"no previous extern declaration for non-static variable [-Wmissing-variable-declarations]".

Tags: pg_query_state

Add meson.build file to support building from the contrib source tree.

because of using an outdated third-party library.

Add static decoration to avoid error:
"no previous extern declaration for non-static variable [-Wmissing-variable-declarations]".

Progress bar is run-time SQL-query progress indicator.

Function pg_progress_bar(pid) extracts the current query state from backend with specified 'pid'. Then gets the
numerical values of the actual rows and total rows and count progress for the whole query tree. Function returns
numeric value from 0 to 1 describing the measure of query fulfillment. This function can be used to be embedded
in the PostgreSQL GUI.

To intuitively track progress without using a graphical client, you can use the additionally implemented function
pg_progress_bar_visual(pid, delay). It prints state every period specified by 'delay' (in seconds).

Increase version to 1.2 due to init.sql change.

The incorrectly used $_ variable has been replaced with 'postgres'.

Tags: pg_query_state

[PGPRO-14766] Fixed 001_bad_progress_bar.pl

"no previous extern declaration for non-static variable [-Wmissing-variable-declarations]".

Return back changes from the similar commit
d01ea74 (PGPRO-10866: Add static decoration to
avoid error) as they were reverted in the commit
c927d0c (Add progress bar during query
execution to track progress. (#63)).

  Caused by:
  - 3eea7a0c97e94f9570af87317ce3f6a41eb62768 (PostgreSQL)
    Simplify executor's determination of whether to use parallelism.
  - 138323b (pg_query_state subtree)
    Merged versions 9.6 and 10
 Tags: pg_query_state

Author: Anton A. Melnikov

Windows requires sspi user authentification. We need
use some specific configurations for tests so that tests
work the same on different types of systems, including Windows.

See the commit c65bc2e1d14a2d4daed7c1921ac518f2c5ac3d17 (Make it possible for
loadable modules to add EXPLAIN options.) in PostgreSQL 18+.

See the commit 9173e8b604636633a8e3aca54bb56a437bffa718 (Create explain_format.c
and move relevant code there.) in PostgreSQL 18+.

This commit must be reverted later.

Take into account the new structure of files implementing the EXPLAIN command

1. Change backend status to text conversion due to possible status set changes
2. Update Travis CI