Fix ResultColumnMixin - add table reference for QueryResult (#687)

* Update ResultColumnMixin.kt

QueryResult.table was being hardcoded as `null`, add the table reference so that `queryExposed()` QueryResult.table can be used

Table reference could also be a TableAlias element.

* Update CHANGELOG.md

Author: griffio

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+- Fix ResultColumnMixin - add table reference for QueryResult https://github.com/sqldelight/sql-psi/pull/687
 - In-development snapshots are now published to the Central Portal Snapshots repository at https://central.sonatype.com/repository/maven-snapshots/.
 - Fix unwanted environment log warnings https://github.com/sqldelight/sql-psi/pull/679
 

core/src/main/kotlin/com/alecstrong/sql/psi/core/psi/mixins/ResultColumnMixin.kt

@@ -44,7 +44,7 @@ internal abstract class ResultColumnMixin(
     }
 
     return@lazy queryAvailable.fold(emptyList<QueryResult>()) { left, right ->
-      left + right.copy(table = null, columns = right.columns.filter { !it.hiddenByUsing })
+      left + right.copy(table = right.table, columns = right.columns.filter { !it.hiddenByUsing })
     }
   }