Support string as an input for unix_timestamp for PPL execution without Calcite

yuancu · yuancu · commit c0f2e7b2116a · 2025-05-27T16:59:31.000+08:00
Signed-off-by: Yuanchun Shen &lt;yuanchu@amazon.com&gt;
diff --git a/core/src/main/java/org/opensearch/sql/expression/datetime/DateTimeFunctions.java b/core/src/main/java/org/opensearch/sql/expression/datetime/DateTimeFunctions.java
@@ -983,7 +983,8 @@ private FunctionResolver unix_timestamp() {
             LONG),
         impl(nullMissingHandling(DateTimeFunctions::unixTimeStampOf), DOUBLE, DATE),
         impl(nullMissingHandling(DateTimeFunctions::unixTimeStampOf), DOUBLE, TIMESTAMP),
-        impl(nullMissingHandling(DateTimeFunctions::unixTimeStampOf), DOUBLE, DOUBLE));
+        impl(nullMissingHandling(DateTimeFunctions::unixTimeStampOf), DOUBLE, DOUBLE),
+        impl(nullMissingHandling(DateTimeFunctions::unixTimeStampOf), DOUBLE, STRING));
   }
 
   /** UTC_DATE(). return the current UTC Date in format yyyy-MM-dd */

Original file line number	Diff line number	Diff line change
`@@ -983,7 +983,8 @@ private FunctionResolver unix_timestamp() {`
`983`	`983`	`LONG),`
`984`	`984`	`impl(nullMissingHandling(DateTimeFunctions::unixTimeStampOf), DOUBLE, DATE),`
`985`	`985`	`impl(nullMissingHandling(DateTimeFunctions::unixTimeStampOf), DOUBLE, TIMESTAMP),`
`986`		`- impl(nullMissingHandling(DateTimeFunctions::unixTimeStampOf), DOUBLE, DOUBLE));`
	`986`	`+ impl(nullMissingHandling(DateTimeFunctions::unixTimeStampOf), DOUBLE, DOUBLE),`
	`987`	`+ impl(nullMissingHandling(DateTimeFunctions::unixTimeStampOf), DOUBLE, STRING));`
`987`	`988`	`}`
`988`	`989`
`989`	`990`	`/** UTC_DATE(). return the current UTC Date in format yyyy-MM-dd */`