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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.

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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
`@@ -8978,7 +8978,6 @@ dumpCompositeType(Archive fout, TypeInfo tyinfo)`
`8978`	`8978`	`inti_attalign;`
`8979`	`8979`	`inti_attisdropped;`
`8980`	`8980`	`inti_attcollation;`
`8981`		`-inti_typrelid;`
`8982`	`8981`	`inti;`
`8983`	`8982`	`intactual_atts;`
`8984`	`8983`
`@@ -8999,8 +8998,7 @@ dumpCompositeType(Archive fout, TypeInfo tyinfo)`
`8999`	`8998`	`"pg_catalog.format_type(a.atttypid, a.atttypmod) AS atttypdefn, "`
`9000`	`8999`	`"a.attlen, a.attalign, a.attisdropped, "`
`9001`	`9000`	`"CASE WHEN a.attcollation <> at.typcollation "`
`9002`		`-"THEN a.attcollation ELSE 0 END AS attcollation, "`
`9003`		`-"ct.typrelid "`
	`9001`	`+"THEN a.attcollation ELSE 0 END AS attcollation "`
`9004`	`9002`	`"FROM pg_catalog.pg_type ct "`
`9005`	`9003`	`"JOIN pg_catalog.pg_attribute a ON a.attrelid = ct.typrelid "`
`9006`	`9004`	`"LEFT JOIN pg_catalog.pg_type at ON at.oid = a.atttypid "`
`@@ -9018,8 +9016,7 @@ dumpCompositeType(Archive fout, TypeInfo tyinfo)`
`9018`	`9016`	`appendPQExpBuffer(query,"SELECT a.attname, "`
`9019`	`9017`	`"pg_catalog.format_type(a.atttypid, a.atttypmod) AS atttypdefn, "`
`9020`	`9018`	`"a.attlen, a.attalign, a.attisdropped, "`
`9021`		`-"0 AS attcollation, "`
`9022`		`-"ct.typrelid "`
	`9019`	`+"0 AS attcollation "`
`9023`	`9020`	`"FROM pg_catalog.pg_type ct, pg_catalog.pg_attribute a "`
`9024`	`9021`	`"WHERE ct.oid = '%u'::pg_catalog.oid "`
`9025`	`9022`	`"AND a.attrelid = ct.typrelid "`
`@@ -9037,15 +9034,12 @@ dumpCompositeType(Archive fout, TypeInfo tyinfo)`
`9037`	`9034`	`i_attalign=PQfnumber(res,"attalign");`
`9038`	`9035`	`i_attisdropped=PQfnumber(res,"attisdropped");`
`9039`	`9036`	`i_attcollation=PQfnumber(res,"attcollation");`
`9040`		`-i_typrelid=PQfnumber(res,"typrelid");`
`9041`	`9037`
`9042`	`9038`	`if (binary_upgrade)`
`9043`	`9039`	`{`
`9044`		`-Oidtyprelid=atooid(PQgetvalue(res,0,i_typrelid));`
`9045`		`-`
`9046`	`9040`	`binary_upgrade_set_type_oids_by_type_oid(fout,q,`
`9047`	`9041`	`tyinfo->dobj.catId.oid);`
`9048`		`-binary_upgrade_set_pg_class_oids(fout,q,typrelid, false);`
	`9042`	`+binary_upgrade_set_pg_class_oids(fout,q,tyinfo->typrelid, false);`
`9049`	`9043`	`}`
`9050`	`9044`
`9051`	`9045`	`qtypname=pg_strdup(fmtId(tyinfo->dobj.name));`

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Commit3205b30

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`‎src/bin/pg_dump/pg_dump.c`

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