Re: Obscure bug

"Andrew Brown" <andrew_brown(at)adc(dot)com> writes:
> Using the attached test program to insert into a table with the following
> definition:
> expr_id int4 not null
> line_no int4 not null
> line_text varchar(254)

> The output is as follows:
> perl t2 x
> 2: ERROR: Unterminated quoted string

I cannot reproduce this failure here, using current sources and
DBD-Pg-0.93. Possibly it's a bug that's been fixed since 7.0.*
but I don't recall having heard of any quoting-related fixes.
Please investigate more closely.

One thing you should at least do is narrow down whether the problem
is in DBD or the backend. If you start perl with environment variable
PGOPTIONS=-d2 to log received queries, what do you get in the postmaster
log? I see

DEBUG: StartTransactionCommand
DEBUG: query: begin
DEBUG: ProcessUtility: begin
DEBUG: CommitTransactionCommand
DEBUG: StartTransactionCommand
DEBUG: query: delete from expression_line where EXPR_ID = 40000
DEBUG: ProcessQuery
DEBUG: CommitTransactionCommand
DEBUG: StartTransactionCommand
DEBUG: query: commit
DEBUG: ProcessUtility: commit
DEBUG: CommitTransactionCommand
DEBUG: StartTransactionCommand
DEBUG: query: begin
DEBUG: ProcessUtility: begin
DEBUG: CommitTransactionCommand
DEBUG: StartTransactionCommand
DEBUG: query: insert into expression_line (EXPR_ID,LINE_NO,LINE_TEXT) values (40000,1,' / \\')
DEBUG: ProcessQuery
DEBUG: CommitTransactionCommand
DEBUG: StartTransactionCommand
DEBUG: query: insert into expression_line (EXPR_ID,LINE_NO,LINE_TEXT) values (40000,2,' abc \\')
DEBUG: ProcessQuery
DEBUG: CommitTransactionCommand
DEBUG: StartTransactionCommand
DEBUG: query: commit
DEBUG: ProcessUtility: commit
DEBUG: CommitTransactionCommand

which looks reasonable enough ...

regards, tom lane