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e988c36bf0
This change adds support to change column definitions in ALTER VIEW
statements. This support only required minor changes in the parser
and the AlterViewStmt constructor.
Here's an example syntax:
alter view foo (a, b comment 'helloworld') as
select * from bar;
describe foo;
+------+--------+------------+
| name | type | comment |
+------+--------+------------+
| a | string | |
| b | string | helloworld |
+------+--------+------------+
The following tests were modified:
1. ParserTest - To check that the parser handles column definitions
for alter view statements.
2. AnalyzerDDLTest - To ensure that the analyzer supports the
change column definitions parsed.
3. TestDdlStatements - To verify the end-to-end functioning of
ALTER VIEW statements with change column definitions.
4. AuthorizationTest - To ensure that alter table commands with
column definitions check permissions as expected.
Change-Id: I6073444a814a24d97e80df15fcd39be2812f63fc
Reviewed-on: http://gerrit.cloudera.org:8080/10720
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
351 lines
8.0 KiB
Plaintext
351 lines
8.0 KiB
Plaintext
====
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---- QUERY
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# Create a simple view without renaming the columns.
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create view $DATABASE.simple_view as
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select * from functional.alltypes
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---- RESULTS
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'View has been created.'
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====
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---- QUERY
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# Test that 'if not exists' swallows the error (view already exists)
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create view if not exists $DATABASE.simple_view as
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select * from functional.alltypesagg
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---- RESULTS
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'View already exists.'
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====
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---- QUERY
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# Create another simple view with 'if not exists' on a subset of
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# alltypes' columns using custom column names and comments
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create view if not exists
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$DATABASE.simple_view_sub (x, y comment 'hello', z) as
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select int_col, string_col, timestamp_col from functional.alltypes
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---- RESULTS
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'View has been created.'
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====
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---- QUERY
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# Create a view on a parquet table (Hive cannot create/read/write parquet)
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create view $DATABASE.parquet_view as
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select * from functional_parquet.alltypes where id < 20
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---- RESULTS
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'View has been created.'
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====
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---- QUERY
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# Create a complex view with predicates, joins, aggregates and order by
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create view $DATABASE.complex_view (abc comment 'agg', xyz comment 'gby') as
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select count(a.bigint_col), b.string_col from
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functional.alltypesagg a inner join functional.alltypestiny b
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on a.id = b.id where a.bigint_col < 50
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group by b.string_col having count(a.bigint_col) > 1
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order by b.string_col limit 100
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---- RESULTS
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'View has been created.'
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====
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---- QUERY
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# Create a view on a view
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create view $DATABASE.view_view (aaa, bbb) as
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select * from $DATABASE.complex_view
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---- RESULTS
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'View has been created.'
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====
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---- QUERY
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# Test that the views are displayed by 'show tables'
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show tables in $DATABASE
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---- RESULTS
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'complex_view'
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'parquet_view'
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'simple_view'
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'simple_view_sub'
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'view_view'
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====
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---- QUERY
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# Test that the views can be described
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describe $DATABASE.simple_view
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---- RESULTS
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'id','int',''
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'bool_col','boolean',''
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'tinyint_col','tinyint',''
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'smallint_col','smallint',''
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'int_col','int',''
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'bigint_col','bigint',''
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'float_col','float',''
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'double_col','double',''
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'date_string_col','string',''
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'string_col','string',''
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'timestamp_col','timestamp',''
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'year','int',''
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'month','int',''
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---- TYPES
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string,string,string
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====
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---- QUERY
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describe $DATABASE.simple_view_sub
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---- RESULTS
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'x','int',''
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'y','string','hello'
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'z','timestamp',''
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---- TYPES
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string,string,string
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====
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---- QUERY
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describe $DATABASE.complex_view
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---- RESULTS
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'abc','bigint','agg'
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'xyz','string','gby'
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---- TYPES
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string,string,string
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====
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---- QUERY
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describe $DATABASE.parquet_view
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---- RESULTS
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'id','int',''
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'bool_col','boolean',''
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'tinyint_col','tinyint',''
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'smallint_col','smallint',''
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'int_col','int',''
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'bigint_col','bigint',''
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'float_col','float',''
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'double_col','double',''
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'date_string_col','string',''
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'string_col','string',''
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'timestamp_col','timestamp',''
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'year','int',''
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'month','int',''
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---- TYPES
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string,string,string
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====
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---- QUERY
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describe $DATABASE.view_view
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---- RESULTS
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'aaa','bigint',''
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'bbb','string',''
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---- TYPES
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string,string,string
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====
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---- QUERY
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# Test that the views can be queried.
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select count(*) from $DATABASE.simple_view
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---- RESULTS
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7300
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---- TYPES
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bigint
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====
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---- QUERY
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select count(*) from $DATABASE.simple_view_sub
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---- RESULTS
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7300
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---- TYPES
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bigint
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====
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---- QUERY
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select count(*) from $DATABASE.complex_view
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---- RESULTS
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2
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---- TYPES
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bigint
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====
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---- QUERY
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select count(*) from $DATABASE.parquet_view
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---- RESULTS
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20
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---- TYPES
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bigint
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====
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---- QUERY
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select count(*) from $DATABASE.view_view
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---- RESULTS
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2
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---- TYPES
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bigint
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====
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---- QUERY
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# Test dropping a view
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drop view $DATABASE.simple_view_sub
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---- RESULTS
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'View has been dropped.'
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====
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---- QUERY
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# Test that the view is gone
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show tables in $DATABASE
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---- RESULTS
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'complex_view'
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'parquet_view'
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'simple_view'
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'view_view'
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====
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---- QUERY
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# Test 'if exists' for dropping a view (view does not exist)
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drop view if exists $DATABASE.bad_view
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---- RESULTS
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'View does not exist.'
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====
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---- QUERY
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# Test 'if exists' does not drop a table with same name
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create table $DATABASE.drop_tbl_test(a int)
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---- RESULTS
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'Table has been created.'
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====
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---- QUERY
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drop view if exists $DATABASE.drop_tbl_test
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---- RESULTS
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'Drop view is not allowed on a table.'
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====
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---- QUERY
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# Test drop table 'if exists' does not drop a view with same name.
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# We try to drop a table with name complex_view and it should should
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# still be listed in the subsequent show tables output (as a view).
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drop table if exists $DATABASE.complex_view
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---- RESULTS
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'Drop table is not allowed on a view.'
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====
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---- QUERY
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# Test that the table is present
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show tables in $DATABASE
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---- RESULTS
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'drop_tbl_test'
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'complex_view'
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'parquet_view'
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'simple_view'
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'view_view'
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====
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---- QUERY
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# Test renaming a view
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alter view $DATABASE.view_view rename to $DATABASE.view_on_view
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---- RESULTS
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'Renaming was successful.'
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====
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---- QUERY
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# Test renaming a parquet view
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alter view $DATABASE.parquet_view rename to $DATABASE.new_parquet_view
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---- RESULTS
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'Renaming was successful.'
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====
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---- QUERY
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# Test that the view was renamed
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show tables in $DATABASE
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---- RESULTS
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'drop_tbl_test'
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'complex_view'
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'new_parquet_view'
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'simple_view'
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'view_on_view'
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====
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---- QUERY
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# Alter a view with predicates, joins, aggregates and order by
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alter view $DATABASE.complex_view (aaa comment 'abc', bbb comment 'xyz') as
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select count(a.bigint_col), b.string_col from
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functional.alltypesagg a inner join functional.alltypestiny b
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on a.id = b.id where a.bigint_col < 50
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group by b.string_col having count(a.bigint_col) > 1
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order by b.string_col limit 100
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---- RESULTS
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'View has been altered.'
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====
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---- QUERY
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# Test verifying the description of the altered view
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describe $DATABASE.complex_view
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---- RESULTS
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'aaa','bigint','abc'
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'bbb','string','xyz'
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---- TYPES
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string,string,string
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====
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---- QUERY
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# Test querying the altered view
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select * from $DATABASE.complex_view;
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---- RESULTS
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2,'0'
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2,'1'
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---- TYPES
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bigint,string
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====
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---- QUERY
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# Alter a view on a view
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alter view $DATABASE.view_on_view (foo, bar) as
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select * from $DATABASE.complex_view
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---- RESULTS
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'View has been altered.'
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====
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---- QUERY
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# Test describing the description of the altered view
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describe $DATABASE.view_on_view
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---- RESULTS
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'foo','bigint',''
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'bar','string',''
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---- TYPES
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string,string,string
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====
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---- QUERY
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# Test querying the altered view
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select foo, bar from $DATABASE.view_on_view;
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---- RESULTS
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2,'0'
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2,'1'
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---- TYPES
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bigint,string
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====
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---- QUERY
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# Test altering a with a new definition
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alter view $DATABASE.new_parquet_view as
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select bigint_col, string_col from functional_parquet.alltypesagg
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where bigint_col is null limit 10
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---- RESULTS
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'View has been altered.'
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====
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---- QUERY
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# Test querying the altered view
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select count(bigint_col), count(string_col) from $DATABASE.new_parquet_view
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---- RESULTS
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0,10
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---- TYPES
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bigint,bigint
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====
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---- QUERY
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# Create a view on a constant select and try to query it.
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create view $DATABASE.const_view
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as select 1, 'a', cast(10.0 as float)
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---- RESULTS
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'View has been created.'
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====
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---- QUERY
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select * from $DATABASE.const_view
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---- RESULTS
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1,'a',10
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---- TYPES
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tinyint,string,float
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====
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---- QUERY
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# Test that parentheses are preserved in view creation.
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# If the parentheses were ignored the query would return a count > 0.
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create view $DATABASE.paren_view as
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select count(*) from functional.alltypessmall
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where true and (true or false) and false
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---- RESULTS
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'View has been created.'
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====
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---- QUERY
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# Test that parentheses are preserved in view creation.
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select * from $DATABASE.paren_view
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---- RESULTS
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0
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---- TYPES
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bigint
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====
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---- QUERY
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# Create a view with decimal columns. Regression test for IMPALA-1021.
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create view $DATABASE.decimal_view as
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select * from functional.decimal_tbl
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---- RESULTS
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'View has been created.'
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====
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---- QUERY
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# Query a view with decimal columns. Regression test for IMPALA-1021.
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select * from $DATABASE.decimal_view
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---- RESULTS
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1234,2222,1.2345678900,0.12345678900000000000000000000000000000,12345.78900,1
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12345,333,123.4567890000,0.12345678900000000000000000000000000000,11.22000,1
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12345,333,1234.5678900000,0.12345678900000000000000000000000000000,0.10000,1
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132842,333,12345.6789000000,0.12345678900000000000000000000000000000,0.77889,1
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2345,111,12.3456789000,0.12345678900000000000000000000000000000,3.14100,1
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---- TYPES
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decimal,decimal,decimal,decimal,decimal,decimal
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