11. OpenSQL Standard Catalogs : Standard Catalog Interface : The iihistograms Catalog
 
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The iihistograms Catalog
The iihistograms table contains histogram information used by the optimizer.
Column Name
Data Type
Description
table_name
char(256)
The table for the histogram. Must be a valid object name.
table_owner
char(32)
The table owner's user name.
column_name
char(256)
The name of the column.
text_sequence
integer8
The sequence number for the histogram, numbered from 1. There may be several rows in this table, used to order the “text_segment” data when histogram is read into memory.
text_segment
char(228)
The encoded histogram data, created by optimizedb.