Polishing.

Inline select_query into select_statement, simplify set_function resolution.
Align JPQL and EQL grammars.
Adopt Hibernate version guards in tests.

Original Pull Request: #3695

Author: mp911de

Diff for: spring-data-jpa/src/main/antlr4/org/springframework/data/jpa/repository/query/Eql.g4

@@ -43,7 +43,7 @@ ql_statement
     ;
 
 select_statement
-    : select_clause from_clause (where_clause)? (groupby_clause)? (having_clause)? (orderby_clause)? (setOperator select_statement)*
+    : select_clause from_clause (where_clause)? (groupby_clause)? (having_clause)? (orderby_clause)? (set_fuction)?
     ;
 
 setOperator
@@ -52,6 +52,10 @@ setOperator
     | EXCEPT ALL?
     ;
 
+set_fuction
+    : setOperator select_statement
+    ;
+
 update_statement
     : update_clause (where_clause)?
     ;
@@ -659,6 +663,7 @@ constructor_name
 
 literal
     : STRINGLITERAL
+    | JAVASTRINGLITERAL
     | INTLITERAL
     | FLOATLITERAL
     | LONGLITERAL
@@ -827,9 +832,9 @@ reserved_word
        |OR
        |ORDER
        |OUTER
+       |POWER
        |REPLACE
        |RIGHT
-       |POWER
        |ROUND
        |SELECT
        |SET
@@ -997,6 +1002,7 @@ NOT_EQUAL                   : '<>' | '!=' ;
 
 CHARACTER                   : '\'' (~ ('\'' | '\\')) '\'' ;
 IDENTIFICATION_VARIABLE     : ('a' .. 'z' | 'A' .. 'Z' | '\u0080' .. '\ufffe' | '$' | '_') ('a' .. 'z' | 'A' .. 'Z' | '\u0080' .. '\ufffe' | '0' .. '9' | '$' | '_')* ;
+JAVASTRINGLITERAL           : '"' ( ('\\' [btnfr"']) | ~('"'))* '"';
 STRINGLITERAL               : '\'' (~ ('\'' | '\\')|'\\')* '\'' ;
 FLOATLITERAL                : ('0' .. '9')* '.' ('0' .. '9')+ (E ('0' .. '9')+)* (F|D)?;
 INTLITERAL                  : ('0' .. '9')+ ;

Diff for: spring-data-jpa/src/main/antlr4/org/springframework/data/jpa/repository/query/Jpql.g4

@@ -43,10 +43,6 @@ ql_statement
     ;
 
 select_statement
-    : select_query
-    ;
-
-select_query
     : select_clause from_clause (where_clause)? (groupby_clause)? (having_clause)? (orderby_clause)? (set_fuction)?
     ;
 
@@ -57,11 +53,7 @@ setOperator
     ;
 
 set_fuction
-    : setOperator set_function_select
-    ;
-
-set_function_select
-    : select_query
+    : setOperator select_statement
     ;
 
 update_statement
@@ -95,7 +87,7 @@ join
     ;
 
 fetch_join
-    : join_spec FETCH join_association_path_expression
+    : join_spec FETCH join_association_path_expression AS? identification_variable? join_condition?
     ;
 
 join_spec
@@ -315,7 +307,7 @@ scalar_expression
     | datetime_expression
     | boolean_expression
     | case_expression
-    | cast_expression
+    | cast_function
     | entity_type_expression
     ;
 
@@ -441,6 +433,7 @@ arithmetic_primary
     | functions_returning_numerics
     | aggregate_expression
     | case_expression
+    | cast_function
     | function_invocation
     | '(' subquery ')'
     ;
@@ -453,7 +446,6 @@ string_expression
     | aggregate_expression
     | case_expression
     | function_invocation
-    | string_expression op='||' string_expression
     | '(' subquery ')'
     | string_expression '||' string_expression
     ;
@@ -539,8 +531,8 @@ functions_returning_strings
     | SUBSTRING '(' string_expression ',' arithmetic_expression (',' arithmetic_expression)? ')'
     | TRIM '(' ((trim_specification)? (trim_character)? FROM)? string_expression ')'
     | LOWER '(' string_expression ')'
-    | REPLACE '(' string_expression ',' string_expression ',' string_expression ')'
     | UPPER '(' string_expression ')'
+    | REPLACE '(' string_expression ',' string_expression ',' string_expression ')'
     | LEFT '(' string_expression ',' arithmetic_expression ')'
     | RIGHT '(' string_expression ',' arithmetic_expression ')'
     ;
@@ -551,6 +543,9 @@ trim_specification
     | BOTH
     ;
 
+cast_function
+    : CAST '(' single_valued_path_expression (identification_variable)? identification_variable ('(' numeric_literal (',' numeric_literal)* ')')? ')'
+    ;
 
 function_invocation
     : FUNCTION '(' function_name (',' function_arg)* ')'
@@ -615,9 +610,6 @@ nullif_expression
     : NULLIF '(' scalar_expression ',' scalar_expression ')'
     ;
 
-cast_expression
-    : CAST '(' string_expression AS type_literal ')'
-    ;
 
 /*******************
     Gaps in the spec.
@@ -631,6 +623,7 @@ trim_character
 identification_variable
     : IDENTIFICATION_VARIABLE
     | f=(COUNT
+    | AS
     | DATE
     | FROM
     | INNER
@@ -646,6 +639,7 @@ identification_variable
     | TIME
     | TYPE
     | VALUE)
+    | type_literal
     ;
 
 constructor_name
@@ -673,6 +667,9 @@ pattern_value
 
 date_time_timestamp_literal
     : STRINGLITERAL
+    | DATELITERAL
+    | TIMELITERAL
+    | TIMESTAMPLITERAL
     ;
 
 entity_type_literal
@@ -965,9 +962,10 @@ ON                          : O N;
 OR                          : O R;
 ORDER                       : O R D E R;
 OUTER                       : O U T E R;
+POWER                       : P O W E R;
+REGEXP                      : R E G E X P;
 REPLACE                     : R E P L A C E;
 RIGHT                       : R I G H T;
-POWER                       : P O W E R;
 ROUND                       : R O U N D;
 SELECT                      : S E L E C T;
 SET                         : S E T;
@@ -997,8 +995,11 @@ NOT_EQUAL                   : '<>' | '!=' ;
 
 CHARACTER                   : '\'' (~ ('\'' | '\\')) '\'' ;
 IDENTIFICATION_VARIABLE     : ('a' .. 'z' | 'A' .. 'Z' | '\u0080' .. '\ufffe' | '$' | '_') ('a' .. 'z' | 'A' .. 'Z' | '\u0080' .. '\ufffe' | '0' .. '9' | '$' | '_')* ;
-STRINGLITERAL               : '\'' (~ ('\'' | '\\'))* '\'' ;
+STRINGLITERAL               : '\'' (~ ('\'' | '\\')|'\\')* '\'' ;
 JAVASTRINGLITERAL           : '"' ( ('\\' [btnfr"']) | ~('"'))* '"';
 FLOATLITERAL                : ('0' .. '9')* '.' ('0' .. '9')+ (E ('0' .. '9')+)* (F|D)?;
 INTLITERAL                  : ('0' .. '9')+ ;
-LONGLITERAL                  : ('0' .. '9')+L ;
+LONGLITERAL                 : ('0' .. '9')+ L;
+DATELITERAL                 : '{' D STRINGLITERAL '}';
+TIMELITERAL                 : '{' T STRINGLITERAL '}';
+TIMESTAMPLITERAL            : '{' T S STRINGLITERAL '}';

Diff for: spring-data-jpa/src/main/java/org/springframework/data/jpa/repository/query/EqlCountQueryTransformer.java

@@ -42,7 +42,7 @@ class EqlCountQueryTransformer extends EqlQueryRenderer {
 	}
 
 	@Override
-	public QueryRendererBuilder visitSelect_statement(EqlParser.Select_statementContext ctx) {
+	public QueryTokenStream visitSelect_statement(EqlParser.Select_statementContext ctx) {
 
 		QueryRendererBuilder builder = QueryRenderer.builder();
 
@@ -92,7 +92,7 @@ public QueryTokenStream visitSelect_clause(EqlParser.Select_clauseContext ctx) {
 		return builder;
 	}
 
-	private QueryRendererBuilder getDistinctCountSelection(QueryTokenStream selectionListbuilder) {
+	private QueryTokenStream getDistinctCountSelection(QueryTokenStream selectionListbuilder) {
 
 		QueryRendererBuilder nested = new QueryRendererBuilder();
 		CountSelectionTokenStream countSelection = CountSelectionTokenStream.create(selectionListbuilder);