add nolock to sys.indexes calls

Author: sdebruyn

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

@@ -4,8 +4,9 @@
  {%- set full_relation = '"' ~ relation.schema ~ '"."' ~ relation.identifier ~ '"' -%}
  use [{{ relation.database }}];
  if EXISTS (
- SELECT * FROM
- sys.indexes WHERE name = '{{cci_name}}'
+ SELECT *
+ FROM sys.indexes with (nolock)
+ WHERE name = '{{cci_name}}'
  AND object_id=object_id('{{relation_name}}')
  )
  DROP index {{full_relation}}.{{cci_name}}
@@ -32,8 +33,9 @@
 declare @drop_xml_indexes nvarchar(max);
 select @drop_xml_indexes = (
  select 'IF INDEXPROPERTY(' + CONVERT(VARCHAR(MAX), sys.tables.[object_id]) + ', ''' + sys.indexes.[name] + ''', ''IndexId'') IS NOT NULL DROP INDEX [' + sys.indexes.[name] + '] ON ' + '[' + SCHEMA_NAME(sys.tables.[schema_id]) + '].[' + OBJECT_NAME(sys.tables.[object_id]) + ']; '
-from sys.indexes
- inner join sys.tables on sys.indexes.object_id = sys.tables.object_id
+from sys.indexes with (nolock)
+ inner join sys.tables with (nolock)
+ on sys.indexes.object_id = sys.tables.object_id
  where sys.indexes.[name] is not null
  and sys.indexes.type_desc = 'XML'
  and sys.tables.[name] = '{{ this.table }}'
@@ -52,8 +54,9 @@ select @drop_xml_indexes = (
 declare @drop_spatial_indexes nvarchar(max);
 select @drop_spatial_indexes = (
  select 'IF INDEXPROPERTY(' + CONVERT(VARCHAR(MAX), sys.tables.[object_id]) + ', ''' + sys.indexes.[name] + ''', ''IndexId'') IS NOT NULL DROP INDEX [' + sys.indexes.[name] + '] ON ' + '[' + SCHEMA_NAME(sys.tables.[schema_id]) + '].[' + OBJECT_NAME(sys.tables.[object_id]) + ']; '
- from sys.indexes
- inner join sys.tables on sys.indexes.object_id = sys.tables.object_id
+ from sys.indexes with (nolock)
+ inner join sys.tables with (nolock)
+ on sys.indexes.object_id = sys.tables.object_id
  where sys.indexes.[name] is not null
  and sys.indexes.type_desc = 'Spatial'
  and sys.tables.[name] = '{{ this.table }}'
@@ -116,8 +119,9 @@ select @drop_pk_constraints = (
 declare @drop_remaining_indexes_last nvarchar(max);
 select @drop_remaining_indexes_last = (
  select 'IF INDEXPROPERTY(' + CONVERT(VARCHAR(MAX), sys.tables.[object_id]) + ', ''' + sys.indexes.[name] + ''', ''IndexId'') IS NOT NULL DROP INDEX [' + sys.indexes.[name] + '] ON ' + '[' + SCHEMA_NAME(sys.tables.[schema_id]) + '].[' + OBJECT_NAME(sys.tables.[object_id]) + ']; '
- from sys.indexes
- inner join sys.tables on sys.indexes.object_id = sys.tables.object_id
+ from sys.indexes with (nolock)
+ inner join sys.tables with (nolock)
+ on sys.indexes.object_id = sys.tables.object_id
  where sys.indexes.[name] is not null
  and sys.tables.[name] = '{{ this.table }}'
  for xml path('')
@@ -132,10 +136,10 @@ select @drop_remaining_indexes_last = (
 
 {% set idx_name = this.table + '__clustered_index_on_' + columns|join('_') %}
 
-if not exists(select * from sys.indexes
- where
- name = '{{ idx_name }}' and
- object_id = OBJECT_ID('{{ this }}')
+if not exists(select *
+ from sys.indexes with (nolock)
+ where name = '{{ idx_name }}'
+ and object_id = OBJECT_ID('{{ this }}')
 )
 begin
 
@@ -160,10 +164,10 @@ end
  {% set idx_name = this.table + '__index_on_' + columns|join('_')|replace(" ", "_") %}
 {% endif %}
 
-if not exists(select * from sys.indexes
- where
- name = '{{ idx_name }}' and
- object_id = OBJECT_ID('{{ this }}')
+if not exists(select *
+ from sys.indexes with (nolock)
+ where name = '{{ idx_name }}'
+ and object_id = OBJECT_ID('{{ this }}')
 )
 begin
 create nonclustered index

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

@@ -45,7 +45,7 @@
  EXEC sp_rename '{{ from_relation.schema }}.{{ from_relation.identifier }}', '{{ to_relation.identifier }}'
  IF EXISTS(
  SELECT *
- FROM sys.indexes
+ FROM sys.indexes with (nolock)
  WHERE name='{{ from_relation.schema }}_{{ from_relation.identifier }}_cci' and object_id = OBJECT_ID('{{ from_relation.schema }}.{{ to_relation.identifier }}'))
  EXEC sp_rename N'{{ from_relation.schema }}.{{ to_relation.identifier }}.{{ from_relation.schema }}_{{ from_relation.identifier }}_cci', N'{{ from_relation.schema }}_{{ to_relation.identifier }}_cci', N'INDEX'
  {%- endcall %}