RPostgres 1.4.2

Features

• dbWriteTable() uses savepoints for its transactions, even if an external transaction is open. This does not affect Redshift, because savepoints are not supproted there (#342).
• With dbConnect(check_interrupts = TRUE), interrupting a query now gives a dedicated error message. Very short-running queries no longer take one second to complete (#344).

Bug fixes

• dbQuoteLiteral() correctly quotes length-0 values (#355) and generates typed NULL expressions for NA values (#357).
• The SET DATESTYLE query sent after connecting uses quotes for compatibility with CockroachDB (#360).

Internal

• dbConnect() executes initial queries with immediate = TRUE (#346).
• Check Postgres starting from version 10 on GitHub Actions (#368).
• Fix build on Ubuntu 16.04 (#352).
• Mention libssl-dev in configure script (#350).