Github user blrunner commented on a diff in the pull request:
https://github.com/apache/tajo/pull/772#discussion_r39951872
--- Diff:
tajo-catalog/tajo-catalog-server/src/main/java/org/apache/tajo/catalog/store/AbstractDBStore.java
---
@@ -2228,6 +2244,257 @@ private void setPartitionKeys(int pid,
PartitionDescProto.Builder partitionDesc)
return partitions;
}
+ /**
+ * Check if list of partitions exist on catalog.
+ *
+ *
+ * @param databaseId
+ * @param tableId
+ * @return
+ */
+ public boolean existPartitionsOnCatalog(int tableId) {
+ Connection conn = null;
+ ResultSet res = null;
+ PreparedStatement pstmt = null;
+ boolean result = false;
+
+ try {
+ String sql = "SELECT COUNT(*) CNT FROM "
+ + TB_PARTTIONS +" WHERE " + COL_TABLES_PK + " = ? ";
+
+ if (LOG.isDebugEnabled()) {
+ LOG.debug(sql);
+ }
+
+ conn = getConnection();
+ pstmt = conn.prepareStatement(sql);
+ pstmt.setInt(1, tableId);
+ res = pstmt.executeQuery();
+
+ if (res.next()) {
+ if (res.getInt("CNT") > 0) {
+ result = true;
+ }
+ }
+ } catch (SQLException se) {
+ throw new TajoInternalError(se);
+ } finally {
+ CatalogUtil.closeQuietly(pstmt, res);
+ }
+ return result;
+ }
+
+ @Override
+ public List<PartitionDescProto>
getPartitionsByFilter(PartitionsByFilterProto request) {
+ throw new TajoRuntimeException(new UnsupportedException());
--- End diff --
If we want to provide ```getPartitionsByFilter()``` by calling
```getPartitionsByAlgebra()```, we need to convert filter conditions to algebra
expressions. I need more time to implement this feature and I wish to implement
it at another issue.
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