Remove match command (#113383)

* Remove match command

* Remove assertMatchCommand

* Remove unused import

Author: ioanatia

x-pack/plugin/esql/qa/testFixtures/src/main/resources/match.csv-spec

@@ -55,7 +55,6 @@ processingCommand
     // in development
     | {this.isDevVersion()}? inlinestatsCommand
     | {this.isDevVersion()}? lookupCommand
-    | {this.isDevVersion()}? matchCommand
     ;
 
 whereCommand
@@ -312,11 +311,3 @@ lookupCommand
 inlinestatsCommand
     : DEV_INLINESTATS stats=fields (BY grouping=fields)?
     ;
-
-matchCommand
-    : DEV_MATCH matchQuery
-    ;
-
-matchQuery
-    : QUOTED_STRING
-    ;

x-pack/plugin/esql/src/main/antlr/EsqlBaseParser.g4

@@ -268,11 +268,6 @@ public enum Cap {
          */
         COMBINE_BINARY_COMPARISONS,
 
-        /**
-         * MATCH command support
-         */
-        MATCH_COMMAND(true),
-
         /**
          * Support for nanosecond dates as a data type
          */

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/action/EsqlCapabilities.java

@@ -21,7 +21,6 @@
 import org.elasticsearch.xpack.esql.core.expression.TypeResolutions;
 import org.elasticsearch.xpack.esql.core.expression.predicate.BinaryOperator;
 import org.elasticsearch.xpack.esql.core.expression.predicate.fulltext.MatchQueryPredicate;
-import org.elasticsearch.xpack.esql.core.expression.predicate.fulltext.StringQueryPredicate;
 import org.elasticsearch.xpack.esql.core.expression.predicate.operator.comparison.BinaryComparison;
 import org.elasticsearch.xpack.esql.core.type.DataType;
 import org.elasticsearch.xpack.esql.core.util.Holder;
@@ -187,7 +186,6 @@ else if (p instanceof Lookup lookup) {
             checkForSortOnSpatialTypes(p, failures);
 
             checkFilterMatchConditions(p, failures);
-            checkMatchCommand(p, failures);
             checkFullTextQueryFunctions(p, failures);
         });
         checkRemoteEnrich(plan, failures);
@@ -644,22 +642,6 @@ private static void checkFilterMatchConditions(LogicalPlan plan, Set<Failure> fa
         }
     }
 
-    private static void checkMatchCommand(LogicalPlan plan, Set<Failure> failures) {
-        if (plan instanceof Filter f) {
-            Expression condition = f.condition();
-            if (condition instanceof StringQueryPredicate) {
-                // Similar to cases present in org.elasticsearch.xpack.esql.optimizer.rules.PushDownAndCombineFilters -
-                // we can't check if it can be pushed down as we don't have yet information about the fields present in the
-                // StringQueryPredicate
-                plan.forEachDown(LogicalPlan.class, lp -> {
-                    if ((lp instanceof Filter || lp instanceof OrderBy || lp instanceof EsRelation) == false) {
-                        failures.add(fail(plan, "MATCH cannot be used after {}", lp.sourceText().split(" ")[0].toUpperCase(Locale.ROOT)));
-                    }
-                });
-            }
-        }
-    }
-
     private static void checkFullTextQueryFunctions(LogicalPlan plan, Set<Failure> failures) {
         if (plan instanceof Filter f) {
             Expression condition = f.condition();