Question about partition table

HI Dear PostgreSQL team,

I have created a partition table as bellow:
*CREATE TABLE* measurement_year_month (
logdate date not null,
peaktemp int,
unitsales int
) PARTITION BY RANGE (EXTRACT(YEAR FROM logdate), EXTRACT(MONTH FROM
logdate));

so the content for this column *partexprs* for this table in
pg_partitioned_table will be:

({FUNCEXPR :funcid 1384 :funcresulttype 701 :funcretset false :funcvariadic
false :funcformat 0 :funccollid 0 :inputcollid 100 :args ({CONST :consttype
25 :consttypmod -1 :constcollid 100 :constlen -1 :constbyval false
:constisnull false :location 122 :constvalue 8 [ 32 0 0 0 121 101 97 114 ]}
{VAR :varno 1 :varattno 1 :vartype 1082 :vartypmod -1 :varcollid 0
:varlevelsup 0 :varnoold 1 :varoattno 1 :location 132}) :location 114}
{FUNCEXPR :funcid 1384 :funcresulttype 701 :funcretset false :funcvariadic
false :funcformat 0 :funccollid 0 :inputcollid 100 :args ({CONST :consttype
25 :consttypmod -1 :constcollid 100 :constlen -1 :constbyval false
:constisnull false :location 150 :constvalue 9 [ 36 0 0 0 109 111 110 116
104 ]} {VAR :varno 1 :varattno 1 :vartype 1082 :vartypmod -1 :varcollid 0
:varlevelsup 0 :varnoold 1 :varoattno 1 :location 162}) :location 142})

My question is: Can I get string value from this column? and how?
In the end I want to have the bellow result:

*Table name* *Partition
information*
measurement_year_month (EXTRACT(YEAR FROM logdate),
EXTRACT(MONTH FROM logdate))

Your help is highly appreciated.

Thanks,
Yuxia