Cast Functions and Operators¶
The following functions are available in Okera to convert types explicitly between each other (if allowed).
| Function | Description |
|---|---|
casttobigint() |
Casts the specified value to BIGINT |
casttoboolean() |
Casts the specified value to BOOLEAN |
casttochar() |
Casts the specified value to CHAR |
casttodate() |
Casts the specified value to DATE |
casttodecimal() |
Casts the specified value to DECIMAL |
casttodouble() |
Casts the specified value to DOUBLE |
casttofloat() |
Casts the specified value to FLOAT |
casttoint() |
Casts the specified value to INT |
casttosmallint() |
Casts the specified value to SMALLINT |
casttostring() |
Casts the specified value to STRING |
casttotimestamp() |
Casts the specified value to TIMESTAMP |
casttotinyint() |
Casts the specified value to TINYINT |
casttovarchar() |
Casts the specified value to VARCHAR |
These functions are the equivalent to the usual CAST(... AS ...) operator.
For example:
> SELECT typeof(3+7);
SMALLINT
> SELECT typeof(casttoint(3+7));
INT
The first typeof() returns SMALLINT as the implicitly determined data type of the expression result.
The second typeof() returns INT as the explicit casttoint() is changing the SMALLINT to an INT type.
See Data Types for a matrix that shows what data types are allowed to be casted into other types and which.