v-update-sys-rrd-pgsql not work

[MuadDiib]

CentOS 7
v-update-sys-rrd-pgsql:
- line 76

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        sql="psql -h $HOST -U $USER -c"

.....
- line 88

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status=$($sql psql -d postgres -c "$q" 2>/dev/null); code="$?"

- - - - - - - - - - - -

how it's work?

PostgreSQL logs spamed by

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2021-02-05 00:35:02.348 EET [30291] ERROR:  syntax error at or near "psql" at character 1
2021-02-05 00:35:02.348 EET [30291] STATEMENT:  psql