Bolke de Bruin created SPARK-22717:
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Summary: Postgres is assumed to cascade truncate table by default
which is not true
Key: SPARK-22717
URL: https://issues.apache.org/jira/browse/SPARK-22717
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.2.2
Environment: Postgres 8,9,10
Reporter: Bolke de Bruin
The postgres dialect returns True for isCascadingTruncateTable, which is
mentioned to be returned
([https://github.com/apache/spark/blob/d4107196d59638845bd19da6aab074424d90ddaf/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala#L152])
to indicate that it cascades by default. This is not true accoriding to the
documentation[https://www.postgresql.org/docs/9.1/static/sql-truncate.html]
{code}
domino=> truncate domino.info;
ERROR: cannot truncate a table referenced in a foreign key constraint
DETAIL: Table "fix" references "info".
HINT: Truncate table "fix" at the same time, or use TRUNCATE ... CASCADE.
{code}
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