Gabor Kaszab created IMPALA-12729:
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Summary: Allow creating primary keys for Iceberg tables
Key: IMPALA-12729
URL: https://issues.apache.org/jira/browse/IMPALA-12729
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Reporter: Gabor Kaszab
Some writer engines require primary keys on a table so that they can use them
for writing equality deletes (only the PK cols are written to the eq-delete
files).
Impala currently doesn't reject setting PKs for Iceberg tables, however it
seems to omit them. This suceeds:
{code:java}
create table ice_pk (i int, j int, primary key(i)) stored as iceberg;
{code}
However, DESCRIBE EXTENDED doesn't show 'identifier-field-ids' in the
'current-schema'.
On the other hand for a table created by Flink these fields are there:
{code:java}
current-schema |
{\"type\":\"struct\",\"schema-id\":0,\"identifier-field-ids\":[1],\"fields\":[{\"id\":1,\"name\":\"i\",\"required\":true,\"type\":\"int\"},{\"id\":2,\"name\":\"s\",\"required\":false,\"type\":\"string\"}]}
{code}
Part2:
SHOW CREATE TABLE should also correctly print the primary key part of the field
list.
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