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Commit 62e553c1 authored by msvensson@neptunus.(none)'s avatar msvensson@neptunus.(none)
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Merge neptunus.(none):/home/msvensson/mysql/my51-m-bug20942 

into  neptunus.(none):/home/msvensson/mysql/mysql-5.1-new-maint
parents 554b1f01 faf5beb6
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Showing with 84 additions and 173 deletions
sql/ha_federated.cc
View file @ 62e553c1
......@@ -364,6 +364,12 @@ static HASH federated_open_tables; // To track open tables
pthread_mutex_t federated_mutex; // To init the hash
static int federated_init= FALSE; // Checking the state of hash
/* Variables used when chopping off trailing characters */
static const uint sizeof_trailing_comma= sizeof(", ") - 1;
static const uint sizeof_trailing_closeparen= sizeof(") ") - 1;
static const uint sizeof_trailing_and= sizeof(" AND ") - 1;
static const uint sizeof_trailing_where= sizeof(" WHERE ") - 1;
/* Static declaration for handerton */
static handler *federated_create_handler(TABLE_SHARE *table,
MEM_ROOT *mem_root);
......@@ -526,19 +532,14 @@ static int check_foreign_data_source(FEDERATED_SHARE *share,
the query will be: SELECT * FROM `tablename` WHERE 1=0
*/
query.append(FEDERATED_SELECT);
query.append(FEDERATED_STAR);
query.append(FEDERATED_FROM);
query.append(FEDERATED_BTICK);
query.append(STRING_WITH_LEN("SELECT * FROM `"));
escaped_table_name_length=
escape_string_for_mysql(&my_charset_bin, (char*)escaped_table_name,
sizeof(escaped_table_name),
share->table_name,
share->table_name_length);
query.append(escaped_table_name, escaped_table_name_length);
query.append(FEDERATED_BTICK);
query.append(FEDERATED_WHERE);
query.append(FEDERATED_FALSE);
query.append(STRING_WITH_LEN("` WHERE 1=0"));
if (mysql_real_query(mysql, query.ptr(), query.length()))
{
......@@ -801,9 +802,9 @@ uint ha_federated::convert_row_to_internal_format(byte *record,
static bool emit_key_part_name(String *to, KEY_PART_INFO *part)
{
DBUG_ENTER("emit_key_part_name");
if (to->append(FEDERATED_BTICK) ||
if (to->append(STRING_WITH_LEN("`")) ||
to->append(part->field->field_name) ||
to->append(FEDERATED_BTICK))
to->append(STRING_WITH_LEN("`")))
DBUG_RETURN(1); // Out of memory
DBUG_RETURN(0);
}
......@@ -815,7 +816,7 @@ static bool emit_key_part_element(String *to, KEY_PART_INFO *part,
Field *field= part->field;
DBUG_ENTER("emit_key_part_element");
if (needs_quotes && to->append(FEDERATED_SQUOTE))
if (needs_quotes && to->append(STRING_WITH_LEN("'")))
DBUG_RETURN(1);
if (part->type == HA_KEYTYPE_BIT)
......@@ -862,10 +863,10 @@ static bool emit_key_part_element(String *to, KEY_PART_INFO *part,
DBUG_RETURN(1);
}
if (is_like && to->append(FEDERATED_PERCENT))
if (is_like && to->append(STRING_WITH_LEN("%")))
DBUG_RETURN(1);
if (needs_quotes && to->append(FEDERATED_SQUOTE))
if (needs_quotes && to->append(STRING_WITH_LEN("'")))
DBUG_RETURN(1);
DBUG_RETURN(0);
......@@ -1141,9 +1142,9 @@ bool ha_federated::create_where_from_key(String *to,
if (both_not_null)
{
if (i > 0)
tmp.append(FEDERATED_CONJUNCTION);
tmp.append(STRING_WITH_LEN(") AND ("));
else
tmp.append(FEDERATED_OPENPAREN);
tmp.append(STRING_WITH_LEN(" ("));
}
for (key_part= key_info->key_part,
......@@ -1164,13 +1165,13 @@ bool ha_federated::create_where_from_key(String *to,
if (*ptr++)
{
if (emit_key_part_name(&tmp, key_part) ||
tmp.append(FEDERATED_ISNULL))
tmp.append(STRING_WITH_LEN(" IS NULL ")))
goto err;
continue;
}
}
if (tmp.append(FEDERATED_OPENPAREN))
if (tmp.append(STRING_WITH_LEN(" (")))
goto err;
switch (ranges[i]->flag) {
......@@ -1186,12 +1187,12 @@ bool ha_federated::create_where_from_key(String *to,
if (records_in_range)
{
if (tmp.append(FEDERATED_GE))
if (tmp.append(STRING_WITH_LEN(" >= ")))
goto err;
}
else
{
if (tmp.append(FEDERATED_EQ))
if (tmp.append(STRING_WITH_LEN(" = ")))
goto err;
}
......@@ -1203,7 +1204,7 @@ bool ha_federated::create_where_from_key(String *to,
{
/* LIKE */
if (emit_key_part_name(&tmp, key_part) ||
tmp.append(FEDERATED_LIKE) ||
tmp.append(STRING_WITH_LEN(" LIKE ")) ||
emit_key_part_element(&tmp, key_part, needs_quotes, 1, ptr,
part_length))
goto err;
......@@ -1224,12 +1225,12 @@ bool ha_federated::create_where_from_key(String *to,
if (i > 0) /* end key */
{
if (tmp.append(FEDERATED_LE))
if (tmp.append(STRING_WITH_LEN(" <= ")))
goto err;
}
else /* start key */
{
if (tmp.append(FEDERATED_GT))
if (tmp.append(STRING_WITH_LEN(" > ")))
goto err;
}
......@@ -1243,7 +1244,7 @@ bool ha_federated::create_where_from_key(String *to,
case HA_READ_KEY_OR_NEXT:
DBUG_PRINT("info", ("federated HA_READ_KEY_OR_NEXT %d", i));
if (emit_key_part_name(&tmp, key_part) ||
tmp.append(FEDERATED_GE) ||
tmp.append(STRING_WITH_LEN(" >= ")) ||
emit_key_part_element(&tmp, key_part, needs_quotes, 0, ptr,
part_length))
goto err;
......@@ -1253,7 +1254,7 @@ bool ha_federated::create_where_from_key(String *to,
if (store_length >= length)
{
if (emit_key_part_name(&tmp, key_part) ||
tmp.append(FEDERATED_LT) ||
tmp.append(STRING_WITH_LEN(" < ")) ||
emit_key_part_element(&tmp, key_part, needs_quotes, 0, ptr,
part_length))
goto err;
......@@ -1262,7 +1263,7 @@ bool ha_federated::create_where_from_key(String *to,
case HA_READ_KEY_OR_PREV:
DBUG_PRINT("info", ("federated HA_READ_KEY_OR_PREV %d", i));
if (emit_key_part_name(&tmp, key_part) ||
tmp.append(FEDERATED_LE) ||
tmp.append(STRING_WITH_LEN(" <= ")) ||
emit_key_part_element(&tmp, key_part, needs_quotes, 0, ptr,
part_length))
goto err;
......@@ -1271,7 +1272,7 @@ bool ha_federated::create_where_from_key(String *to,
DBUG_PRINT("info",("cannot handle flag %d", ranges[i]->flag));
goto err;
}
if (tmp.append(FEDERATED_CLOSEPAREN))
if (tmp.append(STRING_WITH_LEN(") ")))
goto err;
next_loop:
......@@ -1281,7 +1282,7 @@ bool ha_federated::create_where_from_key(String *to,
DBUG_ASSERT(remainder > 1);
length-= store_length;
ptr+= store_length;
if (tmp.append(FEDERATED_AND))
if (tmp.append(STRING_WITH_LEN(" AND ")))
goto err;
DBUG_PRINT("info",
......@@ -1292,10 +1293,10 @@ bool ha_federated::create_where_from_key(String *to,
dbug_tmp_restore_column_map(table->write_set, old_map);
if (both_not_null)
if (tmp.append(FEDERATED_CLOSEPAREN))
if (tmp.append(STRING_WITH_LEN(") ")))
DBUG_RETURN(1);
if (to->append(FEDERATED_WHERE))
if (to->append(STRING_WITH_LEN(" WHERE ")))
DBUG_RETURN(1);
if (to->append(tmp))
......@@ -1339,17 +1340,17 @@ static FEDERATED_SHARE *get_share(const char *table_name, TABLE *table)
connect_string_length)))
{
query.set_charset(system_charset_info);
query.append(FEDERATED_SELECT);
query.append(STRING_WITH_LEN("SELECT "));
for (field= table->field; *field; field++)
{
query.append(FEDERATED_BTICK);
query.append(STRING_WITH_LEN("`"));
query.append((*field)->field_name);
query.append(FEDERATED_BTICK);
query.append(FEDERATED_COMMA);
query.append(STRING_WITH_LEN("`, "));
}
query.length(query.length()- FEDERATED_COMMA_LEN);
query.append(FEDERATED_FROM);
query.append(FEDERATED_BTICK);
/* chops off trailing comma */
query.length(query.length() - sizeof_trailing_comma);
query.append(STRING_WITH_LEN(" FROM `"));
if (!(share= (FEDERATED_SHARE *)
my_multi_malloc(MYF(MY_WME),
......@@ -1364,7 +1365,7 @@ static FEDERATED_SHARE *get_share(const char *table_name, TABLE *table)
share->table_name_length= strlen(share->table_name);
/* TODO: share->table_name to LEX_STRING object */
query.append(share->table_name, share->table_name_length);
query.append(FEDERATED_BTICK);
query.append(STRING_WITH_LEN("`"));
share->select_query= select_query;
strmov(share->select_query, query.ptr());
share->use_count= 0;
......@@ -1608,14 +1609,11 @@ int ha_federated::write_row(byte *buf)
/*
start both our field and field values strings
*/
insert_string.append(FEDERATED_INSERT);
insert_string.append(FEDERATED_BTICK);
insert_string.append(STRING_WITH_LEN("INSERT `"));
insert_string.append(share->table_name, share->table_name_length);
insert_string.append(FEDERATED_BTICK);
insert_string.append(FEDERATED_OPENPAREN);
insert_string.append(STRING_WITH_LEN("` ("));
values_string.append(FEDERATED_VALUES);
values_string.append(FEDERATED_OPENPAREN);
values_string.append(STRING_WITH_LEN(" VALUES ("));
/*
loop through the field pointer array, add any fields to both the values
......@@ -1636,7 +1634,7 @@ int ha_federated::write_row(byte *buf)
has_fields= TRUE;
if ((*field)->is_null())
insert_field_value_string.append(FEDERATED_NULL);
insert_field_value_string.append(STRING_WITH_LEN(" NULL "));
else
{
(*field)->val_str(&insert_field_value_string);
......@@ -1656,8 +1654,8 @@ int ha_federated::write_row(byte *buf)
make the following appends conditional as we don't know if the
next field is in the write set
*/
insert_string.append(FEDERATED_COMMA);
values_string.append(FEDERATED_COMMA);
insert_string.append(STRING_WITH_LEN(", "));
values_string.append(STRING_WITH_LEN(", "));
}
}
dbug_tmp_restore_column_map(table->read_set, old_map);
......@@ -1669,16 +1667,18 @@ int ha_federated::write_row(byte *buf)
*/
if (has_fields)
{
/* chops off leading commas */
insert_string.length(insert_string.length() - FEDERATED_COMMA_LEN);
values_string.length(values_string.length() - FEDERATED_COMMA_LEN);
insert_string.append(FEDERATED_CLOSEPAREN);
/* chops off trailing commas */
insert_string.length(insert_string.length() - sizeof_trailing_comma);
values_string.length(values_string.length() - sizeof_trailing_comma);
insert_string.append(STRING_WITH_LEN(") "));
}
else
insert_string.length(insert_string.length() - FEDERATED_CLOSEPAREN_LEN);
{
/* chops off trailing ) */
insert_string.length(insert_string.length() - sizeof_trailing_closeparen);
}
/* we always want to append this, even if there aren't any fields */
values_string.append(FEDERATED_CLOSEPAREN);
values_string.append(STRING_WITH_LEN(") "));
/* add the values */
insert_string.append(values_string);
......@@ -1726,10 +1726,9 @@ int ha_federated::optimize(THD* thd, HA_CHECK_OPT* check_opt)
query.length(0);
query.set_charset(system_charset_info);
query.append(FEDERATED_OPTIMIZE);
query.append(FEDERATED_BTICK);
query.append(STRING_WITH_LEN("OPTIMIZE TABLE `"));
query.append(share->table_name, share->table_name_length);
query.append(FEDERATED_BTICK);
query.append(STRING_WITH_LEN("`"));
if (mysql_real_query(mysql, query.ptr(), query.length()))
{
......@@ -1749,16 +1748,15 @@ int ha_federated::repair(THD* thd, HA_CHECK_OPT* check_opt)
query.length(0);
query.set_charset(system_charset_info);
query.append(FEDERATED_REPAIR);
query.append(FEDERATED_BTICK);
query.append(STRING_WITH_LEN("REPAIR TABLE `"));
query.append(share->table_name, share->table_name_length);
query.append(FEDERATED_BTICK);
query.append(STRING_WITH_LEN("`"));
if (check_opt->flags & T_QUICK)
query.append(FEDERATED_QUICK);
query.append(STRING_WITH_LEN(" QUICK"));
if (check_opt->flags & T_EXTEND)
query.append(FEDERATED_EXTENDED);
query.append(STRING_WITH_LEN(" EXTENDED"));
if (check_opt->sql_flags & TT_USEFRM)
query.append(FEDERATED_USE_FRM);
query.append(STRING_WITH_LEN(" USE_FRM"));
if (mysql_real_query(mysql, query.ptr(), query.length()))
{
......@@ -1827,11 +1825,9 @@ int ha_federated::update_row(const byte *old_data, byte *new_data)
update_string.length(0);
where_string.length(0);
update_string.append(FEDERATED_UPDATE);
update_string.append(FEDERATED_BTICK);
update_string.append(STRING_WITH_LEN("UPDATE `"));
update_string.append(share->table_name);
update_string.append(FEDERATED_BTICK);
update_string.append(FEDERATED_SET);
update_string.append(STRING_WITH_LEN("` SET "));
/*
In this loop, we want to match column names to values being inserted
......@@ -1851,7 +1847,7 @@ int ha_federated::update_row(const byte *old_data, byte *new_data)
update_string.append(FEDERATED_EQ);
if ((*field)->is_null())
update_string.append(FEDERATED_NULL);
update_string.append(STRING_WITH_LEN(" NULL "));
else
{
my_bitmap_map *old_map= tmp_use_all_columns(table, table->read_set);
......@@ -1862,33 +1858,34 @@ int ha_federated::update_row(const byte *old_data, byte *new_data)
field_value.length(0);
tmp_restore_column_map(table->read_set, old_map);
}
update_string.append(FEDERATED_COMMA);
update_string.append(STRING_WITH_LEN(", "));
}
if (bitmap_is_set(table->read_set, (*field)->field_index))
{
where_string.append((*field)->field_name);
if (field_in_record_is_null(table, *field, (char*) old_data))
where_string.append(FEDERATED_ISNULL);
where_string.append(STRING_WITH_LEN(" IS NULL "));
else
{
where_string.append(FEDERATED_EQ);
where_string.append(STRING_WITH_LEN(" = "));
(*field)->val_str(&field_value,
(char*) (old_data + (*field)->offset()));
(*field)->quote_data(&field_value);
where_string.append(field_value);
field_value.length(0);
}
where_string.append(FEDERATED_AND);
where_string.append(STRING_WITH_LEN(" AND "));
}
}
/* Remove last ', '. This works as there must be at least on updated field */
update_string.length(update_string.length() - FEDERATED_COMMA_LEN);
update_string.length(update_string.length() - sizeof_trailing_comma);
if (where_string.length())
{
where_string.length(where_string.length() - FEDERATED_AND_LEN);
update_string.append(FEDERATED_WHERE);
/* chop off trailing AND */
where_string.length(where_string.length() - sizeof_trailing_and);
update_string.append(STRING_WITH_LEN(" WHERE "));
update_string.append(where_string);
}
......@@ -1897,7 +1894,7 @@ int ha_federated::update_row(const byte *old_data, byte *new_data)
update multiple rows. We want to make sure to only update one!
*/
if (!has_a_primary_key)
update_string.append(FEDERATED_LIMIT1);
update_string.append(STRING_WITH_LEN(" LIMIT 1"));
if (mysql_real_query(mysql, update_string.ptr(), update_string.length()))
{
......@@ -1931,12 +1928,9 @@ int ha_federated::delete_row(const byte *buf)
DBUG_ENTER("ha_federated::delete_row");
delete_string.length(0);
delete_string.append(FEDERATED_DELETE);
delete_string.append(FEDERATED_FROM);
delete_string.append(FEDERATED_BTICK);
delete_string.append(STRING_WITH_LEN("DELETE FROM `"));
delete_string.append(share->table_name);
delete_string.append(FEDERATED_BTICK);
delete_string.append(FEDERATED_WHERE);
delete_string.append(STRING_WITH_LEN("` WHERE "));
for (Field **field= table->field; *field; field++)
{
......@@ -1948,26 +1942,25 @@ int ha_federated::delete_row(const byte *buf)
delete_string.append(cur_field->field_name);
if (cur_field->is_null())
{
delete_string.append(FEDERATED_IS);
delete_string.append(FEDERATED_NULL);
delete_string.append(STRING_WITH_LEN(" IS NULL "));
}
else
{
delete_string.append(FEDERATED_EQ);
delete_string.append(STRING_WITH_LEN(" = "));
cur_field->val_str(&data_string);
cur_field->quote_data(&data_string);
delete_string.append(data_string);
}
delete_string.append(FEDERATED_AND);
delete_string.append(STRING_WITH_LEN(" AND "));
}
}
// Remove trailing AND
delete_string.length(delete_string.length() - FEDERATED_AND_LEN);
// Remove trailing AND
delete_string.length(delete_string.length() - sizeof_trailing_and);
if (!found)
delete_string.length(delete_string.length() - FEDERATED_WHERE_LEN);
delete_string.length(delete_string.length() - sizeof_trailing_where);
delete_string.append(FEDERATED_LIMIT1);
delete_string.append(STRING_WITH_LEN(" LIMIT 1"));
DBUG_PRINT("info",
("Delete sql: %s", delete_string.c_ptr_quick()));
if (mysql_real_query(mysql, delete_string.ptr(), delete_string.length()))
......@@ -2463,15 +2456,13 @@ void ha_federated::info(uint flag)
if (flag & (HA_STATUS_VARIABLE | HA_STATUS_CONST))
{
status_query_string.length(0);
status_query_string.append(FEDERATED_INFO);
status_query_string.append(FEDERATED_SQUOTE);
status_query_string.append(STRING_WITH_LEN("SHOW TABLE STATUS LIKE '"));
escape_string_for_mysql(&my_charset_bin, (char *)escaped_table_name,
sizeof(escaped_table_name),
share->table_name,
share->table_name_length);
status_query_string.append(escaped_table_name);
status_query_string.append(FEDERATED_SQUOTE);
status_query_string.append(STRING_WITH_LEN("'"));
if (mysql_real_query(mysql, status_query_string.ptr(),
status_query_string.length()))
......@@ -2563,10 +2554,9 @@ int ha_federated::delete_all_rows()
query.length(0);
query.set_charset(system_charset_info);
query.append(FEDERATED_TRUNCATE);
query.append(FEDERATED_BTICK);
query.append(STRING_WITH_LEN("TRUNCATE `"));
query.append(share->table_name);
query.append(FEDERATED_BTICK);
query.append(STRING_WITH_LEN("`"));
/*
TRUNCATE won't return anything in mysql_affected_rows
......
sql/ha_federated.h
View file @ 62e553c1
......@@ -38,85 +38,6 @@
#define FEDERATED_QUERY_BUFFER_SIZE STRING_BUFFER_USUAL_SIZE * 5
#define FEDERATED_RECORDS_IN_RANGE 2
#define FEDERATED_INFO " SHOW TABLE STATUS LIKE "
#define FEDERATED_INFO_LEN (sizeof(FEDERATED_INFO) -1)
#define FEDERATED_SELECT "SELECT "
#define FEDERATED_SELECT_LEN (sizeof(FEDERATED_SELECT) -1)
#define FEDERATED_WHERE " WHERE "
#define FEDERATED_WHERE_LEN (sizeof(FEDERATED_WHERE) -1)
#define FEDERATED_FROM " FROM "
#define FEDERATED_FROM_LEN (sizeof(FEDERATED_FROM) -1)
#define FEDERATED_PERCENT "%"
#define FEDERATED_PERCENT_LEN (sizeof(FEDERATED_PERCENT) -1)
#define FEDERATED_IS " IS "
#define FEDERATED_IS_LEN (sizeof(FEDERATED_IS) -1)
#define FEDERATED_NULL " NULL "
#define FEDERATED_NULL_LEN (sizeof(FEDERATED_NULL) -1)
#define FEDERATED_ISNULL " IS NULL "
#define FEDERATED_ISNULL_LEN (sizeof(FEDERATED_ISNULL) -1)
#define FEDERATED_LIKE " LIKE "
#define FEDERATED_LIKE_LEN (sizeof(FEDERATED_LIKE) -1)
#define FEDERATED_TRUNCATE "TRUNCATE "
#define FEDERATED_TRUNCATE_LEN (sizeof(FEDERATED_TRUNCATE) -1)
#define FEDERATED_DELETE "DELETE "
#define FEDERATED_DELETE_LEN (sizeof(FEDERATED_DELETE) -1)
#define FEDERATED_INSERT "INSERT INTO "
#define FEDERATED_INSERT_LEN (sizeof(FEDERATED_INSERT) -1)
#define FEDERATED_OPTIMIZE "OPTIMIZE TABLE "
#define FEDERATED_OPTIMIZE_LEN (sizeof(FEDERATED_OPTIMIZE) -1)
#define FEDERATED_REPAIR "REPAIR TABLE "
#define FEDERATED_REPAIR_LEN (sizeof(FEDERATED_REPAIR) -1)
#define FEDERATED_QUICK " QUICK"
#define FEDERATED_QUICK_LEN (sizeof(FEDERATED_QUICK) -1)
#define FEDERATED_EXTENDED " EXTENDED"
#define FEDERATED_EXTENDED_LEN (sizeof(FEDERATED_EXTENDED) -1)
#define FEDERATED_USE_FRM " USE_FRM"
#define FEDERATED_USE_FRM_LEN (sizeof(FEDERATED_USE_FRM) -1)
#define FEDERATED_LIMIT1 " LIMIT 1"
#define FEDERATED_LIMIT1_LEN (sizeof(FEDERATED_LIMIT1) -1)
#define FEDERATED_VALUES "VALUES "
#define FEDERATED_VALUES_LEN (sizeof(FEDERATED_VALUES) -1)
#define FEDERATED_UPDATE "UPDATE "
#define FEDERATED_UPDATE_LEN (sizeof(FEDERATED_UPDATE) -1)
#define FEDERATED_SET " SET "
#define FEDERATED_SET_LEN (sizeof(FEDERATED_SET) -1)
#define FEDERATED_AND " AND "
#define FEDERATED_AND_LEN (sizeof(FEDERATED_AND) -1)
#define FEDERATED_CONJUNCTION ") AND ("
#define FEDERATED_CONJUNCTION_LEN (sizeof(FEDERATED_CONJUNCTION) -1)
#define FEDERATED_OR " OR "
#define FEDERATED_OR_LEN (sizeof(FEDERATED_OR) -1)
#define FEDERATED_NOT " NOT "
#define FEDERATED_NOT_LEN (sizeof(FEDERATED_NOT) -1)
#define FEDERATED_STAR "* "
#define FEDERATED_STAR_LEN (sizeof(FEDERATED_STAR) -1)
#define FEDERATED_SPACE " "
#define FEDERATED_SPACE_LEN (sizeof(FEDERATED_SPACE) -1)
#define FEDERATED_SQUOTE "'"
#define FEDERATED_SQUOTE_LEN (sizeof(FEDERATED_SQUOTE) -1)
#define FEDERATED_COMMA ", "
#define FEDERATED_COMMA_LEN (sizeof(FEDERATED_COMMA) -1)
#define FEDERATED_BTICK "`"
#define FEDERATED_BTICK_LEN (sizeof(FEDERATED_BTICK) -1)
#define FEDERATED_OPENPAREN " ("
#define FEDERATED_OPENPAREN_LEN (sizeof(FEDERATED_OPENPAREN) -1)
#define FEDERATED_CLOSEPAREN ") "
#define FEDERATED_CLOSEPAREN_LEN (sizeof(FEDERATED_CLOSEPAREN) -1)
#define FEDERATED_NE " != "
#define FEDERATED_NE_LEN (sizeof(FEDERATED_NE) -1)
#define FEDERATED_GT " > "
#define FEDERATED_GT_LEN (sizeof(FEDERATED_GT) -1)
#define FEDERATED_LT " < "
#define FEDERATED_LT_LEN (sizeof(FEDERATED_LT) -1)
#define FEDERATED_LE " <= "
#define FEDERATED_LE_LEN (sizeof(FEDERATED_LE) -1)
#define FEDERATED_GE " >= "
#define FEDERATED_GE_LEN (sizeof(FEDERATED_GE) -1)
#define FEDERATED_EQ " = "
#define FEDERATED_EQ_LEN (sizeof(FEDERATED_EQ) -1)
#define FEDERATED_FALSE " 1=0"
#define FEDERATED_FALSE_LEN (sizeof(FEDERATED_FALSE) -1)
/*
FEDERATED_SHARE is a structure that will be shared amoung all open handlers
The example implements the minimum of what you will probably need.
......
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