Query to find B-tree indexes on array columns

[mfaulther]

Query to find B-tree indexes on array columns

mfvanek/pg-index-health#364

[mfvanek]

Hi @mfaulther,
Thanks for contribution!
Ther are some linter issues:

== [/github/workspace/sql/btree_indexes_on_array_columns.sql] FAIL
L:  23 | P:  20 | RF02 | Unqualified reference '*' found in select with more than
                       | one referenced table/view. [references.qualification]
L:  26 | P:  41 | LT06 | Function name not immediately followed by parenthesis.
                       | [layout.functions]
L:  26 | P:  60 | RF02 | Unqualified reference 'indkey' found in select with more
                       | than one referenced table/view.
                       | [references.qualification]
L:  26 | P:  87 |  PRS | Line 26, Position 87: Found unparsable section:
                       | '[1:indnkeyatts]'
L:  27 | P:  47 | LT12 | Files must end with a single trailing newline.
                       | [layout.end-of-file]

How to run linter locally

pg-index-health-sql/README.md

Line 42 in 521f893

To run super-linter locally

[mfaulther]

@mfvanek
Linter has failed on this line:

and att.attnum = any ((string_to_array(indkey::text, ' ')::int2[])[1:indnkeyatts])

with message:

== [/tmp/lint/sql/btree_indexes_on_array_columns.sql] FAIL
L:  26 | P:  88 |  PRS | Line 26, Position 88: Found unparsable section:
                       | '[1:indnkeyatts]'

But actually it's correct (i checked this query locally, it works correctly without syntax errors)

Found that sqlfluff had bugs with parsing postgres array slices (1,2), that were fixed in version 2.0.4

Can i bump the version of github/super-linter/ from slim-v5 to slim-v6 ? It should help to fix it.

Also, there's another option:
I can change this line:

and att.attnum = any ((string_to_array(indkey::text, ' ')::int2[])[1:indnkeyatts])

to

and att.attnum = any ((string_to_array(indkey::text, ' ')::int2[])[:indnkeyatts])

(simply change [1:indnkeyatts] to [:indnkeyatts])
with this change the linter doesn't fail with version slim-v5

[mfvanek]

@mfaulther

Can i bump the version of github/super-linter/ from slim-v5 to slim-v6 ?

Yes, sure!

[mfvanek]

@mfaulther
Great job! Need only some polish