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Update datatype convert example 340 #2027

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merged 3 commits into from
Mar 23, 2023
Merged

Update datatype convert example 340 #2027

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e19eec5
Update 3.alter-tag.md
abby-cyber Mar 23, 2023
8eb7363
Update 3.alter-tag.md
abby-cyber Mar 23, 2023
d139f68
Merge branch 'v3.4.0' into update-datatype-convert-example-340
abby-cyber Mar 23, 2023
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10 changes: 6 additions & 4 deletions docs-2.0/3.ngql-guide/10.tag-statements/3.alter-tag.md
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Expand Up @@ -10,10 +10,6 @@

- The property name must be unique in a tag. If you add a property with the same name as an existing property or a dropped property, the operation fails.

- Only the length of a `FIXED_STRING` or an `INT` can be increased. The length of a `STRING` or an `INT` cannot be decreased.

- Only the data type conversions from FIXED_STRING to STRING and from FLOAT to DOUBLE are allowed.


## Syntax

Expand All @@ -38,6 +34,12 @@ ttl_definition:

- When a property value is set to `NOT NULL` using `ADD` or `CHANGE`, a default value must be specified for the property, that is, the value of `DEFAULT` must be specified.

- When using `CHANGE` to modify the data type of a property:

- Only the length of a `FIXED_STRING` or an `INT` can be increased. The length of a `STRING` or an `INT` cannot be decreased.

- Only the data type conversions from FIXED_STRING to STRING and from FLOAT to DOUBLE are allowed.

## Examples

```ngql
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