Refactor test of columns (#317)

Author: Tigrov

CHANGELOG.md

@@ -19,7 +19,7 @@
 - Bug #285: Fix `DMLQueryBuilder::insertBatch()` method (@Tigrov)
 - Enh #283: Refactor `Dsn` class (@Tigrov)
 - Enh #286: Use constructor to create columns and initialize properties (@Tigrov)
-- Enh #288: Refactor `Schema::findColumns()` method (@Tigrov)
+- Enh #288, #317: Refactor `Schema::findColumns()` method (@Tigrov)
 - Enh #289: Refactor `Schema::normalizeDefaultValue()` method and move it to `ColumnFactory` class (@Tigrov)
 - New #292: Override `QueryBuilder::prepareBinary()` method (@Tigrov)
 - Chg #294: Update `QueryBuilder` constructor (@Tigrov)

src/Schema.php

@@ -337,7 +337,9 @@ protected function findColumns(TableSchemaInterface $table): bool
                 AND ACC2.COLUMN_NAME != ACC.COLUMN_NAME
             WHERE AC.OWNER = :schemaName2
                 AND AC.TABLE_NAME = :tableName2
-                AND (AC.CONSTRAINT_TYPE = 'P' OR AC.CONSTRAINT_TYPE IN ('U', 'C') AND ACC2.COLUMN_NAME IS NULL)
+                AND (AC.CONSTRAINT_TYPE = 'P'
+                    OR AC.CONSTRAINT_TYPE = 'U' AND ACC2.COLUMN_NAME IS NULL
+                    OR AC.CONSTRAINT_TYPE = 'C' AND ACC2.COLUMN_NAME IS NULL AND AC.SEARCH_CONDITION_VC != '"' || ACC.COLUMN_NAME || '" IS NOT NULL')
         )
         SELECT
             A.COLUMN_NAME,