vlsi commented on a change in pull request #800: [CALCITE-2460][CALCITE-2459]
Add implementation of To_Base64 and From_Base64 to SqlFunctions
URL: https://github.com/apache/calcite/pull/800#discussion_r297187067
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File path: core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java
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@@ -123,6 +129,39 @@
private SqlFunctions() {
}
+ /** SQL TO_BASE64(string) function. */
+ public static String toBase64(String string) {
+ return toBase64_(string.getBytes(UTF_8));
+ }
+
+ /** SQL TO_BASE64(string) function for binary string. */
+ public static String toBase64(ByteString string) {
+ return toBase64_(string.getBytes());
+ }
+
+ private static String toBase64_(byte[] bytes) {
+ String base64 = Base64.getEncoder().encodeToString(bytes);
+ StringBuilder str = new StringBuilder(base64.length() + base64.length() /
76);
+ if (base64.length() > 76) {
+ Splitter.fixedLength(76).split(base64).iterator().forEachRemaining(s -> {
Review comment:
Can you please clarify why do you split the lines manually instead of using
`java.util.Base64#getMimeEncoder()` ?
It looks like `Base64` can split the lines on its own just fine.
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