julianhyde commented on a change in pull request #973: [CALCITE-2742] Update
USER and SYSTEM_USER to use DataContext for value
URL: https://github.com/apache/calcite/pull/973#discussion_r287167196
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File path: core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java
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@@ -1951,6 +1952,20 @@ public static TimeZone timeZone(DataContext root) {
return (TimeZone) DataContext.Variable.TIME_ZONE.get(root);
}
+ /** SQL {@code USER} function. */
+ @NonDeterministic
+ public static String user(DataContext root) {
+ return Optional.ofNullable((String) DataContext.Variable.USER.get(root))
+ .orElse("sa");
+ }
+
+ /** SQL {@code SYSTEM_USER} function. */
+ @NonDeterministic
Review comment:
Conceivably (I know it's a stretch) a query could be prepared by one user
and executed by another. The NonDeterministic prevents constant-reduction.
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