diff --git a/cmd/ast/param.go b/cmd/ast/param.go
index 1fb1cb40..8d5a5b94 100644
--- a/cmd/ast/param.go
+++ b/cmd/ast/param.go
@@ -78,7 +78,7 @@ outer:
 					}
 				}
 			} else {
-				typer = &ColumnType{ColumnName: text}
+				typer = &ColumnType{ColumnName: strings.ToLower(text)}
 			}
 		}
 
diff --git a/cmd/ast/testdata/case009/output.yaml b/cmd/ast/testdata/case009/output.yaml
index 13853fc5..414415c6 100644
--- a/cmd/ast/testdata/case009/output.yaml
+++ b/cmd/ast/testdata/case009/output.yaml
@@ -6,7 +6,7 @@ parameters:
     name: tID
     required: true
     typer:
-      columnname: T1.ID
+      columnname: t1.id
 source: |-
   SELECT *, (
       SELECT abc
diff --git a/cmd/columns.go b/cmd/columns.go
index 55781c1b..f3b5df9f 100644
--- a/cmd/columns.go
+++ b/cmd/columns.go
@@ -5,6 +5,9 @@ import (
 	"database/sql"
 	"fmt"
 	"github.com/viant/sqlx/io"
+	rdata "github.com/viant/toolbox/data"
+	"github.com/viant/velty/ast/expr"
+	"github.com/viant/velty/parser"
 	"strings"
 )
 
@@ -30,9 +33,29 @@ func (s *serverBuilder) updateTableColumnTypes(ctx context.Context, table *Table
 }
 
 func (s *serverBuilder) updatedColumns(table *Table, prefix, tableName string, db *sql.DB) {
-	SQL := "SELECT * FROM " + tableName + " WHERE 1 = 0"
+	parse, err := parser.Parse([]byte(tableName))
+	var args []interface{}
+	expandMap := &rdata.Map{}
+
+	if err == nil {
+		if anIndex := strings.Index(tableName, "SELECT"); anIndex != -1 {
+
+			for _, statement := range parse.Stmt {
+				switch actual := statement.(type) {
+				case *expr.Select:
+					expandMap.SetValue(actual.FullName[1:], "?")
+					args = append(args, 0)
+				}
+			}
+
+			tableName = expandMap.ExpandAsText(tableName)
+		}
+	}
+
+	SQL := "SELECT * FROM " + tableName + " t WHERE 1 = 0"
+
 	fmt.Printf("checking %v ...\n", tableName)
-	query, err := db.QueryContext(context.Background(), SQL)
+	query, err := db.QueryContext(context.Background(), SQL, args...)
 	if err != nil {
 		s.logger.Write([]byte(fmt.Sprintf("error occured while updating table %v columns: %v", tableName, err)))
 		return
@@ -55,6 +78,7 @@ func (s *serverBuilder) updatedColumns(table *Table, prefix, tableName string, d
 			if key != "" {
 				key += "."
 			}
+
 			key += column.Name()
 			table.ColumnTypes[strings.ToLower(key)] = columnType
 		}
diff --git a/view/connector.go b/view/connector.go
index aeab54ef..8c88ea9f 100644
--- a/view/connector.go
+++ b/view/connector.go
@@ -26,7 +26,7 @@ type (
 		//TODO add secure password storage
 		db          func() (*sql.DB, error)
 		initialized bool
-		DBConfig
+		*DBConfig
 		mux sync.Mutex
 	}
 
@@ -35,6 +35,7 @@ type (
 		ConnMaxIdleTimeMs int `json:",omitempty" yaml:",omitempty"`
 		MaxOpenConns      int `json:",omitempty" yaml:",omitempty"`
 		ConnMaxLifetimeMs int `json:",omitempty" yaml:",omitempty"`
+		TimeoutTime       int `json:",omitempty" yaml:",omitempty"`
 	}
 )
 
@@ -67,6 +68,10 @@ func (c *Connector) Init(ctx context.Context, connectors Connectors) error {
 		c.inherit(connector)
 	}
 
+	if c.DBConfig == nil {
+		c.DBConfig = &DBConfig{}
+	}
+
 	if err := c.Validate(); err != nil {
 		return err
 	}
@@ -98,7 +103,7 @@ func (c *Connector) DB(ctx context.Context) (*sql.DB, error) {
 	}
 
 	c.mux.Lock()
-	c.db = aDbPool.DB(ctx, c.Driver, dsn, &c.DBConfig)
+	c.db = aDbPool.DB(ctx, c.Driver, dsn, c.DBConfig)
 	aDB, err := c.db()
 	c.mux.Unlock()
 
@@ -142,6 +147,10 @@ func (c *Connector) inherit(connector *Connector) {
 	if c.Name == "" {
 		c.Name = connector.Name
 	}
+
+	if c.DBConfig == nil {
+		c.DBConfig = connector.DBConfig
+	}
 }
 
 func (c *Connector) setDriverOptions(secret *scy.Secret) {
diff --git a/view/pool.go b/view/pool.go
index 8fcde855..e7377dc9 100644
--- a/view/pool.go
+++ b/view/pool.go
@@ -170,6 +170,11 @@ func (d *db) ctxWithTimeout(duration time.Duration) context.Context {
 
 func (p *dbPool) DB(ctx context.Context, driver, dsn string, config *DBConfig) func() (*sql.DB, error) {
 	builder := &strings.Builder{}
+
+	if config == nil {
+		config = &DBConfig{}
+	}
+
 	builder.WriteString(strconv.Itoa(config.ConnMaxLifetimeMs))
 	builder.WriteByte('#')
 	builder.WriteString(strconv.Itoa(config.MaxIdleConns))
diff --git a/view/sql.go b/view/sql.go
index 5fc60a65..051c7e22 100644
--- a/view/sql.go
+++ b/view/sql.go
@@ -155,11 +155,7 @@ func detectColumnsSQL(source string, v *View) (string, []interface{}, error) {
 
 	SQL := sb.String()
 	if source != v.Name && source != v.Table {
-		discover := metadata.EnrichWithDiscover(source, false)
-		replacement := rdata.Map{}
-		replacement.Put(keywords.AndCriteria[1:], "\n\n AND 1=0 ")
-		replacement.Put(keywords.WhereCriteria[1:], "\n\n WHERE 1=0 ")
-		SQL = replacement.ExpandAsText(discover)
+		SQL = ExpandWithFalseCondition(source)
 	}
 
 	var placeholders []interface{}
@@ -172,6 +168,15 @@ func detectColumnsSQL(source string, v *View) (string, []interface{}, error) {
 	return SQL, placeholders, nil
 }
 
+func ExpandWithFalseCondition(source string) string {
+	discover := metadata.EnrichWithDiscover(source, false)
+	replacement := rdata.Map{}
+	replacement.Put(keywords.AndCriteria[1:], "\n\n AND 1=0 ")
+	replacement.Put(keywords.WhereCriteria[1:], "\n\n WHERE 1=0 ")
+	SQL := replacement.ExpandAsText(discover)
+	return SQL
+}
+
 func expandWithZeroValues(SQL string, template *Template) (string, error) {
 	expandMap := rdata.Map{}
 	for _, parameter := range template.Parameters {