Ensure that for empty default date fields there is no default

Author: wojtekn

wp-includes/sqlite/class-wp-sqlite-translator.php

@@ -3352,16 +3352,14 @@ private function execute_show() {
 
 				foreach ( $columns as $column ) {
 					$column      = (array) $column;
+					$mysql_type = $this->get_cached_mysql_data_type( $table_name, $column['Field'] );
 					$definition  = '';
 					$definition .= '`' . $column['Field'] . '` ';
-					$definition .= $this->get_cached_mysql_data_type(
-						$table_name,
-						$column['Field']
-					) ?? $column['Type'];
+					$definition .= $mysql_type ?? $column['Type'];
 					$definition .= 'PRI' === $column['Key'] ? ' PRIMARY KEY' : '';
 					$definition .= 'PRI' === $column['Key'] && 'INTEGER' === $column['Type'] ? ' AUTO_INCREMENT' : '';
 					$definition .= 'NO' === $column['Null'] ? ' NOT NULL' : '';
-					$definition .= $column['Default'] ? ' DEFAULT ' . $column['Default'] : '';
+					$definition .= $this->get_column_default( $column, $mysql_type );
 					$entries[]   = $definition;
 				}
 				foreach ( $keys as $key ) {
@@ -3533,6 +3531,21 @@ function ( $row ) use ( $name_map ) {
 		return $columns;
 	}
 
+	/**
+	 * Gets the column default.
+	 *
+	 * @param array $column The table column
+	 *
+	 * @return string Prepared default value for the column.
+	 */
+	private function get_column_default( $column, $mysql_type )  {
+		if ( $column['Default'] && ! in_array( strtolower( $mysql_type ), array( 'datetime', 'date', 'time', 'timestamp', 'year' ), true ) ) {
+			return ' DEFAULT ' . $column['Default'];
+		} else {
+			return '';
+		}
+	}
+
 	/**
 	 * Consumes data types from the query.
 	 *