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Allow non-quoted identifiers as isolation test session/step names.

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For no obvious reason, isolationtester has always insisted that
session and step names be written with double quotes.  This is
fairly tedious and does little for test readability, especially
since the names that people actually choose almost always look
like normal identifiers.  Hence, let's tweak the lexer to allow
SQL-like identifiers not only double-quoted strings.

(They're SQL-like, not exactly SQL, because I didn't add any
case-folding logic.  Also there's no provision for U&"..." names,
not that anyone's likely to care.)

There is one incompatibility introduced by this change: if you write
"foo""bar" with no space, that used to be taken as two identifiers,
but now it's just one identifier with an embedded quote mark.

I converted all the src/test/isolation/ specfiles to remove
unnecessary double quotes, but stopped there because my
eyes were glazing over already.

Like 741d7f104, back-patch to all supported branches, so that this
isn't a stumbling block for back-patching isolation test changes.

Discussion: https://postgr.es/m/759113.1623861959@sss.pgh.pa.us
This commit is contained in:
Tom Lane
2021-06-23 18:41:39 -04:00
parent 9aa06956ea
commit 5179a1ab77
98 changed files with 3650 additions and 3624 deletions
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2
contrib/test_decoding/specs/oldest_xmin.spec
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@ -39,4 +39,4 @@ step "s1_commit" { COMMIT; }
# composite type is a rare form of DDL which allows T1 to see the tuple which
# will be removed (xmax set) before T1 commits. That is, interlocking doesn't
# forbid modifying catalog after someone read it (and didn't commit yet).
permutation "s0_begin" "s0_getxid" "s1_begin" "s1_insert" "s0_alter" "s0_commit" "s0_checkpoint" "s0_get_changes" "s0_get_changes""s1_commit" "s0_vacuum" "s0_get_changes"
permutation "s0_begin" "s0_getxid" "s1_begin" "s1_insert" "s0_alter" "s0_commit" "s0_checkpoint" "s0_get_changes" "s0_get_changes" "s1_commit" "s0_vacuum" "s0_get_changes"