Plan serialization?

Author: nik9000

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/querydsl/query/BoolQuery.java

@@ -100,4 +100,14 @@ public Query negate(Source source) {
     public boolean scorable() {
         return true;
     }
+
+    @Override
+    public boolean containsPlan() {
+        for (Query q : queries) {
+            if (q.containsPlan()) {
+                return true;
+            }
+        }
+        return false;
+    }
 }

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/querydsl/query/ExistsQuery.java

@@ -29,4 +29,9 @@ protected QueryBuilder asBuilder() {
     protected String innerToString() {
         return name;
     }
+
+    @Override
+    public boolean containsPlan() {
+        return false;
+    }
 }

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/querydsl/query/GeoDistanceQuery.java

@@ -75,4 +75,9 @@ public boolean equals(Object obj) {
     protected String innerToString() {
         return field + ":" + "(" + distance + "," + "(" + lat + ", " + lon + "))";
     }
+
+    @Override
+    public boolean containsPlan() {
+        return false;
+    }
 }

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/querydsl/query/MatchAll.java

@@ -25,4 +25,9 @@ protected QueryBuilder asBuilder() {
     protected String innerToString() {
         return "";
     }
+
+    @Override
+    public boolean containsPlan() {
+        return false;
+    }
 }

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/querydsl/query/NotQuery.java

@@ -59,4 +59,9 @@ protected String innerToString() {
     public Query negate(Source source) {
         return child;
     }
+
+    @Override
+    public boolean containsPlan() {
+        return child.containsPlan();
+    }
 }

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/querydsl/query/PrefixQuery.java

@@ -61,4 +61,9 @@ public boolean equals(Object obj) {
     protected String innerToString() {
         return field + ":" + query;
     }
+
+    @Override
+    public boolean containsPlan() {
+        return false;
+    }
 }

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/querydsl/query/Query.java

@@ -70,6 +70,12 @@ public final QueryBuilder toQueryBuilder() {
      */
     protected abstract String innerToString();
 
+    /**
+     * Does the result of calling {@link #asBuilder()} need the plan
+     * to serialize itself?
+     */
+    public abstract boolean containsPlan();
+
     @Override
     public boolean equals(Object obj) {
         if (obj == null || obj.getClass() != getClass()) {

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/querydsl/query/QueryStringQuery.java

@@ -137,4 +137,9 @@ protected String innerToString() {
     public boolean scorable() {
         return true;
     }
+
+    @Override
+    public boolean containsPlan() {
+        return false;
+    }
 }

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/querydsl/query/RangeQuery.java

@@ -118,4 +118,9 @@ public boolean equals(Object obj) {
     protected String innerToString() {
         return field + ":" + (includeLower ? "[" : "(") + lower + ", " + upper + (includeUpper ? "]" : ")") + "@" + zoneId.getId();
     }
+
+    @Override
+    public boolean containsPlan() {
+        return false;
+    }
 }

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/querydsl/query/RegexQuery.java

@@ -69,4 +69,9 @@ public boolean equals(Object obj) {
     protected String innerToString() {
         return field + "~ /" + regex + "/";
     }
+
+    @Override
+    public boolean containsPlan() {
+        return false;
+    }
 }