gmJoinAVariable
Creating the join R representation of a SQL JOIN
Queries the variable types of the variables, which shall be joined, and creates the R presentation of an SQL JOIN.
- Keywords
- utilities
Usage
gmJoinAVariable(sel,var,nameUse=var,bind=TRUE,db=getOption("gmDB"),selID=attr(sel,"id"))
gmJoinADollarExpr(sel,expr,nameUse,envir,bind=TRUE,db=getOption("gmDB"), gmNameVarID=getGmNameVarID(db))
Arguments
- sel
- The selection statement in R representation.
- var
- R expression of an SQL query.
- nameUse
- the names used for the variables
- envir
- defines the environment used for evaluation of
expr
- bind
- should the variable be bound
- db
- The database connection to the material analysis database.
- selID
- The ID attribute of the selection.
- expr
- An R expression.
- gmNameVarID
- The gmVarID of gmName from the database.
Details
Internals functions for constructing a SQL statement.
Value
-
For
gmJoinADollarExpression
the new selection expression, where the dollar expression is added.
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