diff --git a/workflow/engine/classes/model/map/ProcessVariablesMapBuilder.php b/workflow/engine/classes/model/map/ProcessVariablesMapBuilder.php
index b1cf8d837..06391afec 100644
--- a/workflow/engine/classes/model/map/ProcessVariablesMapBuilder.php
+++ b/workflow/engine/classes/model/map/ProcessVariablesMapBuilder.php
@@ -69,17 +69,17 @@ class ProcessVariablesMapBuilder
 
         $tMap->addColumn('PRJ_UID', 'PrjUid', 'string', CreoleTypes::VARCHAR, true, 32);
 
-        $tMap->addColumn('VAR_NAME', 'VarName', 'string', CreoleTypes::VARCHAR, false, 60);
+        $tMap->addColumn('VAR_NAME', 'VarName', 'string', CreoleTypes::VARCHAR, false, 255);
 
         $tMap->addColumn('VAR_FIELD_TYPE', 'VarFieldType', 'string', CreoleTypes::VARCHAR, false, 32);
 
         $tMap->addColumn('VAR_FIELD_SIZE', 'VarFieldSize', 'int', CreoleTypes::INTEGER, false, null);
 
-        $tMap->addColumn('VAR_LABEL', 'VarLabel', 'string', CreoleTypes::VARCHAR, false, 64);
+        $tMap->addColumn('VAR_LABEL', 'VarLabel', 'string', CreoleTypes::VARCHAR, false, 255);
 
         $tMap->addColumn('VAR_DBCONNECTION', 'VarDbconnection', 'string', CreoleTypes::VARCHAR, false, 32);
 
-        $tMap->addColumn('VAR_SQL', 'VarSql', 'string', CreoleTypes::VARCHAR, false, 512);
+        $tMap->addColumn('VAR_SQL', 'VarSql', 'string', CreoleTypes::LONGVARCHAR, false, null);
 
         $tMap->addColumn('VAR_NULL', 'VarNull', 'int', CreoleTypes::TINYINT, false, 32);
 
diff --git a/workflow/engine/config/schema.xml b/workflow/engine/config/schema.xml
index f25081eff..44328e75d 100755
--- a/workflow/engine/config/schema.xml
+++ b/workflow/engine/config/schema.xml
@@ -3793,12 +3793,12 @@
     <table name="PROCESS_VARIABLES">
         <column name="VAR_UID" type="VARCHAR" size="32" required="true" primaryKey="true" />
         <column name="PRJ_UID" type="VARCHAR" size="32" required="true"/>
-        <column name="VAR_NAME" type="VARCHAR" size="60" default=""/>
+        <column name="VAR_NAME" type="VARCHAR" size="255" default=""/>
         <column name="VAR_FIELD_TYPE" type="VARCHAR" size="32" default=""/>
         <column name="VAR_FIELD_SIZE" type="INTEGER" />
-        <column name="VAR_LABEL" type="VARCHAR" size="64" default=""/>
+        <column name="VAR_LABEL" type="VARCHAR" size="255" default=""/>
         <column name="VAR_DBCONNECTION" type="VARCHAR" size="32" />
-        <column name="VAR_SQL" type="VARCHAR" size="512" />
+        <column name="VAR_SQL" type="LONGVARCHAR"/>
         <column name="VAR_NULL" type="TINYINT" size="32" default="0"/>
         <column name="VAR_DEFAULT" type="VARCHAR" size="32" default=""/>
         <column name="VAR_ACCEPTED_VALUES" type="LONGVARCHAR"/>
diff --git a/workflow/engine/data/mysql/schema.sql b/workflow/engine/data/mysql/schema.sql
index 5c66b081d..24e578581 100755
--- a/workflow/engine/data/mysql/schema.sql
+++ b/workflow/engine/data/mysql/schema.sql
@@ -2071,12 +2071,12 @@ CREATE TABLE `PROCESS_VARIABLES`
 (
 	`VAR_UID` VARCHAR(32)  NOT NULL,
 	`PRJ_UID` VARCHAR(32)  NOT NULL,
-	`VAR_NAME` VARCHAR(60) default '',
+	`VAR_NAME` VARCHAR(255) default '',
 	`VAR_FIELD_TYPE` VARCHAR(32) default '',
 	`VAR_FIELD_SIZE` INTEGER,
-	`VAR_LABEL` VARCHAR(64) default '',
+	`VAR_LABEL` VARCHAR(255) default '',
 	`VAR_DBCONNECTION` VARCHAR(32),
-	`VAR_SQL` VARCHAR(512),
+	`VAR_SQL` MEDIUMTEXT,
 	`VAR_NULL` TINYINT(32) default 0,
 	`VAR_DEFAULT` VARCHAR(32) default '',
 	`VAR_ACCEPTED_VALUES` MEDIUMTEXT,