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Missing values are represented by the special value NULL. To import data with NULL fields, check documentation of the SerDe used by the table. (The default Text Format uses LazySimpleSerDe which interprets the string \N as NULL when importing.)
Allowed Implicit Conversions
| void | boolean | tinyint | smallint | int | bigint | float | double | decimal | string | varchar | timestamp | date | binary |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
void to | true | true | true | true | true | true | true | true | true | true | true | true | true | true |
boolean to | false | true | false | false | false | false | false | false | false | false | false | false | false | false |
tinyint to | false | false | true | true | true | true | true | true | true | true | true | false | false | false |
smallint to | false | false | false | true | true | true | true | true | true | true | true | false | false | false |
int to | false | false | false | false | true | true | true | true | true | true | true | false | false | false |
bigint to | false | false | false | false | false | true | true | true | true | true | true | false | false | false |
float to | false | false | false | false | false | false | true | true | true | true | true | false | false | false |
double to | false | false | false | false | false | false | false | true | true | true | true | false | false | false |
decimal to | false | false | false | false | false | false | false | false | true | true | true | false | false | false |
string to | false | false | false | false | false | false | false | true | true | true | true | false | false | false |
varchar to | false | false | false | false | false | false | false | true | true | true | true | false | false | false |
timestamp to | false | false | false | false | false | false | false | false | false | true | true | true | false | false |
date to | false | false | false | false | false | false | false | false | false | true | true | false | true | false |
binary to | false | false | false | false | false | false | false | false | false | false | false | false | false | true |