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lua-sqlite3-0.4.1/examples/function.lua

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+
+require "path"
+require "sqlite3"
+
+
+local db = sqlite3.open_memory()
+
+assert( db:exec[[
+
+  CREATE TABLE test (col1, col2);
+
+  INSERT INTO test VALUES (1, 2);
+  INSERT INTO test VALUES (2, 4);
+  INSERT INTO test VALUES (3, 6);
+  INSERT INTO test VALUES (4, 8);
+  INSERT INTO test VALUES (5, 10);
+
+]] )
+
+
+assert( db:set_function("my_sum", 2, function(a, b)
+  return a + b
+end))
+
+
+for col1, col2, sum in db:cols("SELECT *, my_sum(col1, col2) FROM test") do
+  print(col1, col2, sum)
+end