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Commit970ef45

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Re-enable pg_upgrade, after adding checks that the source
and target databases are of versions it knows about.
1 parentd7f2c55 commit970ef45

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1 file changed

+60
-19
lines changed

1 file changed

+60
-19
lines changed

‎src/bin/pg_dump/pg_upgrade‎

Lines changed: 60 additions & 19 deletions
Original file line numberDiff line numberDiff line change
@@ -1,11 +1,10 @@
11
#!/bin/sh
22
#
3-
# pg_upgrade: update a database without needing a full dump/reload cycle
3+
# pg_upgrade: update a database without needing a full dump/reload cycle.
44
# CAUTION: read the manual page before trying to use this!
55

6-
echo"pg_upgrade is disabled in this release because the on-disk structure"1>&2
7-
echo"of the tables has changed compared to previous releases."1>&2
8-
exit 1
6+
# NOTE: we must be sure to update the version-checking code a few dozen lines
7+
# below for each new PostgreSQL release.
98

109
trap"rm -f /tmp/$$" 0 1 2 3 15
1110

@@ -33,37 +32,76 @@ OLDDIR="$1"
3332

3433
# check things
3534

36-
if [!-f"./data/PG_VERSION" ]
35+
if [!-d"./data" ]
3736
thenecho"`basename$0` must be run from the directory containing
38-
the database directory\`data' (`dirname$PGDATA`.)"1>&2
37+
the database directory\`data\' (`dirname$PGDATA`.)"1>&2
38+
echo"You must have run initdb to create the template1 database."1>&2
3939
exit 1
4040
fi
4141

4242
if [!-d"./$OLDDIR" ]
43-
thenecho"You must rename your old /data directory to /$OLDDIR and run initdb."1>&2
43+
thenecho"You must rename your old data directory to$OLDDIR and run initdb."1>&2
44+
exit 1
45+
fi
46+
47+
if [!-d"./data/base/template1" ]
48+
thenecho"Cannot find database template1 in ./data/base."1>&2
49+
echo"Are you running$0 as the postgres superuser?"1>&2
4450
exit 1
4551
fi
4652

4753
if [!-d"./$OLDDIR/base/template1" ]
48-
thenecho"There isnot database template1 in ./$OLDDIR/base."1>&2
54+
thenecho"There isno database template1 in ./$OLDDIR/base."1>&2
4955
exit 1
5056
fi
5157

52-
if [!-d"./data" ]
53-
thenecho"You must run initdb to create the template1 database."1>&2
58+
if [!-r"./data/PG_VERSION" ]
59+
thenecho"Cannot read ./data/PG_VERSION --- something is wrong."1>&2
5460
exit 1
5561
fi
5662

57-
if [!-d"./data/base/template1" ]
58-
thenecho"$0 must be run as the postgres superuser."1>&2
63+
if [!-r"./$OLDDIR/PG_VERSION" ]
64+
thenecho"Cannot read ./$OLDDIR/PG_VERSION --- something is wrong."1>&2
5965
exit 1
6066
fi
6167

62-
# do I need to create a database?
68+
# Get the actual versions seen in the data dirs.
69+
DESTVERSION=`cat ./data/PG_VERSION`
70+
SRCVERSION=`cat ./$OLDDIR/PG_VERSION`
6371

64-
# remove any COPY statements
65-
# we don't even need pgdump_oid because we are moving pg_variable
66-
# then shouldn't be in there anyway
72+
# Check for version compatibility.
73+
# This code will need to be updated/reviewed for each new PostgreSQL release.
74+
75+
# MYVERSION is the expected output database version
76+
MYVERSION="6.6"
77+
78+
if ["$DESTVERSION"!="$MYVERSION" ]
79+
thenecho"$0 is for PostgreSQL version$MYVERSION, but ./data/PG_VERSION contains$DESTVERSION."1>&2
80+
echo"Did you run initdb for version$MYVERSION?"1>&2
81+
exit 1
82+
fi
83+
84+
# Check that input database is of a compatible version (anything with the same
85+
# physical layout of user tables and indexes should be OK). I did not write
86+
# something like "$SRCVERSION -ge $MINVERSION" because test(1) isn't bright
87+
# enough to compare dotted version strings properly. Using a case statement
88+
# looks uglier but is more flexible.
89+
90+
case"$SRCVERSION"in
91+
6.5) ;;
92+
6.6) ;;
93+
*)echo"Sorry,`basename$0` cannot upgrade database version$SRCVERSION to$DESTVERSION."1>&2
94+
echo"The on-disk structure of tables has changed."1>&2
95+
echo"You will need to dump and restore using pg_dump."1>&2
96+
exit 1;;
97+
esac
98+
99+
100+
# OK, ready to proceed.
101+
# XXX Do I need to create a database?
102+
103+
# remove any COPY statements, except for the one that loads pg_shadow.
104+
# there shouldn't be any others in there anyway...
67105

68106
cat$INPUT| awk'{
69107
if (toupper($1) == "COPY" && $2 != "pg_shadow")
@@ -82,6 +120,8 @@ $0 aborted." 1>&2
82120
exit 1
83121
fi
84122

123+
echo"Input script$INPUT complete, moving data files..."
124+
85125
forDIRin data/base/*
86126
do
87127
BASEDIR="`basename$DIR`"
@@ -92,13 +132,14 @@ do
92132
BASEFILE="`basename$FILE`"
93133
if [`expr"$BASEFILE":"pg_"`-ne 3-a \
94134
"$BASEFILE"!="PG_VERSION" ]
95-
thenmv$FILE$DIR
135+
thenmv-f$FILE$DIR
96136
fi
97137
done
98138
fi
99139
done
100140

101-
mv$OLDDIR/pg_log data
102-
mv$OLDDIR/pg_variable data
141+
mv-f$OLDDIR/pg_log data
142+
mv-f$OLDDIR/pg_variable data
103143

104144
echo"You may remove the$OLDDIR directory with 'rm -r$OLDDIR'."
145+
exit 0

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