Data transfer in a computer-implemented database

A system comprising:

• at least one programmable processor;
• and
• a non-transitory machine-readable medium storing instructions that, when executed by the at least one programmable processor, cause the at least one programmable processor to perform operations comprising:
• receiving, at a data server associated with a database, a command for a data transfer of a data table that includes a plurality of columns including a first column and a second column, the data transfer between a client machine and the data server over a communications network, wherein metadata associated with the data table designates that first data associated with the first column is not allowed to be transferred in response to the command for the data transfer of the data table and the metadata further designates that second data associated with the second column is allowed to be transferred in response to the command for the data transfer of the data table;
• in response to receiving the command for the data transfer of the data table, determining, based on the metadata, whether the plurality of columns including the first column and the second column of the data table have been designated to allow or not allow the data transfer;
• and
• in response to the determining, executing the command for the data transfer of the data table according to the columns designated to allow the data transfer, such that at least the second data associated with the second column is transferred in response to the command.

A non-transitory machine-readable medium storing instructions that, when executed by at least one programmable processor, cause the at least one programmable processor to perform operations comprising:

• receiving, at a data server associated with a database, a command for a data transfer of a data table that includes a plurality of columns including a first column and a second column, the data transfer between a client machine and the data server over a communications network, wherein metadata associated with the data table designates that first data associated with the first column is not allowed to be transferred in response to the command for the data transfer of the data table and the metadata further designates that second data associated with the second column is allowed to be transferred in response to the command for the data transfer of the data table;
• in response to receiving the command for the data transfer of the data table, determining, based on the metadata, whether the plurality of columns including the first column and the second column of the data table have been designated to allow or not allow the data transfer;
• and
• in response to the determining, executing the command for the data transfer of the data table according to the columns designated to allow the data transfer, such that at least the second data associated with the second column is transferred in response to the command.