sqlsmith: Generate table function

[kwannoel]

• generate_series
• unnest
• regexp_match
• range
• jsonb_array_elements
• jsonb_array_elements_text
• jsonb_each
• jsonb_each_text
• jsonb_object_keys

See: https://github.com/risingwavelabs/risingwave/blob/main/src/expr/src/table_function/mod.rs

[kwannoel]

There's no other table functions besides hop and tumble, which are already generated 😅

[neverchanje]

Actually there is, such as generate_series, unnest. But since they are less used in the real world, without them will be fine.

[kwannoel]

Actually there is, such as generate_series, unnest. But since they are less used in the real world, without them will be fine.

I see, I will track these under refinements, thanks.

[kwannoel]

Reopen to track for regexp_match, as well as other table functions. cc @xxchan