[
https://issues.apache.org/jira/browse/CALCITE-505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14538891#comment-14538891
]
Julian Hyde edited comment on CALCITE-505 at 5/11/15 11:44 PM:
---------------------------------------------------------------
Like this:{code}final Map<Integer, RexNode> projectMap = new HashMap<>();
final List<RexNode> filters = new ArrayList<>();
final RexNode constraint =
modifiableView.getConstraint(rexBuilder, delegateRowType);
RelOptUtil.inferViewPredicates(projectMap, filters, constraint);{code}
After executing this code, {{projectMap.get( i )}} will contain a RexLiteral if
column #i is constrained to a constant, null otherwise. You can see a use of
this code in {{SqlToRelConverter#createSource}}.
was (Author: julianhyde):
Like this:{code}final Map<Integer, RexNode> projectMap = new HashMap<>();
final List<RexNode> filters = new ArrayList<>();
final RexNode constraint =
modifiableView.getConstraint(rexBuilder, delegateRowType);
RelOptUtil.inferViewPredicates(projectMap, filters, constraint);{code}
After executing this code, {{projectMap.get(i)}} will contain a RexLiteral if
column #i is constrained to a constant, null otherwise. You can see a use of
this code in {{SqlToRelConverter#createSource}}.
> Support updatable VIEW
> ----------------------
>
> Key: CALCITE-505
> URL: https://issues.apache.org/jira/browse/CALCITE-505
> Project: Calcite
> Issue Type: Sub-task
> Reporter: James Taylor
> Assignee: Julian Hyde
> Labels: phoenix
>
> Phoenix allows updates to occur through a VIEW in certain, simple cases (i.e.
> when the WHERE clause of a VIEW contains only simple equality statements).
> It'd be useful if Calcite allowed for this as well. See
> http://phoenix.apache.org/views.html#Updatable_Views for more information.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
