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**HPL/SQL is included to Apache Hive since version 2.0** * [[home|Home]]\\ * [[why|Why HPL/SQL]]\\ * [[features|Key Features]]\\ * [[start|Get Started]]\\ * [[doc|HPL/SQL Reference]]\\ * [[download|Download]]\\ * [[new|What's New]]\\ * [[about|About]]

signal

====== SIGNAL Statement - PL/HQL Reference====== SIGNAL statement raises a user-defined condition (exception). **Syntax**: <code language="sql"> SIGNAL condition_name; </code> **Example:** Raise a condition if the number of rows is not equal to the specified number: <code language="sql"> DECLARE cnt INT DEFAULT 0; DECLARE wrong_cnt_condition CONDITION; DECLARE EXIT HANDLER FOR wrong_cnt_condition PRINT 'Wrong number of rows'; SELECT COUNT(*) INTO cnt FROM TABLE (VALUES (1,2)); IF cnt <> 1 THEN SIGNAL wrong_cnt_condition; END IF; </code> **Compatibility**: IBM DB2, Teradata and MySQL **Version**: PL/HQL 0.3.1 **See also:** * [[error-handling|Error Handling]] * [[declare-condition|DECLARE CONDITION]] * [[declare-handler|DECLARE HANDLER]] * [[sqlcode|SQLCODE]] * [[sqlstate|SQLSTATE]] * [[get-diagnostics|GET DIAGNOSTICS]] * [[resignal|RESIGNAL]]