diff --git a/data/xml/errors.xml b/data/xml/errors.xml
index 3079b79b2..c865bea5f 100644
--- a/data/xml/errors.xml
+++ b/data/xml/errors.xml
@@ -7,6 +7,8 @@
         <error regexp="MySQLSyntaxErrorException"/>
         <error regexp="valid MySQL result"/>
         <error regexp="check the manual that (corresponds to|fits) your MySQL server version"/>
+        <error regexp="check the manual that (corresponds to|fits) your MariaDB server version" fork="MariaDB"/>
+        <error regexp="check the manual that (corresponds to|fits) your Drizzle server version" fork="Drizzle"/>
         <error regexp="Unknown column '[^ ]+' in 'field list'"/>
         <error regexp="MySqlClient\."/>
         <error regexp="com\.mysql\.jdbc"/>
@@ -14,7 +16,6 @@
         <error regexp="Pdo[./_\\]Mysql"/>
         <error regexp="MySqlException"/>
         <error regexp="SQLSTATE\[\d+\]: Syntax error or access violation"/>
-        <error regexp="check the manual that (corresponds to|fits) your MariaDB server version" fork="MariaDB"/>
         <error regexp="MemSQL does not support this type of query" fork="MemSQL"/>
         <error regexp="is not supported by MemSQL" fork="MemSQL"/>
         <error regexp="unsupported nested scalar subselect" fork="MemSQL"/>
diff --git a/data/xml/queries.xml b/data/xml/queries.xml
index dfe0241e4..0e42a664e 100644
--- a/data/xml/queries.xml
+++ b/data/xml/queries.xml
@@ -29,8 +29,8 @@
         <is_dba query="(SELECT super_priv FROM mysql.user WHERE user='%s' LIMIT 0,1)='Y'"/>
         <check_udf query="(SELECT name FROM mysql.func WHERE name='%s' LIMIT 0,1)='%s'"/>
         <users>
-            <inband query="SELECT grantee FROM INFORMATION_SCHEMA.USER_PRIVILEGES" query2="SELECT user FROM mysql.user"/>
-            <blind query="SELECT DISTINCT(grantee) FROM INFORMATION_SCHEMA.USER_PRIVILEGES LIMIT %d,1" query2="SELECT DISTINCT(user) FROM mysql.user LIMIT %d,1" count="SELECT COUNT(DISTINCT(grantee)) FROM INFORMATION_SCHEMA.USER_PRIVILEGES" count2="SELECT COUNT(DISTINCT(user)) FROM mysql.user"/>
+            <inband query="SELECT grantee FROM INFORMATION_SCHEMA.USER_PRIVILEGES" query2="SELECT user FROM mysql.user" query3="SELECT username FROM DATA_DICTIONARY.CUMULATIVE_USER_STATS"/>
+            <blind query="SELECT DISTINCT(grantee) FROM INFORMATION_SCHEMA.USER_PRIVILEGES LIMIT %d,1" query2="SELECT DISTINCT(user) FROM mysql.user LIMIT %d,1" query3="SELECT DISTINCT(username) FROM DATA_DICTIONARY.CUMULATIVE_USER_STATS LIMIT %d,1" count="SELECT COUNT(DISTINCT(grantee)) FROM INFORMATION_SCHEMA.USER_PRIVILEGES" count2="SELECT COUNT(DISTINCT(user)) FROM mysql.user" count3="SELECT COUNT(DISTINCT(username)) FROM DATA_DICTIONARY.CUMULATIVE_USER_STATS"/>
         </users>
         <!-- https://github.com/dev-sec/mysql-baseline/issues/35 -->
         <!-- https://stackoverflow.com/a/31122246 -->
@@ -44,7 +44,7 @@
         </privileges>
         <roles/>
         <statements>
-            <inband query="SELECT INFO FROM INFORMATION_SCHEMA.PROCESSLIST"/>
+            <inband query="SELECT INFO FROM INFORMATION_SCHEMA.PROCESSLIST" query2="SELECT INFO FROM DATA_DICTIONARY.PROCESSLIST"/>
             <blind query="SELECT INFO FROM INFORMATION_SCHEMA.PROCESSLIST ORDER BY ID LIMIT %d,1" query2="SELECT INFO FROM INFORMATION_SCHEMA.PROCESSLIST WHERE ID=%d" query3="SELECT ID FROM INFORMATION_SCHEMA.PROCESSLIST LIMIT %d,1" count="SELECT COUNT(DISTINCT(INFO)) FROM INFORMATION_SCHEMA.PROCESSLIST"/>
         </statements>
         <dbs>
@@ -131,7 +131,7 @@
             <blind query="SELECT tablename FROM pg_tables WHERE schemaname='%s' ORDER BY tablename OFFSET %d LIMIT 1" count="SELECT COUNT(tablename) FROM pg_tables WHERE schemaname='%s'"/>
         </tables>
         <columns>
-            <inband query="SELECT attname,typname FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND a.relname='%s' AND nspname='%s'" condition="attname"/>
+            <inband query="SELECT attname,typname FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND a.relname='%s' AND nspname='%s' ORDER BY attname" condition="attname"/>
             <blind query="SELECT attname FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND a.relname='%s' AND nspname='%s' ORDER BY attname" query2="SELECT typname FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relname='%s' AND a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND attname='%s' AND nspname='%s' ORDER BY attname" count="SELECT COUNT(attname) FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND a.relname='%s' AND nspname='%s'" condition="attname"/>
         </columns>
         <dump_table>
@@ -198,8 +198,8 @@
             <blind query="SELECT TOP 1 name FROM master..sysdatabases WHERE name NOT IN (SELECT TOP %d name FROM master..sysdatabases ORDER BY name) ORDER BY name" count="SELECT LTRIM(STR(COUNT(name))) FROM master..sysdatabases"/>
         </dbs>
         <tables>
-            <inband query="SELECT %s..sysusers.name+'.'+%s..sysobjects.name FROM %s..sysobjects INNER JOIN %s..sysusers ON %s..sysobjects.uid = %s..sysusers.uid WHERE %s..sysobjects.xtype IN ('u','v')" query2="SELECT table_schema+'.'+table_name FROM information_schema.tables WHERE table_catalog='%s'" query3="SELECT name FROM %s..sysobjects WHERE xtype = 'U'"/>
-            <blind query="SELECT TOP 1 %s..sysusers.name+'.'+%s..sysobjects.name FROM %s..sysobjects INNER JOIN %s..sysusers ON %s..sysobjects.uid = %s..sysusers.uid WHERE %s..sysobjects.xtype IN ('u','v') AND %s..sysusers.name+'.'+%s..sysobjects.name NOT IN (SELECT TOP %d %s..sysusers.name+'.'+%s..sysobjects.name FROM %s..sysobjects INNER JOIN %s..sysusers ON %s..sysobjects.uid = %s..sysusers.uid WHERE %s..sysobjects.xtype IN ('u','v') ORDER BY %s..sysusers.name+'.'+%s..sysobjects.name) ORDER BY %s..sysusers.name+'.'+%s..sysobjects.name" count="SELECT LTRIM(STR(COUNT(name))) FROM %s..sysobjects WHERE %s..sysobjects.xtype IN ('u','v')" query2="SELECT TOP 1 table_schema+'.'+table_name FROM information_schema.tables WHERE table_catalog='%s' AND table_schema+'.'+table_name NOT IN (SELECT TOP %d table_schema+'.'+table_name FROM information_schema.tables WHERE table_catalog='%s' ORDER BY table_schema+'.'+table_name) ORDER BY table_schema+'.'+table_name" count2="SELECT LTRIM(STR(COUNT(table_name))) FROM information_schema.tables WHERE table_catalog='%s'" query3="SELECT TOP 1 name FROM %s..sysobjects WHERE xtype = 'U' AND name NOT IN (SELECT TOP %d name FROM %s..sysobjects WHERE xtype = 'U' ORDER BY name) ORDER BY name" count3="SELECT COUNT(name) FROM %s..sysobjects WHERE xtype = 'U'"/>
+            <inband query="SELECT %s..sysusers.name+'.'+%s..sysobjects.name FROM %s..sysobjects INNER JOIN %s..sysusers ON %s..sysobjects.uid=%s..sysusers.uid WHERE %s..sysobjects.xtype IN ('u','v')" query2="SELECT table_schema+'.'+table_name FROM information_schema.tables WHERE table_catalog='%s'" query3="SELECT name FROM %s..sysobjects WHERE xtype='U'"/>
+            <blind query="SELECT TOP 1 %s..sysusers.name+'.'+%s..sysobjects.name FROM %s..sysobjects INNER JOIN %s..sysusers ON %s..sysobjects.uid=%s..sysusers.uid WHERE %s..sysobjects.xtype IN ('u','v') AND %s..sysusers.name+'.'+%s..sysobjects.name NOT IN (SELECT TOP %d %s..sysusers.name+'.'+%s..sysobjects.name FROM %s..sysobjects INNER JOIN %s..sysusers ON %s..sysobjects.uid=%s..sysusers.uid WHERE %s..sysobjects.xtype IN ('u','v') ORDER BY %s..sysusers.name+'.'+%s..sysobjects.name) ORDER BY %s..sysusers.name+'.'+%s..sysobjects.name" count="SELECT LTRIM(STR(COUNT(name))) FROM %s..sysobjects WHERE %s..sysobjects.xtype IN ('u','v')" query2="SELECT TOP 1 table_schema+'.'+table_name FROM information_schema.tables WHERE table_catalog='%s' AND table_schema+'.'+table_name NOT IN (SELECT TOP %d table_schema+'.'+table_name FROM information_schema.tables WHERE table_catalog='%s' ORDER BY table_schema+'.'+table_name) ORDER BY table_schema+'.'+table_name" count2="SELECT LTRIM(STR(COUNT(table_name))) FROM information_schema.tables WHERE table_catalog='%s'" query3="SELECT TOP 1 name FROM %s..sysobjects WHERE xtype='U' AND name NOT IN (SELECT TOP %d name FROM %s..sysobjects WHERE xtype='U' ORDER BY name) ORDER BY name" count3="SELECT COUNT(name) FROM %s..sysobjects WHERE xtype='U'"/>
         </tables>
         <columns>
             <inband query="SELECT %s..syscolumns.name,TYPE_NAME(%s..syscolumns.xtype) FROM %s..syscolumns,%s..sysobjects WHERE %s..syscolumns.id=%s..sysobjects.id AND %s..sysobjects.name='%s'" query2="SELECT COL_NAME(OBJECT_ID('%s.%s'),%d)" condition="[DB]..syscolumns.name"/>
@@ -445,8 +445,8 @@
             <blind query="SELECT FIRST 1 SKIP %d DISTINCT(RDB$USER) FROM RDB$USER_PRIVILEGES" count="SELECT COUNT(DISTINCT(RDB$USER)) FROM RDB$USER_PRIVILEGES"/>
         </users>
         <tables>
-            <inband query="SELECT RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG = 0)"/>
-            <blind query="SELECT FIRST 1 SKIP %d RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG = 0)" count="SELECT COUNT(RDB$RELATION_NAME) FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG = 0)"/>
+            <inband query="SELECT RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG=0)"/>
+            <blind query="SELECT FIRST 1 SKIP %d RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG=0)" count="SELECT COUNT(RDB$RELATION_NAME) FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG=0)"/>
         </tables>
         <privileges>
             <inband query="SELECT RDB$USER,RDB$PRIVILEGE FROM RDB$USER_PRIVILEGES" condition="RDB$USER"/>
@@ -456,9 +456,9 @@
         <statements/>
         <dbs/>
         <columns>
-            <!--<inband query="SELECT r.RDB$FIELD_NAME,CASE f.RDB$FIELD_TYPE WHEN 261 THEN 'BLOB' WHEN 14 THEN 'CHAR' WHEN 40 THEN 'CSTRING' WHEN 11 THEN 'D_FLOAT' WHEN 27 THEN 'DOUBLE' WHEN 10 THEN 'FLOAT' WHEN 16 THEN 'INT64' WHEN 8 THEN 'INTEGER' WHEN 9 THEN 'QUAD' WHEN 7 THEN 'SMALLINT' WHEN 12 THEN 'DATE' WHEN 13 THEN 'TIME' WHEN 35 THEN 'TIMESTAMP' WHEN 37 THEN 'VARCHAR' ELSE 'UNKNOWN' END AS field_type FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE = f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'"/>-->
-            <inband query="SELECT r.RDB$FIELD_NAME,f.RDB$FIELD_TYPE FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE = f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'"/>
-            <blind query="SELECT r.RDB$FIELD_NAME FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE = f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'" query2="SELECT f.RDB$FIELD_TYPE FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE = f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s' AND r.RDB$FIELD_NAME='%s'" count="SELECT COUNT(r.RDB$FIELD_NAME) FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE = f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'"/>
+            <!--<inband query="SELECT r.RDB$FIELD_NAME,CASE f.RDB$FIELD_TYPE WHEN 261 THEN 'BLOB' WHEN 14 THEN 'CHAR' WHEN 40 THEN 'CSTRING' WHEN 11 THEN 'D_FLOAT' WHEN 27 THEN 'DOUBLE' WHEN 10 THEN 'FLOAT' WHEN 16 THEN 'INT64' WHEN 8 THEN 'INTEGER' WHEN 9 THEN 'QUAD' WHEN 7 THEN 'SMALLINT' WHEN 12 THEN 'DATE' WHEN 13 THEN 'TIME' WHEN 35 THEN 'TIMESTAMP' WHEN 37 THEN 'VARCHAR' ELSE 'UNKNOWN' END AS field_type FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE=f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'"/>-->
+            <inband query="SELECT r.RDB$FIELD_NAME,f.RDB$FIELD_TYPE FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE=f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'" condition="r.RDB$FIELD_NAME"/>
+            <blind query="SELECT r.RDB$FIELD_NAME FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE=f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'" query2="SELECT f.RDB$FIELD_TYPE FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE=f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s' AND r.RDB$FIELD_NAME='%s'" count="SELECT COUNT(r.RDB$FIELD_NAME) FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE=f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'" condition="r.RDB$FIELD_NAME"/>
         </columns>
         <dump_table>
             <inband query="SELECT %s FROM %s"/>
@@ -466,10 +466,13 @@
         </dump_table>
         <search_db/>
         <search_table>
-            <inband query="SELECT RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG = 0) AND %s" condition="RDB$RELATION_NAME" condition2=""/>
-            <blind query="" query2="SELECT FIRST 1 SKIP %d RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG = 0)" count="" count2="SELECT COUNT(RDB$RELATION_NAME) FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG = 0)" condition="RDB$RELATION_NAME" condition2=""/>
+            <inband query="SELECT RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG=0) AND %s" condition="RDB$RELATION_NAME" condition2=""/>
+            <blind query="" query2="SELECT FIRST 1 SKIP %d RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG=0)" count="" count2="SELECT COUNT(RDB$RELATION_NAME) FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG=0)" condition="RDB$RELATION_NAME" condition2=""/>
         </search_table>
-        <search_column/>
+        <search_column>
+            <inband query="SELECT r.RDB$RELATION_NAME FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE=f.RDB$FIELD_NAME WHERE %s" condition="r.RDB$FIELD_NAME" condition2="" condition3="r.RDB$RELATION_NAME"/>
+            <blind query="" query2="SELECT DISTINCT(r.RDB$RELATION_NAME) FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE=f.RDB$FIELD_NAME WHERE %s" count="" count2="SELECT COUNT(DISTINCT(r.RDB$RELATION_NAME)) FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE=f.RDB$FIELD_NAME WHERE %s" condition="r.RDB$FIELD_NAME" condition2="" condition3="r.RDB$RELATION_NAME"/>
+        </search_column>
    </dbms>
 
    <dbms value="SAP MaxDB">
diff --git a/lib/core/common.py b/lib/core/common.py
index 5b3877ed4..dec8d935f 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -75,6 +75,7 @@ from lib.core.enums import CHARSET_TYPE
 from lib.core.enums import CONTENT_STATUS
 from lib.core.enums import DBMS
 from lib.core.enums import EXPECTED
+from lib.core.enums import HASHDB_KEYS
 from lib.core.enums import HEURISTIC_TEST
 from lib.core.enums import HTTP_HEADER
 from lib.core.enums import HTTPMETHOD
@@ -558,6 +559,10 @@ class Backend(object):
             singleTimeWarnMessage("identified ('%s') and fingerprinted ('%s') DBMSes differ. If you experience problems in enumeration phase please rerun with '--flush-session'" % (Backend.getIdentifiedDbms(), Backend.getDbms()))
         return Backend.getIdentifiedDbms() == aliasToDbmsEnum(dbms)
 
+    @staticmethod
+    def isFork(fork):
+        return hashDBRetrieve(HASHDB_KEYS.DBMS_FORK) == fork
+
     @staticmethod
     def isDbmsWithin(aliases):
         return Backend.getDbms() is not None and Backend.getDbms().lower() in aliases
diff --git a/lib/core/settings.py b/lib/core/settings.py
index 0094e97d7..259e69774 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -18,7 +18,7 @@ from lib.core.enums import OS
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.4.2.27"
+VERSION = "1.4.2.28"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)
diff --git a/lib/core/testing.py b/lib/core/testing.py
index d0db8e85d..908b2a251 100644
--- a/lib/core/testing.py
+++ b/lib/core/testing.py
@@ -143,28 +143,46 @@ def bedTest():
     """
 
     TESTS = (
-        # DB2
-        ("-u 'http://testbed/db2/get_int.php?id=1' --flush-session --technique=B --is-dba --threads=4 --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("banner: 'DB2 v", "Database: DB2INST1", "Table: USERS", "5 entries", "ID", "NAME", "SURNAME", "luther", "blisset", "NULL", "Payload: id=1 AND ", "it looks like the back-end DBMS is 'IBM DB2'", "the back-end DBMS is IBM DB2", "current user is DBA: True", ": 'foobar'")),
-        ("-u 'http://testbed/db2/get_int.php?id=1' --flush-session --technique=U --is-dba --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("banner: 'DB2 v", "Database: DB2INST1", "Table: USERS", "5 entries", "ID", "NAME", "SURNAME", "luther", "blisset", "NULL", "Title: Generic UNION query (NULL) - 3 columns", "the back-end DBMS is IBM DB2", "appears to have 3 columns", "current user is DBA: True", ": 'foobar'")),
-        ("-u 'http://testbed/db2/get_int.php?id=1' --flush-session --technique=U --hex --banner --current-user --current-db --search -C surname --answers='dump=n'", ("banner: 'DB2 v", "current user (equivalent to database on IBM DB2): 'DB2INST1'", "current user: 'DB2INST1'", "[1 column]", "| SURNAME | VARCHAR(1000) |")),
+        # Firebird
+        ("-u 'http://testbed/firebird/get_int.php?id=1' --flush-session --technique=B --is-dba --threads=4 --dump --banner --sql-query=\"SELECT 'foobar'\"", ("banner: '2.5", "Table: USERS", "5 entries", "ID", "NAME", "SURNAME", "luther", "blisset", "NULL", "Payload: id=1 AND ", "possible DBMS: 'Firebird'", "the back-end DBMS is Firebird", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/firebird/get_int.php?id=1' --flush-session --technique=U --is-dba --dump --banner --sql-query=\"SELECT 'foobar'\"", ("banner: '2.5", "Table: USERS", "5 entries", "ID", "NAME", "SURNAME", "luther", "blisset", "NULL", "Title: Generic UNION query (NULL) - 3 columns", "the back-end DBMS is Firebird", "appears to have 3 columns", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/firebird/get_int.php?id=1' --flush-session --technique=U --hex --banner --current-user --search -C surname --answers='dump=n'", ("banner: '2.5", "current user: 'SYSDBA'", "[1 column]", "| SURNAME | VARCHAR |")),
 
         # Altibase
         ("-u 'http://testbed/altibase/get_int.php?id=1' --flush-session --technique=B --is-dba --threads=4 --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("x86_64-unknown-linux-gnu", "Database: SYS", "Table: TESTUSERS", "5 entries", "ID", "NAME", "SURNAME", "luther", "blisset", "NULL", "Payload: id=1 AND ", "back-end DBMS could be 'Altibase'", "the back-end DBMS is Altibase", "current user is DBA: True", ": 'foobar'")),
         ("-u 'http://testbed/altibase/get_int.php?id=1' --flush-session --technique=U --is-dba --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("x86_64-unknown-linux-gnu", "Database: SYS", "Table: TESTUSERS", "5 entries", "ID", "NAME", "SURNAME", "luther", "blisset", "NULL", "Title: Generic UNION query (NULL) - 3 columns", "the back-end DBMS is Altibase", "appears to have 3 columns", "current user is DBA: True", ": 'foobar'")),
         ("-u 'http://testbed/altibase/get_int.php?id=1' --flush-session --technique=U --hex --banner --current-user --current-db --search -C surname --answers='dump=n'", ("x86_64-unknown-linux-gnu", "current user (equivalent to database on Altibase): 'SYS'", "current user: 'SYS'", "[1 column]", "| SURNAME | VARCHAR |")),
 
+        # CockroachDB
+        ("-u 'http://testbed/cockroachdb/get_int.php?id=1' --flush-session --technique=B --is-dba --threads=4 --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("x86_64-unknown-linux-gnu", "CockroachDB fork", "Database: public", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Payload: id=1 AND ", "back-end DBMS could be 'PostgreSQL'", "the back-end DBMS is PostgreSQL", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/cockroachdb/get_int.php?id=1' --flush-session --technique=U --is-dba --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("x86_64-unknown-linux-gnu", "CockroachDB fork", "Database: public", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Title: Generic UNION query (NULL) - 3 columns", "the back-end DBMS is PostgreSQL", "appears to have 3 columns", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/cockroachdb/get_int.php?id=1' --flush-session --technique=E --is-dba --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("x86_64-unknown-linux-gnu", "CockroachDB fork", "Database: public", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Title: PostgreSQL AND error-based", "the back-end DBMS is PostgreSQL", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/cockroachdb/get_int.php?id=1' --flush-session --hex --banner --current-user --current-db --search -C surname --answers='dump=n'", ("Title: AND boolean-based blind", "Title: PostgreSQL AND error-based", "Title: PostgreSQL > 8.1 stacked queries", "Title: PostgreSQL > 8.1 AND time-based blind", "Title: Generic UNION query (NULL) - 3 columns", "x86_64-unknown-linux-gnu", "current schema (equivalent to database on PostgreSQL): 'public'", "current user: 'root'", "[1 column]", "| surname | varchar |")),
+
         # CrateDB
         ("-u 'http://testbed/cratedb/get_int.php?id=1' --flush-session --technique=B --is-dba --threads=4 --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("4.0.10", "Database: doc", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Payload: id=1 AND ", "back-end DBMS could be 'CrateDB'", "the back-end DBMS is CrateDB", "current user is DBA: True", ": 'foobar'")),
         ("-u 'http://testbed/cratedb/get_int.php?id=1' --flush-session --technique=B --hex --banner --current-user --current-db --search -C surname --answers='dump=n'", ("4.0.10", "current schema (equivalent to database on CrateDB): 'doc'", "current user: 'crate'", "[1 column]", "| surname |")),
 
-        # CockroachDB
-        ("-u 'http://testbed/cockroachdb/get_int.php?id=1' --flush-session --technique=B --is-dba --threads=4 --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("x86_64-unknown-linux-gnu", "CockroachDB fork", "Database: public", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Payload: id=1 AND ", "back-end DBMS could be 'PostgreSQL'", "the back-end DBMS is PostgreSQL", "current user is DBA: True", ": 'foobar'")),
-        ("-u 'http://testbed/cockroachdb/get_int.php?id=1' --flush-session --technique=U --is-dba --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("x86_64-unknown-linux-gnu", "CockroachDB fork", "Database: public", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Title: Generic UNION query (NULL) - 3 columns", "the back-end DBMS is PostgreSQL", "appears to have 3 columns", "current user is DBA: True", ": 'foobar'")),
-        ("-u 'http://testbed/cockroachdb/get_int.php?id=1' --flush-session --hex --banner --current-user --current-db --search -C surname --answers='dump=n'", ("Title: AND boolean-based blind", "Title: PostgreSQL AND error-based", "Title: PostgreSQL > 8.1 stacked queries", "Title: PostgreSQL > 8.1 AND time-based blind", "Title: Generic UNION query (NULL) - 3 columns", "x86_64-unknown-linux-gnu", "current schema (equivalent to database on PostgreSQL): 'public'", "current user: 'root'", "[1 column]", "| surname | varchar |")),
+        # Drizzle
+        ("-u 'http://testbed/drizzle/get_int.php?id=1' --flush-session --technique=B --is-dba --threads=4 --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("7.1.36-stable", "Drizzle fork", "Database: testdb", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Payload: id=1 AND ", "it looks like the back-end DBMS is 'MySQL'", "the back-end DBMS is MySQL", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/drizzle/get_int.php?id=1' --flush-session --technique=U --is-dba --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("7.1.36-stable", "Drizzle fork", "Database: testdb", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Title: Generic UNION query (NULL) - 3 columns", "the back-end DBMS is MySQL", "appears to have 3 columns", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/drizzle/get_int.php?id=1' --flush-session --hex --banner --current-user --current-db --search -C surname --answers='dump=n'", ("Title: AND boolean-based blind", "Title: MySQL >= 5.0.12 AND time-based blind", "Title: Generic UNION query (NULL) - 3 columns", "7.1.36-stable", "current database: 'testdb'", "current user: 'root'", "[1 column]", "| surname | VARCHAR |")),
+
+        # IBM DB2
+        ("-u 'http://testbed/db2/get_int.php?id=1' --flush-session --technique=B --is-dba --threads=4 --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("banner: 'DB2 v", "Database: DB2INST1", "Table: USERS", "5 entries", "ID", "NAME", "SURNAME", "luther", "blisset", "NULL", "Payload: id=1 AND ", "it looks like the back-end DBMS is 'IBM DB2'", "the back-end DBMS is IBM DB2", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/db2/get_int.php?id=1' --flush-session --technique=U --is-dba --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("banner: 'DB2 v", "Database: DB2INST1", "Table: USERS", "5 entries", "ID", "NAME", "SURNAME", "luther", "blisset", "NULL", "Title: Generic UNION query (NULL) - 3 columns", "the back-end DBMS is IBM DB2", "appears to have 3 columns", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/db2/get_int.php?id=1' --flush-session --technique=U --hex --banner --current-user --current-db --search -C surname --answers='dump=n'", ("banner: 'DB2 v", "current user (equivalent to database on IBM DB2): 'DB2INST1'", "current user: 'DB2INST1'", "[1 column]", "| SURNAME | VARCHAR(1000) |")),
+
+        # MariaDB
+        ("-u 'http://testbed/mariadb/get_int.php?id=1' --flush-session --technique=B --is-dba --threads=4 --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("10.4.12-MariaDB-1:10.4.12+maria~bionic", "MariaDB fork", "Database: testdb", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Payload: id=1 AND ", "it looks like the back-end DBMS is 'MySQL'", "the back-end DBMS is MySQL", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/mariadb/get_int.php?id=1' --flush-session --technique=U --is-dba --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("10.4.12-MariaDB-1:10.4.12+maria~bionic", "MariaDB fork", "Database: testdb", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Title: Generic UNION query (NULL) - 3 columns", "the back-end DBMS is MySQL", "appears to have 3 columns", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/mariadb/get_int.php?id=1' --flush-session --technique=E --is-dba --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("10.4.12-MariaDB-1:10.4.12+maria~bionic", "MariaDB fork", "Database: testdb", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Title: MySQL >= 5.0 AND error-based", "the back-end DBMS is MySQL", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/mariadb/get_int.php?id=1' --flush-session --hex --banner --current-user --current-db --search -C surname --answers='dump=n'", ("Title: AND boolean-based blind", "Title: MySQL >= 5.0 AND error-based", "Title: MySQL >= 5.0.12 AND time-based blind", "Title: Generic UNION query (NULL) - 3 columns", "10.4.12-MariaDB-1:10.4.12+maria~bionic", "current database: 'testdb'", "current user: 'root@%'", "[1 column]", "| surname | varchar(1000) |")),
 
         # MySQL
         ("-u 'http://testbed/mysql/get_int.php?id=1' --flush-session --technique=B --is-dba --threads=4 --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("8.0.19", "Database: testdb", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Payload: id=1 AND ", "it looks like the back-end DBMS is 'MySQL'", "the back-end DBMS is MySQL", "current user is DBA: True", ": 'foobar'")),
         ("-u 'http://testbed/mysql/get_int.php?id=1' --flush-session --technique=U --is-dba --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("8.0.19", "Database: testdb", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Title: Generic UNION query (NULL) - 3 columns", "the back-end DBMS is MySQL", "appears to have 3 columns", "current user is DBA: True", ": 'foobar'")),
+        ("-u 'http://testbed/mysql/get_int.php?id=1' --flush-session --technique=E --is-dba --dump -D CD --banner --sql-query=\"SELECT 'foobar'\"", ("8.0.19", "Database: testdb", "Table: testusers", "5 entries", "id", "name", "surname", "luther", "blisset", "NULL", "Title: MySQL >= 5.0 AND error-based", "the back-end DBMS is MySQL", "appears to have 3 columns", "current user is DBA: True", ": 'foobar'")),
         ("-u 'http://testbed/mysql/get_int.php?id=1' --flush-session --hex --banner --current-user --current-db --search -C surname --answers='dump=n'", ("Title: AND boolean-based blind", "Title: MySQL >= 5.1 AND error-based", "Title: MySQL >= 5.0.12 AND time-based blind", "Title: Generic UNION query (NULL) - 3 columns", "8.0.19", "current database: 'testdb'", "current user: 'root@%'", "[1 column]", "| surname | varchar(1000) |")),
 
         # PostgreSQL
diff --git a/plugins/dbms/firebird/enumeration.py b/plugins/dbms/firebird/enumeration.py
index 248f3dc12..d43ffdc8b 100644
--- a/plugins/dbms/firebird/enumeration.py
+++ b/plugins/dbms/firebird/enumeration.py
@@ -27,12 +27,6 @@ class Enumeration(GenericEnumeration):
 
         return []
 
-    def searchColumn(self):
-        warnMsg = "on Firebird it is not possible to search columns"
-        logger.warn(warnMsg)
-
-        return []
-
     def getHostname(self):
         warnMsg = "on Firebird it is not possible to enumerate the hostname"
         logger.warn(warnMsg)
diff --git a/plugins/generic/databases.py b/plugins/generic/databases.py
index 6eacd1a0c..e88b957ba 100644
--- a/plugins/generic/databases.py
+++ b/plugins/generic/databases.py
@@ -43,6 +43,7 @@ from lib.core.dicts import INFORMIX_TYPES
 from lib.core.enums import CHARSET_TYPE
 from lib.core.enums import DBMS
 from lib.core.enums import EXPECTED
+from lib.core.enums import FORK
 from lib.core.enums import PAYLOAD
 from lib.core.exception import SqlmapMissingMandatoryOptionException
 from lib.core.exception import SqlmapNoneDataException
@@ -607,6 +608,9 @@ class Databases(object):
                     query = rootQuery.inband.query % (unsafeSQLIdentificatorNaming(tbl), unsafeSQLIdentificatorNaming(conf.db))
                     query += condQuery
 
+                    if Backend.isFork(FORK.DRIZZLE):
+                        query = query.replace("column_type", "data_type")
+
                 elif Backend.getIdentifiedDbms() in (DBMS.ORACLE, DBMS.DB2, DBMS.DERBY, DBMS.ALTIBASE, DBMS.MIMERSQL):
                     query = rootQuery.inband.query % (unsafeSQLIdentificatorNaming(tbl.upper()), unsafeSQLIdentificatorNaming(conf.db.upper()))
                     query += condQuery
@@ -1016,7 +1020,10 @@ class Databases(object):
         rootQuery = queries[Backend.getIdentifiedDbms()].statements
 
         if any(isTechniqueAvailable(_) for _ in (PAYLOAD.TECHNIQUE.UNION, PAYLOAD.TECHNIQUE.ERROR, PAYLOAD.TECHNIQUE.QUERY)) or conf.direct:
-            query = rootQuery.inband.query
+            if Backend.isFork(FORK.DRIZZLE):
+                query = rootQuery.inband.query2
+            else:
+                query = rootQuery.inband.query
 
             while True:
                 values = inject.getValue(query, blind=False, time=False)
@@ -1039,6 +1046,10 @@ class Databases(object):
             logger.info(infoMsg)
 
             query = rootQuery.blind.count
+
+            if Backend.isFork(FORK.DRIZZLE):
+                query = query.replace("INFORMATION_SCHEMA", "DATA_DICTIONARY")
+
             count = inject.getValue(query, union=False, error=False, expected=EXPECTED.INT, charsetType=CHARSET_TYPE.DIGITS)
 
             if count == 0:
@@ -1063,6 +1074,10 @@ class Databases(object):
 
                 if isNoneValue(value):
                     query = rootQuery.blind.query % index
+
+                    if Backend.isFork(FORK.DRIZZLE):
+                        query = query.replace("INFORMATION_SCHEMA", "DATA_DICTIONARY")
+
                     value = unArrayizeValue(inject.getValue(query, union=False, error=False))
 
                 if not isNoneValue(value):
diff --git a/plugins/generic/search.py b/plugins/generic/search.py
index 8b537a37e..db717f4a4 100644
--- a/plugins/generic/search.py
+++ b/plugins/generic/search.py
@@ -345,6 +345,8 @@ class Search(object):
     def searchColumn(self):
         bruteForce = False
 
+        self.forceDbmsEnum()
+
         if Backend.isDbms(DBMS.MYSQL) and not kb.data.has_information_schema:
             errMsg = "information_schema not available, "
             errMsg += "back-end DBMS is MySQL < 5.0"
@@ -406,24 +408,26 @@ class Search(object):
 
             foundCols[column] = {}
 
-            if conf.tbl:
-                _ = conf.tbl.split(',')
-                whereTblsQuery = " AND (" + " OR ".join("%s = '%s'" % (tblCond, unsafeSQLIdentificatorNaming(tbl)) for tbl in _) + ")"
-                infoMsgTbl = " for table%s '%s'" % ("s" if len(_) > 1 else "", ", ".join(unsafeSQLIdentificatorNaming(tbl) for tbl in _))
+            if tblCond:
+                if conf.tbl:
+                    _ = conf.tbl.split(',')
+                    whereTblsQuery = " AND (" + " OR ".join("%s = '%s'" % (tblCond, unsafeSQLIdentificatorNaming(tbl)) for tbl in _) + ")"
+                    infoMsgTbl = " for table%s '%s'" % ("s" if len(_) > 1 else "", ", ".join(unsafeSQLIdentificatorNaming(tbl) for tbl in _))
 
             if conf.db == CURRENT_DB:
                 conf.db = self.getCurrentDb()
 
-            if conf.db:
-                _ = conf.db.split(',')
-                whereDbsQuery = " AND (" + " OR ".join("%s = '%s'" % (dbCond, unsafeSQLIdentificatorNaming(db)) for db in _) + ")"
-                infoMsgDb = " in database%s '%s'" % ("s" if len(_) > 1 else "", ", ".join(unsafeSQLIdentificatorNaming(db) for db in _))
-            elif conf.excludeSysDbs:
-                whereDbsQuery = "".join(" AND %s != '%s'" % (dbCond, unsafeSQLIdentificatorNaming(db)) for db in self.excludeDbsList)
-                msg = "skipping system database%s '%s'" % ("s" if len(self.excludeDbsList) > 1 else "", ", ".join(unsafeSQLIdentificatorNaming(db) for db in self.excludeDbsList))
-                logger.info(msg)
-            else:
-                infoMsgDb = " across all databases"
+            if dbCond:
+                if conf.db:
+                    _ = conf.db.split(',')
+                    whereDbsQuery = " AND (" + " OR ".join("%s = '%s'" % (dbCond, unsafeSQLIdentificatorNaming(db)) for db in _) + ")"
+                    infoMsgDb = " in database%s '%s'" % ("s" if len(_) > 1 else "", ", ".join(unsafeSQLIdentificatorNaming(db) for db in _))
+                elif conf.excludeSysDbs:
+                    whereDbsQuery = "".join(" AND %s != '%s'" % (dbCond, unsafeSQLIdentificatorNaming(db)) for db in self.excludeDbsList)
+                    msg = "skipping system database%s '%s'" % ("s" if len(self.excludeDbsList) > 1 else "", ", ".join(unsafeSQLIdentificatorNaming(db) for db in self.excludeDbsList))
+                    logger.info(msg)
+                else:
+                    infoMsgDb = " across all databases"
 
             logger.info("%s%s%s" % (infoMsg, infoMsgTbl, infoMsgDb))
 
@@ -446,6 +450,9 @@ class Search(object):
                         for tbl in conf.tbl.split(','):
                             values.append([safeSQLIdentificatorNaming(db), safeSQLIdentificatorNaming(tbl, True)])
 
+                if Backend.getIdentifiedDbms() in (DBMS.FIREBIRD,):
+                    values = [(conf.db, value) for value in arrayizeValue(values)]
+
                 for db, tbl in filterPairValues(values):
                     db = safeSQLIdentificatorNaming(db)
                     tbls = tbl.split(',') if not isNoneValue(tbl) else []
@@ -538,8 +545,12 @@ class Search(object):
                         logger.info(infoMsg)
 
                         query = rootQuery.blind.count2
-                        query = query % unsafeSQLIdentificatorNaming(db)
-                        query += " AND %s" % colQuery
+                        if not re.search(r"(?i)%s\Z" % METADB_SUFFIX, db or ""):
+                            query = query % unsafeSQLIdentificatorNaming(db)
+                            query += " AND %s" % colQuery
+                        else:
+                            query = query % colQuery
+
                         query += whereTblsQuery
 
                         count = inject.getValue(query, union=False, error=False, expected=EXPECTED.INT, charsetType=CHARSET_TYPE.DIGITS)
@@ -559,7 +570,9 @@ class Search(object):
                         for index in indexRange:
                             query = rootQuery.blind.query2
 
-                            if query.endswith("'%s')"):
+                            if re.search(r"(?i)%s\Z" % METADB_SUFFIX, db or ""):
+                                query = query % (colQuery + whereTblsQuery)
+                            elif query.endswith("'%s')"):
                                 query = query[:-1] + " AND %s)" % (colQuery + whereTblsQuery)
                             elif " ORDER BY " in query:
                                 query = query.replace(" ORDER BY ", " AND %s ORDER BY " % (colQuery + whereTblsQuery))
diff --git a/plugins/generic/users.py b/plugins/generic/users.py
index 39a866f4e..1ea627eb1 100644
--- a/plugins/generic/users.py
+++ b/plugins/generic/users.py
@@ -36,6 +36,7 @@ from lib.core.dicts import PGSQL_PRIVS
 from lib.core.enums import CHARSET_TYPE
 from lib.core.enums import DBMS
 from lib.core.enums import EXPECTED
+from lib.core.enums import FORK
 from lib.core.enums import PAYLOAD
 from lib.core.exception import SqlmapNoneDataException
 from lib.core.exception import SqlmapUserQuitException
@@ -75,16 +76,22 @@ class Users(object):
         infoMsg = "testing if current user is DBA"
         logger.info(infoMsg)
 
+        query = None
+
         if Backend.isDbms(DBMS.MYSQL):
             self.getCurrentUser()
-            query = queries[Backend.getIdentifiedDbms()].is_dba.query % (kb.data.currentUser.split("@")[0] if kb.data.currentUser else None)
+            if Backend.isFork(FORK.DRIZZLE):
+                kb.data.isDba = "root" in (kb.data.currentUser or "")
+            elif kb.data.currentUser:
+                query = queries[Backend.getIdentifiedDbms()].is_dba.query % kb.data.currentUser.split("@")[0]
         elif Backend.getIdentifiedDbms() in (DBMS.MSSQL, DBMS.SYBASE) and user is not None:
             query = queries[Backend.getIdentifiedDbms()].is_dba.query2 % user
         else:
             query = queries[Backend.getIdentifiedDbms()].is_dba.query
 
-        query = agent.forgeCaseStatement(query)
-        kb.data.isDba = inject.checkBooleanExpression(query) or False
+        if query:
+            query = agent.forgeCaseStatement(query)
+            kb.data.isDba = inject.checkBooleanExpression(query) or False
 
         return kb.data.isDba
 
@@ -98,10 +105,13 @@ class Users(object):
         condition |= (Backend.isDbms(DBMS.MYSQL) and not kb.data.has_information_schema)
 
         if any(isTechniqueAvailable(_) for _ in (PAYLOAD.TECHNIQUE.UNION, PAYLOAD.TECHNIQUE.ERROR, PAYLOAD.TECHNIQUE.QUERY)) or conf.direct:
-            if condition:
+            if Backend.isFork(FORK.DRIZZLE):
+                query = rootQuery.inband.query3
+            elif condition:
                 query = rootQuery.inband.query2
             else:
                 query = rootQuery.inband.query
+
             values = inject.getValue(query, blind=False, time=False)
 
             if not isNoneValue(values):
@@ -115,7 +125,9 @@ class Users(object):
             infoMsg = "fetching number of database users"
             logger.info(infoMsg)
 
-            if condition:
+            if Backend.isFork(FORK.DRIZZLE):
+                query = rootQuery.blind.count3
+            elif condition:
                 query = rootQuery.blind.count2
             else:
                 query = rootQuery.blind.count
@@ -134,10 +146,13 @@ class Users(object):
             for index in indexRange:
                 if Backend.getIdentifiedDbms() in (DBMS.SYBASE, DBMS.MAXDB):
                     query = rootQuery.blind.query % (kb.data.cachedUsers[-1] if kb.data.cachedUsers else " ")
+                elif Backend.isFork(FORK.DRIZZLE):
+                    query = rootQuery.blind.query3 % index
                 elif condition:
                     query = rootQuery.blind.query2 % index
                 else:
                     query = rootQuery.blind.query % index
+
                 user = unArrayizeValue(inject.getValue(query, union=False, error=False))
 
                 if user: