error.c

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/* src/interfaces/ecpg/ecpglib/error.c */
 
#define POSTGRES_ECPG_INTERNAL
#include "postgres_fe.h"
 
#include "ecpgerrno.h"
#include "ecpglib.h"
#include "ecpglib_extern.h"
#include "ecpgtype.h"
#include "sqlca.h"
 
void
ecpg_raise(int line, int code, const char *sqlstate, const char *str)
{
    struct sqlca_t *sqlca = ECPGget_sqlca();
 
    if (sqlca == NULL)
    {
        ecpg_log("out of memory");
        ECPGfree_auto_mem();
        return;
    }
 
    sqlca->sqlcode = code;
    strncpy(sqlca->sqlstate, sqlstate, sizeof(sqlca->sqlstate));
 
    switch (code)
    {
        case ECPG_NOT_FOUND:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("no data found on line %d"), line);
            break;
 
        case ECPG_OUT_OF_MEMORY:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("out of memory on line %d"), line);
            break;
 
        case ECPG_UNSUPPORTED:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("unsupported type \"%s\" on line %d"), str, line);
            break;
 
        case ECPG_TOO_MANY_ARGUMENTS:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("too many arguments on line %d"), line);
            break;
 
        case ECPG_TOO_FEW_ARGUMENTS:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("too few arguments on line %d"), line);
            break;
 
        case ECPG_INT_FORMAT:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("invalid input syntax for type int: \"%s\", on line %d"), str, line);
            break;
 
        case ECPG_UINT_FORMAT:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("invalid input syntax for type unsigned int: \"%s\", on line %d"), str, line);
            break;
 
        case ECPG_FLOAT_FORMAT:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("invalid input syntax for floating-point type: \"%s\", on line %d"), str, line);
            break;
 
        case ECPG_CONVERT_BOOL:
            if (str)
                snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
                /*------
                   translator: this string will be truncated at 149 characters expanded.  */
                         ecpg_gettext("invalid syntax for type boolean: \"%s\", on line %d"), str, line);
            else
                snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
                /*------
                   translator: this string will be truncated at 149 characters expanded.  */
                         ecpg_gettext("could not convert boolean value: size mismatch, on line %d"), line);
            break;
 
        case ECPG_EMPTY:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("empty query on line %d"), line);
            break;
 
        case ECPG_MISSING_INDICATOR:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("null value without indicator on line %d"), line);
            break;
 
        case ECPG_NO_ARRAY:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("variable does not have an array type on line %d"), line);
            break;
 
        case ECPG_DATA_NOT_ARRAY:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("data read from server is not an array on line %d"), line);
            break;
 
        case ECPG_ARRAY_INSERT:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("inserting an array of variables is not supported on line %d"), line);
            break;
 
        case ECPG_NO_CONN:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("connection \"%s\" does not exist on line %d"), str, line);
            break;
 
        case ECPG_NOT_CONN:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("not connected to connection \"%s\" on line %d"), str, line);
            break;
 
        case ECPG_INVALID_STMT:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("invalid statement name \"%s\" on line %d"), str, line);
            break;
 
        case ECPG_UNKNOWN_DESCRIPTOR:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("descriptor \"%s\" not found on line %d"), str, line);
            break;
 
        case ECPG_INVALID_DESCRIPTOR_INDEX:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("descriptor index out of range on line %d"), line);
            break;
 
        case ECPG_UNKNOWN_DESCRIPTOR_ITEM:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("unrecognized descriptor item \"%s\" on line %d"), str, line);
            break;
 
        case ECPG_VAR_NOT_NUMERIC:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("variable does not have a numeric type on line %d"), line);
            break;
 
        case ECPG_VAR_NOT_CHAR:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("variable does not have a character type on line %d"), line);
            break;
 
        case ECPG_TRANS:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("error in transaction processing on line %d"), line);
            break;
 
        case ECPG_CONNECT:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("could not connect to database \"%s\" on line %d"), str, line);
            break;
 
        default:
            snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
            /*------
               translator: this string will be truncated at 149 characters expanded.  */
                     ecpg_gettext("SQL error %d on line %d"), code, line);
            break;
    }
 
    sqlca->sqlerrm.sqlerrml = strlen(sqlca->sqlerrm.sqlerrmc);
    ecpg_log("raising sqlcode %d on line %d: %s\n", code, line, sqlca->sqlerrm.sqlerrmc);
 
    /* free all memory we have allocated for the user */
    ECPGfree_auto_mem();
}
 
void
ecpg_raise_backend(int line, PGresult *result, PGconn *conn, int compat)
{
    struct sqlca_t *sqlca = ECPGget_sqlca();
    char       *sqlstate;
    char       *message;
 
    if (sqlca == NULL)
    {
        ecpg_log("out of memory");
        ECPGfree_auto_mem();
        return;
    }
 
    /*
     * PQresultErrorField will return NULL if "result" is NULL, or if there is
     * no such field, which will happen for libpq-generated errors.  Fall back
     * to PQerrorMessage in such cases.
     */
    sqlstate = PQresultErrorField(result, PG_DIAG_SQLSTATE);
    if (sqlstate == NULL)
        sqlstate = ECPG_SQLSTATE_ECPG_INTERNAL_ERROR;
    message = PQresultErrorField(result, PG_DIAG_MESSAGE_PRIMARY);
    if (message == NULL)
        message = PQerrorMessage(conn);
 
    if (strcmp(sqlstate, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR) == 0)
    {
        /*
         * we might get here if the connection breaks down, so let's check for
         * this instead of giving just the generic internal error
         */
        if (PQstatus(conn) == CONNECTION_BAD)
        {
            sqlstate = "57P02";
            message = ecpg_gettext("the connection to the server was lost");
        }
    }
 
    /* copy error message */
    snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc), "%s on line %d", message, line);
    sqlca->sqlerrm.sqlerrml = strlen(sqlca->sqlerrm.sqlerrmc);
 
    /* copy SQLSTATE */
    strncpy(sqlca->sqlstate, sqlstate, sizeof(sqlca->sqlstate));
 
    /* assign SQLCODE for backward compatibility */
    if (strncmp(sqlca->sqlstate, "23505", sizeof(sqlca->sqlstate)) == 0)
        sqlca->sqlcode = INFORMIX_MODE(compat) ? ECPG_INFORMIX_DUPLICATE_KEY : ECPG_DUPLICATE_KEY;
    else if (strncmp(sqlca->sqlstate, "21000", sizeof(sqlca->sqlstate)) == 0)
        sqlca->sqlcode = INFORMIX_MODE(compat) ? ECPG_INFORMIX_SUBSELECT_NOT_ONE : ECPG_SUBSELECT_NOT_ONE;
    else
        sqlca->sqlcode = ECPG_PGSQL;
 
    ecpg_log("raising sqlstate %.*s (sqlcode %ld): %s\n",
             (int) sizeof(sqlca->sqlstate), sqlca->sqlstate, sqlca->sqlcode, sqlca->sqlerrm.sqlerrmc);
 
    /* free all memory we have allocated for the user */
    ECPGfree_auto_mem();
}
 
/* filter out all error codes */
bool
ecpg_check_PQresult(PGresult *results, int lineno, PGconn *connection, enum COMPAT_MODE compat)
{
    if (results == NULL)
    {
        ecpg_log("ecpg_check_PQresult on line %d: no result - %s", lineno, PQerrorMessage(connection));
        ecpg_raise_backend(lineno, NULL, connection, compat);
        return false;
    }
 
    switch (PQresultStatus(results))
    {
 
        case PGRES_TUPLES_OK:
            return true;
            break;
        case PGRES_EMPTY_QUERY:
            /* do nothing */
            ecpg_raise(lineno, ECPG_EMPTY, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, NULL);
            PQclear(results);
            return false;
            break;
        case PGRES_COMMAND_OK:
            return true;
            break;
        case PGRES_NONFATAL_ERROR:
        case PGRES_FATAL_ERROR:
        case PGRES_BAD_RESPONSE:
            ecpg_log("ecpg_check_PQresult on line %d: bad response - %s", lineno, PQresultErrorMessage(results));
            ecpg_raise_backend(lineno, results, connection, compat);
            PQclear(results);
            return false;
            break;
        case PGRES_COPY_OUT:
            return true;
            break;
        case PGRES_COPY_IN:
            ecpg_log("ecpg_check_PQresult on line %d: COPY IN data transfer in progress\n", lineno);
            PQendcopy(connection);
            PQclear(results);
            return false;
            break;
        default:
            ecpg_log("ecpg_check_PQresult on line %d: unknown execution status type\n",
                     lineno);
            ecpg_raise_backend(lineno, results, connection, compat);
            PQclear(results);
            return false;
            break;
    }
}
 
/* print out an error message */
void
sqlprint(void)
{
    struct sqlca_t *sqlca = ECPGget_sqlca();
 
    if (sqlca == NULL)
    {
        ecpg_log("out of memory");
        return;
    }
 
    sqlca->sqlerrm.sqlerrmc[sqlca->sqlerrm.sqlerrml] = '\0';
    fprintf(stderr, ecpg_gettext("SQL error: %s\n"), sqlca->sqlerrm.sqlerrmc);
}