ekuiper-new/docs/sqls/data_types.md

Data types

In XStream, each column or an expression has a related data type. A data type describes (and constrains) the set of values that a column of that type can hold or an expression of that type can produce.

Supported data types

Below is the list of data types supported.

#	Data type	Description
1	bigint	The int type.
2	float	The float type.
3	string	Text values, comprised of Unicode characters.
4	datetime	datatime type - Currently it's NOT supported yet.
5	boolean	The boolean type, the value could be true or false.
6	array	The array type, can be any types from simple data or struct type (#1 - #5, and #7).
7	struct	The complex type. Set of name/value pairs. Values must be of supported data type.

Type conversions

These are the rules governing data type conversions:

• ...