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String aliases are preserved #3820

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Oct 6, 2018
Merged

String aliases are preserved #3820

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38 changes: 27 additions & 11 deletions v2.1/string.md
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Original file line number Diff line number Diff line change
Expand Up @@ -68,13 +68,11 @@ The size of a `STRING` value is variable, but it's recommended to keep values un
~~~

~~~
+-------------+-----------+-------------+----------------+-----------------------+-------------+
| column_name | data_type | is_nullable | column_default | generation_expression | indices |
+-------------+-----------+-------------+----------------+-----------------------+-------------+
| a | STRING | false | NULL | | {"primary"} |
| b | STRING(4) | true | NULL | | {} |
| c | STRING | true | NULL | | {} |
+-------------+-----------+-------------+----------------+-----------------------+-------------+
column_name | data_type | is_nullable | column_default | generation_expression | indices | is_hidden
+-------------+-----------+-------------+----------------+-----------------------+-------------+-----------+
a | STRING | false | NULL | | {"primary"} | false
b | STRING(4) | true | NULL | | {} | false
c | STRING | true | NULL | | {} | false
(3 rows)
~~~

Expand All @@ -89,11 +87,29 @@ The size of a `STRING` value is variable, but it's recommended to keep values un
~~~

~~~
a | b | c
+----------+------+--------+
| a | b | c |
+----------+------+--------+
| a1b2c3d4 | e5f6 | g7h8i9 |
+----------+------+--------+
a1b2c3d4 | e5f6 | g7h8i9
(1 row)
~~~

{% include copy-clipboard.html %}
~~~ sql
> CREATE TABLE aliases (a STRING PRIMARY KEY, b VARCHAR, c CHAR);
~~~

{% include copy-clipboard.html %}
~~~ sql
> SHOW COLUMNS FROM aliases;
~~~

~~~
column_name | data_type | is_nullable | column_default | generation_expression | indices | is_hidden
+-------------+-----------+-------------+----------------+-----------------------+-------------+-----------+
a | STRING | false | NULL | | {"primary"} | false
b | VARCHAR | true | NULL | | {} | false
c | CHAR | true | NULL | | {} | false
(3 rows)
~~~

## Supported casting and conversion
Expand Down