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If you write the literal 'abc''def' in an EXEC SQL command, that will come out the other end as 'abc'def', triggering a syntax error in the backend. Likewise, "abc""def" is reduced to "abc"def" which is wrong syntax for a quoted identifier. The cause is that the lexer thinks it should emit just one quote mark, whereas what it really should do is keep the string as-is. Add some docs and test cases, too. Although this seems clearly a bug, I fear users wouldn't appreciate changing it in minor releases. Some may well be working around it by applying an extra doubling of affected quotes, as for example sql/dyntest.pgc has been doing. Per investigation of a report from 1250kv, although this isn't exactly what he/she was on about. Discussion: https://postgr.es/m/673825.1603223178@sss.pgh.pa.us |
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