All functions |
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Execute an ordered sequence of left joins. |
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Implement an affine transformaton |
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Execute pipeline treating pipe_left_arg as local data to be copied into database. |
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Apply pipeline to a database. |
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S4 dispatch method for apply_right. |
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S4 dispatch method for apply_right. |
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Data arrow |
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Assign a value to a slice of data (set of rows meeting a condition, and specified set of columns). |
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Build a join plan. |
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Return column names |
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Return columns used |
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Hyderdrive (science fiction show) synonym for |
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Complete an experimental design. |
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Convert a series of simple objects (from YAML deserializaton) to an rquery pipeline. |
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Count NULLs per row for given column set. |
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Construct a table description from a database source. |
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Build a nice description of a table. |
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Make a drop columns node (not a relational operation). |
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Execute a wrapped execution pipeline. |
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Execute an operator tree, bringing back the result to memory. |
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Cross product vectors in database. |
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Extend data by adding more columns. |
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Extend data by adding more columns. |
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Format a single node for printing. |
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Get a database connection option. |
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Build a draw-able specification of the join diagram |
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Build a sequence of statements simulating an if/else block- |
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Build a |
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check that a join plan is consistent with table descriptions. |
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Return all columns as guess of preferred primary keys. |
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Return all primary key columns as guess at preferred primary keys for a PostgreSQL handle. |
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Return all primary key columns as guess at preferred primary keys for a SQLite handle. |
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Construct a table description of a local data.frame. |
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Use one column to pick values from other columns. |
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Make a list of assignments, applying many functions to many columns. |
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Remap values in a set of columns. |
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Indicate NULLs per row for given column set. |
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Materialize an optree as a table. |
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Create a materialize node. |
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Make a table description directly. |
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Make a natural_join node. |
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Wrap a non-SQL node. |
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Build an optree pipeline that normalizes a set of columns so each column sums to one in each partition. |
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Create a null_replace node. |
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Build a diagram of a optree pipeline. |
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Make a order_expr node. |
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Make a order_expr node. |
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Make an orderby node (not a relational operation). |
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Make an orderby node (not a relational operation). |
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Build an optree pipeline that selects up to the top k rows from each group in the given order. |
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pre_sql_sub_expr |
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project data by grouping, and adding aggregate columns. |
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project data by grouping, and adding aggregate columns. |
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Compute quantiles of specified columns (without interpolation, needs a database with window functions). |
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Compute quantiles over non-NULL values (without interpolation, needs a database with window functions). |
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Quote an identifier. |
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Quote a value |
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Quote a string |
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Quote a table name. |
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Make a rename columns node (copies columns not renamed). |
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Build an optree pipeline counts rows. |
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List table column names. |
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Get column types by example values as a data.frame. |
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Get advice for a DB connection (beyond tests). |
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Build a canonical name for a db connection class. |
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Try and test database for some option settings. |
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Copy local R table to remote data handle. |
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Execute a query, typically an update that is not supposed to return results. |
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Execute a get query, typically a non-update that is supposed to return results. |
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Get head of db table |
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Count rows and return as numeric |
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Remove table |
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Check if a table exists. |
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Execute optree in an environment where d is the only data. |
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Build a db information stand-in |
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An example |
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Quick look at remote data |
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Compute usable summary of columns of remote table. |
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Create an rsumary relop operator node. |
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Make a select columns node (not a relational operation). |
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Make a select rows node. |
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Make a select rows node. |
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Set a database connection option. |
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Set a database connection option. |
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Make a set indicator node. |
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Build a query that applies a SQL expression to a set of columns. |
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Make a general SQL node. |
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Return vector of table names used. |
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Make a theta_join node. |
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Make a theta_join node. |
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Return SQL implementation of operation tree. |
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Convert an rquery op diagram to a simple representation, appropriate for conversion to YAML. |
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Topologically sort join plan so values are available before uses. |
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Make an unionall node (not a relational operation). |
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Wrap a data frame for later execution. |