sql
The SQL library allows you to access powerful database software included with Garry's Mod. It is the preferred and fastest method of storing large amounts of data. The database is located in sv.db serverside and cl.db clientside, both in the Garry's Mod base folder. SQL is a whole scripting language in itself although relatively simple, it's something you'll need to read up on before using this library.
Example of using sql.
-- Creating a table
sql.Query("CREATE TABLE my_db_table( id NUMBER , name TEXT )" )
-- Inserting a value to the table
sql.Query("INSERT INTO my_db_table( id , name ) VALUES( 1 , 'First') ")
-- Printing the tables data
PrintTable( sql.Query("SELECT * FROM my_db_table ") )
-- Deleting the table
sql.Query("DROP TABLE my_db_table")
Known GMod SQL settings:
- Temp files are stored in memory (
SQLITE_TEMP_STORE = 3) - No
ATTACHandDETACHoperations (SQLITE_OMIT_ATTACH = 1) - No Virtual Tables (
SQLITE_OMIT_VIRTUALTABLE = 1) - No
VACUUMoperation (SQLITE_OMIT_VACUUM = 1) - No
LIMITandORDER BYclauses inDELETEandUPDATEstatements (SQLITE_ENABLE_UPDATE_DELETE_LIMIT)
Methods
sql.Begin()
Tells the engine a set of queries is coming. Will wait until sql.Commit is called to run them.
This is most useful when you run more than 100+ queries.
This is equivalent to :
sql.Query( "BEGIN;" )
sql.Commit()
Tells the engine to execute a series of queries queued for execution, must be preceded by sql.Begin.
This is equivalent to sql.Query( "COMMIT;" ).
boolean sql.IndexExists( string indexName )
Returns true if the index with the specified name exists.
table sql.Query( string query )
Performs a query on the local SQLite database, returns a table as result set, nil if result is empty and false on error.
table sql.QueryRow( string query, number row = 1 )
Performs the query like sql.Query, but returns the first row found.
Basically equivalent to :
sql.Query( "*query* LIMIT 1;" )
string sql.QueryValue( string query )
Performs the query like sql.QueryRow, but returns the first value found.
string sql.SQLStr( string string, boolean bNoQuotes = false )
Escapes dangerous characters and symbols from user input used in an SQLite SQL Query.
this function is not meant to be used with external database engines such as MySQL. Escaping strings with inadequate functions is dangerous!
boolean sql.TableExists( string tableName )
Returns true if the table with the specified name exists.
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