17.00 - Usage Notes - Teradata Database

Teradata Vantageā„¢ - Data Dictionary

prodname
Advanced SQL Engine
Teradata Database
vrm_release
17.00
created_date
June 2020
category
Administration
Programming Reference
featnum
B035-1092-170K

Referenced Columns

Many of the Data Dictionary view columns have referenced table columns. That is, the value in the view column corresponds to a value in the selected column referenced in the table. It would be meaningful to join the view and the referenced table based on the selected column and the referenced column.

Referenced columns for this view are:

View Column Referenced Column
IndexNumber DBC.Indexes.IndexNumber

ColumnName

  • If more than one column or expression is specified, each column or expression is separated by a comma.
  • The maximum number of columns is 64.
  • If expressions are in the list, the maximum number of columns can be reduced past the limit of 64, depending on the combined total size of the text in the expressions.
  • If the combined total size of the expression text causes the maximum column limit to be less than the actual number of columns in the list, an error occurs.

SampleSizePct

If sampling is not used, the SampleSizePct column is set to 0 or 100.

StatsSource

The StatsSource column records the method by which this statistic is acquired. For information about the possible values for the StatsSource column, see "StatsSource Column."