diff --git a/internal/populatedb/database_type.go b/internal/populatedb/database_type.go
index 9ccb3e4..4b8022b 100644
--- a/internal/populatedb/database_type.go
+++ b/internal/populatedb/database_type.go
@@ -7,31 +7,30 @@ import (
 	"time"
 
 	"github.com/brianvoe/gofakeit/v6"
+	tblsschema "github.com/k1LoW/tbls/schema"
 )
 
 var ErrNotSupportDatabaseType = errors.New("not support database type")
 
-// varchar(123)
-// timestamp
-func ParseDatabaseType(databaseTypeStr string) (DatabaseType, error) {
+func ParseDatabaseType(column *tblsschema.Column) (DatabaseType, error) {
 	switch {
-	case strings.HasPrefix(strings.ToLower(databaseTypeStr), "varchar"):
+	case strings.HasPrefix(strings.ToLower(column.Type), "varchar"):
 		dtVarchar := DTVarchar{}
-		if _, err := fmt.Sscanf(databaseTypeStr, "varchar(%d)", &dtVarchar.Length); err != nil {
-			return nil, fmt.Errorf("fmt: failed to sscanf [%s]: %w", databaseTypeStr, err)
+		if _, err := fmt.Sscanf(column.Type, "varchar(%d)", &dtVarchar.Length); err != nil {
+			return nil, fmt.Errorf("fmt: failed to sscanf [%s]: %w", column.Type, err)
 		}
 
 		return &dtVarchar, nil
-	case strings.HasPrefix(strings.ToLower(databaseTypeStr), "bigint"):
+	case strings.HasPrefix(strings.ToLower(column.Type), "bigint"):
 		return &DTBigint{}, nil
-	case strings.HasPrefix(strings.ToLower(databaseTypeStr), "int"):
+	case strings.HasPrefix(strings.ToLower(column.Type), "int"):
 		return &DTInt{}, nil
-	case strings.EqualFold(databaseTypeStr, "timestamp"):
+	case strings.EqualFold(column.Type, "timestamp"):
 		return &DTTimestamp{}, nil
-	case strings.EqualFold(databaseTypeStr, "json"):
+	case strings.EqualFold(column.Type, "json"):
 		return &DTJSON{}, nil
 	default:
-		return nil, fmt.Errorf("not support database type [%s]: %w", databaseTypeStr, ErrNotSupportDatabaseType)
+		return nil, fmt.Errorf("not support database type [%s]: %w", column.Type, ErrNotSupportDatabaseType)
 	}
 }
 
diff --git a/internal/populatedb/populatedb.go b/internal/populatedb/populatedb.go
index d67eb93..e292359 100644
--- a/internal/populatedb/populatedb.go
+++ b/internal/populatedb/populatedb.go
@@ -225,7 +225,7 @@ func (p *populator) prepareInsert(tableName string) ([]string, []string, []func(
 	questionMarks := make([]string, 0, len(table.Columns))
 	argFns := make([]func() any, 0, len(table.Columns))
 	for _, column := range table.Columns {
-		dt, err := ParseDatabaseType(column.Type)
+		dt, err := ParseDatabaseType(column)
 		if err != nil {
 			return nil, nil, nil, fmt.Errorf("failed to parse database type [%s]: %w", column.Type, err)
 		}