ROWID DataType
Description
The rows in heap-organized tables that are native to Oracle Database have row addresses called rowids. You can examine a rowid row address by querying the pseudocolumn ROWID. Values of this pseudocolumn are strings representing the address of each row. These strings have the data type ROWID. You can also create tables and clusters that contain actual columns having the ROWID data type. (Oracle SQL Language Reference ROWID Data Types)
ROWID
Sample Source Patterns
ROWID in Create Table
Oracle
CREATE TABLE rowid_table
(
rowid_column ROWID
);
Snowflake
CREATE OR REPLACE TABLE rowid_table
(
rowid_column VARCHAR(18) !!!RESOLVE EWI!!! /*** SSC-EWI-0036 - ROWID DATA TYPE CONVERTED TO VARCHAR ***/!!!
)
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"oracle"}}'
;
Insert data in the ROWID column
It is possible to insert data in ROWID columns if the insert has a valid ROWID, as shown in the example below. Unfortunately retrieving ROWID from a table is not allowed (see Related EWIs).
Oracle
INSERT INTO rowid_table VALUES ('AAATtCAAMAAAADLABD');
SELECT rowid_column FROM rowid_table;
Snowflake
INSERT INTO rowid_table
VALUES ('AAATtCAAMAAAADLABD');
SELECT rowid_column FROM
rowid_table;
Known Issues
1. Retrieving ROWID from a table that does not have an explicit column with this data type
As mentioned in the Snowflake forum, ROWID is not supported by Snowflake. The following query displays an error in Snowflake since hr.employees do not contain a ROWID column.
Oracle
SELECT
ROWID
FROM
hr.employees
FETCH NEXT 10 ROWS ONLY;
Snowflake
SELECT
--** SSC-FDM-OR0030 - ROWID PSEUDOCOLUMN IS NOT SUPPORTED IN SNOWFLAKE, IT WAS CONVERTED TO NULL TO AVOID RUNTIME ERRORS **
null
FROM
hr.employees
FETCH NEXT 10 ROWS ONLY;
Related EWIs
SSC-EWI-0036: Data type converted to another data type.
SSC-FDM-OR0030: ROWID pseudocolumn is not supported in Snowflake.
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