Github user fpompermaier commented on a diff in the pull request: https://github.com/apache/flink/pull/1885#discussion_r59712089 --- Diff: flink-batch-connectors/flink-jdbc/src/main/java/org/apache/flink/api/java/io/jdbc/JDBCInputFormat.java --- @@ -363,14 +439,31 @@ public JDBCInputFormat finish() { if (format.dbURL == null) { throw new IllegalArgumentException("No database URL supplied"); } - if (format.query == null) { + if (format.queryTemplate == null) { throw new IllegalArgumentException("No query supplied"); } if (format.drivername == null) { throw new IllegalArgumentException("No driver supplied"); } + adjustQueryTemplateIfNecessary(); return format; } + + /** Try to add $CONDITIONS token automatically (at least for straightforward cases) */ + private void adjustQueryTemplateIfNecessary() { --- End diff -- Indeed I only try to fix the query if it is a simple select (I add the WHERE clause). Otherwise it fails (I agree that is very dangerous to try to guess where to put the $CONDITIONS token).
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