add sql generation function to main setup

deploy/setup.sql

@@ -151,6 +151,7 @@ ALTER TABLE ONLY tps.trans
 
 -------------create functions------------------------------------------------------------------------------------------------------------------------
 
+-----set source
 CREATE FUNCTION tps.srce_set(_defn jsonb) RETURNS jsonb
 AS
 $f$
@@ -216,4 +217,37 @@ BEGIN
     RETURN _message;
 END;
 $f$
+LANGUAGE plpgsql;
+
+-----generate sql to create select based on schema
+CREATE FUNCTION tps.build_srce_view_sql(_srce text, _schema text) RETURNS TEXT
+AS
+$f$
+DECLARE	
+	--_schema text;
+	_path text[];
+	--_srce text;
+	_sql text;
+BEGIN
+    --_schema:= 'default';
+	_path:= ARRAY['schemas',_schema]::text[];
+	--_srce:= 'dcard';
+SELECT
+	'CREATE VIEW tpsv.'||_srce||'_'||_path[2]||' AS SELECT '||string_agg('(rec#>>'''||r.PATH::text||''')::'||r.type||' AS "'||r.column_name||'"',', ')||' FROM tps.trans WHERE srce = '''||_srce||''''
+INTO	
+	_sql
+FROM
+	tps.srce
+	JOIN LATERAL jsonb_array_elements(defn#>_path) ae(v) ON TRUE
+	JOIN LATERAL jsonb_to_record (ae.v) AS r(PATH text[], "type" text, column_name text) ON TRUE 
+WHERE
+	srce = _srce
+GROUP BY
+	srce.srce;
+
+RETURN _sql;
+RAISE NOTICE '%',_sql;
+
+END
+$f$
 LANGUAGE plpgsql;