Incorrect parameter for number of columns used in seed batch size

[rlshuhart]

dbt-sqlserver/dbt/include/sqlserver/macros/materializations/seeds/helpers.sql

Lines 62 to 63 in 3d202ea

	{% set cols_sql = get_seed_column_quoted_csv(model, agate_table.column_names) %}
	{% set batch_size = calc_batch_size(cols_sql|length, max_batch_size) %}

Hi!

I've noticed that in the above cols_sql|length is not actually returning the number of columns. I'm not entirely sure what number is returning, but it is a far larger number, therefore, causing seeds to insert one row at a time for a 55 column csv. When I overwrite "cols_sql|length" with a hardcoded 55 in the source code, the optimal number of rows per binding appears to be inserted within the 2100 parameter limitation. Fortunately, the fix is simple and I'll submit a PR for review.

Thanks!

[dataders]

closing in favor of #179