In earlier version of database, before Teradata 14, the max value for maxvaluelength was 16 bytes/ character; from Teradata 14, the default is 25 bytes to max histogram size (64 K). Below table compares two options.
| Syntax element |
Reason
|
|
MAXVALUELENGTH n |
The maximum value length for histogram values such as MinValue, ModeValue, MaxValue, BiasedValue, and so on. For single-column statistics with CHAR or VARCHAR type columns, the size is taken as the number of characters. For single-column statistics with non-character type columns and multi-column statistics, the size is taken as the number of bytes. For multi-column statistics, the values are concatenated and truncated to the specified maximum size. The valid range ... |
