dbeaver: [postgres] in 6.1.4 sometimes drop statements fail on "syntax error"

System information:

• Operating system (distribution) and version: mac os
• DBeaver version: 6.1.4

Connection specification:

• Database name and version : postgres 11.2
• Driver name : default
• Do you use tunnels or proxies (SSH, SOCKS, etc)? not relevant

Describe the problem you’re observing:

It appears that sometimes drop statement fail on syntax error because for some reason DBeaver wraps the drop in a select - see image below:

This never occurred in previous versions (pre-6.1.4).

Steps to reproduce, if exist:

Include any warning/errors/backtraces from the logs

org.jkiss.dbeaver.model.sql.DBSQLException: SQL Error [42601]: ERROR: syntax error at or near "database_privs"
  Position: 31
	at org.jkiss.dbeaver.model.impl.jdbc.exec.JDBCStatementImpl.executeStatement(JDBCStatementImpl.java:134)
	at org.jkiss.dbeaver.ui.editors.sql.execute.SQLQueryJob.executeStatement(SQLQueryJob.java:467)
	at org.jkiss.dbeaver.ui.editors.sql.execute.SQLQueryJob.lambda$0(SQLQueryJob.java:407)
	at org.jkiss.dbeaver.model.exec.DBExecUtils.tryExecuteRecover(DBExecUtils.java:146)
	at org.jkiss.dbeaver.ui.editors.sql.execute.SQLQueryJob.executeSingleQuery(SQLQueryJob.java:405)
	at org.jkiss.dbeaver.ui.editors.sql.execute.SQLQueryJob.extractData(SQLQueryJob.java:849)
	at org.jkiss.dbeaver.ui.editors.sql.SQLEditor$QueryResultsContainer.readData(SQLEditor.java:2776)
	at org.jkiss.dbeaver.ui.controls.resultset.ResultSetJobDataRead.lambda$0(ResultSetJobDataRead.java:98)
	at org.jkiss.dbeaver.model.exec.DBExecUtils.tryExecuteRecover(DBExecUtils.java:146)
	at org.jkiss.dbeaver.ui.controls.resultset.ResultSetJobDataRead.run(ResultSetJobDataRead.java:96)
	at org.jkiss.dbeaver.ui.controls.resultset.ResultSetViewer$17.run(ResultSetViewer.java:3271)
	at org.jkiss.dbeaver.model.runtime.AbstractJob.run(AbstractJob.java:102)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: org.postgresql.util.PSQLException: ERROR: syntax error at or near "database_privs"
  Position: 31
	at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2440)
	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2183)
	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:308)
	at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:441)
	at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:365)
	at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:307)
	at org.postgresql.jdbc.PgStatement.executeCachedSql(PgStatement.java:293)
	at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:270)
	at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:266)
	at org.jkiss.dbeaver.model.impl.jdbc.exec.JDBCStatementImpl.execute(JDBCStatementImpl.java:338)
	at org.jkiss.dbeaver.model.impl.jdbc.exec.JDBCStatementImpl.executeStatement(JDBCStatementImpl.java:131)
	... 12 more