diff options
Diffstat (limited to 'src/backend/executor/nodeAgg.c')
| -rw-r--r-- | src/backend/executor/nodeAgg.c | 58 |
1 files changed, 29 insertions, 29 deletions
diff --git a/src/backend/executor/nodeAgg.c b/src/backend/executor/nodeAgg.c index 186c319a3a2..09ff03543df 100644 --- a/src/backend/executor/nodeAgg.c +++ b/src/backend/executor/nodeAgg.c @@ -25,7 +25,7 @@ * The agg's first input type and transtype must be the same in this case! * * If transfunc is marked "strict" then NULL input_values are skipped, - * keeping the previous transvalue. If transfunc is not strict then it + * keeping the previous transvalue. If transfunc is not strict then it * is called for every input tuple and must deal with NULL initcond * or NULL input_values for itself. * @@ -66,7 +66,7 @@ * it is completely forbidden for functions to modify pass-by-ref inputs, * but in the aggregate case we know the left input is either the initial * transition value or a previous function result, and in either case its - * value need not be preserved. See int8inc() for an example. Notice that + * value need not be preserved. See int8inc() for an example. Notice that * advance_transition_function() is coded to avoid a data copy step when * the previous transition value pointer is returned. Also, some * transition functions want to store working state in addition to the @@ -132,14 +132,14 @@ typedef struct AggStatePerAggData Aggref *aggref; /* - * Nominal number of arguments for aggregate function. For plain aggs, - * this excludes any ORDER BY expressions. For ordered-set aggs, this + * Nominal number of arguments for aggregate function. For plain aggs, + * this excludes any ORDER BY expressions. For ordered-set aggs, this * counts both the direct and aggregated (ORDER BY) arguments. */ int numArguments; /* - * Number of aggregated input columns. This includes ORDER BY expressions + * Number of aggregated input columns. This includes ORDER BY expressions * in both the plain-agg and ordered-set cases. Ordered-set direct args * are not counted, though. */ @@ -153,7 +153,7 @@ typedef struct AggStatePerAggData int numTransInputs; /* - * Number of arguments to pass to the finalfn. This is always at least 1 + * Number of arguments to pass to the finalfn. This is always at least 1 * (the transition state value) plus any ordered-set direct args. If the * finalfn wants extra args then we pass nulls corresponding to the * aggregated input columns. @@ -216,7 +216,7 @@ typedef struct AggStatePerAggData transtypeByVal; /* - * Stuff for evaluation of inputs. We used to just use ExecEvalExpr, but + * Stuff for evaluation of inputs. We used to just use ExecEvalExpr, but * with the addition of ORDER BY we now need at least a slot for passing * data to the sort object, which requires a tupledesc, so we might as * well go whole hog and use ExecProject too. @@ -236,7 +236,7 @@ typedef struct AggStatePerAggData * input tuple group and updated for each input tuple. * * For a simple (non DISTINCT/ORDER BY) aggregate, we just feed the input - * values straight to the transition function. If it's DISTINCT or + * values straight to the transition function. If it's DISTINCT or * requires ORDER BY, we pass the input values into a Tuplesort object; * then at completion of the input tuple group, we scan the sorted values, * eliminate duplicates if needed, and run the transition function on the @@ -279,7 +279,7 @@ typedef struct AggStatePerGroupData /* * Note: noTransValue initially has the same value as transValueIsNull, - * and if true both are cleared to false at the same time. They are not + * and if true both are cleared to false at the same time. They are not * the same though: if transfn later returns a NULL, we want to keep that * NULL and not auto-replace it with a later input value. Only the first * non-NULL input will be auto-substituted. @@ -289,7 +289,7 @@ typedef struct AggStatePerGroupData /* * To implement hashed aggregation, we need a hashtable that stores a * representative tuple and an array of AggStatePerGroup structs for each - * distinct set of GROUP BY column values. We compute the hash key from + * distinct set of GROUP BY column values. We compute the hash key from * the GROUP BY columns. */ typedef struct AggHashEntryData *AggHashEntry; @@ -416,7 +416,7 @@ initialize_aggregates(AggState *aggstate, * * The new values (and null flags) have been preloaded into argument positions * 1 and up in peraggstate->transfn_fcinfo, so that we needn't copy them again - * to pass to the transition function. We also expect that the static fields + * to pass to the transition function. We also expect that the static fields * of the fcinfo are already initialized; that was done by ExecInitAgg(). * * It doesn't matter which memory context this is called in. @@ -495,7 +495,7 @@ advance_transition_function(AggState *aggstate, /* * If pass-by-ref datatype, must copy the new value into aggcontext and - * pfree the prior transValue. But if transfn returned a pointer to its + * pfree the prior transValue. But if transfn returned a pointer to its * first input, we don't need to do anything. */ if (!peraggstate->transtypeByVal && @@ -519,7 +519,7 @@ advance_transition_function(AggState *aggstate, } /* - * Advance all the aggregates for one input tuple. The input tuple + * Advance all the aggregates for one input tuple. The input tuple * has been stored in tmpcontext->ecxt_outertuple, so that it is accessible * to ExecEvalExpr. pergroup is the array of per-group structs to use * (this might be in a hashtable entry). @@ -609,7 +609,7 @@ advance_aggregates(AggState *aggstate, AggStatePerGroup pergroup) /* * Run the transition function for a DISTINCT or ORDER BY aggregate * with only one input. This is called after we have completed - * entering all the input values into the sort object. We complete the + * entering all the input values into the sort object. We complete the * sort, read out the values in sorted order, and run the transition * function on each value (applying DISTINCT if appropriate). * @@ -705,7 +705,7 @@ process_ordered_aggregate_single(AggState *aggstate, /* * Run the transition function for a DISTINCT or ORDER BY aggregate * with more than one input. This is called after we have completed - * entering all the input values into the sort object. We complete the + * entering all the input values into the sort object. We complete the * sort, read out the values in sorted order, and run the transition * function on each value (applying DISTINCT if appropriate). * @@ -1070,9 +1070,9 @@ lookup_hash_entry(AggState *aggstate, TupleTableSlot *inputslot) * the appropriate attribute for each aggregate function use (Aggref * node) appearing in the targetlist or qual of the node. The number * of tuples to aggregate over depends on whether grouped or plain - * aggregation is selected. In grouped aggregation, we produce a result + * aggregation is selected. In grouped aggregation, we produce a result * row for each group; in plain aggregation there's a single result row - * for the whole query. In either case, the value of each aggregate is + * for the whole query. In either case, the value of each aggregate is * stored in the expression context to be used when ExecProject evaluates * the result tuple. */ @@ -1097,7 +1097,7 @@ ExecAgg(AggState *node) } /* - * Exit if nothing left to do. (We must do the ps_TupFromTlist check + * Exit if nothing left to do. (We must do the ps_TupFromTlist check * first, because in some cases agg_done gets set before we emit the final * aggregate tuple, and we have to finish running SRFs for it.) */ @@ -1181,11 +1181,11 @@ agg_retrieve_direct(AggState *aggstate) /* * Clear the per-output-tuple context for each group, as well as * aggcontext (which contains any pass-by-ref transvalues of the old - * group). We also clear any child contexts of the aggcontext; some + * group). We also clear any child contexts of the aggcontext; some * aggregate functions store working state in such contexts. * * We use ReScanExprContext not just ResetExprContext because we want - * any registered shutdown callbacks to be called. That allows + * any registered shutdown callbacks to be called. That allows * aggregate functions to ensure they've cleaned up any non-memory * resources. */ @@ -1518,8 +1518,8 @@ ExecInitAgg(Agg *node, EState *estate, int eflags) aggstate->hashtable = NULL; /* - * Create expression contexts. We need two, one for per-input-tuple - * processing and one for per-output-tuple processing. We cheat a little + * Create expression contexts. We need two, one for per-input-tuple + * processing and one for per-output-tuple processing. We cheat a little * by using ExecAssignExprContext() to build both. */ ExecAssignExprContext(estate, &aggstate->ss.ps); @@ -1552,7 +1552,7 @@ ExecInitAgg(Agg *node, EState *estate, int eflags) * initialize child expressions * * Note: ExecInitExpr finds Aggrefs for us, and also checks that no aggs - * contain other agg calls in their arguments. This would make no sense + * contain other agg calls in their arguments. This would make no sense * under SQL semantics anyway (and it's forbidden by the spec). Because * that is true, we don't need to worry about evaluating the aggs in any * particular order. @@ -1599,7 +1599,7 @@ ExecInitAgg(Agg *node, EState *estate, int eflags) * This is not an error condition: we might be using the Agg node just * to do hash-based grouping. Even in the regular case, * constant-expression simplification could optimize away all of the - * Aggrefs in the targetlist and qual. So keep going, but force local + * Aggrefs in the targetlist and qual. So keep going, but force local * copy of numaggs positive so that palloc()s below don't choke. */ numaggs = 1; @@ -1760,7 +1760,7 @@ ExecInitAgg(Agg *node, EState *estate, int eflags) } /* - * Get actual datatypes of the (nominal) aggregate inputs. These + * Get actual datatypes of the (nominal) aggregate inputs. These * could be different from the agg's declared input types, when the * agg accepts ANY or a polymorphic type. */ @@ -1852,7 +1852,7 @@ ExecInitAgg(Agg *node, EState *estate, int eflags) * If the transfn is strict and the initval is NULL, make sure input * type and transtype are the same (or at least binary-compatible), so * that it's OK to use the first aggregated input value as the initial - * transValue. This should have been checked at agg definition time, + * transValue. This should have been checked at agg definition time, * but we must check again in case the transfn's strictness property * has been changed. */ @@ -1885,7 +1885,7 @@ ExecInitAgg(Agg *node, EState *estate, int eflags) /* * If we're doing either DISTINCT or ORDER BY for a plain agg, then we * have a list of SortGroupClause nodes; fish out the data in them and - * stick them into arrays. We ignore ORDER BY for an ordered-set agg, + * stick them into arrays. We ignore ORDER BY for an ordered-set agg, * however; the agg's transfn and finalfn are responsible for that. * * Note that by construction, if there is a DISTINCT clause then the @@ -2144,8 +2144,8 @@ ExecReScanAgg(AggState *node) * * The transition and/or final functions of an aggregate may want to verify * that they are being called as aggregates, rather than as plain SQL - * functions. They should use this function to do so. The return value - * is nonzero if being called as an aggregate, or zero if not. (Specific + * functions. They should use this function to do so. The return value + * is nonzero if being called as an aggregate, or zero if not. (Specific * nonzero values are AGG_CONTEXT_AGGREGATE or AGG_CONTEXT_WINDOW, but more * values could conceivably appear in future.) * |