Merge pull request #374 from dbt-msft/more-nolocks

add nolock to more metadata calls to avoid deadlocks

Author: sdebruyn

dbt/include/sqlserver/macros/adapters/apply_grants.sql

@@ -2,7 +2,7 @@
  select
  GRANTEE as grantee,
  PRIVILEGE_TYPE as privilege_type
- from INFORMATION_SCHEMA.TABLE_PRIVILEGES
+ from INFORMATION_SCHEMA.TABLE_PRIVILEGES with (nolock)
  where TABLE_CATALOG = '{{ relation.database }}'
  and TABLE_SCHEMA = '{{ relation.schema }}'
  and TABLE_NAME = '{{ relation.identifier }}'

dbt/include/sqlserver/macros/adapters/columns.sql

@@ -9,8 +9,8 @@
  c.max_length as character_maximum_length,
  c.precision as numeric_precision,
  c.scale as numeric_scale
- from [{{ 'tempdb' if '#' in relation.identifier else relation.database }}].sys.columns c
- inner join sys.types t
+ from [{{ 'tempdb' if '#' in relation.identifier else relation.database }}].sys.columns c with (nolock)
+ inner join sys.types t with (nolock)
  on c.user_type_id = t.user_type_id
  where c.object_id = object_id('{{ 'tempdb..' ~ relation.include(database=false, schema=false) if '#' in relation.identifier else relation }}')
  )

dbt/include/sqlserver/macros/adapters/metadata.sql

@@ -92,7 +92,7 @@
  column_name,
  ordinal_position as column_index,
  data_type as column_type
- from INFORMATION_SCHEMA.COLUMNS
+ from INFORMATION_SCHEMA.COLUMNS with (nolock)
 
  )
 
@@ -129,7 +129,7 @@
  {% call statement('list_schemas', fetch_result=True, auto_begin=False) -%}
  USE {{ database }};
  select name as [schema]
- from sys.schemas
+ from sys.schemas with (nolock)
  {% endcall %}
  {{ return(load_result('list_schemas').table) }}
 {% endmacro %}