skyyws 5b720a4d18
IMPALA-10164: Supporting HadoopCatalog for Iceberg table ...
This patch mainly realizes creating Iceberg table by HadoopCatalog.
We only supported HadoopTables api before this patch, but now we can
use HadoopCatalog to create Iceberg table. When creating managed table,
we can use SQL like this:
CREATE TABLE default.iceberg_test (
level string,
event_time timestamp,
message string,
)
STORED AS ICEBERG
TBLPROPERTIES ('iceberg.catalog'='hadoop.catalog',
'iceberg.catalog_location'='hdfs://test-warehouse/iceberg_test');
We supported two values ('hadoop.catalog', 'hadoop.tables') for
'iceberg.catalog' now. If you don't specify this property in your SQL,
default catalog type is 'hadoop.catalog'.
As for external Iceberg table, you can use SQL like this:
CREATE EXTERNAL TABLE default.iceberg_test_external
STORED AS ICEBERG
TBLPROPERTIES ('iceberg.catalog'='hadoop.catalog',
'iceberg.catalog_location'='hdfs://test-warehouse/iceberg_test',
'iceberg.table_identifier'='default.iceberg_test');
We cannot set table location for both managed and external Iceberg
table with 'hadoop.catalog', and 'SHOW CREATE TABLE' will not display
table location yet. We need to use 'DESCRIBE FORMATTED/EXTENDED' to
get this location info.
'iceberg.catalog_location' is necessary for 'hadoop.catalog' table,
which used to reserved Iceberg table metadata and data, and we use this
location to load table metadata from Iceberg.
'iceberg.table_identifier' is used for Icebreg TableIdentifier.If this
property not been specified in SQL, Impala will use database and table name
to load Iceberg table, which is 'default.iceberg_test_external' in above SQL.
This property value is splitted by '.', you can alse set this value like this:
'org.my_db.my_tbl'. And this property is valid for both managed and external
table.
Testing:
- Create table tests in functional_schema_template.sql
- Iceberg table create test in test_iceberg.py
- Iceberg table query test in test_scanners.py
- Iceberg table show create table test in test_show_create_table.py
Change-Id: Ic1893c50a633ca22d4bca6726c9937b026f5d5ef
Reviewed-on: http://gerrit.cloudera.org:8080/16446
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com >
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com >
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