public void setSchemaPattern(@Nullable String schemaPattern) {
        this.schemaPattern = schemaPattern;
    }
Set the schema pattern filter to be used

@param schemaPattern a schema name pattern; must match the schema name
       as it is stored in the database; "" retrieves those without a schema;
       {@code null} means that the schema name should not be used to narrow
       the search (default: null)
querydsl-sql-codegen/src/main/java/com/querydsl/sql/codegen/MetaDataExporter.java