Date: Thu, 28 Nov 2019 11:46:53 -0300
From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Pg Hackers <pgsql-hackers@lists.postgresql.org>
Subject: remove useless returns
Message-ID: <20191128144653.GA27883@alvherre.pgsql>
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Here's a silly insomnia-inspired little patch that removes useless
"return;" lines from some routines.  (I left some alone, because they
seemed to be there more for documentation purposes, such as the ones in
from_char_set_mode and from_char_set_int; also regcomp.c since the
pedigree there is unclear.)

This seems pretty uncontroversial, so I'm not thinking of waiting over
the US holidays to get opinions about it ...

-- 
Álvaro Herrera                PostgreSQL Expert, https://www.2ndQuadrant.com/

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 filename="0001-Remove-useless-return-lines.patch"

From 630a65869f8824ed6a77810f26143924a7d95fc1 Mon Sep 17 00:00:00 2001
From: Alvaro Herrera <alvherre@alvh.no-ip.org>
Date: Wed, 27 Nov 2019 10:28:37 -0300
Subject: [PATCH] Remove useless "return;" lines

---
 src/backend/access/gist/gist.c             | 2 --
 src/backend/access/rmgrdesc/genericdesc.c  | 2 --
 src/backend/access/transam/twophase.c      | 2 --
 src/backend/access/transam/xact.c          | 1 -
 src/backend/executor/nodeTableFuncscan.c   | 2 --
 src/backend/jit/llvm/llvmjit.c             | 2 --
 src/backend/libpq/hba.c                    | 1 -
 src/backend/replication/logical/launcher.c | 2 --
 src/backend/replication/walsender.c        | 3 ---
 src/backend/rewrite/rowsecurity.c          | 2 --
 src/backend/utils/adt/datetime.c           | 2 --
 src/bin/pg_ctl/pg_ctl.c                    | 2 --
 src/bin/pg_dump/compress_io.c              | 4 ----
 src/bin/pg_dump/pg_backup_archiver.c       | 5 -----
 src/bin/pg_dump/pg_backup_custom.c         | 7 -------
 src/bin/pg_dump/pg_backup_directory.c      | 7 -------
 src/bin/pg_dump/pg_backup_null.c           | 3 ---
 src/bin/pg_dump/pg_backup_tar.c            | 3 ---
 src/bin/pg_dump/pg_dump.c                  | 2 --
 src/bin/pg_upgrade/parallel.c              | 4 ----
 src/bin/pg_upgrade/relfilenode.c           | 4 ----
 src/bin/pg_upgrade/tablespace.c            | 2 --
 src/bin/psql/common.c                      | 2 --
 src/fe_utils/print.c                       | 2 --
 src/interfaces/ecpg/compatlib/informix.c   | 2 --
 src/interfaces/ecpg/pgtypeslib/datetime.c  | 1 -
 src/interfaces/ecpg/pgtypeslib/dt_common.c | 2 --
 src/interfaces/ecpg/pgtypeslib/timestamp.c | 1 -
 src/interfaces/libpq/fe-auth-scram.c       | 1 -
 src/pl/plperl/plperl.c                     | 4 ----
 src/pl/plpgsql/src/pl_exec.c               | 2 --
 src/port/win32error.c                      | 1 -
 32 files changed, 82 deletions(-)

diff --git a/src/backend/access/gist/gist.c b/src/backend/access/gist/gist.c
index 8d9c8d025d..3800f58ce7 100644
--- a/src/backend/access/gist/gist.c
+++ b/src/backend/access/gist/gist.c
@@ -1088,8 +1088,6 @@ gistFindCorrectParent(Relation r, GISTInsertStack *child)
 		LockBuffer(child->parent->buffer, GIST_EXCLUSIVE);
 		gistFindCorrectParent(r, child);
 	}
-
-	return;
 }
 
 /*
diff --git a/src/backend/access/rmgrdesc/genericdesc.c b/src/backend/access/rmgrdesc/genericdesc.c
index 0fe02dc85a..3bad0578eb 100644
--- a/src/backend/access/rmgrdesc/genericdesc.c
+++ b/src/backend/access/rmgrdesc/genericdesc.c
@@ -43,8 +43,6 @@ generic_desc(StringInfo buf, XLogReaderState *record)
 		else
 			appendStringInfo(buf, "offset %u, length %u", offset, length);
 	}
-
-	return;
 }
 
 /*
diff --git a/src/backend/access/transam/twophase.c b/src/backend/access/transam/twophase.c
index b3ad0d08e3..529976885f 100644
--- a/src/backend/access/transam/twophase.c
+++ b/src/backend/access/transam/twophase.c
@@ -2436,6 +2436,4 @@ PrepareRedoRemove(TransactionId xid, bool giveWarning)
 	if (gxact->ondisk)
 		RemoveTwoPhaseFile(xid, giveWarning);
 	RemoveGXact(gxact);
-
-	return;
 }
diff --git a/src/backend/access/transam/xact.c b/src/backend/access/transam/xact.c
index 5c0d0f2af0..5353b6ab0b 100644
--- a/src/backend/access/transam/xact.c
+++ b/src/backend/access/transam/xact.c
@@ -3428,7 +3428,6 @@ CheckTransactionBlock(bool isTopLevel, bool throwError, const char *stmtType)
 	/* translator: %s represents an SQL statement name */
 			 errmsg("%s can only be used in transaction blocks",
 					stmtType)));
-	return;
 }
 
 /*
diff --git a/src/backend/executor/nodeTableFuncscan.c b/src/backend/executor/nodeTableFuncscan.c
index 21cf3ca0c9..ffcf4613f4 100644
--- a/src/backend/executor/nodeTableFuncscan.c
+++ b/src/backend/executor/nodeTableFuncscan.c
@@ -335,8 +335,6 @@ tfuncFetchRows(TableFuncScanState *tstate, ExprContext *econtext)
 
 	MemoryContextSwitchTo(oldcxt);
 	MemoryContextReset(tstate->perTableCxt);
-
-	return;
 }
 
 /*
diff --git a/src/backend/jit/llvm/llvmjit.c b/src/backend/jit/llvm/llvmjit.c
index 1c851e00fc..3b52d8cc21 100644
--- a/src/backend/jit/llvm/llvmjit.c
+++ b/src/backend/jit/llvm/llvmjit.c
@@ -834,8 +834,6 @@ llvm_create_types(void)
 	 * Leave the module alive, otherwise references to function would be
 	 * dangling.
 	 */
-
-	return;
 }
 
 /*
diff --git a/src/backend/libpq/hba.c b/src/backend/libpq/hba.c
index cc4b661433..9989904769 100644
--- a/src/backend/libpq/hba.c
+++ b/src/backend/libpq/hba.c
@@ -2903,7 +2903,6 @@ check_ident_usermap(IdentLine *identLine, const char *usermap_name,
 				*found_p = true;
 		}
 	}
-	return;
 }
 
 
diff --git a/src/backend/replication/logical/launcher.c b/src/backend/replication/logical/launcher.c
index 1f8821cc43..4643af95fe 100644
--- a/src/backend/replication/logical/launcher.c
+++ b/src/backend/replication/logical/launcher.c
@@ -223,8 +223,6 @@ WaitForReplicationWorkerAttach(LogicalRepWorker *worker,
 			CHECK_FOR_INTERRUPTS();
 		}
 	}
-
-	return;
 }
 
 /*
diff --git a/src/backend/replication/walsender.c b/src/backend/replication/walsender.c
index ac9209747a..8bafa65e50 100644
--- a/src/backend/replication/walsender.c
+++ b/src/backend/replication/walsender.c
@@ -2301,7 +2301,6 @@ WalSndLoop(WalSndSendDataCallback send_data)
 									 WAIT_EVENT_WAL_SENDER_MAIN);
 		}
 	}
-	return;
 }
 
 /* Initialize a per-walsender data structure for this walsender process */
@@ -2757,8 +2756,6 @@ retry:
 				 (uint32) (sentPtr >> 32), (uint32) sentPtr);
 		set_ps_display(activitymsg, false);
 	}
-
-	return;
 }
 
 /*
diff --git a/src/backend/rewrite/rowsecurity.c b/src/backend/rewrite/rowsecurity.c
index df7bde380d..1969d53a11 100644
--- a/src/backend/rewrite/rowsecurity.c
+++ b/src/backend/rewrite/rowsecurity.c
@@ -394,8 +394,6 @@ get_row_security_policies(Query *root, RangeTblEntry *rte, int rt_index,
 	 * when necessary (eg: role changes)
 	 */
 	*hasRowSecurity = true;
-
-	return;
 }
 
 /*
diff --git a/src/backend/utils/adt/datetime.c b/src/backend/utils/adt/datetime.c
index c911d7223c..b6ac90c051 100644
--- a/src/backend/utils/adt/datetime.c
+++ b/src/backend/utils/adt/datetime.c
@@ -313,8 +313,6 @@ j2date(int jd, int *year, int *month, int *day)
 	quad = julian * 2141 / 65536;
 	*day = julian - 7834 * quad / 256;
 	*month = (quad + 10) % MONTHS_PER_YEAR + 1;
-
-	return;
 }								/* j2date() */
 
 
diff --git a/src/bin/pg_ctl/pg_ctl.c b/src/bin/pg_ctl/pg_ctl.c
index 95e5fafe1f..65f9fb4c0a 100644
--- a/src/bin/pg_ctl/pg_ctl.c
+++ b/src/bin/pg_ctl/pg_ctl.c
@@ -422,8 +422,6 @@ free_readfile(char **optlines)
 		free(curr_line);
 
 	free(optlines);
-
-	return;
 }
 
 /*
diff --git a/src/bin/pg_dump/compress_io.c b/src/bin/pg_dump/compress_io.c
index 03c3e73ad0..b2ca565494 100644
--- a/src/bin/pg_dump/compress_io.c
+++ b/src/bin/pg_dump/compress_io.c
@@ -192,7 +192,6 @@ WriteDataToArchive(ArchiveHandle *AH, CompressorState *cs,
 			WriteDataToArchiveNone(AH, cs, data, dLen);
 			break;
 	}
-	return;
 }
 
 /*
@@ -308,8 +307,6 @@ WriteDataToArchiveZlib(ArchiveHandle *AH, CompressorState *cs,
 	cs->zp->next_in = (void *) unconstify(char *, data);
 	cs->zp->avail_in = dLen;
 	DeflateCompressorZlib(AH, cs, false);
-
-	return;
 }
 
 static void
@@ -407,7 +404,6 @@ WriteDataToArchiveNone(ArchiveHandle *AH, CompressorState *cs,
 					   const char *data, size_t dLen)
 {
 	cs->writeF(AH, data, dLen);
-	return;
 }
 
 
diff --git a/src/bin/pg_dump/pg_backup_archiver.c b/src/bin/pg_dump/pg_backup_archiver.c
index d051f267ba..77bf9edaba 100644
--- a/src/bin/pg_dump/pg_backup_archiver.c
+++ b/src/bin/pg_dump/pg_backup_archiver.c
@@ -1045,8 +1045,6 @@ WriteData(Archive *AHX, const void *data, size_t dLen)
 		fatal("internal error -- WriteData cannot be called outside the context of a DataDumper routine");
 
 	AH->WriteDataPtr(AH, data, dLen);
-
-	return;
 }
 
 /*
@@ -1461,7 +1459,6 @@ void
 archputs(const char *s, Archive *AH)
 {
 	WriteData(AH, s, strlen(s));
-	return;
 }
 
 /* Public */
@@ -1736,8 +1733,6 @@ ahwrite(const void *ptr, size_t size, size_t nmemb, ArchiveHandle *AH)
 
 	if (bytes_written != size * nmemb)
 		WRITE_ERROR_EXIT;
-
-	return;
 }
 
 /* on some error, we may decide to go on... */
diff --git a/src/bin/pg_dump/pg_backup_custom.c b/src/bin/pg_dump/pg_backup_custom.c
index fc742f5b56..369dcea429 100644
--- a/src/bin/pg_dump/pg_backup_custom.c
+++ b/src/bin/pg_dump/pg_backup_custom.c
@@ -317,8 +317,6 @@ _WriteData(ArchiveHandle *AH, const void *data, size_t dLen)
 	if (dLen > 0)
 		/* WriteDataToArchive() internally throws write errors */
 		WriteDataToArchive(AH, cs, data, dLen);
-
-	return;
 }
 
 /*
@@ -644,8 +642,6 @@ _WriteBuf(ArchiveHandle *AH, const void *buf, size_t len)
 	if (fwrite(buf, 1, len, AH->FH) != len)
 		WRITE_ERROR_EXIT;
 	ctx->filePos += len;
-
-	return;
 }
 
 /*
@@ -663,8 +659,6 @@ _ReadBuf(ArchiveHandle *AH, void *buf, size_t len)
 	if (fread(buf, 1, len, AH->FH) != len)
 		READ_ERROR_EXIT(AH->FH);
 	ctx->filePos += len;
-
-	return;
 }
 
 /*
@@ -945,7 +939,6 @@ _CustomWriteFunc(ArchiveHandle *AH, const char *buf, size_t len)
 		WriteInt(AH, len);
 		_WriteBuf(AH, buf, len);
 	}
-	return;
 }
 
 /*
diff --git a/src/bin/pg_dump/pg_backup_directory.c b/src/bin/pg_dump/pg_backup_directory.c
index aa00bcaaff..8631abb43a 100644
--- a/src/bin/pg_dump/pg_backup_directory.c
+++ b/src/bin/pg_dump/pg_backup_directory.c
@@ -349,9 +349,6 @@ _WriteData(ArchiveHandle *AH, const void *data, size_t dLen)
 	if (dLen > 0 && cfwrite(data, dLen, ctx->dataFH) != dLen)
 		fatal("could not write to output file: %s",
 			  get_cfp_error(ctx->dataFH));
-
-
-	return;
 }
 
 /*
@@ -517,8 +514,6 @@ _WriteBuf(ArchiveHandle *AH, const void *buf, size_t len)
 	if (cfwrite(buf, len, ctx->dataFH) != len)
 		fatal("could not write to output file: %s",
 			  get_cfp_error(ctx->dataFH));
-
-	return;
 }
 
 /*
@@ -537,8 +532,6 @@ _ReadBuf(ArchiveHandle *AH, void *buf, size_t len)
 	 */
 	if (cfread(buf, len, ctx->dataFH) != len)
 		fatal("could not read from input file: end of file");
-
-	return;
 }
 
 /*
diff --git a/src/bin/pg_dump/pg_backup_null.c b/src/bin/pg_dump/pg_backup_null.c
index c62f9436aa..0458979f3c 100644
--- a/src/bin/pg_dump/pg_backup_null.c
+++ b/src/bin/pg_dump/pg_backup_null.c
@@ -86,7 +86,6 @@ _WriteData(ArchiveHandle *AH, const void *data, size_t dLen)
 {
 	/* Just send it to output, ahwrite() already errors on failure */
 	ahwrite(data, 1, dLen, AH);
-	return;
 }
 
 /*
@@ -109,7 +108,6 @@ _WriteBlobData(ArchiveHandle *AH, const void *data, size_t dLen)
 
 		destroyPQExpBuffer(buf);
 	}
-	return;
 }
 
 static void
@@ -221,7 +219,6 @@ static void
 _WriteBuf(ArchiveHandle *AH, const void *buf, size_t len)
 {
 	/* Don't do anything */
-	return;
 }
 
 static void
diff --git a/src/bin/pg_dump/pg_backup_tar.c b/src/bin/pg_dump/pg_backup_tar.c
index fd74835165..775118f297 100644
--- a/src/bin/pg_dump/pg_backup_tar.c
+++ b/src/bin/pg_dump/pg_backup_tar.c
@@ -615,8 +615,6 @@ _WriteData(ArchiveHandle *AH, const void *data, size_t dLen)
 
 	if (tarWrite(data, dLen, tctx->TH) != dLen)
 		WRITE_ERROR_EXIT;
-
-	return;
 }
 
 static void
@@ -818,7 +816,6 @@ _ReadBuf(ArchiveHandle *AH, void *buf, size_t len)
 		fatal("could not read from input file: end of file");
 
 	ctx->filePos += len;
-	return;
 }
 
 static void
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index bf69adc2f4..08658c8e86 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -15416,8 +15416,6 @@ dumpTable(Archive *fout, TableInfo *tbinfo)
 	}
 
 	free(namecopy);
-
-	return;
 }
 
 /*
diff --git a/src/bin/pg_upgrade/parallel.c b/src/bin/pg_upgrade/parallel.c
index 39c508e73b..22fc7e5e0f 100644
--- a/src/bin/pg_upgrade/parallel.c
+++ b/src/bin/pg_upgrade/parallel.c
@@ -148,8 +148,6 @@ parallel_exec_prog(const char *log_file, const char *opt_log_file,
 		thread_handles[parallel_jobs - 1] = child;
 #endif
 	}
-
-	return;
 }
 
 
@@ -263,8 +261,6 @@ parallel_transfer_all_new_dbs(DbInfoArr *old_db_arr, DbInfoArr *new_db_arr,
 		thread_handles[parallel_jobs - 1] = child;
 #endif
 	}
-
-	return;
 }
 
 
diff --git a/src/bin/pg_upgrade/relfilenode.c b/src/bin/pg_upgrade/relfilenode.c
index f9d0812cc5..9e6013bff1 100644
--- a/src/bin/pg_upgrade/relfilenode.c
+++ b/src/bin/pg_upgrade/relfilenode.c
@@ -73,8 +73,6 @@ transfer_all_new_tablespaces(DbInfoArr *old_db_arr, DbInfoArr *new_db_arr,
 
 	end_progress_output();
 	check_ok();
-
-	return;
 }
 
 
@@ -128,8 +126,6 @@ transfer_all_new_dbs(DbInfoArr *old_db_arr, DbInfoArr *new_db_arr,
 		/* We allocate something even for n_maps == 0 */
 		pg_free(mappings);
 	}
-
-	return;
 }
 
 /*
diff --git a/src/bin/pg_upgrade/tablespace.c b/src/bin/pg_upgrade/tablespace.c
index dfe5bfdcfd..7f42d1e3c9 100644
--- a/src/bin/pg_upgrade/tablespace.c
+++ b/src/bin/pg_upgrade/tablespace.c
@@ -100,8 +100,6 @@ get_tablespace_paths(void)
 	PQclear(res);
 
 	PQfinish(conn);
-
-	return;
 }
 
 
diff --git a/src/bin/psql/common.c b/src/bin/psql/common.c
index 90f6380170..53a1ea2bdb 100644
--- a/src/bin/psql/common.c
+++ b/src/bin/psql/common.c
@@ -2399,8 +2399,6 @@ expand_tilde(char **filename)
 		}
 	}
 #endif
-
-	return;
 }
 
 /*
diff --git a/src/fe_utils/print.c b/src/fe_utils/print.c
index 1f8bde8443..b9cd6a1752 100644
--- a/src/fe_utils/print.c
+++ b/src/fe_utils/print.c
@@ -3619,8 +3619,6 @@ refresh_utf8format(const printTableOpt *opt)
 	popt->wrap_left = unicode_style.wrap_left;
 	popt->wrap_right = unicode_style.wrap_right;
 	popt->wrap_right_border = unicode_style.wrap_right_border;
-
-	return;
 }
 
 /*
diff --git a/src/interfaces/ecpg/compatlib/informix.c b/src/interfaces/ecpg/compatlib/informix.c
index d921b974aa..a7bbeb9223 100644
--- a/src/interfaces/ecpg/compatlib/informix.c
+++ b/src/interfaces/ecpg/compatlib/informix.c
@@ -529,7 +529,6 @@ void
 rtoday(date * d)
 {
 	PGTYPESdate_today(d);
-	return;
 }
 
 int
@@ -959,7 +958,6 @@ rupshift(char *str)
 	for (; *str != '\0'; str++)
 		if (islower((unsigned char) *str))
 			*str = toupper((unsigned char) *str);
-	return;
 }
 
 int
diff --git a/src/interfaces/ecpg/pgtypeslib/datetime.c b/src/interfaces/ecpg/pgtypeslib/datetime.c
index 71dc1a5ff8..1b253747fc 100644
--- a/src/interfaces/ecpg/pgtypeslib/datetime.c
+++ b/src/interfaces/ecpg/pgtypeslib/datetime.c
@@ -152,7 +152,6 @@ PGTYPESdate_today(date * d)
 	GetCurrentDateTime(&ts);
 	if (errno == 0)
 		*d = date2j(ts.tm_year, ts.tm_mon, ts.tm_mday) - date2j(2000, 1, 1);
-	return;
 }
 
 #define PGTYPES_DATE_NUM_MAX_DIGITS		20	/* should suffice for most
diff --git a/src/interfaces/ecpg/pgtypeslib/dt_common.c b/src/interfaces/ecpg/pgtypeslib/dt_common.c
index c22f657674..c1a3a3e2cb 100644
--- a/src/interfaces/ecpg/pgtypeslib/dt_common.c
+++ b/src/interfaces/ecpg/pgtypeslib/dt_common.c
@@ -624,8 +624,6 @@ j2date(int jd, int *year, int *month, int *day)
 	quad = julian * 2141 / 65536;
 	*day = julian - 7834 * quad / 256;
 	*month = (quad + 10) % 12 + 1;
-
-	return;
 }								/* j2date() */
 
 /* DecodeSpecial()
diff --git a/src/interfaces/ecpg/pgtypeslib/timestamp.c b/src/interfaces/ecpg/pgtypeslib/timestamp.c
index 7816e6fdc0..810dd06ee6 100644
--- a/src/interfaces/ecpg/pgtypeslib/timestamp.c
+++ b/src/interfaces/ecpg/pgtypeslib/timestamp.c
@@ -297,7 +297,6 @@ PGTYPEStimestamp_current(timestamp * ts)
 	GetCurrentDateTime(&tm);
 	if (errno == 0)
 		tm2timestamp(&tm, 0, NULL, ts);
-	return;
 }
 
 static int
diff --git a/src/interfaces/libpq/fe-auth-scram.c b/src/interfaces/libpq/fe-auth-scram.c
index 741f566a72..3bfcafa1e0 100644
--- a/src/interfaces/libpq/fe-auth-scram.c
+++ b/src/interfaces/libpq/fe-auth-scram.c
@@ -279,7 +279,6 @@ pg_fe_scram_exchange(void *opaq, char *input, int inputlen,
 error:
 	*done = true;
 	*success = false;
-	return;
 }
 
 /*
diff --git a/src/pl/plperl/plperl.c b/src/pl/plperl/plperl.c
index 0b224b933c..c78891868a 100644
--- a/src/pl/plperl/plperl.c
+++ b/src/pl/plperl/plperl.c
@@ -2147,8 +2147,6 @@ plperl_create_sub(plperl_proc_desc *prodesc, const char *s, Oid fn_oid)
 						prodesc->proname)));
 
 	prodesc->reference = subref;
-
-	return;
 }
 
 
@@ -2388,8 +2386,6 @@ plperl_call_perl_event_trigger_func(plperl_proc_desc *desc,
 	PUTBACK;
 	FREETMPS;
 	LEAVE;
-
-	return;
 }
 
 static Datum
diff --git a/src/pl/plpgsql/src/pl_exec.c b/src/pl/plpgsql/src/pl_exec.c
index 4a9ed83030..4f0de7a811 100644
--- a/src/pl/plpgsql/src/pl_exec.c
+++ b/src/pl/plpgsql/src/pl_exec.c
@@ -1189,8 +1189,6 @@ plpgsql_exec_event_trigger(PLpgSQL_function *func, EventTriggerData *trigdata)
 	 * Pop the error context stack
 	 */
 	error_context_stack = plerrcontext.previous;
-
-	return;
 }
 
 /*
diff --git a/src/port/win32error.c b/src/port/win32error.c
index f0582c8dad..04a3247cef 100644
--- a/src/port/win32error.c
+++ b/src/port/win32error.c
@@ -205,5 +205,4 @@ _dosmaperr(unsigned long e)
 #endif
 
 	errno = EINVAL;
-	return;
 }
-- 
2.20.1


--d6Gm4EdcadzBjdND--