deniskuzZ commented on a change in pull request #2266:
URL: https://github.com/apache/hive/pull/2266#discussion_r642235334
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java
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@@ -5394,6 +5410,476 @@ public void countOpenTxns() throws MetaException {
}
}
+ private void cleanOldStatsFromPartColStatTable(Map<PartitionInfo,
ColumnStatistics> statsPartInfoMap,
+ Connection dbConn) throws
SQLException {
+ PreparedStatement preparedStatement = null;
+ int numRows = 0;
+ int maxNumRows = MetastoreConf.getIntVar(conf,
ConfVars.DIRECT_SQL_MAX_ELEMENTS_VALUES_CLAUSE);
+
+ // Index is present on DB_NAME,TABLE_NAME,COLUMN_NAME,PARTITION_NAME. use
that.
+ // TODO : Need to add catalog name to the index
+ String delete = "DELETE FROM \"PART_COL_STATS\" where \"DB_NAME\" = ? AND "
+ + "\"TABLE_NAME\" = ? AND \"COLUMN_NAME\" = ? AND
\"PARTITION_NAME\" = ? "
+ + "AND \"PART_ID\" = ?";
+
+ try {
+ preparedStatement = sqlGenerator.prepareStmtWithParameters(dbConn,
delete, null);
+ for (Map.Entry entry : statsPartInfoMap.entrySet()) {
+ ColumnStatistics colStats = (ColumnStatistics) entry.getValue();
+ PartitionInfo partitionInfo = (PartitionInfo) entry.getKey();
+ for (ColumnStatisticsObj statisticsObj : colStats.getStatsObj()) {
+ preparedStatement.setString(1, colStats.getStatsDesc().getDbName());
+ preparedStatement.setString(2,
colStats.getStatsDesc().getTableName());
+ preparedStatement.setString(3, statisticsObj.getColName());
+ preparedStatement.setString(4,
colStats.getStatsDesc().getPartName());
+ preparedStatement.setLong(5, partitionInfo.partitionId);
+ numRows++;
+ preparedStatement.addBatch();
+ if (numRows == maxNumRows) {
+ preparedStatement.executeBatch();
+ numRows = 0;
+ LOG.debug("Executed delete " + delete + " for numRows " + numRows);
+ }
+ }
+ }
+
+ if (numRows != 0) {
+ preparedStatement.executeBatch();
+ LOG.debug("Executed delete " + delete + " for numRows " + numRows);
+ }
+ } finally {
+ closeStmt(preparedStatement);
+ }
+ }
+
+ private void insertIntoPartColStatTable(Map<PartitionInfo, ColumnStatistics>
partitionInfoMap,
+ long maxCsId,
+ Connection dbConn) throws
SQLException, MetaException, NoSuchObjectException {
+ PreparedStatement preparedStatement = null;
+ int numRows = 0;
+ int maxNumRows = MetastoreConf.getIntVar(conf,
ConfVars.DIRECT_SQL_MAX_ELEMENTS_VALUES_CLAUSE);
Review comment:
same as above, check if maxBatchSize is applicable
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