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- [x] I have checked the superset logs for python stacktraces and included it
here as text if any
- [x] I have reproduced the issue with at least the latest released version of
superset
- [x] I have checked the issue tracker for the same issue and I haven't found
one similar
- A closed issue seems to be related: #2588 but was closed because inactivity.
### Superset version
Current master: 85692612d6f1438d8b19f51aefae92a240bc3cf3
### Expected results
A table with column name where case is important (for example `invoiceDate`)
should be usable without any problem.
### Actual results
When creating a chart with such a table, I get the following error:
```
column "invoicedate" does not exist LINE 1: SELECT DATE_TRUNC('day',
invoiceDate) AT TIME ZONE 'UTC' AS ... ^ HINT: Perhaps you meant to reference
the column "InvoiceLine.invoiceDate".
```
### Steps to reproduce
Import a table with case-sensitive names.
[ Full content available at:
https://github.com/apache/incubator-superset/issues/5886 ]
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