column_names            Return column names
columns_used            Return columns used
count_null_cols         Count NULLs per row for given column set.
dbi_copy_to             Local table to DBI data source.
dbi_table               DBI data source.
execute                 Execute a operator tree, either bringing back
                        the result or landing it as a table.
extend_nse              Extend data by adding more columns.
extend_se               Extend data by adding more columns.
if_else_block           Simulate a per-row block-'if(){}else{}'.
mark_null_cols          Indicate NULLs per row for given column set.
materialize             Materialize an optree as a table.
materialize_node        Create a materialize node.
natural_join            Make a natural_join node.
non_sql_node            Wrap a non-SQL node.
orderby                 Make an orderby node (not a relational
                        operation).
project_nse             project data by grouping, and adding aggregate
                        columns.
project_se              project data by grouping, and adding aggregate
                        columns.
rename_columns          Make a rename columns node (not a relational
                        operation).
replace_null_cols       Replace or COALESCE out NULLs per row for given
                        column set.
rquery                  'rquery': Relational Query Generator for Data
                        Manipulation
rquery_apply_to_data_frame
                        Execture optree in an enviroment where d is the
                        only data.
rquery_db_info          Build a db information stand-in
rsummary                Compute usable summary of columns of remote
                        table.
rsummary_node           Create an rsumary relop operator node.
select_columns          Make a select columns node (not a relational
                        operation).
select_rows_nse         Make a select rows node.
select_rows_se          Make a select rows node.
sql_node                Make a general SQL node.
table_source            Table data source.
tables_used             Return vector of table names used.
theta_join_nse          Make a theta_join node.
theta_join_se           Make a theta_join node.
to_sql                  Return SQL implementation of operation tree.
tokenize_for_SQL        Cross-parse from an R parse tree into SQL.
wrapr_function.relop    Execute pipeline treating pipe_left_arg as
                        local data to be copied into database.
