[GRASS-git] [OSGeo/grass] 2a7fe2: db.select: Adding JSON and CSV support (#6728)

[Gulshan Kumar]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: 2a7fe23c50574a096f599cd43436ae45178bf96d
      https://github.com/OSGeo/grass/commit/2a7fe23c50574a096f599cd43436ae45178bf96d
  Author: Gulshan Kumar <72340125+gulshan-123 at users.noreply.github.com>
  Date:   2025-12-26 (Fri, 26 Dec 2025)

  Changed paths:
    M db/CMakeLists.txt
    M db/db.select/Makefile
    M db/db.select/main.c
    A db/db.select/testsuite/test_db_select_json_csv.py

  Log Message:
  -----------
  db.select: Adding JSON and CSV support (#6728)

* WIP added json+plain

* added plain + json format as of now

* added error handling

* json output to file + removed redundant set_string call

* added support for exclusion

* added support for vertical, and csv too

By default, for backward copatibilty format=plain with separator as |

* added json format for -d

* added tests

* solved issue where delimiter is also in the text

* nitpicks

* [deprecated] placements

* json excludes -c flag

* json will be array, and can be read for multiple sql

* refactored code so that on -d empty records array are not displayed

* refactored code + error handling

* added test for multiple queries

* test in separate class

* array returned only in case of input, where possibly many sql statement can be present

* updated test

* fixed possible memory leak



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