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25 lines
649 B
25 lines
649 B
3 years ago
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create SEQUENCE table_id_seq
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START WITH 1
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INCREMENT BY 1
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NO MINVALUE
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NO MAXVALUE
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CACHE 1;
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CREATE OR REPLACE FUNCTION "public"."snow_next_id"(OUT "result" int8)
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RETURNS "pg_catalog"."int8" AS $BODY$
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DECLARE
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our_epoch bigint := 1314220021721;
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seq_id bigint;
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now_millis bigint;
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shard_id int := 5;
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BEGIN
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seq_id := nextval('table_id_seq') % 1024;
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SELECT FLOOR(EXTRACT(EPOCH FROM clock_timestamp()) * 1000) INTO now_millis;
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result := (now_millis - our_epoch) << 23;
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result := result | (shard_id << 10);
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result := result | (seq_id);
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END;
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$BODY$
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LANGUAGE plpgsql VOLATILE
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COST 100
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