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/**
* SPDX-License-Identifier: GPL-2.0-or-later
*
* This file is part of osm2pgsql (https://osm2pgsql.org/).
*
* Copyright (C) 2006-2021 by the osm2pgsql developer community.
* For a full list of authors see the git log.
*/
#include "flex-table.hpp"
#include "format.hpp"
#include "logging.hpp"
#include "pgsql-helper.hpp"
#include "util.hpp"
#include <cassert>
#include <string>
char const *type_to_char(osmium::item_type type) noexcept
{
switch (type) {
case osmium::item_type::node:
return "N";
case osmium::item_type::way:
return "W";
case osmium::item_type::relation:
return "R";
default:
break;
}
return "X";
}
bool flex_table_t::has_multicolumn_id_index() const noexcept
{
return m_columns[0].type() == table_column_type::id_type;
}
std::string flex_table_t::id_column_names() const
{
std::string name;
if (!has_id_column()) {
return name;
}
name = m_columns[0].name();
if (has_multicolumn_id_index()) {
name += ',';
name += m_columns[1].name();
}
return name;
}
std::string flex_table_t::full_name() const
{
return qualified_name(schema(), name());
}
std::string flex_table_t::full_tmp_name() const
{
return qualified_name(schema(), name() + "_tmp");
}
flex_table_column_t &flex_table_t::add_column(std::string const &name,
std::string const &type,
std::string const &sql_type)
{
// id_type (optional) and id_num must always be the first columns
assert(type != "id_type" || m_columns.empty());
assert(type != "id_num" || m_columns.empty() ||
(m_columns.size() == 1 &&
m_columns[0].type() == table_column_type::id_type));
m_columns.emplace_back(name, type, sql_type);
auto &column = m_columns.back();
if (column.is_geometry_column()) {
m_geom_column = m_columns.size() - 1;
column.set_not_null();
}
return column;
}
std::string flex_table_t::build_sql_prepare_get_wkb() const
{
if (has_multicolumn_id_index()) {
return "PREPARE get_wkb(char(1), bigint) AS"
" SELECT \"{}\" FROM {} WHERE \"{}\" = $1 AND \"{}\" = $2"_format(
geom_column().name(), full_name(), m_columns[0].name(),
m_columns[1].name());
}
return "PREPARE get_wkb(bigint) AS"
" SELECT \"{}\" FROM {} WHERE \"{}\" = $1"_format(
geom_column().name(), full_name(), id_column_names());
}
std::string
flex_table_t::build_sql_create_table(table_type ttype,
std::string const &table_name) const
{
assert(!m_columns.empty());
std::string sql = "CREATE {} TABLE IF NOT EXISTS {} ("_format(
ttype == table_type::interim ? "UNLOGGED" : "", table_name);
for (auto const &column : m_columns) {
// create_only columns are only created in permanent, not in the
// interim tables
if (ttype == table_type::permanent || !column.create_only()) {
sql += column.sql_create();
}
}
assert(sql.back() == ',');
sql.back() = ')';
if (ttype == table_type::interim) {
sql += " WITH (autovacuum_enabled = off)";
}
sql += tablespace_clause(m_data_tablespace);
return sql;
}
std::string flex_table_t::build_sql_column_list() const
{
assert(!m_columns.empty());
std::string result;
for (auto const &column : m_columns) {
if (!column.create_only()) {
result += '"';
result += column.name();
result += '"';
result += ',';
}
}
result.resize(result.size() - 1);
return result;
}
std::string flex_table_t::build_sql_create_id_index() const
{
return "CREATE INDEX ON {} USING BTREE ({}) {}"_format(
full_name(), id_column_names(), tablespace_clause(index_tablespace()));
}
void table_connection_t::connect(std::string const &conninfo)
{
assert(!m_db_connection);
m_db_connection = std::make_unique<pg_conn_t>(conninfo);
m_db_connection->exec("SET synchronous_commit = off");
}
void table_connection_t::start(bool append)
{
assert(m_db_connection);
m_db_connection->exec("SET client_min_messages = WARNING");
if (!append) {
m_db_connection->exec(
"DROP TABLE IF EXISTS {} CASCADE"_format(table().full_name()));
}
// These _tmp tables can be left behind if we run out of disk space.
m_db_connection->exec(
"DROP TABLE IF EXISTS {}"_format(table().full_tmp_name()));
m_db_connection->exec("RESET client_min_messages");
if (!append) {
m_db_connection->exec(table().build_sql_create_table(
table().cluster_by_geom() ? flex_table_t::table_type::interim
: flex_table_t::table_type::permanent,
table().full_name()));
if (table().has_geom_column() &&
table().geom_column().needs_isvalid()) {
create_geom_check_trigger(m_db_connection.get(), table().schema(),
table().name(),
table().geom_column().name());
}
}
prepare();
}
void table_connection_t::stop(bool updateable, bool append)
{
assert(m_db_connection);
m_copy_mgr.sync();
if (append) {
teardown();
return;
}
if (table().cluster_by_geom()) {
if (table().geom_column().needs_isvalid()) {
drop_geom_check_trigger(m_db_connection.get(), table().schema(),
table().name());
}
log_info("Clustering table '{}' by geometry...", table().name());
// Notices about invalid geometries are expected and can be ignored
// because they say nothing about the validity of the geometry in OSM.
m_db_connection->exec("SET client_min_messages = WARNING");
m_db_connection->exec(table().build_sql_create_table(
flex_table_t::table_type::permanent, table().full_tmp_name()));
std::string const columns = table().build_sql_column_list();
std::string sql = "INSERT INTO {} ({}) SELECT {} FROM {}"_format(
table().full_tmp_name(), columns, columns, table().full_name());
auto const postgis_version = get_postgis_version(*m_db_connection);
sql += " ORDER BY ";
if (postgis_version.major == 2 && postgis_version.minor < 4) {
log_debug("Using GeoHash for clustering table '{}'",
table().name());
if (table().geom_column().srid() == 4326) {
sql += "ST_GeoHash({},10)"_format(table().geom_column().name());
} else {
sql +=
"ST_GeoHash(ST_Transform(ST_Envelope({}),4326),10)"_format(
table().geom_column().name());
}
sql += " COLLATE \"C\"";
} else {
log_debug("Using native order for clustering table '{}'",
table().name());
// Since Postgis 2.4 the order function for geometries gives
// useful results.
sql += table().geom_column().name();
}
m_db_connection->exec(sql);
m_db_connection->exec("DROP TABLE {}"_format(table().full_name()));
m_db_connection->exec("ALTER TABLE {} RENAME TO \"{}\""_format(
table().full_tmp_name(), table().name()));
m_id_index_created = false;
if (updateable && table().geom_column().needs_isvalid()) {
create_geom_check_trigger(m_db_connection.get(), table().schema(),
table().name(),
table().geom_column().name());
}
}
if (table().has_geom_column()) {
log_info("Creating geometry index on table '{}'...", table().name());
// Use fillfactor 100 for un-updateable imports
m_db_connection->exec(
"CREATE INDEX ON {} USING GIST (\"{}\") {} {}"_format(
table().full_name(), table().geom_column().name(),
(updateable ? "" : "WITH (fillfactor = 100)"),
tablespace_clause(table().index_tablespace())));
}
if (updateable && table().has_id_column()) {
create_id_index();
}
log_info("Analyzing table '{}'...", table().name());
analyze_table(*m_db_connection, table().schema(), table().name());
teardown();
}
void table_connection_t::prepare()
{
assert(m_db_connection);
if (table().has_id_column() && table().has_geom_column()) {
m_db_connection->exec(table().build_sql_prepare_get_wkb());
}
}
void table_connection_t::create_id_index()
{
if (m_id_index_created) {
log_debug("Id index on table '{}' already created.", table().name());
} else {
log_info("Creating id index on table '{}'...", table().name());
m_db_connection->exec(table().build_sql_create_id_index());
m_id_index_created = true;
}
}
pg_result_t table_connection_t::get_geom_by_id(osmium::item_type type,
osmid_t id) const
{
assert(table().has_geom_column());
assert(m_db_connection);
std::string const id_str = fmt::to_string(id);
if (table().has_multicolumn_id_index()) {
return m_db_connection->exec_prepared(
"get_wkb", type_to_char(type), id_str.c_str());
}
return m_db_connection->exec_prepared("get_wkb", id_str);
}
void table_connection_t::delete_rows_with(osmium::item_type type, osmid_t id)
{
m_copy_mgr.new_line(m_target);
if (!table().has_multicolumn_id_index()) {
type = osmium::item_type::undefined;
}
m_copy_mgr.delete_object(type_to_char(type)[0], id);
}
void table_connection_t::task_wait()
{
auto const run_time = m_task_result.wait();
log_info("All postprocessing on table '{}' done in {}.", table().name(),
util::human_readable_duration(run_time));
}