dbt docs generate error on Snowflake when QUOTED_IDENTIFIERS_IGNORE_CASE is set to True

[clausherther]

dbt docs generate returns the following error on a Snowflake instance where the QUOTED_IDENTIFIERS_IGNORE_CASE parameter is set to True

Encountered an error:
'table_schema'

That is because the following query issued by dbt to get the catalog will have upper case column names.

with tables as (

        select
            table_schema as "table_schema",
            table_name as "table_name",
            table_type as "table_type",

            -- note: this is the _role_ that owns the table
            table_owner as "table_owner",

            'Clustering Key' as "stats:clustering_key:label",
            clustering_key as "stats:clustering_key:value",
            'The key used to cluster this table' as "stats:clustering_key:description",
            (clustering_key is not null) as "stats:clustering_key:include",

            'Row Count' as "stats:row_count:label",
            row_count as "stats:row_count:value",
            'An approximate count of rows in this table' as "stats:row_count:description",
            (row_count is not null) as "stats:row_count:include",

            'Approximate Size' as "stats:bytes:label",
            bytes as "stats:bytes:value",
            'Approximate size of the table as reported by Snowflake' as "stats:bytes:description",
            (bytes is not null) as "stats:bytes:include"

        from information_schema.tables

    ),

    columns as (

        select

            table_schema as "table_schema",
            table_name as "table_name",
            null as "table_comment",

            column_name as "column_name",
            ordinal_position as "column_index",
            data_type as "column_type",
            null as "column_comment"

        from information_schema.columns

    )

    select *
    from tables
    join columns using ("table_schema", "table_name")
    where "table_schema" != 'INFORMATION_SCHEMA'
    order by "column_index"  

table_schema	table_name
ACCT	F_REGISTRATIONS

[beckjake]

Fixed in #998