SHALLOW CLONE Command¶
Delta Lake supports SHALLOW CLONE clause in CREATE TABLE
and REPLACE TABLE
statements.
cloneTableHeader SHALLOW CLONE source temporalClause?
(TBLPROPERTIES tableProps)?
(LOCATION location)?
cloneTableHeader
: createTableHeader
| replaceTableHeader
;
createTableHeader
: CREATE TABLE (IF NOT EXISTS)? table
;
replaceTableHeader
: (CREATE OR)? REPLACE TABLE table
;
temporalClause
: FOR? (SYSTEM_VERSION | VERSION) AS OF version
| FOR? (SYSTEM_TIME | TIMESTAMP) AS OF timestamp
;
SHALLOW CLONE
becomes a CloneTableStatement logical operator in a logical query plan that is resolved to a CreateDeltaTableCommand.