[fix](Nereids) make the type of the first parameter in window_funnel …

…is intergerLike (apache#15810)

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/agg/WindowFunnel.java

@@ -74,7 +74,7 @@ public WindowFunnel(boolean distinct, Expression arg0, Expression arg1, Expressi
     @Override
     public void checkLegalityBeforeTypeCoercion() {
         String functionName = getName();
-        if (!getArgumentType(0).isIntegerType()) {
+        if (!getArgumentType(0).isIntegerLikeType()) {
             throw new AnalysisException("The window params of " + functionName + " function must be integer");
         }
         if (!getArgumentType(1).isStringLikeType()) {

fe/fe-core/src/main/java/org/apache/doris/nereids/types/DataType.java

@@ -29,6 +29,7 @@
 import org.apache.doris.nereids.trees.expressions.literal.SmallIntLiteral;
 import org.apache.doris.nereids.types.coercion.AbstractDataType;
 import org.apache.doris.nereids.types.coercion.CharacterType;
+import org.apache.doris.nereids.types.coercion.IntegralType;
 import org.apache.doris.nereids.types.coercion.NumericType;
 import org.apache.doris.nereids.types.coercion.PrimitiveType;
 
@@ -433,6 +434,10 @@ public boolean isBooleanType() {
         return this instanceof BooleanType;
     }
 
+    public boolean isIntegerLikeType() {
+        return this instanceof IntegralType;
+    }
+
     public boolean isTinyIntType() {
         return this instanceof TinyIntType;
     }

regression-test/data/nereids_syntax_p0/function.out

@@ -53,3 +53,10 @@
 
 -- !ceil --
 3
+
+-- !window_funnel --
+1
+
+-- !window_funnel --
+2
+

regression-test/suites/nereids_syntax_p0/function.groovy

@@ -125,5 +125,48 @@ suite("nereids_function") {
         sql "select left('abcd', 3), right('abcd', 3)"
         result([['abc', 'bcd']])
     }
+
+    // test window_funnel function
+    sql """ DROP TABLE IF EXISTS window_funnel_test """
+    sql """
+        CREATE TABLE IF NOT EXISTS window_funnel_test (
+            xwho varchar(50) NULL COMMENT 'xwho',
+            xwhen datetimev2(3) COMMENT 'xwhen',
+            xwhat int NULL COMMENT 'xwhat'
+        )
+        DUPLICATE KEY(xwho)
+        DISTRIBUTED BY HASH(xwho) BUCKETS 3
+        PROPERTIES (
+        "replication_num" = "1"
+        );
+    """
+
+    sql "INSERT into window_funnel_test (xwho, xwhen, xwhat) VALUES('1', '2022-03-12 10:41:00.111111', 1)"
+    sql "INSERT INTO window_funnel_test (xwho, xwhen, xwhat) VALUES('1', '2022-03-12 13:28:02.111111', 2)"
+    sql "INSERT INTO window_funnel_test (xwho, xwhen, xwhat) VALUES('1', '2022-03-12 16:15:01.111111', 3)"
+    sql "INSERT INTO window_funnel_test (xwho, xwhen, xwhat) VALUES('1', '2022-03-12 19:05:04.111111', 4)"
+
+    qt_window_funnel """
+        select
+            window_funnel(
+                1,
+                'default',
+                t.xwhen,
+                t.xwhat = 1,
+                t.xwhat = 2
+                ) AS level
+        from window_funnel_test t;
+    """
+    qt_window_funnel """
+        select
+            window_funnel(
+                20000,
+                'default',
+                t.xwhen,
+                t.xwhat = 1,
+                t.xwhat = 2
+            ) AS level
+        from window_funnel_test t;
+    """
 }