alter_table.anubis
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*Project* Anubis
*Title* SQLite Alter table function
*Copyright* Copyright (c) Cédric Ricard 2007.
*Author* Cédric Ricard
*Created* 2007 02 17
*Satus* Released
*Compatibility* 1.7.10
read tools/basis.anubis
read data_base/db_tools.anubis
read data_base/alter_table.anubis
read system/logger.anubis
read system/string.anubis
public define Maybe(One)
alter_table
(
Database db,
String tableName,
String newTableQuery,
Logger log
).
--- That's all for the public part ! --------------------------------------------------
define String
to_String
(
DbEntityType type
) =
if type is
{
table then "table",
view then "view",
index then "index",
trigger then "trigger"
}.
define One
print_list
(
List(String) l
) =
if l is
{
[] then print(" <<<\n"),
[h . t] then print(h + ", "); print_list(t)
}.
define Maybe(One)
my_sql_query
(
Database db,
String sql,
(LogLevel, String) -> One log
) =
if sql_query(db, sql) is
{
error(sql_error) then log(logError, "SQL ERROR: " + sql_error.text + "\n ...executing query [" + sql + "]"); failure,
ok(_,_,_) then success(unique)
}.
define Maybe(String)
get_original_query
(
Database db,
String dbName, // alias for attached database, 'main' for main database.
DbEntityType object_type,
String tableName,
(LogLevel, String) -> One log
) =
if sql_query(db, "SELECT sql FROM " + dbName + ".sqlite_master where (type='"+to_String(object_type)+"') and tbl_name='" + tableName + "'") is
{
error(sql_error) then log(logError, "alter_table/get_original_query ERROR '" + sql_error.text + "'"); failure,
ok(_,table_cursor,_) then
if table_cursor(unique) is
{
error(sql_error) then log(logError, "alter_table/get_original_query ERROR '" + sql_error.text + "'"); failure,
no_more_row then failure, //can't find the table in sqlite_master, because the table is new
row(current) then success(text(current)(0))
}
}.
define Bool
has_rows
(
Database db,
String tableName,
(LogLevel, String) -> One log
) =
if sql_query(db, "SELECT count(*) FROM " + tableName) is
{
error(sql_error) then log(logError, "has_rows query ERROR '" + sql_error.text + "'"); false,
ok(_,table_cursor,_) then
if table_cursor(unique) is
{
error(sql_error) then log(logError, "has_row run ERROR '" + sql_error.text + "'"); false,
no_more_row then false,
row(current) then db_integer(current)(0) /= 0
}
}.
define List(String)
alter_table_extract_columns_list_sub
(
Int -> SQLite3Datum row,
Int colIndex
) =
if row(colIndex) is text(name) then [name . alter_table_extract_columns_list_sub(row, colIndex+1)]
else [].
define List(String)
alter_table_extract_columns_list
(
SQLite3HeadersOrRow -> SQLite3Row table_cursor,
(LogLevel, String) -> One log
) =
if table_cursor(headers) is
{
error(sql_error) then log(logError, "alter_table_extract_columns_list ERROR '" + sql_error.text + "'"); [],
no_more_row then [],
row(headers) then alter_table_extract_columns_list_sub(headers, 0)
}.
define String
alter_table_extract_column_string
(
One -> DbRow table_cursor,
List(String) oldColumns,
(LogLevel, String) -> One log
) =
if table_cursor(unique) is
{
error(sql_error) then log(logError, "alter_table_extract_columns_list ERROR '" + sql_error.text + "'"); "",
no_more_row then /*logDebug(log, "Extract columns answers 'no more row'");*/ "",
row(row) then
if row(1) is db_text(name) then
with test = (String name2) |-> log(logDebug, "name: " + name + " / name2: " + name2); if name = name2 then true else false,
colString = alter_table_extract_column_string(table_cursor, oldColumns, log),
if find_element(oldColumns, test) is
{
failure then colString,
success(_) then log(logDebug, "found: " + name);
if is_empty(colString) then name else name + ", " + colString
}
else ""
}.
// false = different, true = same
define Bool
compare_creation_queries
(
String tableName,
String query1,
String query2,
) =
if find(tableName, query1, 0) is
{
failure then false,
success(p1) then
if find(tableName, query2, 0) is
{
failure then false,
success(p2) then
if sub_string(query1, p1, length(query1) - p1) is
{
failure then false,
success(s1) then
if sub_string(query2, p2, length(query2) - p2) is
{
failure then false,
success(s2) then s1 = s2
}
}
}
}.
public define Maybe(One)
alter_table
(
Database db,
String dbName, // alias for attached database, 'main' for main database.
String tableName,
String newTableQuery,
(LogLevel, String) -> One log
) =
with fullTableName = dbName + "." + tableName,
if get_original_query(db, dbName, table, tableName, log) is
{
failure then
log(logInfo, "Creating table '" + fullTableName + "'... ");
if sql_query(db, newTableQuery) is error(sql_error)
then log(logError, "ERROR : " + sql_error.text); failure
else log(logInfo, " --> ok."); success(unique),
success(originalTableQuery) then
if compare_creation_queries(tableName, originalTableQuery, newTableQuery) = false then
log(logInfo, "Updating table '" + fullTableName + "' on database... ");
log(logDebug, originalTableQuery);
log(logDebug, newTableQuery);
if has_rows(db, fullTableName, log) is
{
false then
if my_sql_query(db, "DROP TABLE " + fullTableName, log) is failure
then failure
else if my_sql_query(db, newTableQuery, log ) is
{
failure then failure,
success(_) then log(logInfo, " --> ok."); success(unique)
},
true then
with tempNameTable = tableName + "_temp",
forget(sql_query(db, "PRAGMA foreign_keys = 0;"));
forget(sql_query(db, "DROP TABLE " + tempNameTable));
with result = if my_sql_query(db, "CREATE TEMP TABLE " + tempNameTable + " AS SELECT * from " + fullTableName, log) is failure then failure else
if my_sql_query(db, "DROP TABLE " + fullTableName, log) is failure then failure else
if my_sql_query(db, newTableQuery , log) is failure then failure else
if sql_query(db, "SELECT * FROM " + tempNameTable) is
{
error(sql_error) then log(logError, "alter_table: select * tempTable ERROR '" + sql_error.text + "'"); failure,
ok(get_cols,table_cursor2,_) then
with oldColumns = get_cols(unique),
//print_list(oldColumns);
if sql_query(db, "PRAGMA " + dbName + ".table_info(" + tableName + ")") is
{
error(sql_error) then log(logError, "alter_table: pragma table_info() ERROR '" + sql_error.text + "'"); failure,
ok(_,table_cursor3,_) then
with newColumnsStr = alter_table_extract_column_string(table_cursor3, oldColumns, log),
sql = "INSERT INTO " + fullTableName + " (" + newColumnsStr + ") SELECT " + newColumnsStr + " FROM " + tempNameTable,
if sql_query(db, sql) is
{
error(sql_error) then log(logError, "alter_table ERROR '" + sql_error.text + "'\n\tquery = [" + sql + "]"); failure,
ok(_,_,_) then log(logInfo, " --> ok."); success(unique)
}
}
},
forget(sql_query(db, "PRAGMA foreign_keys = 1;"));
result
}
else
success(unique)
}.
public define Maybe(One)
alter_table
(
Database db,
String tableName,
String newTableQuery,
(LogLevel, String) -> One log
) =
alter_table(db, "main", tableName, newTableQuery, log).
public define Maybe(One)
alter_view
(
Database db,
String dbName, // alias for attached database, 'main' for main database.
String viewName,
String newViewQuery,
(LogLevel, String) -> One log
) =
with fullViewName = dbName + "." + viewName,
if get_original_query(db, dbName, view, viewName, log) is
{
failure then
log(logInfo, "Creating view '" + fullViewName + "'... ");
if sql_query(db, newViewQuery) is error(sql_error)
then log(logError, "ERROR : " + sql_error.text); failure
else log(logInfo, " --> ok."); success(unique),
success(originalViewQuery) then
if compare_creation_queries(viewName, originalViewQuery, newViewQuery) = false then
log(logInfo, "Updating view '" + fullViewName + "' on database... ");
log(logDebug, originalViewQuery);
log(logDebug, newViewQuery);
if my_sql_query(db, "DROP VIEW " + fullViewName, log) is failure
then failure
else if my_sql_query(db, newViewQuery, log ) is
{
failure then failure,
success(_) then log(logInfo, " --> ok."); success(unique)
}
else
success(unique)
}.
public define Maybe(One)
alter_view
(
Database db,
String viewName,
String newViewQuery,
(LogLevel, String) -> One log
) =
alter_view(db, "main", viewName, newViewQuery, log).