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Because of gcc -Wmissing-prototypes, all functions in dynamically loadable modules must have a separate prototype declaration. This is meant to detect global functions that are not declared in header files, but in cases where the function is called via dfmgr, this is redundant. Besides filling up space with boilerplate, this is a frequent source of compiler warnings in extension modules. We can fix that by creating the function prototype as part of the PG_FUNCTION_INFO_V1 macro, which such modules have to use anyway. That makes the code of modules cleaner, because there is one less place where the entry points have to be listed, and creates an additional check that functions have the right prototype. Remove now redundant prototypes from contrib and other modules.
183 lines
4.0 KiB
C
183 lines
4.0 KiB
C
/*
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* contrib/intarray/_int_gin.c
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*/
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#include "postgres.h"
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#include "access/gin.h"
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#include "access/gist.h"
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#include "access/skey.h"
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#include "_int.h"
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PG_FUNCTION_INFO_V1(ginint4_queryextract);
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Datum
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ginint4_queryextract(PG_FUNCTION_ARGS)
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{
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int32 *nentries = (int32 *) PG_GETARG_POINTER(1);
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StrategyNumber strategy = PG_GETARG_UINT16(2);
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int32 *searchMode = (int32 *) PG_GETARG_POINTER(6);
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Datum *res = NULL;
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*nentries = 0;
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if (strategy == BooleanSearchStrategy)
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{
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QUERYTYPE *query = PG_GETARG_QUERYTYPE_P(0);
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ITEM *items = GETQUERY(query);
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int i;
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/* empty query must fail */
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if (query->size <= 0)
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PG_RETURN_POINTER(NULL);
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/*
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* If the query doesn't have any required primitive values (for
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* instance, it's something like '! 42'), we have to do a full index
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* scan.
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*/
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if (query_has_required_values(query))
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*searchMode = GIN_SEARCH_MODE_DEFAULT;
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else
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*searchMode = GIN_SEARCH_MODE_ALL;
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/*
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* Extract all the VAL items as things we want GIN to check for.
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*/
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res = (Datum *) palloc(sizeof(Datum) * query->size);
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*nentries = 0;
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for (i = 0; i < query->size; i++)
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{
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if (items[i].type == VAL)
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{
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res[*nentries] = Int32GetDatum(items[i].val);
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(*nentries)++;
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}
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}
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}
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else
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{
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ArrayType *query = PG_GETARG_ARRAYTYPE_P(0);
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CHECKARRVALID(query);
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*nentries = ARRNELEMS(query);
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if (*nentries > 0)
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{
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int32 *arr;
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int32 i;
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res = (Datum *) palloc(sizeof(Datum) * (*nentries));
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arr = ARRPTR(query);
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for (i = 0; i < *nentries; i++)
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res[i] = Int32GetDatum(arr[i]);
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}
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switch (strategy)
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{
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case RTOverlapStrategyNumber:
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*searchMode = GIN_SEARCH_MODE_DEFAULT;
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break;
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case RTContainedByStrategyNumber:
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case RTOldContainedByStrategyNumber:
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/* empty set is contained in everything */
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*searchMode = GIN_SEARCH_MODE_INCLUDE_EMPTY;
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break;
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case RTSameStrategyNumber:
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if (*nentries > 0)
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*searchMode = GIN_SEARCH_MODE_DEFAULT;
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else
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*searchMode = GIN_SEARCH_MODE_INCLUDE_EMPTY;
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break;
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case RTContainsStrategyNumber:
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case RTOldContainsStrategyNumber:
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if (*nentries > 0)
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*searchMode = GIN_SEARCH_MODE_DEFAULT;
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else /* everything contains the empty set */
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*searchMode = GIN_SEARCH_MODE_ALL;
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break;
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default:
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elog(ERROR, "ginint4_queryextract: unknown strategy number: %d",
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strategy);
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}
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}
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PG_RETURN_POINTER(res);
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}
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PG_FUNCTION_INFO_V1(ginint4_consistent);
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Datum
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ginint4_consistent(PG_FUNCTION_ARGS)
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{
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bool *check = (bool *) PG_GETARG_POINTER(0);
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StrategyNumber strategy = PG_GETARG_UINT16(1);
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int32 nkeys = PG_GETARG_INT32(3);
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/* Pointer *extra_data = (Pointer *) PG_GETARG_POINTER(4); */
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bool *recheck = (bool *) PG_GETARG_POINTER(5);
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bool res = FALSE;
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int32 i;
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switch (strategy)
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{
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case RTOverlapStrategyNumber:
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/* result is not lossy */
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*recheck = false;
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/* at least one element in check[] is true, so result = true */
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res = TRUE;
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break;
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case RTContainedByStrategyNumber:
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case RTOldContainedByStrategyNumber:
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/* we will need recheck */
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*recheck = true;
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/* at least one element in check[] is true, so result = true */
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res = TRUE;
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break;
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case RTSameStrategyNumber:
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/* we will need recheck */
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*recheck = true;
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/* Must have all elements in check[] true */
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res = TRUE;
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for (i = 0; i < nkeys; i++)
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{
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if (!check[i])
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{
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res = FALSE;
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break;
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}
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}
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break;
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case RTContainsStrategyNumber:
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case RTOldContainsStrategyNumber:
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/* result is not lossy */
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*recheck = false;
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/* Must have all elements in check[] true */
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res = TRUE;
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for (i = 0; i < nkeys; i++)
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{
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if (!check[i])
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{
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res = FALSE;
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break;
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}
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}
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break;
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case BooleanSearchStrategy:
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{
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QUERYTYPE *query = PG_GETARG_QUERYTYPE_P(2);
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/* result is not lossy */
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*recheck = false;
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res = gin_bool_consistent(query, check);
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}
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break;
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default:
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elog(ERROR, "ginint4_consistent: unknown strategy number: %d",
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strategy);
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}
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PG_RETURN_BOOL(res);
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}
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