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https://issues.apache.org/jira/browse/PHOENIX-3347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15547105#comment-15547105
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Eric Lomore edited comment on PHOENIX-3347 at 10/5/16 12:12 AM:
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{code}public boolean isFromRequired()
Whether FROM clause is required in a SELECT statement.
True in ORACLE_10, STRICT_92, STRICT_99, STRICT_2003; false otherwise.{code}
Switching to any of these 3 should work as there are no other changes except
this (the fix passes 3 additional test cases as it should)
DEFAULT
PRAGMATIC_99
PRAGMATIC_2003
http://calcite.apache.org/apidocs/org/apache/calcite/sql/validate/SqlConformance.html
[~maryannxue], with your blessing, can I proceed with a quick patch to change
conformance to DEFAULT or one of the others if that's preferred? Thanks!
was (Author: lomoree):
{code}public boolean isFromRequired()
Whether FROM clause is required in a SELECT statement.
True in ORACLE_10, STRICT_92, STRICT_99, STRICT_2003; false otherwise.{code}
Switching to any of these 3 should work as there are no other changes except
this.
DEFAULT
PRAGMATIC_99
PRAGMATIC_2003
http://calcite.apache.org/apidocs/org/apache/calcite/sql/validate/SqlConformance.html
[~maryannxue], with your blessing, can I proceed with a quick patch to change
conformance to DEFAULT or one of the others if that's preferred? Thanks!
> Change conformance or remove SELECT statements without FROM clauses
> -------------------------------------------------------------------
>
> Key: PHOENIX-3347
> URL: https://issues.apache.org/jira/browse/PHOENIX-3347
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: Eric Lomore
> Assignee: Eric Lomore
>
> Current conformance settings do not allow SELECT statements without a FROM
> clause. Either need to change conformance or stop supporting SELECT without
> FROM as Phoenix currently does.
> According to the Calcite parser,
> {{FROM is mandatory in standard SQL, optional in dialects such as MySQL,
> PostgreSQL. The parser allows SELECT without FROM, but the validator fails if
> conformance is, say, STRICT_2003.}}
> Based on PhoenixCalciteEmbeddedDriver.java, we are using ORACLE_10
> conformance which does not support this
> {code}setPropertyIfNotSpecified(
> info2,
> CalciteConnectionProperty.CONFORMANCE.camelName(),
> SqlConformance.ORACLE_10.toString()){code}
> Confirming this is the fact that it is specifically the SqlValidator throwing
> the exception in relevant test cases
> {{Caused by: org.apache.calcite.sql.validate.SqlValidatorException: SELECT
> must have a FROM clause}}
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