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#include <TableFunctions/TableFunctionPostgreSQL.h>
#if USE_LIBPQXX
#include <Interpreters/evaluateConstantExpression.h>
#include <Parsers/ASTFunction.h>
#include <TableFunctions/ITableFunction.h>
#include <TableFunctions/TableFunctionFactory.h>
#include <Common/Exception.h>
#include "registerTableFunctions.h"
#include <Common/parseRemoteDescription.h>
namespace DB
{
namespace ErrorCodes
{
extern const int BAD_ARGUMENTS;
}
StoragePtr TableFunctionPostgreSQL::executeImpl(const ASTPtr & /*ast_function*/,
ContextPtr context, const std::string & table_name, ColumnsDescription cached_columns, bool /*is_insert_query*/) const
{
auto result = std::make_shared<StoragePostgreSQL>(
StorageID(getDatabaseName(), table_name),
connection_pool,
configuration->table,
cached_columns,
ConstraintsDescription{},
String{},
context,
configuration->schema,
configuration->on_conflict);
result->startup();
return result;
}
ColumnsDescription TableFunctionPostgreSQL::getActualTableStructure(ContextPtr context, bool /*is_insert_query*/) const
{
return StoragePostgreSQL::getTableStructureFromData(connection_pool, configuration->table, configuration->schema, context);
}
void TableFunctionPostgreSQL::parseArguments(const ASTPtr & ast_function, ContextPtr context)
{
const auto & func_args = ast_function->as<ASTFunction &>();
if (!func_args.arguments)
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Table function 'PostgreSQL' must have arguments.");
configuration.emplace(StoragePostgreSQL::getConfiguration(func_args.arguments->children, context));
const auto & settings = context->getSettingsRef();
connection_pool = std::make_shared<postgres::PoolWithFailover>(
*configuration,
settings.postgresql_connection_pool_size,
settings.postgresql_connection_pool_wait_timeout,
POSTGRESQL_POOL_WITH_FAILOVER_DEFAULT_MAX_TRIES,
settings.postgresql_connection_pool_auto_close_connection);
}
void registerTableFunctionPostgreSQL(TableFunctionFactory & factory)
{
factory.registerFunction<TableFunctionPostgreSQL>();
}
}
#endif
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