Added support for constant-constant case in multi-search functions

dbms/src/Functions/FunctionsStringSearch.h

@@ -210,6 +210,8 @@ public:
     String getName() const override { return name; }
 
     size_t getNumberOfArguments() const override { return 2; }
+    bool useDefaultImplementationForConstants() const override { return true; }
+    ColumnNumbers getArgumentsThatAreAlwaysConstant() const override { return {1}; }
 
     DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
     {
@@ -299,6 +301,8 @@ public:
     String getName() const override { return name; }
 
     size_t getNumberOfArguments() const override { return 2; }
+    bool useDefaultImplementationForConstants() const override { return true; }
+    ColumnNumbers getArgumentsThatAreAlwaysConstant() const override { return {1}; }
 
     DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
     {

dbms/tests/queries/0_stateless/00928_multi_match_constant_constant.reference

+1
+2
+[1,8]

dbms/tests/queries/0_stateless/00928_multi_match_constant_constant.sql

+SELECT multiMatchAny('goodbye', ['^hello[, ]+world$', 'go+d *bye', 'w(or)+ld']);
+SELECT multiMatchAnyIndex('goodbye', ['^hello[, ]+world$', 'go+d *bye', 'w(or)+ld']);
+SELECT multiSearchAllPositions('hello, world', ['hello', 'world']);