[jira] [Created] (CALCITE-2713) JDBC adapter may generate casts on PostgreSQL for VARCHAR type exceeding max length

["Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org>]

Jesus Camacho Rodriguez created CALCITE-2713:
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             Summary: JDBC adapter may generate casts on PostgreSQL for VARCHAR type exceeding max length
                 Key: CALCITE-2713
                 URL: https://issues.apache.org/jira/browse/CALCITE-2713
             Project: Calcite
          Issue Type: Bug
          Components: jdbc-adapter
            Reporter: Jesus Camacho Rodriguez
            Assignee: Jesus Camacho Rodriguez


Varchar length in PostgreSQL cannot exceed 10485760, however Calcite may generate a cast with length larger than that number, resulting in an exception.
{noformat}
org.postgresql.util.PSQLException: ERROR: length for type varchar cannot exceed 10485760
{noformat}

From {{htup_details.h}} in postgresql:
{noformat}
* MaxAttrSize is a somewhat arbitrary upper limit on the declared size of
* data fields of char(n) and similar types.  It need not have anything
* directly to do with the *actual* upper limit of varlena values, which
* is currently 1Gb (see TOAST structures in postgres.h).  I've set it
* at 10Mb which seems like a reasonable number --- tgl 8/6/00. */
{noformat}



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