106 lines
3.0 KiB
PL/PgSQL
106 lines
3.0 KiB
PL/PgSQL
DO $$
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DECLARE _t text;
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DECLARE _c text;
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BEGIN
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----------------------------------------------------build the column list of the temp table----------------------------------------------------------------
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SELECT
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string_agg(quote_ident(prs.key)||' '||prs.type,','),
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string_agg(quote_ident(prs.key),',')
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INTO
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_t,
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_c
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FROM
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TPS.srce
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--unwrap the schema definition array
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LEFT JOIN LATERAL jsonb_populate_recordset(null::tps.srce_defn_schema, defn->'schema') prs ON TRUE
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WHERE
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srce = 'DCARD'
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GROUP BY
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srce;
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----------------------------------------------------add create table verbage in front of column list--------------------------------------------------------
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_t := format('CREATE TEMP TABLE csv_i (%s, id SERIAL)', _t);
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--RAISE NOTICE '%', _t;
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--RAISE NOTICE '%', _c;
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DROP TABLE IF EXISTS csv_i;
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EXECUTE _t;
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----------------------------------------------------do the insert-------------------------------------------------------------------------------------------
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--the column list needs to be dynamic forcing this whole line to be dynamic
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_t := format('COPY csv_i (%s) FROM ''C:\Users\fleet\downloads\dfs.csv'' WITH (HEADER TRUE,DELIMITER '','', FORMAT CSV, ENCODING ''SQL_ASCII'',QUOTE ''"'');',_c);
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--RAISE NOTICE '%', _t;
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EXECUTE _t;
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END
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$$;
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--*******************************************
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--this needs to aggregate on id sequence
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--*******************************************
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WITH pending_list AS (
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SELECT
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---creates a key value pair and then aggregates rows of key value pairs
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jsonb_object_agg(
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(ae.e::text[])[1], --the key name
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(row_to_json(i)::jsonb) #> ae.e::text[] --get the target value from the key from the csv row that has been converted to json
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) json_key,
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row_to_json(i)::JSONB - 'id' rec,
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srce,
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--ae.rn,
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id
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FROM
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csv_i i
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INNER JOIN tps.srce s ON
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s.srce = 'DCARD'
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LEFT JOIN LATERAL JSONB_ARRAY_ELEMENTS_TEXT(defn->'unique_constraint'->'fields') WITH ORDINALITY ae(e, rn) ON TRUE
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GROUP BY
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i.*,
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srce,
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id
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ORDER BY
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id
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)
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------results of an insert operation--------------
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, inserted AS (
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INSERT INTO
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tps.trans (srce, rec)
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SELECT
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pl.srce
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,pl.rec
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FROM
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pending_list pl
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LEFT JOIN tps.trans t ON
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t.srce = pl.srce
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AND t.rec @> pl.json_key
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WHERE
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t IS NULL
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----this conflict is only if an exact duplicate rec json happens, which will be rejected
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----therefore, records may not be inserted due to ay matches with certain json fields, or if the entire json is a duplicate, reason is not specified
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RETURNING *
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)
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----records not inserted------
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SELECT
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srce
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,rec
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FROM
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pending_list
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EXCEPT ALL
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SELECT
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srce
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,rec
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FROM
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inserted; |