Lua driver for Exasol

• Index

Source

• exasol.lua
• Connection.lua
• ConnectionProperties.lua
• Cursor.lua
• CursorData.lua
• Environment.lua
• ExasolWebsocket.lua
• Websocket.lua
• WebsocketDatahandler.lua
• constants.lua
• util.lua
• examples.lua

Modules

• luasql.exasol
• luasql.exasol.constants
• luasql.exasol.util

Classes

• luasql.exasol.Connection
• luasql.exasol.ConnectionProperties
• luasql.exasol.Cursor
• luasql.exasol.CursorData
• luasql.exasol.Environment
• luasql.exasol.ExasolWebsocket
• luasql.exasol.Websocket
• luasql.exasol.WebsocketDatahandler

Examples

• examples.lua

util.lua

--- This internal module contains common utility functions.
-- @module luasql.exasol.util
local util = {}

local ExaError = require("ExaError")

--- Make a table read-only be wrapping it in a proxy that raises an error for modifications.
-- See https://www.lua.org/pil/13.4.5.html for details.
function util.read_only(table)
    local proxy = {}
    local metatable = {
        __index = table,
        __newindex = function(_, key, value)
            ExaError:new("E-EDL-32", "Attempt to update read-only table: tried to set key {{key}} to value {{value}}",
                         {key = key, value = value}):raise(3)
        end
    }
    setmetatable(proxy, metatable)
    return proxy
end

return util