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_archive/osis/templates/create_table copy.lua

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+CREATE OR REPLACE FUNCTION create_table_from_json(definition JSONB, reset BOOLEAN DEFAULT FALSE)
+RETURNS VOID AS $$
+    local json = require("cjson")
+    local def = json.decode(definition)
+    local table_name = def.table_name
+    local table_fields = def.table_fields
+    local fts_fields = def.fts_fields or {}
+
+    local columns = ""
+    for key, value in pairs(table_fields) do
+        columns = columns .. key .. " " .. value .. ", "
+    end
+
+    -- Add the necessary columns
+    columns = columns .. "id TEXT PRIMARY KEY, "
+    columns = columns .. "name TEXT NOT NULL, "
+    columns = columns .. "creation_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP, "
+    columns = columns .. "mod_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP, "
+    columns = columns .. "data JSON"
+
+    -- Construct the CREATE TABLE statement
+    local create_table_sql = string.format("CREATE TABLE IF NOT EXISTS %s (%s);", table_name, columns)
+
+    print("Create table " .. tostring(create_table_sql))
+
+    -- Conditionally construct the DROP TABLE statement
+    if reset then
+        local drop_table_sql = string.format("DROP TABLE IF EXISTS %s;", table_name)
+        create_table_sql = drop_table_sql .. create_table_sql
+    end
+
+    -- Add the FTS table and index if full-text search fields are provided
+    if #fts_fields > 0 then
+        local fts_table_sql = string.format([[
+            CREATE TABLE IF NOT EXISTS %s_fts (
+                id TEXT PRIMARY KEY,
+                %s_id TEXT REFERENCES %s(id),
+                document tsvector
+            );
+            CREATE INDEX IF NOT EXISTS idx_%s_fts_document ON %s_fts USING GIN(document);
+        ]], table_name, table_name, table_name, table_name, table_name)
+        create_table_sql = create_table_sql .. fts_table_sql
+    end
+
+    print("Create table fts" .. tostring(create_table_sql))
+
+    -- Execute the dynamic SQL
+    SPI.execute(create_table_sql)
+$$ LANGUAGE pllua;