snuyanzin commented on code in PR #26547:
URL: https://github.com/apache/flink/pull/26547#discussion_r2114867387
##########
flink-table/flink-table-planner/src/main/java/org/apache/calcite/sql2rel/StandardConvertletTable.java:
##########
@@ -265,6 +277,19 @@ private StandardConvertletTable() {
call.operand(0),
SqlLiteral.createExactNumeric("0.5",
SqlParserPos.ZERO))));
+ // "STRPOS(string, substring) is equivalent to
+ // "POSITION(substring IN string)"
+ registerOp(
+ SqlLibraryOperators.STRPOS,
+ (cx, call) ->
+ cx.convertExpression(
+ SqlStdOperatorTable.POSITION.createCall(
+ SqlParserPos.ZERO, call.operand(1),
call.operand(0))));
+
+ // "INSTR(string, substring, position, occurrence) is equivalent to
Review Comment:
don't think so
existing `position`, `instr` are covered in doc
with other args just fail with validation
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