Update generate_series example to use NOW()::timestamp since timestamptz is not supported for generate_series

[kwannoel]

Description

generate_series only works with timestamp, not timestamptz. The example in our doc fails due to this. Perhaps some regression? Not sure if NOW() changed to return timestamptz instead of timestamp.

dev=> create materialized view m1 as SELECT time::timestamptz FROM generate_series(
  '2020-01-01 00:00:00',
  now(),
  interval '1 hour'
) t(time);
ERROR:  Failed to run the query

Caused by:
  function generate_series(unknown, timestamp with time zone, interval) does not exist


dev=> create materialized view m1 as SELECT * FROM generate_series(
  '2020-01-01 00:00:00'::timestamptz,
  now(),
  interval '1 hour'
);
NOTICE:  Your session timezone is UTC. It was used in the interpretation of timestamps and dates in your query. If this is unintended, change your timezone to match that of your data's with `set timezone = [timezone]` or rewrite your query with an explicit timezone conversion, e.g. with `AT TIME ZONE`.

CREATE_MATERIALIZED_VIEW

Related code PR

Related doc issue

Resolve

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Checklist

• I have checked the doc site preview, and the updated parts look good.
• I have acquired the approval from the owner (and optionally the reviewers) of the code PR and at least one tech writer (emile-00, hengm3467, & WanYixian).

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[stdrc]

Streaming generate_series with now() as end doesn't go through the normal function binding path. The example in doc is streaming query, not batch query, though this is indeed a bit confusing.

[kwannoel]

Streaming generate_series with now() as end doesn't go through the normal function binding path. The example in doc is streaming query, not batch query, though this is indeed a bit confusing.

dev=> create materialized view m1 as SELECT time::timestamptz FROM generate_series(
  '2020-01-01 00:00:00',
  now(),
  interval '1 hour'
) t(time);
ERROR:  Failed to run the query

Caused by:
  function generate_series(unknown, timestamp with time zone, interval) does not exist

Is it a regression then? 🤔

[stdrc]

Streaming generate_series with now() as end doesn't go through the normal function binding path. The example in doc is streaming query, not batch query, though this is indeed a bit confusing.

dev=> create materialized view m1 as SELECT time::timestamptz FROM generate_series(
  '2020-01-01 00:00:00',
  now(),
  interval '1 hour'
) t(time);
ERROR:  Failed to run the query

Caused by:
  function generate_series(unknown, timestamp with time zone, interval) does not exist

Is it a regression then? 🤔

Interesting... Let me fix this tmr🤣

[kwannoel]

Streaming generate_series with now() as end doesn't go through the normal function binding path. The example in doc is streaming query, not batch query, though this is indeed a bit confusing.

dev=> create materialized view m1 as SELECT time::timestamptz FROM generate_series(
  '2020-01-01 00:00:00',
  now(),
  interval '1 hour'
) t(time);
ERROR:  Failed to run the query

Caused by:
  function generate_series(unknown, timestamp with time zone, interval) does not exist

Is it a regression then? 🤔

Interesting... Let me fix this tmr🤣

Okay no rush, you can take a look first. I updated the doc accoridngly. Thanks for clarifying it's in streaming, I missed that part.