Release 2.7.0

Note: Building and running oracle_fdw with old minor releases may fail; see the installation requirement documentation for details.

Bugfixes

• Don't push down LIMIT without an ORDER BY clause.
  This can lead to wrong results in some cases.
  Report by @fbattke.
• Fix support for query parameters of type uuid.
  This led to errors like

  error executing query: OCINumberFromText failed to convert parameter
  OCI-22062: invalid input string [8feee298-7ce5-4761-9487-34cab831fead]
  

  Report by @VictorRas.
• Fix a memory leak in statements that return LOBs.
  The memory for LOB locators didn't get released before the end of the transaction, so running many statements in a single transaction could cause out-of-memory errors and server crashes.
  Report by @JosefMachytkaNetApp.
• Fix building on Windows with PostgreSQL versions older than v15.
  This used to report "unresolved external symbol XactReadOnly".
  Report by @w0pr.
• Fix crash or empty result when reading larger CLOBs.
  Report by @sabineWalter and @vlisterik.
• Bind empty string parameters as NULL values.
  Failure to do that led to the error

  ORA-01459: invalid length for variable character string
  

  during the attempt to INSERT empty strings in a foreign table.
  Report by @adrianboangiu and @intgr.

Enhancements

• Speed up IMPORT FOREIGN SCHEMA ... LIMIT TO (...) by filtering out tables whose name don't match on the Oracle side.
  Per suggestion from @joaostorrer.
• Add options skip_tables, skip_views and skip_matviews to IMPORT FOREIGN SCHEMA.
  From a patch by @mkgrgis.