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Add auto-recreate option into
v0.partition_table__update when schem…
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46 changes: 46 additions & 0 deletions
46
bigquery/@default/v0/@routines/partition_table__update/test_scinario__table_recreation_.sql
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| begin | ||
| declare temp_schema, init_sql, defer_sql string; | ||
| set (temp_schema, init_sql, defer_sql) = (`v0.zgensql__temporary_dataset`(false)); | ||
| execute immediate init_sql; | ||
| begin | ||
| -- Prepare fixtures | ||
| execute immediate format(""" | ||
| create table `%s.bikeshare_stations` | ||
| like bigquery-public-data.austin_bikeshare.bikeshare_stations | ||
| """ | ||
| , temp_schema | ||
| ); | ||
| execute immediate format(""" | ||
| alter table `%s.bikeshare_stations` | ||
| alter column station_id set options (description = 'station id') | ||
| """ | ||
| , temp_schema | ||
| ); | ||
|
|
||
| -- Scenario | ||
| call `v0.partition_table__update`( | ||
| (null, temp_schema, 'bikeshare_stations') | ||
| , [('bigquery-public-data', "austin_bikeshare", "bikeshare_stations")] | ||
| , [('__NULL__', ["__NULL__"])] | ||
| , "select 1 as `new_column`, * from bigquery-public-data.austin_bikeshare.bikeshare_stations" | ||
| , to_json(struct( | ||
| "replace_if_changed" as auto_recreate | ||
| )) | ||
| ); | ||
| set @@dataset_id = temp_schema; | ||
| assert exists( | ||
| select | ||
| description | ||
| from `INFORMATION_SCHEMA.COLUMN_FIELD_PATHS` | ||
| where table_name = "bikeshare_stations" | ||
| and column_name = 'station_id' | ||
| and description is not null | ||
| ); | ||
|
|
||
| -- Tear down fixtures | ||
| execute immediate defer_sql; | ||
| exception when error then | ||
| execute immediate defer_sql; | ||
| raise using message = @@error.message; | ||
| end; | ||
| end; |
108 changes: 108 additions & 0 deletions
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bigquery/@default/v0/@routines/zgensql__table_recreation/ddl.sql
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| CREATE OR REPLACE FUNCTION `v0.zgensql__table_recreation`( | ||
| target_table struct<catalog string, schema string, name string> | ||
| , new_query string | ||
| ) | ||
| OPTIONS( | ||
| description="""Private function to build DDL for table recreation with metadata. | ||
| `CREATE TABLE LIKE` is not suitable when the source table query and target table schema is different. | ||
| This SQL generator's goal is to generate DDL for table recreation with metadata like `CREATE TABLE LIKE` operator. | ||
| """ | ||
| ) | ||
| AS (REPLACE(REPLACE(REPLACE(REPLACE( | ||
| r""" | ||
| with table_definition as ( | ||
| select as value | ||
| ddl | ||
| from `!TABLE_SCHEMA!.INFORMATION_SCHEMA.TABLES` | ||
| where table_name = !TABLE_NAME! | ||
| ) | ||
| , alter_column_options as ( | ||
| select as value | ||
| "ALTER TABLE `!TABLE_IDENTITY!`\n" | ||
| || string_agg( | ||
| format( | ||
| " ALTER COLUMN IF EXISTS `%s` SET OPTIONS(%s)" | ||
| , field_path | ||
| , array_to_string([ | ||
| 'description=' || format('%T', description) | ||
| , 'rounding_mode=' || format('%s', rounding_mode) | ||
| ], ',') | ||
| ) | ||
| , ',\n' | ||
| ) | ||
| from `!TABLE_SCHEMA!.INFORMATION_SCHEMA.COLUMN_FIELD_PATHS` | ||
| where table_name = !TABLE_NAME! | ||
| and (description is not null or rounding_mode is not null) | ||
| -- ALTER COLUMN syntax don't support subfields structure | ||
| and field_path = column_name | ||
| ) | ||
| select as value | ||
| struct( | ||
| array_to_string( | ||
| [ | ||
| "CREATE OR REPLACE TABLE `!TABLE_IDENTITY!`" | ||
| ] | ||
| || ifnull( | ||
| array( | ||
| select as value line | ||
| from unnest(split(table_definition, '\n')) as line | ||
| where | ||
| starts_with(line, 'PARTITION BY') | ||
| or starts_with(line, 'CLUSTER BY') | ||
| or starts_with(line, 'DEFAULT COLLATE') | ||
| ) | ||
| , [] | ||
| ) | ||
| || ( | ||
| [ | ||
| "OPTIONS(" | ||
| ] | ||
| || table_options | ||
| || [")"] | ||
| ) | ||
| || [ | ||
| "AS", | ||
| !TABLE_NEW_QUERY! | ||
| ] | ||
| , '\n') | ||
| as new_table_ddl | ||
| , alter_column_options as column_metadata_ddl | ||
| ) | ||
| from table_definition, alter_column_options | ||
| left join unnest([struct( | ||
| ifnull( | ||
| array( | ||
| select as value line | ||
| from unnest(split(table_definition, '\n')) as line | ||
| where | ||
| starts_with(line, ' description=') | ||
| ) | ||
| , [] | ||
| ) as table_options | ||
| )]) | ||
| """ | ||
| , '!TABLE_SCHEMA!', coalesce(format('%s.%s', target_table.catalog, target_table.schema), target_table.schema, error('Invalid schema argument'))) | ||
| , '!TABLE_NAME!', format('%T', target_table.name)) | ||
| , '!TABLE_IDENTITY!', coalesce( | ||
| format('%s.%s.%s', target_table.catalog, target_table.schema, target_table.name) | ||
| , format('%s.%s', target_table.schema, target_table.name) | ||
| , format('%s', target_table.name) | ||
| , error('Invalid schema argument'))) | ||
| , '!TABLE_NEW_QUERY!', format('%T', new_query)) | ||
| ); | ||
|
|
||
| begin | ||
| call `bqmake.v0.assert_golden`( | ||
| (null, "bqtest", "zgolden_routines"), -- Profiling query | ||
| `bqtest.zbqt_gensql__udf_snapshot`( | ||
| [ | ||
| """`v0.zgensql__table_recreation`(("bigquery-public-data", "san_francisco", "bikeshare_stations"), "SELECT *, 'new' as n FROM `bigquery-public-data.san_francisco.bikeshare_stations` LIMIT 0")""" | ||
| ], | ||
| "zgolden_routines" | ||
| ), | ||
| 'signature', | ||
| true | ||
| ); | ||
| end |