sadpandajoe commented on code in PR #44955:
URL: https://github.com/apache/superset/pull/44955#discussion_r4190201523


##########
superset-frontend/plugins/plugin-chart-table/src/transformProps.ts:
##########
@@ -237,6 +239,11 @@ const processColumns = memoizeOne(function processColumns(
   const columnsByName = new Map(
     (props.datasource.columns ?? []).map(col => [col.column_name, col]),
   );
+  const normalizedColumnConfig = normalizeColumnConfigKeys(

Review Comment:
   Legacy `column_config.Time` is now remapped at render time here, but I don't 
see a test that goes through `transformProps` (or the ag-grid equivalent) with 
that shape. Take a result with `__timestamp` and `column_config: { Time: { 
customColumnName: 'Date', d3TimeFormat: '%Y' } }`: if this normalization call 
were removed, every added test would still pass while saved charts silently 
lose their settings. Could you add a `transformProps` test asserting the 
`__timestamp` column picks up that config (and the same for ag-grid)?



##########
superset-frontend/plugins/plugin-chart-table/src/controlPanel.tsx:
##########
@@ -701,6 +702,10 @@ const config: ControlPanelConfig = {
                     coltypes,
                     childColumnMap,
                     timeComparisonColumnMap,
+                    knownKeys: getKnownColumnConfigKeys(

Review Comment:
   With time comparison on, `colnames` here has already been expanded to `Main 
Time`, `# Time`, and so on, so an ad hoc metric labelled `Time` is no longer in 
`knownKeys`. Ad hoc metrics also aren't in the datasource metrics list, so a 
saved `Time` entry looks like a legacy `__timestamp` alias. For a chart with 
`__timestamp` plus an ad hoc metric labelled `Time`, editing another column 
would write that metric's `customColumnName` onto `__timestamp` and rename the 
date column. Should `knownKeys` be built from the original query column names 
before the comparison expansion (same in the ag-grid panel)?



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