Retrieve Linked Data Between RDBES Tables at a Specified Level

The getLinkedDataFromLevel function facilitates the retrieval of linked data between different levels of RDBES tables. Depending on the relative positions of the source and target tables within the RDBESDataObject, the function determines whether to traverse "up" or "down" the data hierarchy to obtain the desired linked data.

Usage

getLinkedDataFromLevel(field, values, rdbesTables, level, verbose = FALSE)

Arguments

field: A character string specifying the field name from which to retrieve linked data. The first two characters of this field indicate the source table.
values: A vector of values corresponding to the specified field for which linked data is to be retrieved.
rdbesTables: An RDBESDataObject containing the relevant RDBES tables. This object should include all tables that may be linked based on the provided field and level.
level: A character string specifying the target table level from which to retrieve linked data. This must be one of the names within the rdbesTables object.
verbose: Logical flag indicating whether to print detailed information about the data retrieval process. Default is FALSE.

Value

The subset of the table at the specified level.

Examples

if (FALSE) { # \dontrun{
# Example 1: Going up in the table hierarchy to retrieve data from the DE table
# Retrieve data from the DE level based on BVid from the BV table
# This returns 1 row from the DE table
getLinkedDataFromLevel("BVid", c(1), H8ExampleEE1, "DE", TRUE)

# Example 2: Going down in the table hierarchy to retrieve data from the SA table
# Retrieve data from the SA level based on DEid from the DE table
# This returns 15 rows from the SA table
getLinkedDataFromLevel("DEid", c(1), H8ExampleEE1, "SA", TRUE)

# Example 3: Going up in the table hierarchy to see the Vessel that caught a specific fish
# Retrieve data from the VS level based on BVfishId from the BV table
getLinkedDataFromLevel("BVfishId", c("410472143", "410472144"), H8ExampleEE1, "VS", TRUE)
} # }