Liquibase failing while attempting to drop non-existent TMP_% tables during generateChangeLog - liquibase

Question

Running
liquibase generateChangeLog > genChgLog.txt
with the following as my liquibase.properties,
classpath=C:\Program Files (x86)\MySQL\MySQL Connector
J\mysql-connector-java-8.0.16.jar
driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://{thisisnottheproblem,Iguarantee}
username={it'sright}
password={it'sright}
referenceUrl=jdbc:mysql://{thisisnottheproblem,Iguarantee}
referenceUsername={it'sright}
referencePassword={it'sright}
changeLogFile=databaseChangeLogSchema.mysql.sql
diffTypes=tables,columns,views,primaryKeys,indexes,foreignKeys,sequences,data
logLevel=debug
I am consistently getting the likes of this, output to the genChgLog.txt file:
Starting Liquibase at Wed, 15 May 2019 15:37:32 CDT (version 3.6.3
built at 2019-01-29 11:34:48) Unexpected error running Liquibase:
liquibase.exception.DatabaseException:
liquibase.exception.DatabaseException: Unknown table
'TMP_CTAWHBNCQVQMHSUU' [Failed SQL: DROP TABLE TMP_CTAWHBNCQVQMHSUU]
liquibase.exception.LiquibaseException:
liquibase.command.CommandExecutionException:
liquibase.exception.DatabaseException:
liquibase.exception.DatabaseException: Unknown table
'TMP_CTAWHBNCQVQMHSUU' [Failed SQL: DROP TABLE TMP_CTAWHBNCQVQMHSUU]
at
liquibase.integration.commandline.CommandLineUtils.doGenerateChangeLog(CommandLineUtils.java:279)
at liquibase.integration.commandline.Main.doMigration(Main.java:1058)
at liquibase.integration.commandline.Main.run(Main.java:199) at
liquibase.integration.commandline.Main.main(Main.java:137) Caused by:
liquibase.command.CommandExecutionException:
liquibase.exception.DatabaseException:
liquibase.exception.DatabaseException: Unknown table
'TMP_CTAWHBNCQVQMHSUU' [Failed SQL: DROP TABLE TMP_CTAWHBNCQVQMHSUU]
at liquibase.command.AbstractCommand.execute(AbstractCommand.java:24)
at
liquibase.integration.commandline.CommandLineUtils.doGenerateChangeLog(CommandLineUtils.java:277)
... 3 common frames omitted Caused by:
liquibase.exception.DatabaseException:
liquibase.exception.DatabaseException: Unknown table
'TMP_CTAWHBNCQVQMHSUU' [Failed SQL: DROP TABLE TMP_CTAWHBNCQVQMHSUU]
at
liquibase.snapshot.jvm.ForeignKeySnapshotGenerator.snapshotObject(ForeignKeySnapshotGenerator.java:223)
at
liquibase.snapshot.jvm.JdbcSnapshotGenerator.snapshot(JdbcSnapshotGenerator.java:66)
. . . at
liquibase.command.core.GenerateChangeLogCommand.run(GenerateChangeLogCommand.java:46)
at liquibase.command.AbstractCommand.execute(AbstractCommand.java:19)
... 4 common frames omitted Caused by:
liquibase.exception.DatabaseException: Unknown table
'TMP_CTAWHBNCQVQMHSUU' [Failed SQL: DROP TABLE TMP_CTAWHBNCQVQMHSUU]
at
liquibase.executor.jvm.JdbcExecutor$ExecuteStatementCallback.doInStatement(JdbcExecutor.java:356)
at liquibase.executor.jvm.JdbcExecutor.execute(JdbcExecutor.java:57)
at liquibase.executor.jvm.JdbcExecutor.execute(JdbcExecutor.java:125)
at liquibase.executor.jvm.JdbcExecutor.execute(JdbcExecutor.java:109)
at
liquibase.database.core.MySQLDatabase.hasBugJdbcConstraintsDeferrable(MySQLDatabase.java:294)
at
liquibase.snapshot.jvm.ForeignKeySnapshotGenerator.snapshotObject(ForeignKeySnapshotGenerator.java:188)
... 25 common frames omitted Caused by:
java.sql.SQLSyntaxErrorException: Unknown table 'TMP_CTAWHBNCQVQMHSUU'
at
com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:120)
at
com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at
com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
at
com.mysql.cj.jdbc.StatementImpl.executeInternal(StatementImpl.java:782)
at com.mysql.cj.jdbc.StatementImpl.execute(StatementImpl.java:666)
at
liquibase.executor.jvm.JdbcExecutor$ExecuteStatementCallback.doInStatement(JdbcExecutor.java:352)
... 30 common frames omitted
For more information, please use the --logLevel flag
Each time I run it, it changes the name of the phantom TMP_ tables (although they always begin with TMP_ and then a string of apparently random characters). I don't know where it's getting these non-existent TMP_ tables from that it wants to drop, but...is there some way to make it only attempt to drop them if they exist? Of potential note: it works fine if my only diffType is "tables", "data", or if I have both "tables" and "data" as diffTypes...otherwise, failure...

Answer 1

I don't have all the details, but it appears this can happen when using a database user with insufficient permissions. I talked with someone who said that using a root level database user fixed this issue for them.