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  • Overview
  • Programming
  • 1. Establishing the connection
  • 2. Running queries
  • 3. Retrieving the result
  • 4. Closing the connection
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Stored procedures
Overview
The SQL functions can be used to handle the MariaDB database.
Differences compared to HFSQL programming: The use of SQL functions for handling the MariaDB data does not require to import the structure of files into the analysis. However, the data must be handled by queries only. The content of MariaDB files cannot be read directly.
Note: From version 19, HFSQL is the new name of HyperFileSQL.
Programming

1. Establishing the connection

SQLConnect is used to establish a connection to a MariaDB database via Native Connector. The type of database used (MariaDB in this case) must be passed in parameter to SQLConnect.
Note: The name of the MariaDB data source ("MariaDBDatabase") is the name of the computer where the database is available or its IP address. In any case, the name of the "Database" must be specified.
ConnectionNum = SQLConnect("MariaDBDatabase", "", "", "", "MariaDB")
// or ConnectionNum = SQLConnect("MariaDBDatabase", "User", "Password", ...
// "MyDataBase", "MariaDB")

// Connection to a remote MariaDB database
ConnectionNum = SQLConnect("192.168.1.51", "User", "Password", "test", "MariaDB")

2. Running queries

The queries are run by SQLExec. SQLExec expects in parameter the text of the SQL query as well as the name that will be given to this query.
SQLExec("SELECT LASTNAME, FIRSTNAME, EXTENSION, PHOTO FROM CUSTOMER", "QRY1")

3. Retrieving the result

Several methods can be used to retrieve the result:
  • SQLFirst: Used to retrieve the result and to initialize a SQLFirst/SQLCol browse.
  • SQLTable: Used to retrieve the result of the query in a memory table of the WINDEV application or WEBDEV site. The result of the query can be retrieved by partial Fetch.
  • SQLFetch: Used to browse the different lines of query result. The browse performed in the query result is an SQLFetch/SQLGetCol browse.
SQLLock is used to lock either the table records, or the records selected by the query. The time-out (maximum wait) to lock or modify a locked record is set to 50s by default on MariaDB. When the time-out value is reached, an error is returned by the database.

4. Closing the connection

SQLClose is used to close the connection to the database when all the necessary queries have been run.
Minimum required version
  • Version 20
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