgsql_parse_tags(PQgetvalue(res.get(), 0, 1), buffer, builder);
}
buffer.commit();
return true;
}
void middle_pgsql_t::relations_delete(osmid_t osm_id)
{
char const *paramValues[1];
char buffer[64];
// Make sure we're out of copy mode */
pgsql_endCopy( way_table );
pgsql_endCopy( rel_table );
sprintf( buffer, "%" PRIdOSMID, osm_id );
paramValues[0] = buffer;
pgsql_execPrepared(rel_table->sql_conn, "delete_rel", 1, paramValues, PGRES_COMMAND_OK );
//keep track of whatever ways this relation interesects
//TODO: dont need to stop the copy above since we are only reading?
auto res = pgsql_execPrepared(way_table->sql_conn, "mark_ways_by_rel", 1,
paramValues, PGRES_TUPLES_OK);
for (int i = 0; i < PQntuples(res.get()); ++i) {
char *end;
osmid_t marked = strtoosmid(PQgetvalue(res.get(), i, 0), &end, 10);
ways_pending_tracker->mark(marked);
}
}
void middle_pgsql_t::iterate_relations(pending_processor& pf)
{
// Make sure we're out of copy mode */
pgsql_endCopy( rel_table );
// enqueue the jobs
osmid_t id;
while(id_tracker::is_valid(id = rels_pending_tracker->pop_mark()))
{
pf.enqueue_relations(id);
}
// in case we had higher ones than the middle
pf.enqueue_relations(id_tracker::max());
//let the threads work on them
pf.process_relations();
}
void middle_pgsql_t::relation_changed(osmid_t osm_id)
{
char const *paramValues[1];
char buffer[64];
// Make sure we're out of copy mode */
pgsql_endCopy( rel_table );
sprintf( buffer, "%" PRIdOSMID, osm_id );
paramValues[0] = buffer;
//keep track of whatever ways and rels these nodes intersect
//TODO: dont need to stop the copy above since we are only reading?
//TODO: can we just mark the id without querying? the where clause seems intersect reltable.parts with the id
auto res = pgsql_execPrepared(rel_table->sql_conn, "mark_rels", 1,
paramValues, PGRES_TUPLES_OK);
for (int i = 0; i < PQntuples(res.get()); ++i) {
char *end;
osmid_t marked = strtoosmid(PQgetvalue(res.get(), i, 0), &end, 10);
rels_pending_tracker->mark(marked);
}
}
idlist_t middle_pgsql_t::relations_using_way(osmid_t way_id) const
{
char const *paramValues[1];
char buffer[64];
// Make sure we're out of copy mode */
pgsql_endCopy( rel_table );
sprintf(buffer, "%" PRIdOSMID, way_id);
paramValues[0] = buffer;
auto result = pgsql_execPrepared(rel_table->sql_conn, "rels_using_way", 1,
paramValues, PGRES_TUPLES_OK);
const int ntuples = PQntuples(result.get());
idlist_t rel_ids;
rel_ids.resize((size_t) ntuples);
for (int i = 0; i < ntuples; ++i) {
rel_ids[i] = strtoosmid(PQgetvalue(result.get(), i, 0), nullptr, 10);
}
return rel_ids;
}
void middle_pgsql_t::analyze(void)
{
for (auto& table: tables) {
PGconn *sql_conn = table.sql_conn;
if (table.analyze) {
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "%s", table.analyze);
}
}
}
void middle_pgsql_t::end(void)
{
for (auto& table: tables) {
PGconn *sql_conn = table.sql_conn;
// Commit transaction */
if (table.stop && table.transactionMode) {
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "%s", table.stop);
table.transactionMode = 0;
}
}
}
/**
* Helper to create SQL queries.
*
* The input string is mangled as follows:
* %p replaced by the content of the "prefix" option
* %i replaced by the content of the "tblsslim_data" option
* %t replaced by the content of the "tblssslim_index" option
* %m replaced by "UNLOGGED" if the "unlogged" option is set
* other occurrences of the "%" char are treated normally.
* any occurrence of { or } will be ignored (not copied to output string);
* anything inside {} is only copied if it contained at least one of
* %p, %i, %t, %m that was not NULL.
*
* So, the input string
* Hello{ dear %i}!
* will, if i is set to "John", translate to
* Hello dear John!
* but if i is unset, translate to
* Hello!
*
* This is used for constructing SQL queries with proper tablespace settings.
*/
static void set_prefix_and_tbls(const struct options_t *options, const char **string)
{
char buffer[1024];
const char *source;
char *dest;
char *openbrace = nullptr;
int copied = 0;
if (*string == nullptr) {
return;
}
source = *string;
dest = buffer;
while (*source) {
if (*source == '{') {
openbrace = dest;
copied = 0;
source++;
continue;
} else if (*source == '}') {
if (!copied && openbrace) dest = openbrace;
source++;
continue;
} else if (*source == '%') {
if (*(source+1) == 'p') {
if (!options->prefix.empty()) {
strcpy(dest, options->prefix.c_str());
dest += strlen(options->prefix.c_str());
copied = 1;
}
source+=2;
continue;
} else if (*(source+1) == 't') {
if (options->tblsslim_data) {
strcpy(dest, options->tblsslim_data->c_str());
dest += strlen(options->tblsslim_data->c_str());
copied = 1;
}
source+=2;
continue;
} else if (*(source+1) == 'i') {
if (options->tblsslim_index) {
strcpy(dest, options->tblsslim_index->c_str());
dest += strlen(options->tblsslim_index->c_str());
copied = 1;
}
source+=2;
continue;
} else if (*(source+1) == 'm') {
if (options->unlogged) {
strcpy(dest, "UNLOGGED");
dest += 8;
copied = 1;
}
source+=2;
continue;
}
}
*(dest++) = *(source++);
}
*dest = 0;
*string = strdup(buffer);
}
void middle_pgsql_t::connect(table_desc& table) {
PGconn *sql_conn;
set_prefix_and_tbls(out_options, &(table.name));
set_prefix_and_tbls(out_options, &(table.start));
set_prefix_and_tbls(out_options, &(table.create));
set_prefix_and_tbls(out_options, &(table.create_index));
set_prefix_and_tbls(out_options, &(table.prepare));
set_prefix_and_tbls(out_options, &(table.prepare_intarray));
set_prefix_and_tbls(out_options, &(table.copy));
set_prefix_and_tbls(out_options, &(table.analyze));
set_prefix_and_tbls(out_options, &(table.stop));
set_prefix_and_tbls(out_options, &(table.array_indexes));
fprintf(stderr, "Setting up table: %s\n", table.name);
sql_conn = PQconnectdb(out_options->database_options.conninfo().c_str());
// Check to see that the backend connection was successfully made, and if not, exit */
if (PQstatus(sql_conn) != CONNECTION_OK) {
fprintf(stderr, "Connection to database failed: %s\n", PQerrorMessage(sql_conn));
util::exit_nicely();
}
table.sql_conn = sql_conn;
}
void middle_pgsql_t::start(const options_t *out_options_)
{
out_options = out_options_;
bool dropcreate = !out_options->append; ///< If tables need to be dropped and created anew
ways_pending_tracker.reset(new id_tracker());
rels_pending_tracker.reset(new id_tracker());
// Gazetter doesn't use mark-pending processing and consequently
// needs no way-node index.
// TODO Currently, set here to keep the impact on the code small.
// We actually should have the output plugins report their needs
// and pass that via the constructor to middle_t, so that middle_t
// itself doesn't need to know about details of the output.
if (out_options->output_backend == "gazetteer") {
way_table->array_indexes = nullptr;
mark_pending = false;
}
append = out_options->append;
// reset this on every start to avoid options from last run
// staying set for the second.
build_indexes = !append && !out_options->droptemp;
cache.reset(new node_ram_cache(out_options->alloc_chunkwise | ALLOC_LOSSY,
out_options->cache));
if (out_options->flat_node_cache_enabled) {
persistent_cache.reset(new node_persistent_cache(out_options, cache));
}
fprintf(stderr, "Mid: pgsql, cache=%d\n", out_options->cache);
// We use a connection per table to enable the use of COPY */
for (auto& table: tables) {
connect(table);
PGconn* sql_conn = table.sql_conn;
/*
* To allow for parallelisation, the second phase (iterate_ways), cannot be run
* in an extended transaction and each update statement is its own transaction.
* Therefore commit rate of postgresql is very important to ensure high speed.
* If fsync is enabled to ensure safe transactions, the commit rate can be very low.
* To compensate for this, one can set the postgresql parameter synchronous_commit
* to off. This means an update statement returns to the client as success before the
* transaction is saved to disk via fsync, which in return allows to bunch up multiple
* transactions into a single fsync. This may result in some data loss in the case of a
* database crash. However, as we don't currently have the ability to restart a full osm2pgsql
* import session anyway, this is fine. Diff imports are also not effected, as the next
* diff import would simply deal with all pending ways that were not previously finished.
* This parameter does not effect safety from data corruption on the back-end.
*/
pgsql_exec(sql_conn, PGRES_COMMAND_OK, "SET synchronous_commit TO off;");