XuQianJin-Stars commented on a change in pull request #1168: [CALCITE-3005]
Implement string functions: LEFT, RIGHT
URL: https://github.com/apache/calcite/pull/1168#discussion_r276611604
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File path:
core/src/main/java/org/apache/calcite/sql/fun/SqlStdOperatorTable.java
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@@ -1508,6 +1508,24 @@ public SqlOperandCountRange getOperandCountRange() {
OperandTypes.CHARACTER,
SqlFunctionCategory.STRING);
+ public static final SqlFunction LEFT =
+ new SqlFunction(
+ "LEFT",
+ SqlKind.OTHER_FUNCTION,
+ ReturnTypes.VARCHAR_2000,
Review comment:
hi @julianhyde Thank you very much.It looks like there's a conflict between
String's LEFT semantics and LEFT JOIN semantics.I am not sure how to solve this
problem. Could you give me some advice?
best
qianjin
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