AmatyaAvadhanula commented on code in PR #12404:
URL: https://github.com/apache/druid/pull/12404#discussion_r887042644
##########
server/src/main/java/org/apache/druid/metadata/SQLMetadataConnector.java:
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@@ -327,6 +331,29 @@ tableName, getPayloadType()
)
);
}
+
+ public boolean tableContainsColumn(Handle handle, String table, String
column)
+ {
+ try {
+ DatabaseMetaData databaseMetaData = handle.getConnection().getMetaData();
+ ResultSet columns = databaseMetaData.getColumns(
+ null,
+ null,
+ table,
+ column
+ );
+ return columns.next();
+ }
+ catch (SQLException e) {
+ return false;
+ }
+ }
+
+ public void prepareTaskEntryTable(final String tableName)
+ {
+ createEntryTable(tableName);
Review Comment:
The new flow to avoid additional db calls would be the following, right?
```
If table exists and column does not exist:
Update schema
Else:
Create table with new schema
```
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