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Data Structures
struct	ParamExternData

struct	ParamListInfoData

struct	ParamExecData

struct	ParamsErrorCbData

Macros
#define	PARAM_FLAG_CONST 0x0001 /* parameter is constant */

Typedefs
typedef struct ParamExternData	ParamExternData

typedef struct ParamListInfoData *	ParamListInfo

typedef ParamExternData (	ParamFetchHook) (ParamListInfo params, int paramid, bool speculative, ParamExternData *workspace)

typedef void(*	ParamCompileHook) (ParamListInfo params, struct Param param, struct ExprState state, Datum resv, bool resnull)

typedef void(*	ParserSetupHook) (struct ParseState pstate, void arg)

typedef struct ParamListInfoData	ParamListInfoData

typedef struct ParamExecData	ParamExecData

typedef struct ParamsErrorCbData	ParamsErrorCbData

Functions
ParamListInfo	makeParamList (int numParams)

ParamListInfo	copyParamList (ParamListInfo from)

Size	EstimateParamListSpace (ParamListInfo paramLI)

void	SerializeParamList (ParamListInfo paramLI, char **start_address)

ParamListInfo	RestoreParamList (char **start_address)

char *	BuildParamLogString (ParamListInfo params, char **knownTextValues, int maxlen)

void	ParamsErrorCallback (void *arg)

Macro Definition Documentation

◆ PARAM_FLAG_CONST

#define PARAM_FLAG_CONST 0x0001 /* parameter is constant */

Definition at line 88 of file params.h.

Typedef Documentation

◆ ParamCompileHook

typedef void(* ParamCompileHook) (ParamListInfo params, struct Param *param, struct ExprState *state, Datum *resv, bool *resnull)

Definition at line 104 of file params.h.

◆ ParamExecData

typedef struct ParamExecData ParamExecData

◆ ParamExternData

typedef struct ParamExternData ParamExternData

◆ ParamFetchHook

typedef ParamExternData *(* ParamFetchHook) (ParamListInfo params, int paramid, bool speculative, ParamExternData *workspace)

Definition at line 100 of file params.h.

◆ ParamListInfo

typedef struct ParamListInfoData* ParamListInfo

Definition at line 98 of file params.h.

◆ ParamListInfoData

typedef struct ParamListInfoData ParamListInfoData

◆ ParamsErrorCbData

typedef struct ParamsErrorCbData ParamsErrorCbData

◆ ParserSetupHook

typedef void(* ParserSetupHook) (struct ParseState *pstate, void *arg)

Definition at line 108 of file params.h.

Function Documentation

◆ BuildParamLogString()

char * BuildParamLogString	(	ParamListInfo	params,
		char **	knownTextValues,
		int	maxlen
	)

Definition at line 335 of file params.c.

{
    MemoryContext tmpCxt,
                oldCxt;
    StringInfoData buf;
 
    /*
     * NB: think not of returning params->paramValuesStr!  It may have been
     * generated with a different maxlen, and so be unsuitable.  Besides that,
     * this is the function used to create that string.
     */
 
    /*
     * No work if the param fetch hook is in use.  Also, it's not possible to
     * do this in an aborted transaction.  (It might be possible to improve on
     * this last point when some knownTextValues exist, but it seems tricky.)
     */
    if (params->paramFetch != NULL ||
        IsAbortedTransactionBlockState())
        return NULL;
 
    /* Initialize the output stringinfo, in caller's memory context */
    initStringInfo(&buf);
 
    /* Use a temporary context to call output functions, just in case */
    tmpCxt = AllocSetContextCreate(CurrentMemoryContext,
                                   "BuildParamLogString",
                                   ALLOCSET_DEFAULT_SIZES);
    oldCxt = MemoryContextSwitchTo(tmpCxt);
 
    for (int paramno = 0; paramno < params->numParams; paramno++)
    {
        ParamExternData *param = &params->params[paramno];
 
        appendStringInfo(&buf,
                         "%s$%d = ",
                         paramno > 0 ? ", " : "",
                         paramno + 1);
 
        if (param->isnull || !OidIsValid(param->ptype))
            appendStringInfoString(&buf, "NULL");
        else
        {
            if (knownTextValues != NULL && knownTextValues[paramno] != NULL)
                appendStringInfoStringQuoted(&buf, knownTextValues[paramno],
                                             maxlen);
            else
            {
                Oid         typoutput;
                bool        typisvarlena;
                char       *pstring;
 
                getTypeOutputInfo(param->ptype, &typoutput, &typisvarlena);
                pstring = OidOutputFunctionCall(typoutput, param->value);
                appendStringInfoStringQuoted(&buf, pstring, maxlen);
            }
        }
    }
 
    MemoryContextSwitchTo(oldCxt);
    MemoryContextDelete(tmpCxt);
 
    return buf.data;
}

References ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, appendStringInfo(), appendStringInfoString(), appendStringInfoStringQuoted(), buf, CurrentMemoryContext, getTypeOutputInfo(), initStringInfo(), IsAbortedTransactionBlockState(), ParamExternData::isnull, MemoryContextDelete(), MemoryContextSwitchTo(), ParamListInfoData::numParams, OidIsValid, OidOutputFunctionCall(), ParamListInfoData::paramFetch, ParamListInfoData::params, ParamExternData::ptype, and ParamExternData::value.

Referenced by errdetail_params(), exec_bind_message(), and ExplainQueryParameters().

◆ copyParamList()

ParamListInfo copyParamList ( ParamListInfo from )

Definition at line 78 of file params.c.

{
    ParamListInfo retval;
 
    if (from == NULL || from->numParams <= 0)
        return NULL;
 
    retval = makeParamList(from->numParams);
 
    for (int i = 0; i < from->numParams; i++)
    {
        ParamExternData *oprm;
        ParamExternData *nprm = &retval->params[i];
        ParamExternData prmdata;
        int16       typLen;
        bool        typByVal;
 
        /* give hook a chance in case parameter is dynamic */
        if (from->paramFetch != NULL)
            oprm = from->paramFetch(from, i + 1, false, &prmdata);
        else
            oprm = &from->params[i];
 
        /* flat-copy the parameter info */
        *nprm = *oprm;
 
        /* need datumCopy in case it's a pass-by-reference datatype */
        if (nprm->isnull || !OidIsValid(nprm->ptype))
            continue;
        get_typlenbyval(nprm->ptype, &typLen, &typByVal);
        nprm->value = datumCopy(nprm->value, typByVal, typLen);
    }
 
    return retval;
}

References datumCopy(), get_typlenbyval(), i, ParamExternData::isnull, makeParamList(), ParamListInfoData::numParams, OidIsValid, ParamListInfoData::paramFetch, ParamListInfoData::params, ParamExternData::ptype, and ParamExternData::value.

Referenced by PerformCursorOpen(), and SPI_cursor_open_internal().

◆ EstimateParamListSpace()

Size EstimateParamListSpace ( ParamListInfo paramLI )

Definition at line 167 of file params.c.

{
    int         i;
    Size        sz = sizeof(int);
 
    if (paramLI == NULL || paramLI->numParams <= 0)
        return sz;
 
    for (i = 0; i < paramLI->numParams; i++)
    {
        ParamExternData *prm;
        ParamExternData prmdata;
        Oid         typeOid;
        int16       typLen;
        bool        typByVal;
 
        /* give hook a chance in case parameter is dynamic */
        if (paramLI->paramFetch != NULL)
            prm = paramLI->paramFetch(paramLI, i + 1, false, &prmdata);
        else
            prm = &paramLI->params[i];
 
        typeOid = prm->ptype;
 
        sz = add_size(sz, sizeof(Oid)); /* space for type OID */
        sz = add_size(sz, sizeof(uint16));  /* space for pflags */
 
        /* space for datum/isnull */
        if (OidIsValid(typeOid))
            get_typlenbyval(typeOid, &typLen, &typByVal);
        else
        {
            /* If no type OID, assume by-value, like copyParamList does. */
            typLen = sizeof(Datum);
            typByVal = true;
        }
        sz = add_size(sz,
                      datumEstimateSpace(prm->value, prm->isnull, typByVal, typLen));
    }
 
    return sz;
}

References add_size(), datumEstimateSpace(), get_typlenbyval(), i, ParamExternData::isnull, ParamListInfoData::numParams, OidIsValid, ParamListInfoData::paramFetch, ParamListInfoData::params, ParamExternData::ptype, and ParamExternData::value.

Referenced by ExecInitParallelPlan().

◆ makeParamList()

ParamListInfo makeParamList ( int numParams )

Definition at line 44 of file params.c.

{
    ParamListInfo retval;
    Size        size;
 
    size = offsetof(ParamListInfoData, params) +
        numParams * sizeof(ParamExternData);
 
    retval = (ParamListInfo) palloc(size);
    retval->paramFetch = NULL;
    retval->paramFetchArg = NULL;
    retval->paramCompile = NULL;
    retval->paramCompileArg = NULL;
    retval->parserSetup = paramlist_parser_setup;
    retval->parserSetupArg = retval;
    retval->paramValuesStr = NULL;
    retval->numParams = numParams;
 
    return retval;
}

References ParamListInfoData::numParams, palloc(), ParamListInfoData::paramCompile, ParamListInfoData::paramCompileArg, ParamListInfoData::paramFetch, ParamListInfoData::paramFetchArg, paramlist_parser_setup(), ParamListInfoData::paramValuesStr, ParamListInfoData::parserSetup, and ParamListInfoData::parserSetupArg.

Referenced by _SPI_convert_params(), copyParamList(), EvaluateParams(), exec_bind_message(), exec_eval_using_params(), plpgsql_estate_setup(), postquel_sub_params(), and RestoreParamList().

◆ ParamsErrorCallback()

void ParamsErrorCallback ( void * arg )

Definition at line 407 of file params.c.

{
    ParamsErrorCbData *data = (ParamsErrorCbData *) arg;
 
    if (data == NULL ||
        data->params == NULL ||
        data->params->paramValuesStr == NULL)
        return;
 
    if (data->portalName && data->portalName[0] != '\0')
        errcontext("portal \"%s\" with parameters: %s",
                   data->portalName, data->params->paramValuesStr);
    else
        errcontext("unnamed portal with parameters: %s",
                   data->params->paramValuesStr);
}

References arg, data, and errcontext.

Referenced by exec_bind_message(), and exec_execute_message().

◆ RestoreParamList()

ParamListInfo RestoreParamList ( char ** start_address )

Definition at line 292 of file params.c.

{
    ParamListInfo paramLI;
    int         nparams;
 
    memcpy(&nparams, *start_address, sizeof(int));
    *start_address += sizeof(int);
 
    paramLI = makeParamList(nparams);
 
    for (int i = 0; i < nparams; i++)
    {
        ParamExternData *prm = &paramLI->params[i];
 
        /* Read type OID. */
        memcpy(&prm->ptype, *start_address, sizeof(Oid));
        *start_address += sizeof(Oid);
 
        /* Read flags. */
        memcpy(&prm->pflags, *start_address, sizeof(uint16));
        *start_address += sizeof(uint16);
 
        /* Read datum/isnull. */
        prm->value = datumRestore(start_address, &prm->isnull);
    }
 
    return paramLI;
}

References datumRestore(), i, ParamExternData::isnull, makeParamList(), ParamListInfoData::params, ParamExternData::pflags, ParamExternData::ptype, and ParamExternData::value.

Referenced by ExecParallelGetQueryDesc().

◆ SerializeParamList()

void SerializeParamList	(	ParamListInfo	paramLI,
		char **	start_address
	)

Definition at line 229 of file params.c.

{
    int         nparams;
    int         i;
 
    /* Write number of parameters. */
    if (paramLI == NULL || paramLI->numParams <= 0)
        nparams = 0;
    else
        nparams = paramLI->numParams;
    memcpy(*start_address, &nparams, sizeof(int));
    *start_address += sizeof(int);
 
    /* Write each parameter in turn. */
    for (i = 0; i < nparams; i++)
    {
        ParamExternData *prm;
        ParamExternData prmdata;
        Oid         typeOid;
        int16       typLen;
        bool        typByVal;
 
        /* give hook a chance in case parameter is dynamic */
        if (paramLI->paramFetch != NULL)
            prm = paramLI->paramFetch(paramLI, i + 1, false, &prmdata);
        else
            prm = &paramLI->params[i];
 
        typeOid = prm->ptype;
 
        /* Write type OID. */
        memcpy(*start_address, &typeOid, sizeof(Oid));
        *start_address += sizeof(Oid);
 
        /* Write flags. */
        memcpy(*start_address, &prm->pflags, sizeof(uint16));
        *start_address += sizeof(uint16);
 
        /* Write datum/isnull. */
        if (OidIsValid(typeOid))
            get_typlenbyval(typeOid, &typLen, &typByVal);
        else
        {
            /* If no type OID, assume by-value, like copyParamList does. */
            typLen = sizeof(Datum);
            typByVal = true;
        }
        datumSerialize(prm->value, prm->isnull, typByVal, typLen,
                       start_address);
    }
}

References datumSerialize(), get_typlenbyval(), i, ParamExternData::isnull, ParamListInfoData::numParams, OidIsValid, ParamListInfoData::paramFetch, ParamListInfoData::params, ParamExternData::pflags, ParamExternData::ptype, and ParamExternData::value.