breaks_input.c File Reference

#include "c_common/vroom/breaks_input.h"

Include dependency graph for breaks_input.c:

Go to the source code of this file.

Functions
static void	db_get_breaks (char *breaks_sql, Vroom_break_t **breaks, size_t *total_breaks, Column_info_t *info, const int column_count, bool is_plain)
static void	fetch_breaks (HeapTuple *tuple, TupleDesc *tupdesc, Column_info_t *info, Vroom_break_t *vroom_break, bool is_plain)
void	get_vroom_breaks (char *sql, Vroom_break_t **rows, size_t *total_rows, bool is_plain)
	Reads the VROOM breaks. More...

Function Documentation

db_get_breaks()

static void db_get_breaks ( char *  breaks_sql, Vroom_break_t **  breaks, size_t *  total_breaks, Column_info_t *  info, const int  column_count, bool  is_plain  )

static

Definition at line 78 of file breaks_input.c.

                   {
#ifdef PROFILE
  clock_t start_t = clock();
  PGR_DBG("%s", breaks_sql);
#endif
 
  const int tuple_limit = 1000000;
 
  size_t total_tuples;
 
  void *SPIplan;
  SPIplan = pgr_SPI_prepare(breaks_sql);
  Portal SPIportal;
  SPIportal = pgr_SPI_cursor_open(SPIplan);
 
  bool moredata = true;
  (*total_breaks) = total_tuples = 0;
 
  /* on the first tuple get the column numbers */
 
  while (moredata == true) {
    SPI_cursor_fetch(SPIportal, true, tuple_limit);
    if (total_tuples == 0) {
      pgr_fetch_column_info(info, column_count);
    }
    size_t ntuples = SPI_processed;
    total_tuples += ntuples;
    if (ntuples > 0) {
      if ((*breaks) == NULL)
        (*breaks) = (Vroom_break_t *)palloc0(
            total_tuples * sizeof(Vroom_break_t));
      else
        (*breaks) = (Vroom_break_t *)repalloc(
            (*breaks),
            total_tuples * sizeof(Vroom_break_t));
 
      if ((*breaks) == NULL) {
        elog(ERROR, "Out of memory");
      }
 
      size_t t;
      SPITupleTable *tuptable = SPI_tuptable;
      TupleDesc tupdesc = SPI_tuptable->tupdesc;
      for (t = 0; t < ntuples; t++) {
        HeapTuple tuple = tuptable->vals[t];
        fetch_breaks(&tuple, &tupdesc, info,
            &(*breaks)[total_tuples - ntuples + t], is_plain);
      }
      SPI_freetuptable(tuptable);
    } else {
      moredata = false;
    }
  }
 
  SPI_cursor_close(SPIportal);
 
  if (total_tuples == 0) {
    (*total_breaks) = 0;
    return;
  }
 
  (*total_breaks) = total_tuples;
#ifdef PROFILE
  time_msg("reading breaks", start_t, clock());
#endif
}

References fetch_breaks(), PGR_DBG, pgr_fetch_column_info(), pgr_SPI_cursor_open(), pgr_SPI_prepare(), and time_msg().

Referenced by get_vroom_breaks().

fetch_breaks()

static void fetch_breaks ( HeapTuple *  tuple, TupleDesc *  tupdesc, Column_info_t *  info, Vroom_break_t *  vroom_break, bool  is_plain  )

static

Definition at line 57 of file breaks_input.c.

                   {
  vroom_break->id = get_Idx(tuple, tupdesc, info[0], 0);
  vroom_break->vehicle_id = get_Idx(tuple, tupdesc, info[1], 0);
  if (is_plain) {
    vroom_break->service = get_Duration(tuple, tupdesc, info[2], 0);
  } else {
    vroom_break->service =
        (Duration)get_PositiveTInterval(tuple, tupdesc, info[2], 0);
  }
  vroom_break->data = column_found(info[3].colNumber)
                          ? spi_getText(tuple, tupdesc, info[3])
                          : strdup("{}");
}

References column_found(), Vroom_break_t::data, get_Duration(), get_Idx(), get_PositiveTInterval(), Vroom_break_t::id, Vroom_break_t::service, spi_getText(), and Vroom_break_t::vehicle_id.

Referenced by db_get_breaks().

get_vroom_breaks()

void get_vroom_breaks	(	char *	sql,
		Vroom_break_t **	rows,
		size_t *	total_rows,
		bool	is_plain
	)

Reads the VROOM breaks.

Parameters

[in]	sql	SQL query to execute
[out]	rows	C Container that holds the data
[out]	total_rows	Total rows recieved

Definition at line 160 of file breaks_input.c.

                   {
  int kColumnCount = 4;
  Column_info_t info[kColumnCount];
 
  for (int i = 0; i < kColumnCount; ++i) {
    info[i].colNumber = -1;
    info[i].type = 0;
    info[i].strict = true;
    info[i].eType = ANY_INTEGER;
  }
 
  info[0].name = "id";
  info[1].name = "vehicle_id";
  info[2].name = "service";
  info[3].name = "data";
 
  info[2].eType = INTEGER;  // service
  info[3].eType = JSONB;    // data
 
  if (!is_plain) {
    info[2].eType = INTERVAL;  // service
  }
 
  /* service and data are not mandatory */
  info[2].strict = false;
  info[3].strict = false;
 
  db_get_breaks(sql, rows, total_rows, info, kColumnCount, is_plain);
}

References ANY_INTEGER, Column_info_t::colNumber, db_get_breaks(), Column_info_t::eType, INTEGER, INTERVAL, JSONB, Column_info_t::name, Column_info_t::strict, and Column_info_t::type.

Referenced by process().