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Don't bother checking the result of SPI_connect[_ext] anymore.
author Tom Lane <tgl@sss.pgh.pa.us>
Mon, 9 Sep 2024 16:18:32 +0000 (12:18 -0400)
committer Tom Lane <tgl@sss.pgh.pa.us>
Mon, 9 Sep 2024 16:18:34 +0000 (12:18 -0400)
SPI_connect/SPI_connect_ext have not returned any value other than
SPI_OK_CONNECT since commit 1833f1a1c in v10; any errors are thrown
via ereport. (The most likely failure is out-of-memory, which has
always been thrown that way, so callers had better be prepared for
such errors.) This makes it somewhat pointless to check these
functions' result, and some callers within our code haven't been
bothering; indeed, the only usage example within spi.sgml doesn't
bother. So it's likely that the omission has propagated into
extensions too.

Hence, let's standardize on not checking, and document the return
value as historical, while not actually changing these functions'
behavior. (The original proposal was to change their return type
to "void", but that would needlessly break extensions that are
conforming to the old practice.) This saves a small amount of
boilerplate code in a lot of places.

Stepan Neretin

Discussion: https://postgr.es/m/CAMaYL5Z9Uk8cD9qGz9QaZ2UBJFOu7jFx5Mwbznz-1tBbPDQZow@mail.gmail.com

16 files changed:
contrib/dblink/dblink.c patch | blob | blame | history
contrib/spi/refint.c patch | blob | blame | history
contrib/tablefunc/tablefunc.c patch | blob | blame | history
contrib/xml2/xpath.c patch | blob | blame | history
doc/src/sgml/spi.sgml patch | blob | blame | history
doc/src/sgml/trigger.sgml patch | blob | blame | history
src/backend/commands/matview.c patch | blob | blame | history
src/backend/utils/adt/ri_triggers.c patch | blob | blame | history
src/backend/utils/adt/ruleutils.c patch | blob | blame | history
src/pl/plperl/plperl.c patch | blob | blame | history
src/pl/plpgsql/src/pl_handler.c patch | blob | blame | history
src/pl/plpython/plpy_main.c patch | blob | blame | history
src/pl/tcl/pltcl.c patch | blob | blame | history
src/test/modules/plsample/plsample.c patch | blob | blame | history
src/test/modules/test_predtest/test_predtest.c patch | blob | blame | history
src/test/regress/regress.c patch | blob | blame | history

diff --git a/contrib/dblink/dblink.c b/contrib/dblink/dblink.c
index 755293456fff687183c969aeb9724db24af13c35..c1c82eb4dd8580d281bdfbcd9f033f5f6e6cba0b 100644 (file)
--- a/contrib/dblink/dblink.c
+++ b/contrib/dblink/dblink.c
@@ -2377,9 +2377,7 @@ get_tuple_of_interest(Relation rel, int *pkattnums, int pknumatts, char **src_pk
/*
* Connect to SPI manager
*/
- if ((ret = SPI_connect()) < 0)
- /* internal error */
- elog(ERROR, "SPI connect failure - returned %d", ret);
+ SPI_connect();
initStringInfo(&buf);
diff --git a/contrib/spi/refint.c b/contrib/spi/refint.c
index 18062eb1cffbd6ac3347f0053bb8db0ccc313d53..e1aef7cd2a3b897d34ec026d8a3bb3d78aaca6e1 100644 (file)
--- a/contrib/spi/refint.c
+++ b/contrib/spi/refint.c
@@ -108,9 +108,7 @@ check_primary_key(PG_FUNCTION_ARGS)
tupdesc = rel->rd_att;
/* Connect to SPI manager */
- if ((ret = SPI_connect()) < 0)
- /* internal error */
- elog(ERROR, "check_primary_key: SPI_connect returned %d", ret);
+ SPI_connect();
/*
* We use SPI plan preparation feature, so allocate space to place key
@@ -328,9 +326,7 @@ check_foreign_key(PG_FUNCTION_ARGS)
tupdesc = rel->rd_att;
/* Connect to SPI manager */
- if ((ret = SPI_connect()) < 0)
- /* internal error */
- elog(ERROR, "check_foreign_key: SPI_connect returned %d", ret);
+ SPI_connect();
/*
* We use SPI plan preparation feature, so allocate space to place key
diff --git a/contrib/tablefunc/tablefunc.c b/contrib/tablefunc/tablefunc.c
index 7d1b5f514390c22a6ccce4a19e21f5aba84fad7f..2a25607a2adbe92806807aeb0780f399e3fc25ed 100644 (file)
--- a/contrib/tablefunc/tablefunc.c
+++ b/contrib/tablefunc/tablefunc.c
@@ -385,9 +385,7 @@ crosstab(PG_FUNCTION_ARGS)
per_query_ctx = rsinfo->econtext->ecxt_per_query_memory;
/* Connect to SPI manager */
- if ((ret = SPI_connect()) < 0)
- /* internal error */
- elog(ERROR, "crosstab: SPI_connect returned %d", ret);
+ SPI_connect();
/* Retrieve the desired rows */
ret = SPI_execute(sql, true, 0);
@@ -724,9 +722,7 @@ load_categories_hash(char *cats_sql, MemoryContext per_query_ctx)
HASH_ELEM | HASH_STRINGS | HASH_CONTEXT);
/* Connect to SPI manager */
- if ((ret = SPI_connect()) < 0)
- /* internal error */
- elog(ERROR, "load_categories_hash: SPI_connect returned %d", ret);
+ SPI_connect();
/* Retrieve the category name rows */
ret = SPI_execute(cats_sql, true, 0);
@@ -806,9 +802,7 @@ get_crosstab_tuplestore(char *sql,
tupstore = tuplestore_begin_heap(randomAccess, false, work_mem);
/* Connect to SPI manager */
- if ((ret = SPI_connect()) < 0)
- /* internal error */
- elog(ERROR, "get_crosstab_tuplestore: SPI_connect returned %d", ret);
+ SPI_connect();
/* Now retrieve the crosstab source rows */
ret = SPI_execute(sql, true, 0);
@@ -1151,15 +1145,11 @@ connectby(char *relname,
AttInMetadata *attinmeta)
{
Tuplestorestate *tupstore = NULL;
- int ret;
MemoryContext oldcontext;
-
int serial = 1;
/* Connect to SPI manager */
- if ((ret = SPI_connect()) < 0)
- /* internal error */
- elog(ERROR, "connectby: SPI_connect returned %d", ret);
+ SPI_connect();
/* switch to longer term context to create the tuple store */
oldcontext = MemoryContextSwitchTo(per_query_ctx);
diff --git a/contrib/xml2/xpath.c b/contrib/xml2/xpath.c
index b999b1f706656bea0cef73e6e069986756065c5b..f94b622d92f4a8d768debd16e62ca9dbf9246aad 100644 (file)
--- a/contrib/xml2/xpath.c
+++ b/contrib/xml2/xpath.c
@@ -560,8 +560,7 @@ xpath_table(PG_FUNCTION_ARGS)
relname,
condition);
- if ((ret = SPI_connect()) < 0)
- elog(ERROR, "xpath_table: SPI_connect returned %d", ret);
+ SPI_connect();
if ((ret = SPI_exec(query_buf.data, 0)) != SPI_OK_SELECT)
elog(ERROR, "xpath_table: SPI execution failed for query %s",
diff --git a/doc/src/sgml/spi.sgml b/doc/src/sgml/spi.sgml
index 7d154914b90762c7b7b61aa4310b6d0abaf736b5..7e2f2df965dba1034af97c21e63287ac54d5213b 100644 (file)
--- a/doc/src/sgml/spi.sgml
+++ b/doc/src/sgml/spi.sgml
@@ -126,16 +126,16 @@ int SPI_connect_ext(int <parameter>options</parameter>)
</para>
</listitem>
</varlistentry>
-
- <varlistentry>
- <term><symbol>SPI_ERROR_CONNECT</symbol></term>
- <listitem>
- <para>
- on error
- </para>
- </listitem>
- </varlistentry>
</variablelist>
+
+ <para>
+ The fact that these functions return <type>int</type>
+ not <type>void</type> is historical. All failure cases are reported
+ via <function>ereport</function> or <function>elog</function>.
+ (In versions before <productname>PostgreSQL</productname> v10,
+ some but not all failures would be reported with a result value
+ of <symbol>SPI_ERROR_CONNECT</symbol>.)
+ </para>
</refsect1>
</refentry>
diff --git a/doc/src/sgml/trigger.sgml b/doc/src/sgml/trigger.sgml
index 31626536a2e290d91b05acfaa9692d29cf2089de..49382d07fa85305b4f810bf48a77d544486f1272 100644 (file)
--- a/doc/src/sgml/trigger.sgml
+++ b/doc/src/sgml/trigger.sgml
@@ -915,8 +915,7 @@ trigf(PG_FUNCTION_ARGS)
tupdesc = trigdata->tg_relation->rd_att;
/* connect to SPI manager */
- if ((ret = SPI_connect()) < 0)
- elog(ERROR, "trigf (fired %s): SPI_connect returned %d", when, ret);
+ SPI_connect();
/* get number of rows in table */
ret = SPI_exec("SELECT count(*) FROM ttest", 0);
diff --git a/src/backend/commands/matview.c b/src/backend/commands/matview.c
index b2457f121a7e0505776648fb47ca276d698cdc90..010097873d1d6a68f64b947c5ee438877f22efc6 100644 (file)
--- a/src/backend/commands/matview.c
+++ b/src/backend/commands/matview.c
@@ -639,8 +639,7 @@ refresh_by_match_merge(Oid matviewOid, Oid tempOid, Oid relowner,
relnatts = RelationGetNumberOfAttributes(matviewRel);
/* Open SPI context. */
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/* Analyze the temp table with the new contents. */
appendStringInfo(&querybuf, "ANALYZE %s", tempname);
diff --git a/src/backend/utils/adt/ri_triggers.c b/src/backend/utils/adt/ri_triggers.c
index 62601a6d80c7be2fe44847f042bb8d2cd943f39b..25931f397f73b1253c62685c908d3a83bdd914bf 100644 (file)
--- a/src/backend/utils/adt/ri_triggers.c
+++ b/src/backend/utils/adt/ri_triggers.c
@@ -340,8 +340,7 @@ RI_FKey_check(TriggerData *trigdata)
break;
}
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/* Fetch or prepare a saved plan for the real check */
ri_BuildQueryKey(&qkey, riinfo, RI_PLAN_CHECK_LOOKUPPK);
@@ -469,8 +468,7 @@ ri_Check_Pk_Match(Relation pk_rel, Relation fk_rel,
/* Only called for non-null rows */
Assert(ri_NullCheck(RelationGetDescr(pk_rel), oldslot, riinfo, true) == RI_KEYS_NONE_NULL);
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/*
* Fetch or prepare a saved plan for checking PK table with values coming
@@ -656,8 +654,7 @@ ri_restrict(TriggerData *trigdata, bool is_no_action)
return PointerGetDatum(NULL);
}
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/*
* Fetch or prepare a saved plan for the restrict lookup (it's the same
@@ -766,8 +763,7 @@ RI_FKey_cascade_del(PG_FUNCTION_ARGS)
pk_rel = trigdata->tg_relation;
oldslot = trigdata->tg_trigslot;
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/* Fetch or prepare a saved plan for the cascaded delete */
ri_BuildQueryKey(&qkey, riinfo, RI_PLAN_CASCADE_ONDELETE);
@@ -875,8 +871,7 @@ RI_FKey_cascade_upd(PG_FUNCTION_ARGS)
newslot = trigdata->tg_newslot;
oldslot = trigdata->tg_trigslot;
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/* Fetch or prepare a saved plan for the cascaded update */
ri_BuildQueryKey(&qkey, riinfo, RI_PLAN_CASCADE_ONUPDATE);
@@ -1051,8 +1046,7 @@ ri_set(TriggerData *trigdata, bool is_set_null, int tgkind)
pk_rel = trigdata->tg_relation;
oldslot = trigdata->tg_trigslot;
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/*
* Fetch or prepare a saved plan for the trigger.
@@ -1547,8 +1541,7 @@ RI_Initial_Check(Trigger *trigger, Relation fk_rel, Relation pk_rel)
PGC_USERSET, PGC_S_SESSION,
GUC_ACTION_SAVE, true, 0, false);
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/*
* Generate the plan. We don't need to cache it, and there are no
@@ -1787,8 +1780,7 @@ RI_PartitionRemove_Check(Trigger *trigger, Relation fk_rel, Relation pk_rel)
PGC_USERSET, PGC_S_SESSION,
GUC_ACTION_SAVE, true, 0, false);
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/*
* Generate the plan. We don't need to cache it, and there are no
diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c
index cd9c3eddd1dd0232e90afd9da9cbe142f9e079cb..54b3542894b3acba70de44f34afacbfd46b23e7b 100644 (file)
--- a/src/backend/utils/adt/ruleutils.c
+++ b/src/backend/utils/adt/ruleutils.c
@@ -589,8 +589,7 @@ pg_get_ruledef_worker(Oid ruleoid, int prettyFlags)
/*
* Connect to SPI manager
*/
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/*
* On the first call prepare the plan to lookup pg_rewrite. We read
@@ -782,8 +781,7 @@ pg_get_viewdef_worker(Oid viewoid, int prettyFlags, int wrapColumn)
/*
* Connect to SPI manager
*/
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/*
* On the first call prepare the plan to lookup pg_rewrite. We read
diff --git a/src/pl/plperl/plperl.c b/src/pl/plperl/plperl.c
index d68ad7be34556c3da75608bce51fc4eed02e6fba..fe719935c676abb3a1773a8ea583a9f8af3627f3 100644 (file)
--- a/src/pl/plperl/plperl.c
+++ b/src/pl/plperl/plperl.c
@@ -1947,8 +1947,7 @@ plperl_inline_handler(PG_FUNCTION_ARGS)
current_call_data = &this_call_data;
- if (SPI_connect_ext(codeblock->atomic ? 0 : SPI_OPT_NONATOMIC) != SPI_OK_CONNECT)
- elog(ERROR, "could not connect to SPI manager");
+ SPI_connect_ext(codeblock->atomic ? 0 : SPI_OPT_NONATOMIC);
select_perl_context(desc.lanpltrusted);
@@ -2412,8 +2411,7 @@ plperl_func_handler(PG_FUNCTION_ARGS)
IsA(fcinfo->context, CallContext) &&
!castNode(CallContext, fcinfo->context)->atomic;
- if (SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0) != SPI_OK_CONNECT)
- elog(ERROR, "could not connect to SPI manager");
+ SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0);
prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, false);
current_call_data->prodesc = prodesc;
@@ -2530,8 +2528,7 @@ plperl_trigger_handler(PG_FUNCTION_ARGS)
int rc PG_USED_FOR_ASSERTS_ONLY;
/* Connect to SPI manager */
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "could not connect to SPI manager");
+ SPI_connect();
/* Make transition tables visible to this SPI connection */
tdata = (TriggerData *) fcinfo->context;
@@ -2638,8 +2635,7 @@ plperl_event_trigger_handler(PG_FUNCTION_ARGS)
ErrorContextCallback pl_error_context;
/* Connect to SPI manager */
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "could not connect to SPI manager");
+ SPI_connect();
/* Find or compile the function */
prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, true);
diff --git a/src/pl/plpgsql/src/pl_handler.c b/src/pl/plpgsql/src/pl_handler.c
index 980f0961bc8cafdbe5d91f144b5295f6224a0152..adfbbc8a7b7ec7006fefa0246d85eda0f6315df2 100644 (file)
--- a/src/pl/plpgsql/src/pl_handler.c
+++ b/src/pl/plpgsql/src/pl_handler.c
@@ -235,8 +235,7 @@ plpgsql_call_handler(PG_FUNCTION_ARGS)
/*
* Connect to SPI manager
*/
- if ((rc = SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0)) != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed: %s", SPI_result_code_string(rc));
+ SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0);
/* Find or compile the function */
func = plpgsql_compile(fcinfo, false);
@@ -326,8 +325,7 @@ plpgsql_inline_handler(PG_FUNCTION_ARGS)
/*
* Connect to SPI manager
*/
- if ((rc = SPI_connect_ext(codeblock->atomic ? 0 : SPI_OPT_NONATOMIC)) != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed: %s", SPI_result_code_string(rc));
+ SPI_connect_ext(codeblock->atomic ? 0 : SPI_OPT_NONATOMIC);
/* Compile the anonymous code block */
func = plpgsql_compile_inline(codeblock->source_text);
@@ -510,8 +508,7 @@ plpgsql_validator(PG_FUNCTION_ARGS)
/*
* Connect to SPI manager (is this needed for compilation?)
*/
- if ((rc = SPI_connect()) != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed: %s", SPI_result_code_string(rc));
+ SPI_connect();
/*
* Set up a fake fcinfo with just enough info to satisfy
diff --git a/src/pl/plpython/plpy_main.c b/src/pl/plpython/plpy_main.c
index 010a97378c9085940cead61c8de7dacaa45da709..8117e20efa23b43d042df4f689235dd664f28a3b 100644 (file)
--- a/src/pl/plpython/plpy_main.c
+++ b/src/pl/plpython/plpy_main.c
@@ -202,8 +202,7 @@ plpython3_call_handler(PG_FUNCTION_ARGS)
!castNode(CallContext, fcinfo->context)->atomic;
/* Note: SPI_finish() happens in plpy_exec.c, which is dubious design */
- if (SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0) != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0);
/*
* Push execution context onto stack. It is important that this get
@@ -272,8 +271,7 @@ plpython3_inline_handler(PG_FUNCTION_ARGS)
PLy_initialize();
/* Note: SPI_finish() happens in plpy_exec.c, which is dubious design */
- if (SPI_connect_ext(codeblock->atomic ? 0 : SPI_OPT_NONATOMIC) != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect_ext(codeblock->atomic ? 0 : SPI_OPT_NONATOMIC);
MemSet(fcinfo, 0, SizeForFunctionCallInfo(0));
MemSet(&flinfo, 0, sizeof(flinfo));
diff --git a/src/pl/tcl/pltcl.c b/src/pl/tcl/pltcl.c
index 21b2b045933ea7a55b61868df0aa8e08bf1343fd..e2ccaa84f3fed37675308ef1478a7e850067c0b0 100644 (file)
--- a/src/pl/tcl/pltcl.c
+++ b/src/pl/tcl/pltcl.c
@@ -808,8 +808,7 @@ pltcl_func_handler(PG_FUNCTION_ARGS, pltcl_call_state *call_state,
!castNode(CallContext, fcinfo->context)->atomic;
/* Connect to SPI manager */
- if (SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0) != SPI_OK_CONNECT)
- elog(ERROR, "could not connect to SPI manager");
+ SPI_connect_ext(nonatomic ? SPI_OPT_NONATOMIC : 0);
/* Find or compile the function */
prodesc = compile_pltcl_function(fcinfo->flinfo->fn_oid, InvalidOid,
@@ -1072,8 +1071,7 @@ pltcl_trigger_handler(PG_FUNCTION_ARGS, pltcl_call_state *call_state,
call_state->trigdata = trigdata;
/* Connect to SPI manager */
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "could not connect to SPI manager");
+ SPI_connect();
/* Make transition tables visible to this SPI connection */
rc = SPI_register_trigger_data(trigdata);
@@ -1321,8 +1319,7 @@ pltcl_event_trigger_handler(PG_FUNCTION_ARGS, pltcl_call_state *call_state,
int tcl_rc;
/* Connect to SPI manager */
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "could not connect to SPI manager");
+ SPI_connect();
/* Find or compile the function */
prodesc = compile_pltcl_function(fcinfo->flinfo->fn_oid,
diff --git a/src/test/modules/plsample/plsample.c b/src/test/modules/plsample/plsample.c
index 40c462e84e03ab20bed73f41fe5ea2491809e4f9..89ea166a67675498a1dae989e5a4ac3c8a556210 100644 (file)
--- a/src/test/modules/plsample/plsample.c
+++ b/src/test/modules/plsample/plsample.c
@@ -220,8 +220,7 @@ plsample_trigger_handler(PG_FUNCTION_ARGS)
elog(ERROR, "not called by trigger manager");
/* Connect to the SPI manager */
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "could not connect to SPI manager");
+ SPI_connect();
rc = SPI_register_trigger_data(trigdata);
Assert(rc >= 0);
diff --git a/src/test/modules/test_predtest/test_predtest.c b/src/test/modules/test_predtest/test_predtest.c
index 27ac136ca5d46c675b9a15a7e7082fbc5b7ef29f..678b13ca30b60c205e268abaf499b3f4069fac59 100644 (file)
--- a/src/test/modules/test_predtest/test_predtest.c
+++ b/src/test/modules/test_predtest/test_predtest.c
@@ -54,8 +54,7 @@ test_predtest(PG_FUNCTION_ARGS)
int i;
/* We use SPI to parse, plan, and execute the test query */
- if (SPI_connect() != SPI_OK_CONNECT)
- elog(ERROR, "SPI_connect failed");
+ SPI_connect();
/*
* First, plan and execute the query, and inspect the results. To the
diff --git a/src/test/regress/regress.c b/src/test/regress/regress.c
index 14aad5a0c6e9f697059dbd0028eb890007c819bc..9e81371be4bf8961b042fd00fb60926a53318ea2 100644 (file)
--- a/src/test/regress/regress.c
+++ b/src/test/regress/regress.c
@@ -379,8 +379,7 @@ ttdummy(PG_FUNCTION_ARGS)
newoff = Int32GetDatum((int32) DatumGetInt64(newoff));
/* Connect to SPI manager */
- if ((ret = SPI_connect()) < 0)
- elog(ERROR, "ttdummy (%s): SPI_connect returned %d", relname, ret);
+ SPI_connect();
/* Fetch tuple values and nulls */
cvals = (Datum *) palloc(natts * sizeof(Datum));
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