Stefan Miklosovic created CASSANDRA-20331:
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Summary: Expose constraints in system_schema.column_constraints
Key: CASSANDRA-20331
URL: https://issues.apache.org/jira/browse/CASSANDRA-20331
Project: Apache Cassandra
Issue Type: Task
Reporter: Stefan Miklosovic
There is already system_schema.column_masks
{code}
CREATE TABLE system_schema.column_masks (
keyspace_name text,
table_name text,
column_name text,
function_argument_nulls frozen<list<boolean>>,
function_argument_types frozen<list<text>>,
function_argument_values frozen<list<text>>,
function_keyspace text,
function_name text,
PRIMARY KEY (keyspace_name, table_name, column_name)
) WITH CLUSTERING ORDER BY (table_name ASC, column_name ASC)
{code}
We need this table with constraints of each column, similar to masks. Right now
there is no programmatic way to realize what constraints a column has. This
will come handy when Java Driver will start to support this. They will just
scan system_schema.column_constraints and they can e.g. fail the query on
client side it will never reach the server ...
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