65
address = grp.create({
datatype = dt.bool,
name = 'My second object',
})
Database functions
SQLite v3 is used as the database engine.
Note: Database tables must be prefixed with unique application name to minimize collisions
between different applications.
Core functions
• db:execute(query) executes given query, return value can be either a database cursor
or query result
• db:escape(value) escapes given string value so it can be safely used in a query
• db:query(query, executes given query, question marks in the query are replaced by
additional parameters (see examples below)
INSERT/UPDATE/DELETE helpers
Note: Lua tables passed as values and where parameters must not have fields that are not
present in given database table. Otherwise query will fail
• db:insert(tablename, values) performs INSERT query based on given values
• db:update(tablename, values, where) performs UPDATE query based on given values
and where parameters
• db:delete(tablename, where) performs DELETE query based on where parameter
SELECT helpers
Note: parameters must be passed in the same way as for db:query() function
• returns first field value from the first matching row from given
query
• returns first matching row from given query
• returns complete query result as Lua table, where each table item
is first field from each row
• returns complete query result as Lua table, where each table item
is Lua table with fieldvalue mapping
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