Data commit

Task/Determine-if-a-string-is-numeric/SQL-PL/determine-if-a-string-is-numeric.sql

@@ -0,0 +1,28 @@
+--#SET TERMINATOR @
+
+CREATE OR REPLACE FUNCTION IS_NUMERIC (
+  IN STRING VARCHAR(10)
+ ) RETURNS SMALLINT
+ -- ) RETURNS BOOLEAN
+ BEGIN
+  DECLARE RET SMALLINT;
+  -- DECLARE RET BOOLEAN;
+  DECLARE TMP INTEGER;
+  DECLARE CONTINUE HANDLER FOR SQLSTATE '22018'
+    SET RET = 1;
+    -- SET RET = FALSE;
+
+  SET RET = 0;
+  --SET RET = TRUE;
+  SET TMP = INTEGER(STRING);
+  RETURN RET;
+ END @
+
+VALUES IS_NUMERIC('5')@
+VALUES IS_NUMERIC('0')@
+VALUES IS_NUMERIC('-1')@
+VALUES IS_NUMERIC('A')@
+VALUES IS_NUMERIC('-')@
+VALUES IS_NUMERIC('z')@
+VALUES IS_NUMERIC('')@
+VALUES IS_NUMERIC(' ')@