From a1123efa408d13d4c5646ad100c5a6f9711681d2 Mon Sep 17 00:00:00 2001
From: Paul Trowbridge <fleetside72@hotmail.com>
Date: Sat, 10 Mar 2018 01:12:18 -0500
Subject: [PATCH] add dev file for source import to dynamically run sql

---
 functions/srce_import_dev.sql | 137 ++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 functions/srce_import_dev.sql

diff --git a/functions/srce_import_dev.sql b/functions/srce_import_dev.sql
new file mode 100644
index 0000000..c4adc6b
--- /dev/null
+++ b/functions/srce_import_dev.sql
@@ -0,0 +1,137 @@
+DO $F$
+DECLARE _t text;
+DECLARE _c text;
+DECLARE _log_info jsonb;
+DECLARE _log_id text;
+DECLARE _cnt numeric;
+DECLARE _message jsonb;
+_MESSAGE_TEXT text;
+_PG_EXCEPTION_DETAIL text;
+_PG_EXCEPTION_HINT text;
+_path text;
+_srce text;
+
+BEGIN
+
+    _path := 'C:\users\fleet\downloads\testj.csv';
+    _srce := 'DMAPI';
+
+----------------------------------------------------test if source exists----------------------------------------------------------------------------------
+
+    SELECT
+        COUNT(*)
+    INTO
+        _cnt
+    FROM
+        tps.srce    
+    WHERE
+        srce = _srce;
+
+    IF _cnt = 0 THEN
+        _message:= 
+        format(
+            $$
+                {
+                    "status":"fail",
+                    "message":"source %L does not exists"
+                }
+            $$,
+            _srce
+        )::jsonb;
+    END IF;
+----------------------------------------------------build the column list of the temp table----------------------------------------------------------------
+
+	SELECT
+        string_agg(quote_ident(prs.key)||' '||prs.type,','),
+        string_agg(quote_ident(prs.key),',')
+    INTO
+    	_t, 
+        _c
+    FROM 
+        tps.srce
+        --unwrap the schema definition array
+        LEFT JOIN LATERAL jsonb_populate_recordset(null::tps.srce_defn_schema, defn->'schema') prs ON TRUE
+    WHERE   
+        srce = _srce
+    GROUP BY
+        srce;
+        
+----------------------------------------------------add create table verbage in front of column list--------------------------------------------------------
+
+    _t := format('CREATE TEMP TABLE csv_i (%s, id SERIAL)', _t);
+    --RAISE NOTICE '%', _t;
+    --RAISE NOTICE '%', _c;
+
+    DROP TABLE IF EXISTS csv_i;
+    
+    EXECUTE _t;
+
+----------------------------------------------------do the insert-------------------------------------------------------------------------------------------
+
+    --the column list needs to be dynamic forcing this whole line to be dynamic
+    _t := format('COPY csv_i (%s) FROM %L WITH (HEADER TRUE,DELIMITER '','', FORMAT CSV, ENCODING ''SQL_ASCII'',QUOTE ''"'');',_c,_path);
+
+    --RAISE NOTICE '%', _t;
+
+    EXECUTE _t;
+	
+	drop table if exists tps.x;
+	create table tps.x as
+	(
+    WITH 
+
+    -------------extract the limiter fields to one row per source----------------------------------
+
+    ext AS (
+    SELECT 
+        srce
+        ,defn->'unique_constraint'->>'fields'
+        ,ARRAY(SELECT ae.e::text[] FROM jsonb_array_elements_text(defn->'unique_constraint'->'fields') ae(e)) text_array
+    FROM
+        tps.srce
+    WHERE
+        srce = _srce
+        --add where clause for targeted source
+    )
+
+    -------------for each imported row in the COPY table, genereate the json rec, and a column for the json key specified in the srce.defn-----------
+
+    ,pending_list AS (
+        SELECT
+            tps.jsonb_extract(
+                    row_to_json(i)::jsonb
+                    ,ext.text_array
+            ) json_key,
+            row_to_json(i)::JSONB rec,
+            srce,
+            --ae.rn,
+            id
+        FROM
+            csv_i i
+            INNER JOIN ext ON
+                ext.srce = _srce
+        ORDER BY    
+            id ASC
+    )
+    
+
+    -----------create a unique list of keys from staged rows------------------------------------------------------------------------------------------
+
+    , pending_keys AS (
+        SELECT DISTINCT
+            json_key
+        FROM 
+            pending_list
+    )
+    
+    
+    select * from pending_keys
+	) with data;
+end;
+$F$;
+SELECT
+    k.json_key, T.REC
+FROM
+    tps.x k
+    left outer JOIN tps.trans t ON
+        t.rec @> k.json_key;
\ No newline at end of file