Operators for AddPostProcessing Method
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The following list describes the operators for the IQuery::AddPostProcessing method.
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DBOP_prior_command_tree
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Used when adding post-processing operations. This operator occurs in the post-processing tree but never in a complete command tree. It has either no inputs, or no table- or scalar-valued expressions, depending on the previous command tree.
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DBOP_add_columns
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Used when adding post-processing operations, this operation is the only operation that can add columns "projected away" by earlier operations, such as columns from tables that already participate in the query. The inputs are a table and a projection list; output is a table.