![]() You can qualify DROP COLUMN with one of these options: Sets or drops a setting for a column of a scalar data type (not ROW), as follows:ĭROP column See Constraints in the Administrator's Guide. ALL PROJECTIONS adds the column to all projections of this table, excluding projections with pre-aggregated data.Īdds a constraint to a table that does not have any associated projections.The projection list cannot include projections with pre-aggregated data such as live aggregate projections otherwise, Vertica rolls back the ALTER TABLE statement. Vertica adds the column to all buddies of each projection. PROJECTIONS adds the new column to one or more existing projections of this table, specified as a comma-delimted list of projection base names.ENCODING specifies the column's encoding type, by default set to AUTO.column‑constraint specifies a column constraint as follows:.You can qualify the new column definition with one of these options: If you omit this option and column exists, Vertica generates a ROLLBACK error message. The optional clause IF NOT EXISTS generates an informational message if column already exists under the specified name. part_log WHERE event_time > ( now () - toIntervalHour ( 24 )) GROUP BY m, database, table ORDER BY database ASC, table ASC, m ASC WITH 30 * 60 AS frame_size SELECT toStartOfInterval ( event_time, toIntervalSecond ( frame_size )) AS m, database, table, ROUND ( countIf ( event_type = 'NewPart' ) / frame_size, 2 ) AS inserts_per_sec, ROUND ( sumIf ( rows, event_type = 'NewPart' ) / frame_size, 2 ) AS rows_per_sec, ROUND ( sumIf ( size_in_bytes, event_type = 'NewPart' ) / frame_size, 2 ) AS bytes_per_sec FROM system. WITH 30 * 60 AS frame_size SELECT toStartOfInterval ( event_time, toIntervalSecond ( frame_size )) AS m, database, table, ROUND ( countIf ( event_type = 'NewPart' ) / frame_size, 2 ) AS new, ROUND ( countIf ( event_type = 'MergeParts' ) / frame_size, 2 ) AS merge, ROUND ( countIf ( event_type = 'DownloadPart' ) / frame_size, 2 ) AS dl, ROUND ( countIf ( event_type = 'RemovePart' ) / frame_size, 2 ) AS rm, ROUND ( countIf ( event_type = 'MutatePart' ) / frame_size, 2 ) AS mut, ROUND ( countIf ( event_type = 'MovePart' ) / frame_size, 2 ) AS mv FROM system. SPARSE_HASHED VS HASHED vs HASHED_ARRAY.Dictionary on the top of several tables using VIEW.Clickhouse Function/Engines/Settings Report.Possible issues with running ClickHouse in k8s. ![]()
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