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# TDS Foreign data wrapper
* **Author:** Geoff Montee
* **Name:** tds_fdw
* **File:** tds_fdw/Variables.md
## Variables
### Available Variables
* *tds_fdw.show_before_row_memory_stats* - print memory context stats to the PostgreSQL log before each row is fetched.
* *tds_fdw.show_after_row_memory_stats* - print memory context stats to the PostgreSQL log after each row is fetched.
* *tds_fdw.show_finished_memory_stats* - print memory context stats to the PostgreSQL log when a query is finished.
### Setting Variables
To set a variable, use the [SET command](https://www.postgresql.org/docs/12/sql-set.html). i.e.:
```
postgres=# SET tds_fdw.show_finished_memory_stats=1;
SET
```
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