in src/main/java/software/amazon/documentdb/jdbc/DocumentDbDatabaseMetaData.java [434:450]
private static Integer getCharOctetLength(final DocumentDbSchemaColumn column) {
switch (column.getSqlType()) {
case CHAR:
case NCHAR:
case VARCHAR:
case NVARCHAR:
case LONGVARCHAR:
case LONGNVARCHAR:
return TYPE_COLUMN_SIZE_MAP.get(column.getSqlType()) * 4;
case BINARY:
case VARBINARY:
case LONGVARBINARY:
return TYPE_COLUMN_SIZE_MAP.get(column.getSqlType());
default:
return null;
}
}