gmJoinAVariable

From gmDatabase v0.5.0 by K Gerald van den Boogaart

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.

Documentation reproduced from package gmDatabase, version 0.5.0, License: GPL (>= 2) | LGPL (>= 2)

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