Manages global access to a table's data. By default a table has a input parameter lock_type of read_write, indicating all operations are permitted. A user may request a read_only or a write_only lock, after which only read or write operations, respectively, are permitted on the table until the lock is removed. When input parameter lock_type is no_access then no operations are permitted on the table. The lock status can be queried by setting input parameter lock_type to status.

Input Parameter Description

Name Type Description
table_name string Name of the table to be locked, in [schema_name.]table_name format, using standard name resolution rules. It must be a currently existing table or view.
lock_type string

The type of lock being applied to the table. Setting it to status will return the current lock status of the table without changing it. The default value is status.

Supported Values Description
status Show locked status
no_access Allow no read/write operations
read_only Allow only read operations
write_only Allow only write operations
read_write Allow all read/write operations
options map of string to strings Optional parameters. The default value is an empty map ( {} ).

Output Parameter Description

The GPUdb server embeds the endpoint response inside a standard response structure which contains status information and the actual response to the query. Here is a description of the various fields of the wrapper:

Name Type Description
status String 'OK' or 'ERROR'
message String Empty if success or an error message
data_type String 'lock_table_response' or 'none' in case of an error
data String Empty string
data_str JSON or String

This embedded JSON represents the result of the /lock/table endpoint:

Name Type Description
lock_type string Returns the lock state of the table.
info map of string to strings Additional information.

Empty string in case of an error.