feat: basic firebird analyser

plugins/dbgate-plugin-firebird/src/backend/sql/columns.js

@@ -0,0 +1,43 @@
+module.exports = `
+SELECT DISTINCT
+    CAST(TRIM(rf.rdb$relation_name) AS VARCHAR(255)) AS tableName,
+    CAST(TRIM(rf.rdb$field_name) AS VARCHAR(255)) AS columnName,
+    CASE rf.rdb$null_flag WHEN 1 THEN FALSE ELSE TRUE END AS notNull,
+    CASE
+        WHEN EXISTS (
+            SELECT 1
+            FROM rdb$relation_constraints rc
+            JOIN rdb$index_segments idx ON rc.rdb$index_name = idx.rdb$index_name
+            WHERE rc.rdb$relation_name = rf.rdb$relation_name
+              AND idx.rdb$field_name = rf.rdb$field_name
+              AND rc.rdb$constraint_type = 'PRIMARY KEY'
+        ) THEN TRUE
+        ELSE FALSE
+    END AS isPrimaryKey,
+    f.rdb$field_type AS dataTypeCode,
+    f.rdb$field_precision AS numberprecision,
+    f.rdb$field_scale AS scale,
+    f.rdb$field_length AS length,
+    CAST(TRIM(rf.rdb$default_value) AS VARCHAR(255)) AS defaultValue,
+    CAST(TRIM(rf.rdb$description) AS VARCHAR(255)) AS columnComment,
+    CASE
+        WHEN f.rdb$field_type IN (8, 9, 16) AND f.rdb$field_scale < 0 THEN TRUE
+        ELSE FALSE
+    END AS isUnsigned,
+    CAST(TRIM(rf.rdb$field_name) AS VARCHAR(255)) AS pureName,
+    CAST(TRIM(r.rdb$owner_name) AS VARCHAR(255)) AS schemaName
+FROM
+    rdb$relation_fields rf
+JOIN
+    rdb$relations r ON rf.rdb$relation_name = r.rdb$relation_name
+LEFT JOIN
+    rdb$fields f ON rf.rdb$field_source = f.rdb$field_name
+LEFT JOIN
+    rdb$character_sets cs ON f.rdb$character_set_id = cs.rdb$character_set_id
+LEFT JOIN
+    rdb$collations co ON f.rdb$collation_id = co.rdb$collation_id
+WHERE
+    r.rdb$system_flag = 0
+ORDER BY
+    tableName, rf.rdb$field_position;
+`;

plugins/dbgate-plugin-firebird/src/backend/sql/index.js

@@ -0,0 +1,9 @@
+const version = require('./version');
+const tables = require('./tables');
+const columns = require('./columns');
+
+module.exports = {
+  version,
+  columns,
+  tables,
+};

plugins/dbgate-plugin-firebird/src/backend/sql/tables.js

@@ -0,0 +1,9 @@
+module.exports = `
+SELECT
+    TRIM(RDB$RELATION_NAME) AS pureName,
+    RDB$DESCRIPTION AS objectComment,
+    RDB$FORMAT AS objectTypeField
+FROM RDB$RELATIONS
+WHERE RDB$SYSTEM_FLAG = 0 -- only user-defined tables
+ORDER BY pureName;
+`;

plugins/dbgate-plugin-firebird/src/backend/sql/version.js

@@ -0,0 +1 @@
+module.exports = `SELECT rdb$get_context('SYSTEM', 'ENGINE_VERSION') as version from rdb$database;`;