This change adds support for adding SORT BY (...) clauses to CREATE
TABLE and ALTER TABLE statements. Examples are:
CREATE TABLE t (i INT, j INT, k INT) PARTITIONED BY (l INT) SORT BY (i, j);
CREATE TABLE t SORT BY (int_col,id) LIKE u;
CREATE TABLE t LIKE PARQUET '/foo' SORT BY (id,zip);
ALTER TABLE t SORT BY (int_col,id);
ALTER TABLE t SORT BY ();
Sort columns can only be specified for Hdfs tables and effectiveness may
vary based on storage type; for example TEXT tables will not see
improved compression. The SORT BY clause must not contain clustering
columns. The columns in the SORT BY clause are stored in the
'sort.columns' table property and will result in an additional SORT node
being added to the plan before the final table sink. Specifying sort
columns also enables clustering during inserts, so the SORT node will
contain all partitioning columns first, followed by the sort columns. We
do this because sort columns add a SORT node to the plan and adding the
clustering columns to the SORT node is cheap.
Sort columns supersede the sortby() hint, which we will remove in a
subsequent change (IMPALA-5144). Until then, it is possible to specify
sort columns using both ways at the same time and the column lists
will be concatenated.
Change-Id: I08834f38a941786ab45a4381c2732d929a934f75
Reviewed-on: http://gerrit.cloudera.org:8080/6495
Reviewed-by: Lars Volker <lv@cloudera.com>
Tested-by: Impala Public Jenkins
For a table that has both a table comment and a partition specified,
"show create table" incorrectly outputs the comment before the partition.
This is not the correct order, and it results in an invalid SQL.
This transaction fixes the ordering (partition comes before comment) and
adds tests for this case.
Change-Id: I29a33cfd142b473997fdc3acfe3f0966bc7ed784
Reviewed-on: http://gerrit.cloudera.org:8080/5648
Tested-by: Impala Public Jenkins
Reviewed-by: Henry Robinson <henry@cloudera.com>
This commit fixes an issue where a SHOW CREATE VIEW statement throws an
analysis error if the view contains a subquery.
Change-Id: I4a89e46a022f0ccec198b6e3e2b30230103831ce
Reviewed-on: http://gerrit.cloudera.org:8080/5333
Reviewed-by: Dimitris Tsirogiannis <dtsirogiannis@cloudera.com>
Tested-by: Internal Jenkins
SHOW CREATE TABLE already outputs information for views. As a
convenience, this patch adds SHOW CREATE VIEW as an alias for SHOW
CREATE TABLE.
Switch some SHOW CREATE VIEW tests to use SHOW CREATE VIEW and add
additional test for SHOW CREATE VIEW on a table so that expected
behaviour is tested.
Change-Id: I9925e0789573e9b097a2ef52b5023964dcf8f32c
Reviewed-on: http://gerrit.cloudera.org:8080/1661
Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com>
Tested-by: Internal Jenkins
This changes implements support for PARTITIONED BY clauses in CTAS
statements. The syntax and semantics follow the PARTITION feature of
insert from select statements: inside the PARTITIONED BY (...) column
list the user must specify names of the columns to partition by. These
column names must appear in that particular order at the end of the
select statement. A remapping between columns of the source and
destination tables is not possible, because the destination table does
not yet exist. Specifying static values for the partition columns is
also not possible, as their type needs to be deduced from columns in the
select statement. Example:
CREATE TABLE t (a DOUBLE, b INT);
INSERT INTO t VALUES (1.5, 3);
CREATE TABLE p PARTITIONED BY (b) AS SELECT a, b FROM t;
This change also contains a fix for setting the PYTHONPATH environment
variable correctly, so you can run single python tests from the command
line.
Change-Id: I5f61854d36d1ee30cfcd1c6b2b3eb971f6cf4b2f
Reviewed-on: http://gerrit.cloudera.org:8080/1740
Reviewed-by: Lars Volker <lv@cloudera.com>
Tested-by: Internal Jenkins
SHOW CREATE TABLE now supports views. It returns a CREATE VIEW statement
with column names and the original sql statement.
Authorization allows SHOW CREATE TABLE to be run on view if the user has
VIEW_METADATA privilege on the view and SELECT privilege on all
underlying views and table.
E.g. "SHOW CREATE TABLE some_view" returns output of form:
CREATE VIEW a_database.some_view (id, bool_col, tinyint_col) AS
SELECT id, bool_col, tinyint_col FROM functional.alltypes
Change-Id: Id633af2f5c1f5b0e01c13ed85c4bf9c045dc0666
Reviewed-on: http://gerrit.cloudera.org:8080/713
Reviewed-by: Alex Behm <alex.behm@cloudera.com>
Tested-by: Internal Jenkins
Additionally, this patch also disabled the hbase/none test dimension if the
TARGET_FILESYSTEM environment variable is set to either s3 of isilon.
Change-Id: I63aecaa478d2ba9eb68de729e9640071359a2eeb
Reviewed-on: http://gerrit.cloudera.org:8080/74
Reviewed-by: Dan Hecht <dhecht@cloudera.com>
Tested-by: Internal Jenkins
This change updates our DDL syntax support to allow for using 'STORED AS PARQUET'
as well as 'STORED AS PARQUETFILE'. Moving forward we should prefer the new syntax,
but continue to support the old. I made the same change for 'AVROFILE', but since
we have not yet documented the 'AVROFILE' syntax I left out support for the old syntax.
Change-Id: I10c73a71a94ee488c9ae205485777b58ab8957c9
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1053
Reviewed-by: Marcel Kornacker <marcel@cloudera.com>
Tested-by: jenkins
Adds support for "show create table", a DDL statement that outputs a DDL statement that
creates the specified table.
In general, the output DDL works in Impala, so a user can copy the output and execute it
to create the same table. However, there are a few special cases that output Hive DDL
because we do not support creating some tables in Impala: HBase tables and tables with
LZO compressed text. When we do support creating these tables in Impala, users should
be able to execute the DDL in Impala as well.
Change-Id: I8c130297a657810dea5b994bf99d72b0e61b847b
Reviewed-on: http://gerrit.ent.cloudera.com:8080/842
Reviewed-by: Matthew Jacobs <mj@cloudera.com>
Tested-by: Matthew Jacobs <mj@cloudera.com>
