@Override
	void deleteEntry(DBRecord record) throws IOException {
		Field indexedField = record.getField(indexColumn);
		if (isSparseIndex && indexedField.isNull()) {
			return;
		}
		IndexField f = indexKeyType.newIndexField(indexedField, record.getKeyField());
		indexTable.deleteRecord(f);
	}
Generate index table schema for specified primaryTable and index column
@param primaryTable primary table
@param colIndex index column
@return index table schema
Ghidra/Framework/DB/src/main/java/db/FieldIndexTable.java