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Rename libpq trace internal functions 

libpq's pqTraceOutputMessage() used to look like this:

    case 'Z':               /* Ready For Query */
        pqTraceOutputZ(conn->Pfdebug, message, &logCursor);
        break;

Commit f4b54e1ed9 introduced macros for protocol characters, so now
it looks like this:

    case PqMsg_ReadyForQuery:
        pqTraceOutputZ(conn->Pfdebug, message, &logCursor);
        break;

But this introduced a disconnect between the symbol in the switch case
and the function name to be called, so this made the manageability of
this file a bit worse.

This patch changes the function names to match, so now it looks like
this:

    case PqMsg_ReadyForQuery:
        pqTraceOutput_ReadyForQuery(conn->Pfdebug, message, &logCursor);
        break;

(This also improves the readability of the file in general, since some
function names like "pqTraceOutputt" were a little hard to read
accurately.)

Some protocol characters have different meanings to and from the
server.  The old code structure had a common function for both, for
example, pqTraceOutputD().  The new structure splits this up into
separate ones to match the protocol message name, like
pqTraceOutput_Describe() and pqTraceOutput_DataRow().

Reviewed-by: Yugo NAGATA <nagata@sraoss.co.jp>
Discussion: https://www.postgresql.org/message-id/flat/575e4f9d-acfe-45e3-b7f1-7e32c579090e%40eisentraut.org
This commit is contained in:
Peter Eisentraut 2024-05-02 15:59:27 +02:00
parent 13daa33fa5
commit 42510c031b
1 changed files with 101 additions and 109 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

210
src/interfaces/libpq/fe-trace.c
View File

@ -215,9 +215,8 @@ pqTraceOutputNchar(FILE *pfdebug, int len, const char *data, int *cursor)
* Output functions by protocol message type
*/
/* NotificationResponse */
static void
pqTraceOutputA(FILE *f, const char *message, int *cursor, bool regress)
pqTraceOutput_NotificationResponse(FILE *f, const char *message, int *cursor, bool regress)
{
fprintf(f, "NotificationResponse\t");
pqTraceOutputInt32(f, message, cursor, regress);
@ -225,9 +224,8 @@ pqTraceOutputA(FILE *f, const char *message, int *cursor, bool regress)
pqTraceOutputString(f, message, cursor, false);
}
/* Bind */
static void
pqTraceOutputB(FILE *f, const char *message, int *cursor)
pqTraceOutput_Bind(FILE *f, const char *message, int *cursor)
{
int nparams;
@ -256,52 +254,48 @@ pqTraceOutputB(FILE *f, const char *message, int *cursor)
pqTraceOutputInt16(f, message, cursor);
}
/* Close(F) or CommandComplete(B) */
static void
pqTraceOutputC(FILE *f, bool toServer, const char *message, int *cursor)
pqTraceOutput_Close(FILE *f, const char *message, int *cursor)
{
if (toServer)
fprintf(f, "Close\t");
pqTraceOutputByte1(f, message, cursor);
pqTraceOutputString(f, message, cursor, false);
}
static void
pqTraceOutput_CommandComplete(FILE *f, const char *message, int *cursor)
{
fprintf(f, "CommandComplete\t");
pqTraceOutputString(f, message, cursor, false);
}
static void
pqTraceOutput_DataRow(FILE *f, const char *message, int *cursor)
{
int nfields;
int len;
int i;
fprintf(f, "DataRow\t");
nfields = pqTraceOutputInt16(f, message, cursor);
for (i = 0; i < nfields; i++)
{
fprintf(f, "Close\t");
pqTraceOutputByte1(f, message, cursor);
pqTraceOutputString(f, message, cursor, false);
}
else
{
fprintf(f, "CommandComplete\t");
pqTraceOutputString(f, message, cursor, false);
len = pqTraceOutputInt32(f, message, cursor, false);
if (len == -1)
continue;
pqTraceOutputNchar(f, len, message, cursor);
}
}
/* Describe(F) or DataRow(B) */
static void
pqTraceOutputD(FILE *f, bool toServer, const char *message, int *cursor)
pqTraceOutput_Describe(FILE *f, const char *message, int *cursor)
{
if (toServer)
{
fprintf(f, "Describe\t");
pqTraceOutputByte1(f, message, cursor);
pqTraceOutputString(f, message, cursor, false);
}
else
{
int nfields;
int len;
int i;
fprintf(f, "DataRow\t");
nfields = pqTraceOutputInt16(f, message, cursor);
for (i = 0; i < nfields; i++)
{
len = pqTraceOutputInt32(f, message, cursor, false);
if (len == -1)
continue;
pqTraceOutputNchar(f, len, message, cursor);
}
}
fprintf(f, "Describe\t");
pqTraceOutputByte1(f, message, cursor);
pqTraceOutputString(f, message, cursor, false);
}
/* NoticeResponse / ErrorResponse */
/* shared code NoticeResponse / ErrorResponse */
static void
pqTraceOutputNR(FILE *f, const char *type, const char *message, int *cursor,
bool regress)
@ -322,31 +316,35 @@ pqTraceOutputNR(FILE *f, const char *type, const char *message, int *cursor,
}
}
/* Execute(F) or ErrorResponse(B) */
static void
pqTraceOutputE(FILE *f, bool toServer, const char *message, int *cursor, bool regress)
pqTraceOutput_ErrorResponse(FILE *f, const char *message, int *cursor, bool regress)
{
if (toServer)
{
fprintf(f, "Execute\t");
pqTraceOutputString(f, message, cursor, false);
pqTraceOutputInt32(f, message, cursor, false);
}
else
pqTraceOutputNR(f, "ErrorResponse", message, cursor, regress);
pqTraceOutputNR(f, "ErrorResponse", message, cursor, regress);
}
/* CopyFail */
static void
pqTraceOutputf(FILE *f, const char *message, int *cursor)
pqTraceOutput_NoticeResponse(FILE *f, const char *message, int *cursor, bool regress)
{
pqTraceOutputNR(f, "NoticeResponse", message, cursor, regress);
}
static void
pqTraceOutput_Execute(FILE *f, const char *message, int *cursor, bool regress)
{
fprintf(f, "Execute\t");
pqTraceOutputString(f, message, cursor, false);
pqTraceOutputInt32(f, message, cursor, false);
}
static void
pqTraceOutput_CopyFail(FILE *f, const char *message, int *cursor)
{
fprintf(f, "CopyFail\t");
pqTraceOutputString(f, message, cursor, false);
}
/* FunctionCall */
static void
pqTraceOutputF(FILE *f, const char *message, int *cursor, bool regress)
pqTraceOutput_FunctionCall(FILE *f, const char *message, int *cursor, bool regress)
{
int nfields;
int nbytes;
@ -371,9 +369,8 @@ pqTraceOutputF(FILE *f, const char *message, int *cursor, bool regress)
pqTraceOutputInt16(f, message, cursor);
}
/* CopyInResponse */
static void
pqTraceOutputG(FILE *f, const char *message, int *cursor)
pqTraceOutput_CopyInResponse(FILE *f, const char *message, int *cursor)
{
int nfields;
@ -385,9 +382,8 @@ pqTraceOutputG(FILE *f, const char *message, int *cursor)
pqTraceOutputInt16(f, message, cursor);
}
/* CopyOutResponse */
static void
pqTraceOutputH(FILE *f, const char *message, int *cursor)
pqTraceOutput_CopyOutResponse(FILE *f, const char *message, int *cursor)
{
int nfields;
@ -399,18 +395,16 @@ pqTraceOutputH(FILE *f, const char *message, int *cursor)
pqTraceOutputInt16(f, message, cursor);
}
/* BackendKeyData */
static void
pqTraceOutputK(FILE *f, const char *message, int *cursor, bool regress)
pqTraceOutput_BackendKeyData(FILE *f, const char *message, int *cursor, bool regress)
{
fprintf(f, "BackendKeyData\t");
pqTraceOutputInt32(f, message, cursor, regress);
pqTraceOutputInt32(f, message, cursor, regress);
}
/* Parse */
static void
pqTraceOutputP(FILE *f, const char *message, int *cursor, bool regress)
pqTraceOutput_Parse(FILE *f, const char *message, int *cursor, bool regress)
{
int nparams;
@ -423,34 +417,30 @@ pqTraceOutputP(FILE *f, const char *message, int *cursor, bool regress)
pqTraceOutputInt32(f, message, cursor, regress);
}
/* Query */
static void
pqTraceOutputQ(FILE *f, const char *message, int *cursor)
pqTraceOutput_Query(FILE *f, const char *message, int *cursor)
{
fprintf(f, "Query\t");
pqTraceOutputString(f, message, cursor, false);
}
/* Authentication */
static void
pqTraceOutputR(FILE *f, const char *message, int *cursor)
pqTraceOutput_Authentication(FILE *f, const char *message, int *cursor)
{
fprintf(f, "Authentication\t");
pqTraceOutputInt32(f, message, cursor, false);
}
/* ParameterStatus */
static void
pqTraceOutputS(FILE *f, const char *message, int *cursor)
pqTraceOutput_ParameterStatus(FILE *f, const char *message, int *cursor)
{
fprintf(f, "ParameterStatus\t");
pqTraceOutputString(f, message, cursor, false);
pqTraceOutputString(f, message, cursor, false);
}
/* ParameterDescription */
static void
pqTraceOutputt(FILE *f, const char *message, int *cursor, bool regress)
pqTraceOutput_ParameterDescription(FILE *f, const char *message, int *cursor, bool regress)
{
int nfields;
@ -461,9 +451,8 @@ pqTraceOutputt(FILE *f, const char *message, int *cursor, bool regress)
pqTraceOutputInt32(f, message, cursor, regress);
}
/* RowDescription */
static void
pqTraceOutputT(FILE *f, const char *message, int *cursor, bool regress)
pqTraceOutput_RowDescription(FILE *f, const char *message, int *cursor, bool regress)
{
int nfields;
@ -482,18 +471,16 @@ pqTraceOutputT(FILE *f, const char *message, int *cursor, bool regress)
}
}
/* NegotiateProtocolVersion */
static void
pqTraceOutputv(FILE *f, const char *message, int *cursor)
pqTraceOutput_NegotiateProtocolVersion(FILE *f, const char *message, int *cursor)
{
fprintf(f, "NegotiateProtocolVersion\t");
pqTraceOutputInt32(f, message, cursor, false);
pqTraceOutputInt32(f, message, cursor, false);
}
/* FunctionCallResponse */
static void
pqTraceOutputV(FILE *f, const char *message, int *cursor)
pqTraceOutput_FunctionCallResponse(FILE *f, const char *message, int *cursor)
{
int len;
@ -503,9 +490,8 @@ pqTraceOutputV(FILE *f, const char *message, int *cursor)
pqTraceOutputNchar(f, len, message, cursor);
}
/* CopyBothResponse */
static void
pqTraceOutputW(FILE *f, const char *message, int *cursor, int length)
pqTraceOutput_CopyBothResponse(FILE *f, const char *message, int *cursor, int length)
{
fprintf(f, "CopyBothResponse\t");
pqTraceOutputByte1(f, message, cursor);
@ -514,9 +500,8 @@ pqTraceOutputW(FILE *f, const char *message, int *cursor, int length)
pqTraceOutputInt16(f, message, cursor);
}
/* ReadyForQuery */
static void
pqTraceOutputZ(FILE *f, const char *message, int *cursor)
pqTraceOutput_ReadyForQuery(FILE *f, const char *message, int *cursor)
{
fprintf(f, "ReadyForQuery\t");
pqTraceOutputByte1(f, message, cursor);
@ -555,7 +540,7 @@ pqTraceOutputMessage(PGconn *conn, const char *message, bool toServer)
* name) fields can change as server code is modified, and if their
* lengths differ from the originals, that would break tests.
*/
if (regress && !toServer && (id == 'E' || id == 'N'))
if (regress && !toServer && (id == PqMsg_ErrorResponse || id == PqMsg_NoticeResponse))
fprintf(conn->Pfdebug, "%s\tNN\t", prefix);
else
fprintf(conn->Pfdebug, "%s\t%d\t", prefix, length);
@ -575,10 +560,10 @@ pqTraceOutputMessage(PGconn *conn, const char *message, bool toServer)
/* No message content */
break;
case PqMsg_NotificationResponse:
pqTraceOutputA(conn->Pfdebug, message, &logCursor, regress);
pqTraceOutput_NotificationResponse(conn->Pfdebug, message, &logCursor, regress);
break;
case PqMsg_Bind:
pqTraceOutputB(conn->Pfdebug, message, &logCursor);
pqTraceOutput_Bind(conn->Pfdebug, message, &logCursor);
break;
case PqMsg_CopyDone:
fprintf(conn->Pfdebug, "CopyDone");
@ -587,7 +572,10 @@ pqTraceOutputMessage(PGconn *conn, const char *message, bool toServer)
case PqMsg_CommandComplete:
/* Close(F) and CommandComplete(B) use the same identifier. */
Assert(PqMsg_Close == PqMsg_CommandComplete);
pqTraceOutputC(conn->Pfdebug, toServer, message, &logCursor);
if (toServer)
pqTraceOutput_Close(conn->Pfdebug, message, &logCursor);
else
pqTraceOutput_CommandComplete(conn->Pfdebug, message, &logCursor);
break;
case PqMsg_CopyData:
/* Drop COPY data to reduce the overhead of logging. */
@ -595,88 +583,92 @@ pqTraceOutputMessage(PGconn *conn, const char *message, bool toServer)
case PqMsg_Describe:
/* Describe(F) and DataRow(B) use the same identifier. */
Assert(PqMsg_Describe == PqMsg_DataRow);
pqTraceOutputD(conn->Pfdebug, toServer, message, &logCursor);
if (toServer)
pqTraceOutput_Describe(conn->Pfdebug, message, &logCursor);
else
pqTraceOutput_DataRow(conn->Pfdebug, message, &logCursor);
break;
case PqMsg_Execute:
/* Execute(F) and ErrorResponse(B) use the same identifier. */
Assert(PqMsg_Execute == PqMsg_ErrorResponse);
pqTraceOutputE(conn->Pfdebug, toServer, message, &logCursor,
regress);
if (toServer)
pqTraceOutput_Execute(conn->Pfdebug, message, &logCursor, regress);
else
pqTraceOutput_ErrorResponse(conn->Pfdebug, message, &logCursor, regress);
break;
case PqMsg_CopyFail:
pqTraceOutputf(conn->Pfdebug, message, &logCursor);
pqTraceOutput_CopyFail(conn->Pfdebug, message, &logCursor);
break;
case PqMsg_FunctionCall:
pqTraceOutputF(conn->Pfdebug, message, &logCursor, regress);
pqTraceOutput_FunctionCall(conn->Pfdebug, message, &logCursor, regress);
break;
case PqMsg_CopyInResponse:
pqTraceOutputG(conn->Pfdebug, message, &logCursor);
pqTraceOutput_CopyInResponse(conn->Pfdebug, message, &logCursor);
break;
case PqMsg_Flush:
/* Flush(F) and CopyOutResponse(B) use the same identifier */
Assert(PqMsg_CopyOutResponse == PqMsg_Flush);
if (!toServer)
pqTraceOutputH(conn->Pfdebug, message, &logCursor);
else
if (toServer)
fprintf(conn->Pfdebug, "Flush"); /* no message content */
else
pqTraceOutput_CopyOutResponse(conn->Pfdebug, message, &logCursor);
break;
case PqMsg_EmptyQueryResponse:
fprintf(conn->Pfdebug, "EmptyQueryResponse");
/* No message content */
break;
case PqMsg_BackendKeyData:
pqTraceOutputK(conn->Pfdebug, message, &logCursor, regress);
pqTraceOutput_BackendKeyData(conn->Pfdebug, message, &logCursor, regress);
break;
case PqMsg_NoData:
fprintf(conn->Pfdebug, "NoData");
/* No message content */
break;
case PqMsg_NoticeResponse:
pqTraceOutputNR(conn->Pfdebug, "NoticeResponse", message,
&logCursor, regress);
pqTraceOutput_NoticeResponse(conn->Pfdebug, message, &logCursor, regress);
break;
case PqMsg_Parse:
pqTraceOutputP(conn->Pfdebug, message, &logCursor, regress);
pqTraceOutput_Parse(conn->Pfdebug, message, &logCursor, regress);
break;
case PqMsg_Query:
pqTraceOutputQ(conn->Pfdebug, message, &logCursor);
pqTraceOutput_Query(conn->Pfdebug, message, &logCursor);
break;
case PqMsg_AuthenticationRequest:
pqTraceOutputR(conn->Pfdebug, message, &logCursor);
pqTraceOutput_Authentication(conn->Pfdebug, message, &logCursor);
break;
case PqMsg_PortalSuspended:
fprintf(conn->Pfdebug, "PortalSuspended");
/* No message content */
break;
case PqMsg_Sync:
/* Parameter Status(B) and Sync(F) use the same identifier */
/* ParameterStatus(B) and Sync(F) use the same identifier */
Assert(PqMsg_ParameterStatus == PqMsg_Sync);
if (!toServer)
pqTraceOutputS(conn->Pfdebug, message, &logCursor);
else
if (toServer)
fprintf(conn->Pfdebug, "Sync"); /* no message content */
else
pqTraceOutput_ParameterStatus(conn->Pfdebug, message, &logCursor);
break;
case PqMsg_ParameterDescription:
pqTraceOutputt(conn->Pfdebug, message, &logCursor, regress);
pqTraceOutput_ParameterDescription(conn->Pfdebug, message, &logCursor, regress);
break;
case PqMsg_RowDescription:
pqTraceOutputT(conn->Pfdebug, message, &logCursor, regress);
pqTraceOutput_RowDescription(conn->Pfdebug, message, &logCursor, regress);
break;
case PqMsg_NegotiateProtocolVersion:
pqTraceOutputv(conn->Pfdebug, message, &logCursor);
pqTraceOutput_NegotiateProtocolVersion(conn->Pfdebug, message, &logCursor);
break;
case PqMsg_FunctionCallResponse:
pqTraceOutputV(conn->Pfdebug, message, &logCursor);
pqTraceOutput_FunctionCallResponse(conn->Pfdebug, message, &logCursor);
break;
case PqMsg_CopyBothResponse:
pqTraceOutputW(conn->Pfdebug, message, &logCursor, length);
pqTraceOutput_CopyBothResponse(conn->Pfdebug, message, &logCursor, length);
break;
case PqMsg_Terminate:
fprintf(conn->Pfdebug, "Terminate");
/* No message content */
break;
case PqMsg_ReadyForQuery:
pqTraceOutputZ(conn->Pfdebug, message, &logCursor);
pqTraceOutput_ReadyForQuery(conn->Pfdebug, message, &logCursor);
break;
default:
fprintf(conn->Pfdebug, "Unknown message: %02x", id);