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Fix core dump in pg_dump --binary-upgrade on zero-column composite type.

This reverts nearly all of commit28f6cabin favor of just using the typrelid we already have in pg_dump's TypeInfostruct for the composite type. As coded, it'd crash if the composite typehad no attributes, since then the query would return no rows.Back-patch to all supported versions. It seems to not really be a problemin 9.0 because that version rejects the syntax "create type t as ()", butwe might as well keep the logic similar in all affected branches.Report and fix by Rushabh Lathia.

1 parent137e7c1 commit9a540c1Copy full SHA for 9a540c1

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src/bin/pg_dump
- pg_dump.c

1 file changed

-9

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`‎src/bin/pg_dump/pg_dump.c`

Lines changed: 3 additions & 9 deletions

Original file line number	Diff line number	Diff line change
`@@ -8853,7 +8853,6 @@ dumpCompositeType(Archive fout, TypeInfo tyinfo)`
`8853`	`8853`	`inti_attalign;`
`8854`	`8854`	`inti_attisdropped;`
`8855`	`8855`	`inti_attcollation;`
`8856`		`-inti_typrelid;`
`8857`	`8856`	`inti;`
`8858`	`8857`	`intactual_atts;`
`8859`	`8858`
`@@ -8874,8 +8873,7 @@ dumpCompositeType(Archive fout, TypeInfo tyinfo)`
`8874`	`8873`	`"pg_catalog.format_type(a.atttypid, a.atttypmod) AS atttypdefn, "`
`8875`	`8874`	`"a.attlen, a.attalign, a.attisdropped, "`
`8876`	`8875`	`"CASE WHEN a.attcollation <> at.typcollation "`
`8877`		`-"THEN a.attcollation ELSE 0 END AS attcollation, "`
`8878`		`-"ct.typrelid "`
	`8876`	`+"THEN a.attcollation ELSE 0 END AS attcollation "`
`8879`	`8877`	`"FROM pg_catalog.pg_type ct "`
`8880`	`8878`	`"JOIN pg_catalog.pg_attribute a ON a.attrelid = ct.typrelid "`
`8881`	`8879`	`"LEFT JOIN pg_catalog.pg_type at ON at.oid = a.atttypid "`
`@@ -8893,8 +8891,7 @@ dumpCompositeType(Archive fout, TypeInfo tyinfo)`
`8893`	`8891`	`appendPQExpBuffer(query,"SELECT a.attname, "`
`8894`	`8892`	`"pg_catalog.format_type(a.atttypid, a.atttypmod) AS atttypdefn, "`
`8895`	`8893`	`"a.attlen, a.attalign, a.attisdropped, "`
`8896`		`-"0 AS attcollation, "`
`8897`		`-"ct.typrelid "`
	`8894`	`+"0 AS attcollation "`
`8898`	`8895`	`"FROM pg_catalog.pg_type ct, pg_catalog.pg_attribute a "`
`8899`	`8896`	`"WHERE ct.oid = '%u'::pg_catalog.oid "`
`8900`	`8897`	`"AND a.attrelid = ct.typrelid "`
`@@ -8912,15 +8909,12 @@ dumpCompositeType(Archive fout, TypeInfo tyinfo)`
`8912`	`8909`	`i_attalign=PQfnumber(res,"attalign");`
`8913`	`8910`	`i_attisdropped=PQfnumber(res,"attisdropped");`
`8914`	`8911`	`i_attcollation=PQfnumber(res,"attcollation");`
`8915`		`-i_typrelid=PQfnumber(res,"typrelid");`
`8916`	`8912`
`8917`	`8913`	`if (binary_upgrade)`
`8918`	`8914`	`{`
`8919`		`-Oidtyprelid=atooid(PQgetvalue(res,0,i_typrelid));`
`8920`		`-`
`8921`	`8915`	`binary_upgrade_set_type_oids_by_type_oid(fout,q,`
`8922`	`8916`	`tyinfo->dobj.catId.oid);`
`8923`		`-binary_upgrade_set_pg_class_oids(fout,q,typrelid, false);`
	`8917`	`+binary_upgrade_set_pg_class_oids(fout,q,tyinfo->typrelid, false);`
`8924`	`8918`	`}`
`8925`	`8919`
`8926`	`8920`	`qtypname=pg_strdup(fmtId(tyinfo->dobj.name));`

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Commit9a540c1

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`‎src/bin/pg_dump/pg_dump.c`

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