1if not modules then modules = { } end modules ['util-sql-tracers'] = {
2 version = 1.001,
3 comment = "companion to m-sql.mkiv",
4 author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
5 copyright = "PRAGMA ADE / ConTeXt Development Team",
6 license = "see context related readme files"
7}
8
9local sql = utilities.sql
10local tracers = { }
11sql.tracers = tracers
12
13sql.setmethod("library")
14
15local gsub, lower = string.gsub, string.lower
16
17local t_names = {
18 mysql = [[SHOW TABLES FROM `%database%`]],
19 mssql = [[SELECT table_name FROM %database%.information_schema.tables;]],
20 mssql = [[SELECT "name" FROM "%database%"."sys"."databases" ORDER BY "name";]],
21 mssql = [[SELECT name FROM "%database%"."sys"."objects" WHERE "type" IN ('P', 'U', 'V', 'TR', 'FN', 'TF');]],
22}
23
24local t_fields = {
25 mysql = [[SHOW FIELDS FROM `%database%`.`%table%` ]],
26 mssql = [[SELECT column_name "field", data_type "type", column_default "default", is_nullable "null" FROM %database%.information_schema.columns WHERE table_name='%table%']],
27}
28
29function sql.tracers.gettables(presets)
30 local servertype = sql.getserver()
31
32 local results, keys = sql.execute {
33 presets = presets,
34 template = t_names[servertype],
35 variables = {
36 database = presets.database,
37 },
38 }
39
40 local key = keys and keys[1]
41 local tables = { }
42
43 if keys then
44 for i=1,#results do
45 local name = results[i][key]
46 local results, keys = sql.execute {
47 presets = presets,
48 template = t_fields[servertype],
49 variables = {
50 database = presets.database,
51 table = name
52 },
53 }
54 if #results > 0 then
55 for i=1,#results do
56 local result = table.loweredkeys(results[i])
57
58 result.default = gsub(result.default,"^[%(']+(.-)[%)']+$","%1")
59 result.null = lower(result.null)
60
61 results[i] = result
62 end
63 tables[name] = results
64 else
65
66 end
67 end
68 end
69
70 return tables
71end
72 |
