jhnmora000 commented on a change in pull request #156: GORA 411 - Add
exists(key) to DataStore interface
URL: https://github.com/apache/gora/pull/156#discussion_r280295627
##########
File path:
gora-ignite/src/main/java/org/apache/gora/ignite/store/IgniteStore.java
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@@ -176,6 +176,27 @@ public boolean schemaExists() throws GoraException {
}
}
+ @Override
+ public boolean exists(K key) throws GoraException {
+ Object[] keyl = null;
+ if (igniteMapping.getPrimaryKey().size() == 1) {
+ keyl = new Object[]{key};
+ } else {
+ //Composite key pending
+ }
+ String selectQuery =
IgniteSQLBuilder.createSelectQueryExists(igniteMapping);
+ try (PreparedStatement stmt = connection.prepareStatement(selectQuery)) {
+ IgniteSQLBuilder.fillSelectQuery(stmt, igniteMapping, keyl);
+ ResultSet rs = stmt.executeQuery();
+ rs.next();
+ int resp = rs.getInt(1);
Review comment:
I tried to use a similar approach to one used in the Cassandra backend
(based on this [post](https://stackoverflow.com/a/34475402)), but what you
suggest seems more intuitive, I will try it.
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