hsyuan commented on a change in pull request #1140: [CALCITE-2965] Implement
string functions: REPEAT, SPACE, SOUNDEX, DI…
URL: https://github.com/apache/calcite/pull/1140#discussion_r271460662
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File path: core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java
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@@ -243,6 +250,36 @@ public static int ascii(String s) {
? 0 : s.codePointAt(0);
}
+ /** SQL REPEAT(string, int) function. */
+ public static String repeat(String s, int n) {
+ if (n < 1) {
+ return "";
+ }
+ return Strings.repeat(s, n);
+ }
+
+ /** SQL SPACE(int) function. */
+ public static String space(int n) {
+ return repeat(" ", n);
+ }
+
+ /** SQL SOUNDEX(STRING) function. */
+ public static String soundex(String s) {
+ return SOUNDEX.soundex(s);
+ }
+
+ /** SQL DIFFERENCE(STRING, STRING) function. */
Review comment:
string in lower case.
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