Containers and Autocompression - Teradata Vantage

A container with autocompression includes the following:

• 2 bytes are used as an offset to the compression bits.
• 1 or more bytes indicate the autocompression types and their arguments for the container.
• 1 or more bytes of autocompression bits, depending on the number of column partition values and the autocompression type.
• 0 or more bytes are used for a local value-list dictionary.
• 0 or more bytes are used for present column partition values.

A container without autocompression uses 0 or more bytes for present column partition values. A container can exist without autocompression because:

• You specified NO AUTO COMPRESS for the column partition when you created the table or join index.
• No autocompression types are applicable for the column partition values of the container.