How to escape this command in a batch file? - batch-file

Question

I want to generate dynamically a set of switches for PG_DUMP like below:
--table=mySchema.foo --table=mySchema.bar ...
However, I want to restrict those switches to views only. The views names don't follow a pattern. They all reside in a single schema called mySchema.
Here is the batch file script I wrote:
#echo off
set PARAM_HOTE=localhost
set PARAM_PORT=5435
set PSQL="C:\Program Files\PostgreSQL\9.4\bin\psql.exe"
set SQL_QUERY=^
select string_agg( '--table=' || quote_ident(nspname) || '.' || quote_ident(relname), ' ' )^
from (^
select *^
from pg_class^
join pg_namespace on pg_namespace.oid = pg_class.relnamespace^
where relkind = 'v'^
and nspname = 'mySchema'^
order by relname ASC^
) infos_vues^
;
for /f %%i in ('"%PSQL%" --quiet --tuples-only --host %PARAM_HOTE% --port %PARAM_PORT% --username "rec" -c "%SQL_QUERY%" db') do set PG_DUMP_SWITCHES_FOR_VIEWS_ONLY=%%i
:: Call PG_DUMP...
When I run it, I am getting the following error:
'"C:\Program Files\PostgreSQL\9.4\bin\psql.exe"" -c "select' is not recognized as an internal
or external command, operable program or batch file.

Answer 1

Here is how I solved my issue:
#echo off
set PARAM_HOTE=localhost
set PARAM_PORT=5435
set PSQL="C:\Program Files\PostgreSQL\9.2\bin\psql.exe"
set SQL_LISTE_VUES=^
select string_agg( concat('--table=' , quote_ident(nspname) , '.' , quote_ident(relname)), ' ' )^
from (^
select *^
from pg_class^
join pg_namespace on pg_namespace.oid = pg_class.relnamespace^
where relkind = 'v'^
and nspname = 'rec'^
order by relname ASC^
) infos_vues^
;
for /f "usebackq delims=" %%i in (`%%PSQL%% --quiet --tuples-only --host %PARAM_HOTE% --port %PARAM_PORT% --username "rec" -c "%SQL_LISTE_VUES%" REC`) do set LISTE_VUES=%%i
echo %LISTE_VUES%
I rewrote my query by replacing || with the concat function
I used back ticks
I escaped % with %% in the for command