ES|QL: fix ENRICH validation for use of wildcards (elastic#121911) (elastic#122021)

Author: luigidellaquila

docs/changelog/121911.yaml

@@ -0,0 +1,5 @@
+pr: 121911
+summary: Fix ENRICH validation for use of wildcards
+area: ES|QL
+type: bug
+issues: []

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/parser/ExpressionBuilder.java

@@ -731,9 +731,9 @@ public NamedExpression visitEnrichWithClause(EsqlBaseParser.EnrichWithClauseCont
 
     private NamedExpression enrichFieldName(EsqlBaseParser.QualifiedNamePatternContext ctx) {
         return visitQualifiedNamePattern(ctx, ne -> {
-            if (ne instanceof UnresolvedNamePattern up) {
+            if (ne instanceof UnresolvedNamePattern || ne instanceof UnresolvedStar) {
                 var src = ne.source();
-                throw new ParsingException(src, "Using wildcards [*] in ENRICH WITH projections is not allowed [{}]", up.pattern());
+                throw new ParsingException(src, "Using wildcards [*] in ENRICH WITH projections is not allowed, found [{}]", src.text());
             }
         });
     }

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/parser/LogicalPlanBuilder.java

@@ -433,7 +433,11 @@ public PlanFactory visitEnrichCommand(EsqlBaseParser.EnrichCommandContext ctx) {
                 : matchField instanceof UnresolvedStar ? WILDCARD
                 : null;
             if (patternString != null) {
-                throw new ParsingException(source, "Using wildcards [*] in ENRICH WITH projections is not allowed [{}]", patternString);
+                throw new ParsingException(
+                    source,
+                    "Using wildcards [*] in ENRICH WITH projections is not allowed, found [{}]",
+                    patternString
+                );
             }
 
             List<NamedExpression> keepClauses = visitList(this, ctx.enrichWithClause(), NamedExpression.class);

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/parser/StatementParserTests.java

@@ -1064,15 +1064,28 @@ public void testEnrich() {
             processingCommand("enrich _" + mode.name() + ":countries ON country_code")
         );
 
-        expectError("from a | enrich countries on foo* ", "Using wildcards [*] in ENRICH WITH projections is not allowed [foo*]");
-        expectError("from a | enrich countries on foo with bar*", "Using wildcards [*] in ENRICH WITH projections is not allowed [bar*]");
+        expectError("from a | enrich countries on foo* ", "Using wildcards [*] in ENRICH WITH projections is not allowed, found [foo*]");
+        expectError("from a | enrich countries on * ", "Using wildcards [*] in ENRICH WITH projections is not allowed, found [*]");
+        expectError(
+            "from a | enrich countries on foo with bar*",
+            "Using wildcards [*] in ENRICH WITH projections is not allowed, found [bar*]"
+        );
+        expectError("from a | enrich countries on foo with *", "Using wildcards [*] in ENRICH WITH projections is not allowed, found [*]");
         expectError(
             "from a | enrich countries on foo with x = bar* ",
-            "Using wildcards [*] in ENRICH WITH projections is not allowed [bar*]"
+            "Using wildcards [*] in ENRICH WITH projections is not allowed, found [bar*]"
+        );
+        expectError(
+            "from a | enrich countries on foo with x = * ",
+            "Using wildcards [*] in ENRICH WITH projections is not allowed, found [*]"
         );
         expectError(
             "from a | enrich countries on foo with x* = bar ",
-            "Using wildcards [*] in ENRICH WITH projections is not allowed [x*]"
+            "Using wildcards [*] in ENRICH WITH projections is not allowed, found [x*]"
+        );
+        expectError(
+            "from a | enrich countries on foo with * = bar ",
+            "Using wildcards [*] in ENRICH WITH projections is not allowed, found [*]"
         );
         expectError(
             "from a | enrich typo:countries on foo",
@@ -1970,7 +1983,7 @@ public void testParamInInvalidPosition() {
             expectError(
                 "from idx1 | " + enrich,
                 List.of(paramAsPattern("f1", pattern), paramAsIdentifier("f2", "f.2"), paramAsIdentifier("f3", "f.3*")),
-                "Using wildcards [*] in ENRICH WITH projections is not allowed [" + pattern + "]"
+                "Using wildcards [*] in ENRICH WITH projections is not allowed, found [" + pattern + "]"
             );
             expectError(
                 "from idx1 | " + enrich,