snuyanzin commented on code in PR #28276:
URL: https://github.com/apache/flink/pull/28276#discussion_r3323557267
##########
flink-table/flink-sql-parser/src/main/codegen/templates/Parser.jj:
##########
@@ -2236,6 +2236,16 @@ SqlNode TableRef3(ExprContext exprContext, boolean
lateral) :
{
tableRef = unnestOp.createCall(s.end(this), (List<SqlNode>) args);
}
+ |
+ // LATERAL with implicit table function call syntax,
+ // e.g. "FROM t, LATERAL fn(...)" instead of "FROM t, LATERAL
TABLE(fn(...))".
+ // The non-LATERAL implicit form is handled by the
CompoundTableIdentifier
+ // branch above.
+ LOOKAHEAD(2)
+ <LATERAL> { lateral = true; }
+ tableName = CompoundTableIdentifier()
+ tableRef = ImplicitTableFunctionCallArgs(tableName)
+ tableRef = addLateral(tableRef, lateral)
Review Comment:
Ideally this file should be removed once we update Calcite to versions
containing all the backports
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