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54 lines
1.4 KiB
54 lines
1.4 KiB
-- Find thousand and decimal digits separators
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CREATE OR REPLACE FUNCTION @extschema@.CDB_DigitSeparator (rel REGCLASS, fld TEXT, OUT t CHAR, OUT d CHAR)
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as $$
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DECLARE
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sql TEXT;
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rec RECORD;
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BEGIN
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-- We're only interested in rows with either "," or '.'
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sql := 'SELECT ' || quote_ident(fld) || ' as f FROM ' || rel::text
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|| ' WHERE ' || quote_ident(fld) || ' ~ ''[,.]''';
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FOR rec IN EXECUTE sql
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LOOP
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-- Any separator appearing more than once
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-- will be assumed to be thousand separator
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IF rec.f ~ ',.*,' THEN
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t := ','; d := '.';
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RETURN;
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ELSIF rec.f ~ '\..*\.' THEN
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t := '.'; d := ',';
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RETURN;
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END IF;
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-- If both separator are present, rightmost
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-- will be assumed to be decimal separator
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IF rec.f ~ '\.' AND rec.f ~ ',' THEN
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rec.f = reverse(rec.f);
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IF strpos(rec.f, ',') < strpos(rec.f, '.') THEN
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t := '.'; d := ',';
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ELSE
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t := ','; d := '.';
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END IF;
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RETURN;
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END IF;
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-- A separator NOT followed by 3 digits
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-- will be assumed to be decimal separator
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IF rec.f ~ ',' AND rec.f !~ '(,[0-9]{3}$)|(,[0-9]{3}[,.])' THEN
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t := '.'; d := ',';
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RETURN;
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ELSIF rec.f ~ '\.' AND rec.f !~ '(\.[0-9]{3}$)|(\.[0-9]{3}[,.])' THEN
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t := ','; d := '.';
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RETURN;
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END IF;
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-- Otherwise continue looking
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END LOOP;
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END
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$$
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LANGUAGE 'plpgsql' STABLE STRICT PARALLEL SAFE;
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