Method USqlStatement():createVirtualTableFromWorkarea()

Creates a virtual table from a used workarea.

:createVirtualTableFromWorkarea( <cnAlias> ) --> cAlias

Alias name or ordinal of the workarea for which a virtual table is created.

The method returns the alias name for the virtual table

The method :createVirtualTableFromWorkarea() creates a virtual table for a used workarea. The virtual table is a projection of the workarea, not a copy. By using the alias name in the FROM clause of any SELECT statement, the data of the workarea can be accessed via SQL. Consequently, data from DBF tables, and csv/txt files (via SDFDBE) can be processed using SQL statements.

This method raises a runtime error if the workarea passed is not used or if the data model of the current workarea can not be mapped to a virtual table.

Note that a virtual table is read-only. Consequently, INSERT/DELETE/REPLACE or ALTER statements are not supported.

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Method USqlStatement():createVirtualTableFromWorkarea() Foundation