Table Template meets ODBC scheme

try-odbc-only.red

Red [
	Author: ["Toomas Vooglaid" "Christian Ensel"]
	Needs:  'View
]

#include %table-template.red

port?: func [value [any-type!]] [port! = type? :value]  ;-- missing helper

context [
	≣sources: ≣catalogs: ≣schemas: ▤tables: ▢sql: ⨀tables: ⊞content: none     ;-- forgive me :^)

	source: infos: catalog: schema: table: none
	connection: statement: tables: none

	sources: extract system/schemes/odbc/state/sources 2
	
	update-⊞content: function [/row-count rows] [
		either row-count [
			records: compose/deep [["Result"] [(rejoin ["Operation affected " rows " row" pick ["s" ""] rows > 1])]]
		][
			insert/only records: copy change statement [flat?: no]
						headers: extract/index statement/state/columns 10 2
		]
		⊞content/data:
		⊞content/actors/data: records
		⊞content/actors/use-state/with ⊞content [frozen-rows: [1]]
	]
	update-≣catalogs: does [≣catalogs/data: unique extract/index tables 5 1 ≣catalogs/selected: 1]
	update-≣schemas:  does [ ≣schemas/data: unique extract/index tables 5 2  ≣schemas/selected: 1]
	update-≣tables:   does [  ▤tables/data: unique extract/index tables 5 3   ▤tables/selected: 1]
	
	view [
		title "RedSQL"
		on-close [all [port? connection  open? connection  close connection]]
		panel [
			origin 0x0 across 

			text 45 "Source" ≣sources: drop-down 95 data sources on-change [
				source: pick face/data face/selected
				attempt [close connection]
				catalog: schema: table: none
				statement: open connection: open rejoin [odbc:// source]
				infos: query connection
				insert change statement [flat?: yes] [tables none none none "TABLE"]
				tables: copy statement
				update-≣catalogs
				do-actor ≣catalogs none 'change 
			] return

			text 45 "Catalog:" ≣catalogs: drop-down 95 on-change [
				catalog: pick face/data face/selected
				close statement							;-- changing catalog doesn't work with Text Driver while having an open statemenet
				change connection compose [catalog: (catalog)]
				statement: open connection
				insert change statement [flat?: yes] compose [tables (catalog) none none "TABLE"]
				tables: copy statement
				update-≣schemas
				do-actor ≣schemas none 'change 
			] return

			text 45 "Schema:" ≣schemas: drop-down 95 on-change [
				schema: pick face/data face/selected
				attempt [insert        statement              rejoin  ["SET search_path TO " schema]]  ;-- postgres
				         insert change statement [flat?: yes] compose [tables (catalog) (schema) none "TABLE"]
				tables: copy statement
				update-≣tables
				do-actor ▤tables none 'change
			] return
		] 
		▢sql: area 490x90 wrap
		panel [
			origin 1x0 below
			button "Execute" 99 [/local [result]
				unless all [port? statement open? statement] [exit]
				either number? result: insert statement copy ▢sql/text [		;-- needs COPY to trigger preparation
					update-⊞content/row-count result
				][
					update-⊞content
				]
			]
			⨀tables: radio 99 "Tables" data on on-change [do-actor ▤tables none 'change]
			radio 99 "Columns"
		]
		return 

		▤tables: text-list 150x400 data [] on-change [/local [limit quote]
			table: pick face/data face/selected
			unless all [port? statement open? statement] [exit]
			either ⨀tables/data [
				quote: switch/default infos/"dbms-name" ["TEXT" "MariaDB" [#"`"]] [{"}]
				insert statement rejoin [{SELECT * FROM } quote table quote]
				update-⊞content
			][
				limit: statement/state/window           ;-- hack to make SQLColumns work with MariaDB
				statement/state/window: 1               ;
				insert statement compose [columns (catalog) (schema) (table)] off
				update-⊞content
				statement/state/window: limit
			]
		]

		⊞content: table 617x417
	]
]

infos/"dbms-name" aware table identifier quoting