COPY ... FROM fails if run after a single-line comment

[cowwoc]

Which version and edition of Flyway are you using?

5.1.4

Which client are you using? (Command-line, Java API, Maven plugin, Gradle plugin)

Java API

Which database are you using (type & version)?

Postgresql 10.5

Which operating system are you using?

Microsoft Windows [Version 10.0.17134.285]

What did you do?

Ran SQL migration file containing:

-- COPY ... FROM is much faster than INSERT: https://stackoverflow.com/q/46715354/14731
COPY currency (id, code) FROM stdin;
1	SPHR
2	SCS
3	AGLC
\.
SELECT pg_catalog.setval('currency_id_sequence', 3, true);```

What did you expect to see?

Statement ran successfully

What did you see instead?

org.flywaydb.core.internal.sqlscript.FlywaySqlScriptException: 
Migration V100__Added_currencies.sql failed
-------------------------------------------
SQL State  : 57014
Error Code : 0
Message    : ERROR: COPY from stdin failed: The JDBC driver currently does not support COPY operations.
  Where: COPY currency, line 1
Location   : com/mycompany/myproject/database/V100__Added_currencies.sql (C:\Users\Gili\Documents\myproject\my-module\target\test-classes\com\mycompany\myproject\database\V100__Added_currencies.sql)
Line       : 1
Statement  : -- COPY ... FROM is much faster than INSERT: https://stackoverflow.com/q/46715354/14731
COPY currency (id, code) FROM stdin

	at org.flywaydb.core.internal.database.ExecutableSqlScript.handleException(ExecutableSqlScript.java:331)
	at org.flywaydb.core.internal.database.ExecutableSqlScript.executeStatement(ExecutableSqlScript.java:301)
	at org.flywaydb.core.internal.database.ExecutableSqlScript.execute(ExecutableSqlScript.java:243)
	at org.flywaydb.core.internal.resolver.sql.SqlMigrationExecutor.execute(SqlMigrationExecutor.java:91)
	at org.flywaydb.core.internal.command.DbMigrate.doMigrateGroup(DbMigrate.java:352)
	... 42 more
Caused by: org.postgresql.util.PSQLException: ERROR: COPY from stdin failed: The JDBC driver currently does not support COPY operations.
  Where: COPY currency, line 1
	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 com.p6spy.engine.wrapper.StatementWrapper.execute(StatementWrapper.java:114)
	at com.zaxxer.hikari.pool.ProxyStatement.execute(ProxyStatement.java:95)
	at com.zaxxer.hikari.pool.HikariProxyStatement.execute(HikariProxyStatement.java)
	at org.flywaydb.core.internal.util.jdbc.JdbcTemplate.executeStatement(JdbcTemplate.java:244)
	at org.flywaydb.core.internal.database.StandardSqlStatement.execute(StandardSqlStatement.java:44)
	at org.flywaydb.core.internal.database.ExecutableSqlScript.executeStatement(ExecutableSqlScript.java:280)
	... 45 more

[cowwoc]

It turns out that if I add an empty line between the comment on line 1 and the COPY command on line 2 the statement runs just fine.

This seems like a simple parsing bug to me because (to my understanding) Flyway does not require an empty line after comments.

[axelfontaine]

Good catch! That was it indeed. Fixed.