xuefuz commented on a change in pull request #10231: [FLINK-14711][table] add
alter and show function ddl
URL: https://github.com/apache/flink/pull/10231#discussion_r347198098
##########
File path:
flink-table/flink-sql-parser/src/main/codegen/includes/parserImpls.ftl
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@@ -177,6 +177,56 @@ SqlDescribeDatabase SqlDescribeDatabase() :
}
+SqlAlterFunction SqlAlterFunction() :
+{
+ SqlIdentifier functionName = null;
+ SqlCharStringLiteral functionClassName = null;
+ SqlCharStringLiteral functionLanguage = null;
+ SqlParserPos startPos;
+ boolean ifExists = false;
+ boolean isSystemFunction = false;
+}
+{
+ <ALTER>
+ <TEMPORARY>
+ (
+ <SYSTEM> { isSystemFunction = true; }
+ |
+ {isSystemFunction = false; }
+ )
+ <FUNCTION> { startPos = getPos(); }
+ (
+ <IF> <EXISTS> { ifExists = true; }
+ |
+ { ifExists = false; }
+ )
+ functionName = CompoundIdentifier()
+ [ <AS> <QUOTED_STRING> {
+ String p = SqlParserUtil.parseString(token.image);
+ functionClassName = SqlLiteral.createCharString(p, getPos());
+ }]
+ [ <LANGUAGE> <QUOTED_STRING> {
Review comment:
Not sure if what's our decision on language types, but have a quoted string
for language seems suggestion user can put anything. One alternative is define
constant such as SQL, PYTHON, JAVA, etc.
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