fix: resolve MariaDB collation error by switching from mysql-connector to PyMySQL
- Replace mysql-connector-python with PyMySQL driver for better MariaDB compatibility - PyMySQL handles utf8mb4_0900_ai_ci collation properly without errors - Update Dockerfile.sql-executor to install PyMySQL and psycopg2-binary - Refactor sql-query-executor.py to use PyMySQL API (pymysql.connect, DictCursor) - Verified sql-executor service with SELECT, INSERT, UPDATE operations on Freescout DB - Add n8n workflow definitions: workflow-a-http.json and workflow-b-http.json * Workflow A: Polls unprocessed conversations, analyzes with LiteLLM, saves suggestions * Workflow B: Polls approved suggestions, executes Baramundi jobs or email replies - Update compose.yaml with sql-executor service configuration and dependencies All SQL operations now execute successfully against MariaDB 11.3.2
This commit is contained in:
Claude Code
337
n8n-workflows/workflow-b-http.json
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337
n8n-workflows/workflow-b-http.json
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{
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"name": "Workflow B - Approval & Execution (HTTP)",
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"description": "Poll for approved AI suggestions and execute them (Baramundi jobs or email replies)",
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"nodes": [
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{
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"id": "uuid-trigger-b",
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"name": "Trigger",
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"type": "n8n-nodes-base.cron",
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"typeVersion": 1,
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"position": [250, 200],
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"parameters": {
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"cronExpression": "*/2 * * * *"
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}
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},
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{
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"id": "uuid-get-approved",
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"name": "Get Approved Conversations",
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"type": "n8n-nodes-base.httpRequest",
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"typeVersion": 4,
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"position": [450, 200],
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"parameters": {
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"url": "http://host.docker.internal:4000/query/freescout",
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"method": "POST",
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"headers": {
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"Content-Type": "application/json"
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},
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"sendBody": true,
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"specifyBody": "json",
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"jsonBody": "{\"query\":\"SELECT c.id, c.number, c.subject, c.customer_email, ccf.value as ai_suggestion FROM conversations c JOIN conversation_custom_field ccf ON c.id = ccf.conversation_id WHERE ccf.custom_field_id = 7 AND ccf.value = 'APPROVED' LIMIT 10\"}"
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}
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},
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{
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"id": "uuid-split-approved",
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"name": "Split Results",
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"type": "n8n-nodes-base.splitInBatches",
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"typeVersion": 3,
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"position": [650, 200],
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"parameters": {
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"batchSize": 1,
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"options": {}
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}
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},
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{
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"id": "uuid-extract-approved",
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"name": "Extract & Parse Suggestion",
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"type": "n8n-nodes-base.set",
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"typeVersion": 3,
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"position": [850, 200],
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"parameters": {
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"options": {},
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"assignments": {
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"assignments": [
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{
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"name": "ticket_id",
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"value": "={{ $json.id }}",
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"type": "number"
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},
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{
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"name": "ticket_number",
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"value": "={{ $json.number }}",
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"type": "number"
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},
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{
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"name": "subject",
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"value": "={{ $json.subject }}",
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"type": "string"
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},
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{
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"name": "customer_email",
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"value": "={{ $json.customer_email }}",
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"type": "string"
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},
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{
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"name": "ai_suggestion_raw",
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"value": "={{ typeof $json.ai_suggestion === 'string' ? $json.ai_suggestion : JSON.stringify($json.ai_suggestion) }}",
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"type": "string"
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},
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{
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"name": "ai_suggestion",
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"value": "={{ typeof $json.ai_suggestion === 'string' ? JSON.parse($json.ai_suggestion) : $json.ai_suggestion }}",
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"type": "object"
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},
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{
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"name": "solution_type",
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"value": "={{ $json.ai_suggestion.lösung_typ || 'UNKNOWN' }}",
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"type": "string"
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}
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]
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}
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}
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},
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{
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"id": "uuid-decide-solution",
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"name": "Decide Solution Type",
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"type": "n8n-nodes-base.switch",
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"typeVersion": 1,
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"position": [1050, 200],
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"parameters": {
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"options": [
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{
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"condition": "equal",
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"value1": "={{ $json.solution_type }}",
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"value2": "BARAMUNDI_JOB"
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},
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{
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"condition": "equal",
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"value1": "={{ $json.solution_type }}",
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"value2": "AUTOMATISCHE_ANTWORT"
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}
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]
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}
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},
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{
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"id": "uuid-execute-baramundi",
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"name": "Execute Baramundi Job",
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"type": "n8n-nodes-base.httpRequest",
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"typeVersion": 4,
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"position": [1250, 50],
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"parameters": {
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"url": "https://baramundi-api.example.com/api/jobs",
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"method": "POST",
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"headers": {
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"Content-Type": "application/json",
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"Authorization": "Bearer YOUR_BARAMUNDI_TOKEN"
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},
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"sendBody": true,
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"specifyBody": "json",
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"jsonBody": "{\"job_name\":\"{{$json.ai_suggestion.baramundi_job}}\",\"ticket_id\":{{$json.ticket_id}},\"target_system\":\"IT\",\"description\":\"{{$json.subject}}\"}"
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}
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},
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{
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"id": "uuid-send-email",
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"name": "Send Email Reply",
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"type": "n8n-nodes-base.httpRequest",
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"typeVersion": 4,
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"position": [1250, 150],
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"parameters": {
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"url": "http://host.docker.internal:4000/query/freescout",
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"method": "POST",
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"headers": {
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"Content-Type": "application/json"
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},
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"sendBody": true,
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"specifyBody": "json",
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"jsonBody": "{\"query\":\"INSERT INTO threads (conversation_id, customer_id, user_id, type, status, body, created_at, updated_at) VALUES ({{$json.ticket_id}}, (SELECT customer_id FROM conversations WHERE id = {{$json.ticket_id}} LIMIT 1), NULL, 'customer', 'active', '{{$json.ai_suggestion.antwort_text | replace(\\\"'\\\", \\\"''\\\")}}', NOW(), NOW())\"}"
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}
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},
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{
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"id": "uuid-mark-escalation",
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"name": "Mark for Manual Review",
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"type": "n8n-nodes-base.set",
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"typeVersion": 3,
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"position": [1250, 270],
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"parameters": {
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"options": {},
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"assignments": {
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"assignments": [
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{
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"name": "action",
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"value": "Manual escalation required",
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"type": "string"
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}
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]
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}
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}
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},
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{
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"id": "uuid-update-status",
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"name": "Update Status to EXECUTED",
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"type": "n8n-nodes-base.httpRequest",
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"typeVersion": 4,
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"position": [1450, 200],
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"parameters": {
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"url": "http://host.docker.internal:4000/query/freescout",
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"method": "POST",
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"headers": {
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"Content-Type": "application/json"
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},
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"sendBody": true,
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"specifyBody": "json",
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"jsonBody": "{\"query\":\"UPDATE conversation_custom_field SET value = 'EXECUTED' WHERE conversation_id = {{$json.ticket_id}} AND custom_field_id = 7\"}"
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}
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},
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{
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"id": "uuid-trigger-workflow-c",
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"name": "Trigger Workflow C (KB Update)",
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"type": "n8n-nodes-base.httpRequest",
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"typeVersion": 4,
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"position": [1650, 200],
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"parameters": {
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"url": "https://n8n.fft-it.de/webhook/workflow-c",
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"method": "POST",
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"headers": {
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"Content-Type": "application/json"
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},
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"sendBody": true,
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"specifyBody": "json",
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"jsonBody": "{\"ticket_id\":{{$json.ticket_id}},\"subject\":\"{{$json.subject}}\",\"problem\":\"{{$json.subject}}\",\"solution\":\"{{$json.ai_suggestion.antwort_text}}\",\"category\":\"{{$json.ai_suggestion.kategorie}}\",\"solution_type\":\"{{$json.solution_type}}\"}"
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}
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},
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{
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"id": "uuid-log-audit",
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"name": "Log to PostgreSQL",
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"type": "n8n-nodes-base.httpRequest",
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"typeVersion": 4,
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"position": [1850, 200],
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"parameters": {
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"url": "http://host.docker.internal:4000/query/audit",
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"method": "POST",
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"headers": {
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"Content-Type": "application/json"
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},
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"sendBody": true,
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"specifyBody": "json",
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"jsonBody": "{\"query\":\"INSERT INTO workflow_executions (workflow_name, ticket_id, status, execution_time_ms, created_at) VALUES ('Workflow B - Approval Execution', {{$json.ticket_id}}, 'SUCCESS', 0, NOW())\"}"
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}
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}
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],
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"connections": {
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"Trigger": {
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"main": [
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[
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{
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"node": "Get Approved Conversations",
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"index": 0
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}
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]
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]
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},
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"Get Approved Conversations": {
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"main": [
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[
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{
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"node": "Split Results",
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"index": 0
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}
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]
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]
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},
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"Split Results": {
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"main": [
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[
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{
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"node": "Extract & Parse Suggestion",
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"index": 0
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}
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]
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]
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},
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"Extract & Parse Suggestion": {
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"main": [
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[
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{
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"node": "Decide Solution Type",
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"index": 0
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}
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]
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]
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},
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"Decide Solution Type": {
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"main": [
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[
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{
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"node": "Execute Baramundi Job",
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"index": 0
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}
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],
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[
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{
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"node": "Send Email Reply",
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"index": 0
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}
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],
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[
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{
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"node": "Mark for Manual Review",
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"index": 0
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}
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]
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]
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},
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"Execute Baramundi Job": {
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"main": [
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[
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{
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"node": "Update Status to EXECUTED",
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"index": 0
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}
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]
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]
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},
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"Send Email Reply": {
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"main": [
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[
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{
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"node": "Update Status to EXECUTED",
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"index": 0
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}
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]
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]
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},
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"Mark for Manual Review": {
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"main": [
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[
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{
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"node": "Update Status to EXECUTED",
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"index": 0
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}
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]
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]
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},
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"Update Status to EXECUTED": {
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"main": [
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[
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{
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"node": "Trigger Workflow C (KB Update)",
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"index": 0
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}
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]
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]
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},
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"Trigger Workflow C (KB Update)": {
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"main": [
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[
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{
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"node": "Log to PostgreSQL",
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"index": 0
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}
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]
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]
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}
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},
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"active": false,
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"settings": {
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"errorHandler": "continueOnError"
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}
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}
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