unwrap the newly created json arrangement and dynamically create a temp table

srce.pgsql

@@ -1,3 +1,4 @@
+/*
 SELECT
 jsonb_pretty(
 $$
@@ -40,3 +41,34 @@ $$
 }
 $$::jsonb
 )
+*/
+
+DO $$
+
+declare _t text;
+
+begin
+	
+	SELECT
+        string_agg(quote_ident(prs.key)||' '||prs.type,',')
+    INTO
+    	_t
+    FROM 
+        TPS.srce
+        --unwrap the schema definition array
+        LEFT JOIN LATERAL jsonb_populate_recordset(null::tps.srce_defn_schema, defn->'schema') prs ON TRUE
+    GROUP BY
+        srce;
+        
+    raise notice '%', _t;
+    _t := format('CREATE TEMP TABLE csv_i (%s)', _t);
+    raise notice '%', _t;
+    
+    DROP TABLE IF EXISTS csv_i;
+    
+    EXECUTE _t;
+
+end
+$$;
+
+SELECT * FROM csv_i;