/// <summary>
/// Substitutes any aliased variables in the given expression
/// with the function name equivalent.
/// </summary>
/// <param name="expression"></param>
/// <param name="columns"></param>
/// <remarks>
/// For example, if we have a <c>SELECT 3 + 4 Bah</c> then resolving
/// on variable <i>Bah</i> will be subsituted to the function column
/// that represents the result of <i>3 + 4</i>.
/// </remarks>
private static Expression SubstituteAliasedVariables(Expression expression, IList <SelectColumn> columns)
{
var subs = new VariableSubstitute(columns);
return(subs.Substitute(expression));
}
/// <summary>
/// Substitutes any aliased variables in the given expression
/// with the function name equivalent.
/// </summary>
/// <param name="expression"></param>
/// <param name="columns"></param>
/// <remarks>
/// For example, if we have a <c>SELECT 3 + 4 Bah</c> then resolving
/// on variable <i>Bah</i> will be subsituted to the function column
/// that represents the result of <i>3 + 4</i>.
/// </remarks>
private static Expression SubstituteAliasedVariables(Expression expression, IList<SelectColumn> columns)
{
var subs = new VariableSubstitute(columns);
return subs.Substitute(expression);
}
