C++ (Cpp) __find_column_format Examples

Example #1

File: schema_plan.c Project: qixin/wiredtiger

/*
 * __wt_struct_reformat --
 *	Given a table and a list of columns (which could be values in a column
 *	group or index keys), calculate the resulting new format string.
 *	The result will be appended to the format buffer.
 */
int
__wt_struct_reformat(WT_SESSION_IMPL *session, WT_TABLE *table,
    const char *columns, size_t len, const char *extra_cols, int value_only,
    WT_ITEM *format)
{
	WT_CONFIG config;
	WT_CONFIG_ITEM k, next_k, next_v;
	WT_DECL_RET;
	WT_PACK_VALUE pv;
	int have_next;

	WT_CLEAR(pv);		/* -Wuninitialized */

	WT_RET(__wt_config_initn(session, &config, columns, len));
	WT_RET(__wt_config_next(&config, &next_k, &next_v));
	do {
		k = next_k;
		ret = __wt_config_next(&config, &next_k, &next_v);
		if (ret != 0 && ret != WT_NOTFOUND)
			return (ret);
		have_next = (ret == 0);

		if (!have_next && extra_cols != NULL) {
			WT_RET(__wt_config_init(session, &config, extra_cols));
			WT_RET(__wt_config_next(&config, &next_k, &next_v));
			have_next = 1;
			extra_cols = NULL;
		}

		if ((ret = __find_column_format(session,
		    table, &k, value_only, &pv)) != 0) {
			if (value_only && ret == EINVAL)
				WT_RET_MSG(session, EINVAL,
				    "A column group cannot store key column "
				    "'%.*s' in its value", (int)k.len, k.str);
			WT_RET_MSG(session, EINVAL,
			    "Column '%.*s' not found", (int)k.len, k.str);
		}

		/*
		 * Check whether we're moving an unsized WT_ITEM from the end
		 * to the middle, or vice-versa.  This determines whether the
		 * size needs to be prepended.  This is the only case where the
		 * destination size can be larger than the source size.
		 */
		if (pv.type == 'u' && !pv.havesize && have_next)
			pv.type = 'U';
		else if (pv.type == 'U' && !have_next)
			pv.type = 'u';

		if (pv.havesize)
			WT_RET(__wt_buf_catfmt(
			    session, format, "%d%c", (int)pv.size, pv.type));
		else
			WT_RET(__wt_buf_catfmt(session, format, "%c", pv.type));
	} while (have_next);

	return (0);
}

Example #2

File: schema_plan.c Project: ajdavis/mongo

/*
 * __wt_struct_reformat --
 *	Given a table and a list of columns (which could be values in a column
 *	group or index keys), calculate the resulting new format string.
 *	The result will be appended to the format buffer.
 */
int
__wt_struct_reformat(WT_SESSION_IMPL *session, WT_TABLE *table,
    const char *columns, size_t len, const char *extra_cols, bool value_only,
    WT_ITEM *format)
{
	WT_CONFIG config;
	WT_CONFIG_ITEM k, next_k, next_v;
	WT_DECL_PACK_VALUE(pv);
	WT_DECL_RET;
	bool have_next;

	__wt_config_initn(session, &config, columns, len);
	/*
	 * If an empty column list is specified, this will fail with
	 * WT_NOTFOUND, that's okay.
	 */
	WT_RET_NOTFOUND_OK(ret = __wt_config_next(&config, &next_k, &next_v));
	if (ret == WT_NOTFOUND) {
		if (extra_cols != NULL) {
			__wt_config_init(session, &config, extra_cols);
			WT_RET(__wt_config_next(&config, &next_k, &next_v));
			extra_cols = NULL;
		} else if (format->size == 0) {
			WT_RET(__wt_buf_set(session, format, "", 1));
			return (0);
		}
	}
	do {
		k = next_k;
		ret = __wt_config_next(&config, &next_k, &next_v);
		if (ret != 0 && ret != WT_NOTFOUND)
			return (ret);
		have_next = ret == 0;

		if (!have_next && extra_cols != NULL) {
			__wt_config_init(session, &config, extra_cols);
			WT_RET(__wt_config_next(&config, &next_k, &next_v));
			have_next = true;
			extra_cols = NULL;
		}

		if ((ret = __find_column_format(session,
		    table, &k, value_only, &pv)) != 0) {
			if (value_only && ret == EINVAL)
				WT_RET_MSG(session, EINVAL,
				    "A column group cannot store key column "
				    "'%.*s' in its value", (int)k.len, k.str);
			WT_RET_MSG(session, EINVAL,
			    "Column '%.*s' not found", (int)k.len, k.str);
		}

		/*
		 * Check whether we're moving an unsized WT_ITEM from the end
		 * to the middle, or vice-versa.  This determines whether the
		 * size needs to be prepended.  This is the only case where the
		 * destination size can be larger than the source size.
		 */
		if (pv.type == 'u' && !pv.havesize && have_next)
			pv.type = 'U';
		else if (pv.type == 'U' && !have_next)
			pv.type = 'u';

		if (pv.havesize)
			WT_RET(__wt_buf_catfmt(session,
			    format, "%" PRIu32 "%c", pv.size, pv.type));
		else
			WT_RET(__wt_buf_catfmt(session, format, "%c", pv.type));
	} while (have_next);

	return (0);
}