{
  "function": "coalesce",
  "description": "Returns the first non-NULL value from the expression list.<br>This function can take any number of arguments.",
  "variableLenArguments": true,
  "arguments": [ {"arg":"expression1", "syntaxOnly": true},
                 {"arg":"expression2", "syntaxOnly": true},
                 {"arg":"expression", "descOnly": true, "description":"any valid expression or value, irregardless of type."}],
  "examples": [ { "expression":"coalesce(NULL, 2)", "returns":"2"},
                { "expression":"coalesce(NULL, 2, 3)", "returns":"2"},
                { "expression":"coalesce(7, NULL, 3*2)", "returns":"7"},
                { "expression":"coalesce(\"fieldA\", \"fallbackField\", 'ERROR')", "returns":"value of fieldA if it is non-NULL else the value of \"fallbackField\" or the string 'ERROR' if both are NULL"} ]
}