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system.data_skipping_indices

docs/en/operations/system-tables/data_skipping_indices.md

26.4.1.1-new1014 B
Original Source

Contains information about existing data skipping indices in all the tables.

Columns:

<!--AUTOGENERATED_START--> <!--AUTOGENERATED_END-->

Example

sql
SELECT * FROM system.data_skipping_indices LIMIT 2 FORMAT Vertical;
text
Row 1:
──────
database:                default
table:                   user_actions
name:                    clicks_idx
type:                    minmax
type_full:               minmax
expr:                    clicks
creation:                Explicit
granularity:             1
data_compressed_bytes:   58
data_uncompressed_bytes: 6
marks_bytes:             48

Row 2:
──────
database:                default
table:                   users
name:                    contacts_null_idx
type:                    minmax
type_full:               minmax
expr:                    assumeNotNull(contacts_null)
creation:                Explicit
granularity:             1
data_compressed_bytes:   58
data_uncompressed_bytes: 6
marks_bytes:             48