Rename SetSingleFuncCall() to InitMaterializedSRF()

Per discussion, the existing routine name able to initialize a SRF
function with materialize mode is unpopular, so rename it.  Equally, the
flags of this function are renamed, as of:
- SRF_SINGLE_USE_EXPECTED -> MAT_SRF_USE_EXPECTED_DESC
- SRF_SINGLE_BLESS -> MAT_SRF_BLESS
The previous function and flags introduced in 9e98583 are kept around
for compatibility purposes, so as any extension code already compiled
with v15 continues to work as-is.  The declarations introduced here for
compatibility will be removed from HEAD in a follow-up commit.

The new names have been suggested by Andres Freund and Melanie
Plageman.

Discussion: https://postgr.es/m/20221013194820.ciktb2sbbpw7cljm@awork3.anarazel.de
Backpatch-through: 15

1 files changed, 4 insertions, 5 deletions

diff --git a/src/backend/utils/adt/jsonfuncs.c b/src/backend/utils/adt/jsonfuncs.c
index ccc32795758..6c5886eb056 100644
--- a/src/backend/utils/adt/jsonfuncs.c
+++ b/src/backend/utils/adt/jsonfuncs.c
@@ -1923,7 +1923,7 @@ each_worker_jsonb(FunctionCallInfo fcinfo, const char *funcname, bool as_text)
 						funcname)));
 
 	rsi = (ReturnSetInfo *) fcinfo->resultinfo;
-	SetSingleFuncCall(fcinfo, SRF_SINGLE_BLESS);
+	InitMaterializedSRF(fcinfo, MAT_SRF_BLESS);
 
 	tmp_cxt = AllocSetContextCreate(CurrentMemoryContext,
 									"jsonb_each temporary cxt",
@@ -2003,7 +2003,7 @@ each_worker(FunctionCallInfo fcinfo, bool as_text)
 
 	rsi = (ReturnSetInfo *) fcinfo->resultinfo;
 
-	SetSingleFuncCall(fcinfo, SRF_SINGLE_BLESS);
+	InitMaterializedSRF(fcinfo, MAT_SRF_BLESS);
 	state->tuple_store = rsi->setResult;
 	state->ret_tdesc = rsi->setDesc;
 
@@ -2166,8 +2166,7 @@ elements_worker_jsonb(FunctionCallInfo fcinfo, const char *funcname,
 
 	rsi = (ReturnSetInfo *) fcinfo->resultinfo;
 
-	SetSingleFuncCall(fcinfo,
-					  SRF_SINGLE_USE_EXPECTED | SRF_SINGLE_BLESS);
+	InitMaterializedSRF(fcinfo, MAT_SRF_USE_EXPECTED_DESC | MAT_SRF_BLESS);
 
 	tmp_cxt = AllocSetContextCreate(CurrentMemoryContext,
 									"jsonb_array_elements temporary cxt",
@@ -2245,7 +2244,7 @@ elements_worker(FunctionCallInfo fcinfo, const char *funcname, bool as_text)
 	state = palloc0(sizeof(ElementsState));
 	sem = palloc0(sizeof(JsonSemAction));
 
-	SetSingleFuncCall(fcinfo, SRF_SINGLE_USE_EXPECTED | SRF_SINGLE_BLESS);
+	InitMaterializedSRF(fcinfo, MAT_SRF_USE_EXPECTED_DESC | MAT_SRF_BLESS);
 	rsi = (ReturnSetInfo *) fcinfo->resultinfo;
 	state->tuple_store = rsi->setResult;
 	state->ret_tdesc = rsi->setDesc;