MDEV-19804 sql_mode=ORACLE: call procedure in packages

Adding support for the fully qualified package procedure calls:

BEGIN
  CALL db.pkg.proc(args); -- SQL/PSM call style
  db.pkg.proc(args);      -- PL/SQL call style
END;

mysql-test/suite/compat/oracle/r/sp-package.result

@@ -3135,3 +3135,101 @@ collation_connection	latin1_swedish_ci
 DROP VIEW v_test;
 SET sql_mode=ORACLE;
 DROP PACKAGE test1;
+#
+# MDEV-19804 sql_mode=ORACLE: call procedure in packages
+#
+CALL `db1 `.pkg.p;
+ERROR 42000: Incorrect database name 'db1 '
+CALL db1.`pkg `.p;
+ERROR 42000: Incorrect routine name 'pkg '
+CALL db1.pkg.`p `;
+ERROR 42000: Incorrect routine name 'p '
+SET sql_mode=ORACLE;
+CREATE PACKAGE pkg1 as
+PROCEDURE p1();
+END;
+$$
+CREATE PACKAGE BODY pkg1 as
+PROCEDURE p1() as
+BEGIN
+SELECT 'test-function' AS c1;
+END;
+END;
+$$
+CALL pkg1.p1;
+c1
+test-function
+CALL test.pkg1.p1;
+c1
+test-function
+SET sql_mode=DEFAULT;
+CALL test.pkg1.p1;
+c1
+test-function
+SET sql_mode=ORACLE;
+BEGIN
+CALL pkg1.p1;
+CALL test.pkg1.p1;
+END
+$$
+c1
+test-function
+c1
+test-function
+BEGIN
+pkg1.p1;
+test.pkg1.p1;
+END
+$$
+c1
+test-function
+c1
+test-function
+DROP PACKAGE pkg1;
+CREATE DATABASE db1;
+CREATE PACKAGE db1.pkg1 AS
+PROCEDURE p1(a OUT TEXT);
+END;
+$$
+CREATE PACKAGE BODY db1.pkg1 AS
+PROCEDURE p1(a OUT TEXT) AS
+BEGIN
+a:= 'This is db1.pkg1.p1';
+END;
+END;
+$$
+CREATE DATABASE db2;
+CREATE PACKAGE db2.pkg1 AS
+FUNCTION var1 RETURN TEXT;
+PROCEDURE p1(a OUT TEXT);
+PROCEDURE p2_db1_pkg1_p1;
+END;
+$$
+CREATE PACKAGE BODY db2.pkg1 AS
+m_var1 TEXT;
+FUNCTION var1 RETURN TEXT AS
+BEGIN
+RETURN m_var1;
+END;
+PROCEDURE p1(a OUT TEXT) AS
+BEGIN
+a:= 'This is db2.pkg1.p1';
+END;
+PROCEDURE p2_db1_pkg1_p1 AS
+a TEXT;
+BEGIN
+db1.pkg1.p1(a);
+SELECT a;
+END;
+BEGIN
+db1.pkg1.p1(m_var1);
+END;
+$$
+SELECT db2.pkg1.var1();
+db2.pkg1.var1()
+This is db1.pkg1.p1
+CALL db2.pkg1.p2_db1_pkg1_p1;
+a
+This is db1.pkg1.p1
+DROP DATABASE db1;
+DROP DATABASE db2;

mysql-test/suite/compat/oracle/t/sp-package.test

@@ -2895,3 +2895,117 @@ DROP VIEW v_test;
 
 SET sql_mode=ORACLE;
 DROP PACKAGE test1;
+
+
+--echo #
+--echo # MDEV-19804 sql_mode=ORACLE: call procedure in packages
+--echo #
+
+--error ER_WRONG_DB_NAME
+CALL `db1 `.pkg.p;
+--error ER_SP_WRONG_NAME
+CALL db1.`pkg `.p;
+--error ER_SP_WRONG_NAME
+CALL db1.pkg.`p `;
+
+
+SET sql_mode=ORACLE;
+DELIMITER $$;
+CREATE PACKAGE pkg1 as
+  PROCEDURE p1();
+END;
+$$
+CREATE PACKAGE BODY pkg1 as
+  PROCEDURE p1() as
+  BEGIN
+    SELECT 'test-function' AS c1;
+  END;
+END;
+$$
+DELIMITER ;$$
+
+CALL pkg1.p1;
+CALL test.pkg1.p1;
+
+# In sql_mode=DEFAULT we support fully qualified package function names
+# (this is needed for VIEWs). Let's make sure we also support fully
+# qualified package procedure names, for symmetry
+
+SET sql_mode=DEFAULT;
+CALL test.pkg1.p1;
+SET sql_mode=ORACLE;
+
+DELIMITER $$;
+BEGIN
+  CALL pkg1.p1;
+  CALL test.pkg1.p1;
+END
+$$
+DELIMITER ;$$
+
+DELIMITER $$;
+BEGIN
+  pkg1.p1;
+  test.pkg1.p1;
+END
+$$
+DELIMITER ;$$
+
+DROP PACKAGE pkg1;
+
+
+#
+# Testing packages in different databases calling each other
+# in routines and in the initialization section.
+#
+
+CREATE DATABASE db1;
+DELIMITER $$;
+CREATE PACKAGE db1.pkg1 AS
+  PROCEDURE p1(a OUT TEXT);
+END;
+$$
+CREATE PACKAGE BODY db1.pkg1 AS
+  PROCEDURE p1(a OUT TEXT) AS
+  BEGIN
+    a:= 'This is db1.pkg1.p1';
+  END;
+END;
+$$
+DELIMITER ;$$
+
+CREATE DATABASE db2;
+DELIMITER $$;
+CREATE PACKAGE db2.pkg1 AS
+  FUNCTION var1 RETURN TEXT;
+  PROCEDURE p1(a OUT TEXT);
+  PROCEDURE p2_db1_pkg1_p1;
+END;
+$$
+CREATE PACKAGE BODY db2.pkg1 AS
+  m_var1 TEXT;
+  FUNCTION var1 RETURN TEXT AS
+  BEGIN
+    RETURN m_var1;
+  END;
+  PROCEDURE p1(a OUT TEXT) AS
+  BEGIN
+    a:= 'This is db2.pkg1.p1';
+  END;
+  PROCEDURE p2_db1_pkg1_p1 AS
+    a TEXT;
+  BEGIN
+    db1.pkg1.p1(a);
+    SELECT a;
+  END;
+BEGIN
+  db1.pkg1.p1(m_var1);
+END;
+$$
+DELIMITER ;$$
+
+SELECT db2.pkg1.var1();
+CALL db2.pkg1.p2_db1_pkg1_p1;
+
+DROP DATABASE db1;
+DROP DATABASE db2;

sql/sql_lex.cc

@@ -7893,6 +7893,40 @@ bool LEX::call_statement_start(THD *thd, const LEX_CSTRING *name1,
 }
 
 
+bool LEX::call_statement_start(THD *thd, const LEX_CSTRING &db,
+                                         const LEX_CSTRING &pkg,
+                                         const LEX_CSTRING &proc)
+{
+  Database_qualified_name q_db_pkg(db, pkg);
+  Database_qualified_name q_pkg_proc(pkg, proc);
+  sp_name *spname;
+
+  sql_command= SQLCOM_CALL;
+
+  if (check_db_name((LEX_STRING*) const_cast<LEX_CSTRING*>(&db)))
+  {
+    my_error(ER_WRONG_DB_NAME, MYF(0), db.str);
+    return NULL;
+  }
+  if (check_routine_name(&pkg) ||
+      check_routine_name(&proc))
+    return NULL;
+
+  // Concat `pkg` and `name` to `pkg.name`
+  LEX_CSTRING pkg_dot_proc;
+  if (q_pkg_proc.make_qname(thd->mem_root, &pkg_dot_proc) ||
+      check_ident_length(&pkg_dot_proc) ||
+      !(spname= new (thd->mem_root) sp_name(&db, &pkg_dot_proc, true)))
+    return NULL;
+
+  sp_handler_package_function.add_used_routine(thd->lex, thd, spname);
+  sp_handler_package_body.add_used_routine(thd->lex, thd, &q_db_pkg);
+
+  return !(m_sql_cmd= new (thd->mem_root) Sql_cmd_call(spname,
+                                              &sp_handler_package_procedure));
+}
+
+
 sp_package *LEX::get_sp_package() const
 {
   return sphead ? sphead->get_package() : NULL;

sql/sql_lex.h

@@ -3478,6 +3478,9 @@ struct LEX: public Query_tables_list
   bool call_statement_start(THD *thd, const LEX_CSTRING *name);
   bool call_statement_start(THD *thd, const LEX_CSTRING *name1,
                                       const LEX_CSTRING *name2);
+  bool call_statement_start(THD *thd, const LEX_CSTRING &name1,
+                                      const LEX_CSTRING &name2,
+                                      const LEX_CSTRING &name3);
   sp_variable *find_variable(const LEX_CSTRING *name,
                              sp_pcontext **ctx,
                              const Sp_rcontext_handler **rh) const;

sql/sql_yacc.yy

@@ -3345,9 +3345,29 @@ sp_suid:
         ;
 
 call:
-          CALL_SYM sp_name
+          CALL_SYM ident
           {
-            if (unlikely(Lex->call_statement_start(thd, $2)))
+            if (unlikely(Lex->call_statement_start(thd, &$2)))
+              MYSQL_YYABORT;
+          }
+          opt_sp_cparam_list
+          {
+            if (Lex->check_cte_dependencies_and_resolve_references())
+              MYSQL_YYABORT;
+          }
+        | CALL_SYM ident '.' ident
+          {
+            if (unlikely(Lex->call_statement_start(thd, &$2, &$4)))
+              MYSQL_YYABORT;
+          }
+          opt_sp_cparam_list
+          {
+            if (Lex->check_cte_dependencies_and_resolve_references())
+              MYSQL_YYABORT;
+          }
+        | CALL_SYM ident '.' ident '.' ident
+          {
+            if (unlikely(Lex->call_statement_start(thd, $2, $4, $6)))
               MYSQL_YYABORT;
           }
           opt_sp_cparam_list

sql/sql_yacc_ora.yy

@@ -2999,9 +2999,29 @@ sp_suid:
         ;
 
 call:
-          CALL_SYM sp_name
+          CALL_SYM ident
           {
-            if (unlikely(Lex->call_statement_start(thd, $2)))
+            if (unlikely(Lex->call_statement_start(thd, &$2)))
+              MYSQL_YYABORT;
+          }
+          opt_sp_cparam_list
+          {
+            if (Lex->check_cte_dependencies_and_resolve_references())
+              MYSQL_YYABORT;
+          }
+        | CALL_SYM ident '.' ident
+          {
+            if (unlikely(Lex->call_statement_start(thd, &$2, &$4)))
+              MYSQL_YYABORT;
+          }
+          opt_sp_cparam_list
+          {
+            if (Lex->check_cte_dependencies_and_resolve_references())
+              MYSQL_YYABORT;
+          }
+        | CALL_SYM ident '.' ident '.' ident
+          {
+            if (unlikely(Lex->call_statement_start(thd, $2, $4, $6)))
               MYSQL_YYABORT;
           }
           opt_sp_cparam_list
@@ -3922,12 +3942,30 @@ sp_statement:
               MYSQL_YYABORT;
           }
           opt_sp_cparam_list
+          {
+            if (Lex->check_cte_dependencies_and_resolve_references())
+              MYSQL_YYABORT;
+          }
         | ident_directly_assignable '.' ident
           {
             if (unlikely(Lex->call_statement_start(thd, &$1, &$3)))
               MYSQL_YYABORT;
           }
           opt_sp_cparam_list
+          {
+            if (Lex->check_cte_dependencies_and_resolve_references())
+              MYSQL_YYABORT;
+          }
+        | ident_directly_assignable '.' ident '.' ident
+          {
+            if (unlikely(Lex->call_statement_start(thd, $1, $3, $5)))
+              MYSQL_YYABORT;
+          }
+          opt_sp_cparam_list
+          {
+            if (Lex->check_cte_dependencies_and_resolve_references())
+              MYSQL_YYABORT;
+          }
         ;
 
 sp_proc_stmt_statement: