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Update cbtree.cpp

This commit is contained in:
p5kenirwc 2023-09-26 20:46:47 +08:00
parent dc5e8d75ff
commit 4268d46c07
1 changed files with 29 additions and 3 deletions
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32
src/gausskernel/storage/access/cbtree/cbtree.cpp
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@ -145,19 +145,34 @@ Datum cbtreecanreturn(PG_FUNCTION_ARGS)
{
PG_RETURN_BOOL(true);
}
/*
function name:cbtreeoptions
description:This function is part of handling the CBTree index.
Note: The main process is as follows:
STEP1:To get the default relationship options, if the `validate` parameter is true, then the `default_reloptions` function will validate the validity of the options.
STEP2:If filledOption is null,return Datum(0),else return Datum(filledOption)
date: 2023/9/17
*/
Datum cbtreeoptions(PG_FUNCTION_ARGS)
{
Datum indexRelOptions = PG_GETARG_DATUM(0);
bool validate = PG_GETARG_BOOL(1);
bytea *filledOption = default_reloptions(indexRelOptions, validate, RELOPT_KIND_CBTREE);
bytea *filledOption = default_reloptions(indexRelOptions, validate, RELOPT_KIND_CBTREE);//To get the default relationship options, if the `validate` parameter is true, then the `default_reloptions` function will validate the validity of the options.
if (filledOption != NULL)
PG_RETURN_BYTEA_P(filledOption);
PG_RETURN_NULL();
}
/*
function name:cbtreegettuple
description:This function is part of handling the CBTree index.
Note: The main process is as follows:
STEP1:The function first checks whether the scan parameter is NULL. If it is, it will report an error and exit.
STEP2:The function calls the _bt_gettuple_internal function to get the tuple.And returns a boolean value indicating whether the tuple was successfully obtained.
STEP3:The cbtreegettuple function returns the result of the _bt_gettuple_internal function
date: 2023/9/17
*/
Datum cbtreegettuple(PG_FUNCTION_ARGS)
{
IndexScanDesc scan = (IndexScanDesc)PG_GETARG_POINTER(0);
@ -182,6 +197,17 @@ Datum cbtreegettuple(PG_FUNCTION_ARGS)
* @IN param isnulls: the container to use temprarily
* @IN param transferFuncs: the transfer functions array
*/
/*
function name:InsertToBtree
description:This function is part of handling the CBTree index.
Note: The main process is as follows:
STEP1:It gets the number of rows in the batch and adds this to reltuples.
STEP2:For each row in the batch, it does the following:checking if the value is null. If it is, it sets the corresponding entry in isnulls to true. Otherwise, it sets it to false and converts the scalar value to a datum using the corresponding transfer function.
And it gets the item pointer (tid) for the row.
STEP3:It calls _bt_spool to add the tid and values to the B-tree spool.
STEP4:add buildstate.indtuples.
date: 2023/9/17
*/
static void InsertToBtree(VectorBatch *vecScanBatch, BTBuildState &buildstate, IndexInfo *indexInfo, double &reltuples,
Datum *values, bool *isnulls, ScalarToDatum *transferFuncs)
{