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  1. Debezium
  2. DBZ-5521

LogMiner DML parser incorrectly interprets concatenation operator inside quoted column value

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      Bug report

      Since PR,
      LogminerDmlParser convert double vertical bar to single vertical bar

      The simple expression of the test code is as follows.
      [Sample Test Code] 

      'I||am' >  'I|am'

       

      @Test
public void testDoubleBlocker() throws Exception {
    final Table table = Table.editor()
            .tableId(new TableId(null, "UNKNOWN", "TABLE"))
            .addColumn(Column.editor().name("COL1").create())
            .create();

    String sql = "update \"UNKNOWN\".\"TABLE\" set \"COL1\" = 'I||am' where \"COL1\" = 'I||am'";
    System.out.println("====== UPDATE =======");
    System.out.println(sql);

    LogMinerDmlEntry entry = fastDmlParser.parse(sql, table);
    assertThat(entry.getEventType()).isEqualTo(EventType.UPDATE);
    assertThat(entry.getNewValues()).hasSize(1);
    assertThat(entry.getNewValues()[0]).isEqualTo("I|am");
    assertThat(entry.getOldValues()).hasSize(1);
    assertThat(entry.getOldValues()[0]).isEqualTo("I||am");

    System.out.println("====== OLD VALUES =======");
    for (Object oldValue : entry.getOldValues()) {
        System.out.println(oldValue.toString());
    }

    System.out.println("====== NEW VALUES =======");
    for (Object newValue : entry.getNewValues()) {
        System.out.println(newValue.toString());
    }

    sql = "insert into \"UNKNOWN\".\"TABLE\" (\"COL1\") values ('I||am')";
    System.out.println("====== INSERT =======");
    System.out.println(sql);

    entry = fastDmlParser.parse(sql, table);
    System.out.println("====== NEW VALUES =======");
    for (Object newValue : entry.getNewValues()) {
        System.out.println(newValue.toString());
    }

    assertThat(entry.getEventType()).isEqualTo(EventType.INSERT);
    assertThat(entry.getNewValues()).hasSize(1);
    assertThat(entry.getNewValues()[0]).isEqualTo("I||am");
}

       

       

      [Result] 

      [INFO] Running io.debezium.connector.oracle.logminer.LogMinerDmlParserTest
====== UPDATE =======
update "UNKNOWN"."TABLE" set "COL1" = 'I||am' where "COL1" = 'I||am'
====== OLD VALUES =======
I||am
====== NEW VALUES =======
I|am
====== INSERT =======
insert into "UNKNOWN"."TABLE" ("COL1") values ('I||am')
====== NEW VALUES =======
I||am
[INFO] Tests run: 14, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.001 s - in io.debezium.connector.oracle.logminer.LogMinerDmlParserTest

      PR is about escaped single quote.
      1) But is it intended to be "double vertical bar to single vertical bar"?

      else if (nested == 0 & c == '|' && lookAhead == '|') {
    // Concatenation
    for (int i = index + 2; i < sql.length(); ++i) {
        if (sql.charAt(i) != ' ') {
            // found next non-whitespace character
            index = i - 1;
            break;
        }
    }
}

       

      2) And, should we consider concatenation statements in the redo log?
      [Query]

      include concatenation where clause.

      UPDATE SMARTUX.PT_HDTV_BBS SET BBS_ID  = 'pu001' WHERE REG_NO =  '1' || '22';

      [Redo Log]

      concatenation not shown

      update "SMARTUX"."PT_HDTV_BBS" set "BBS_ID" = 'pu001' where "REG_NO" = 122

      **

       

      What Debezium connector do you use and what version?

      1.9.4

              ccranfor@redhat.com Chris Cranford
              seungpil@mz.co.kr Seungpil Park (Inactive)
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                Created:
                Updated:
                Resolved: