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rework incremental models to use a temp table #156

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merged 1 commit into from
Sep 23, 2016
Merged

rework incremental models to use a temp table #156

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40 changes: 21 additions & 19 deletions dbt/templates.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,32 +9,32 @@ class BaseCreateTemplate(object):
# but you cannot explicitly set them in the CREATE TABLE ... LIKE statement.
# via http://docs.aws.amazon.com/redshift/latest/dg/r_CREATE_TABLE_NEW.html
incremental_template = """
create temporary table "{identifier}__dbt_incremental_tmp" {dist_qualifier} {sort_qualifier} as (
create temporary table "{identifier}__dbt_incremental_empty_tmp" {dist_qualifier} {sort_qualifier} as (
select * from (
{query}
) as tmp limit 0
);

create table if not exists "{schema}"."{identifier}" (like "{identifier}__dbt_incremental_tmp");
create table if not exists "{schema}"."{identifier}" (like "{identifier}__dbt_incremental_empty_tmp");

{incremental_delete_statement}

insert into "{schema}"."{identifier}" (
create temporary table "{identifier}__dbt_incremental_tmp" as (
with dbt_incr_sbq as (
{query}
)
select * from dbt_incr_sbq
where ({sql_where}) or ({sql_where}) is null
);

{incremental_delete_statement}

insert into "{schema}"."{identifier}" (
select * from "{identifier}__dbt_incremental_tmp"
);
"""

incremental_delete_template = """
delete from "{schema}"."{identifier}" where ({unique_key}) in (
with dbt_delete_sbq as (
{query}
)
select ({unique_key}) from dbt_delete_sbq
where ({sql_where}) or ({sql_where}) is null
select ({unique_key}) from "{identifier}__dbt_incremental_tmp"
);
"""

Expand Down Expand Up @@ -105,33 +105,35 @@ class DryCreateTemplate(object):


incremental_template = """
create temporary table "{identifier}__dbt_incremental_tmp" {dist_qualifier} {sort_qualifier} as (
create temporary table "{identifier}__dbt_incremental_empty_tmp" {dist_qualifier} {sort_qualifier} as (
select * from (
{query}
) as tmp limit 0
);

create table if not exists "{schema}"."{identifier}" (like "{identifier}__dbt_incremental_tmp");

{incremental_delete_statement}
create table if not exists "{schema}"."{identifier}" (like "{identifier}__dbt_incremental_empty_tmp");

insert into "{schema}"."{identifier}" (
create temporary table "{identifier}__dbt_incremental_tmp" as (
with dbt_incr_sbq as (
{query}
)
select * from dbt_incr_sbq
where ({sql_where}) or ({sql_where}) is null
limit 0
);


{incremental_delete_statement}

insert into "{schema}"."{identifier}" (
select * from "{identifier}__dbt_incremental_tmp"
);
"""

incremental_delete_template = """
delete from "{schema}"."{identifier}" where ({unique_key}) in (
with dbt_delete_sbq as (
{query}
)
select ({unique_key}) from dbt_delete_sbq
where ({sql_where}) or ({sql_where}) is null
select ({unique_key}) from "{identifier}__dbt_incremental_tmp"
);
"""

Expand Down