lincoln-lil commented on code in PR #22881:
URL: https://github.com/apache/flink/pull/22881#discussion_r1244644095
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flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/operations/SqlNodeConvertContext.java:
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@@ -60,7 +60,9 @@ public RelRoot toRelRoot(SqlNode sqlNode) {
public String toQuotedSqlString(SqlNode sqlNode) {
SqlParser.Config parserConfig =
flinkPlanner.config().getParserConfig();
SqlDialect dialect =
- new CalciteSqlDialect(
+ // The default implementation of SqlDialect suppresses all
table hints since
+ // CALCITE-4640, so we should use AnsiSqlDialect instead to
reserve table hints.
+ new AnsiSqlDialect(
Review Comment:
The impact of this change is limited to the sql to operation conversion, and
will not affect the planner’s own dialect-related configuration
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