[
  {
    "type": "add_column",
    "named": true,
    "fields": {},
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "column_definition",
          "named": true
        },
        {
          "type": "column_position",
          "named": true
        },
        {
          "type": "keyword_add",
          "named": true
        },
        {
          "type": "keyword_column",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        },
        {
          "type": "keyword_not",
          "named": true
        }
      ]
    }
  },
  {
    "type": "add_constraint",
    "named": true,
    "fields": {},
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "constraint",
          "named": true
        },
        {
          "type": "identifier",
          "named": true
        },
        {
          "type": "keyword_add",
          "named": true
        },
        {
          "type": "keyword_constraint",
          "named": true
        }
      ]
    }
  },
  {
    "type": "all_fields",
    "named": true,
    "fields": {},
    "children": {
      "multiple": false,
      "required": false,
      "types": [
        {
          "type": "object_reference",
          "named": true
        }
      ]
    }
  },
  {
    "type": "alter_column",
    "named": true,
    "fields": {
      "custom_type": {
        "multiple": false,
        "required": false,
        "types": [
          {
            "type": "object_reference",
            "named": true
          }
        ]
      },
      "name": {
        "multiple": false,
        "required": true,
        "types": [
          {
            "type": "identifier",
            "named": true
          }
        ]
      },
      "type": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "array_size_definition",
            "named": true
          },
          {
            "type": "bigint",
            "named": true
          },
          {
            "type": "binary",
            "named": true
          },
          {
            "type": "bit",
            "named": true
          },
          {
            "type": "char",
            "named": true
          },
          {
            "type": "decimal",
            "named": true
          },
          {
            "type": "double",
            "named": true
          },
          {
            "type": "enum",
            "named": true
          },
          {
            "type": "float",
            "named": true
          },
          {
            "type": "int",
            "named": true
          },
          {
            "type": "keyword_boolean",
            "named": true
          },
          {
            "type": "keyword_date",
            "named": true
          },
          {
            "type": "keyword_interval",
            "named": true
          },
          {
            "type": "keyword_json",
            "named": true
          },
          {
            "type": "keyword_string",
            "named": true
          },
          {
            "type": "keyword_xml",
            "named": true
          },
          {
            "type": "nchar",
            "named": true
          },
          {
            "type": "numeric",
            "named": true
          },
          {
            "type": "nvarchar",
            "named": true
          },
          {
            "type": "object_reference",
            "named": true
          },
          {
            "type": "smallint",
            "named": true
          },
          {
            "type": "time",
            "named": true
          },
          {
            "type": "timestamp",
            "named": true
          },
          {
            "type": "varbinary",
            "named": true
          },
          {
            "type": "varchar",
            "named": true
          }
        ]
      }
    },
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "array",
          "named": true
        },
        {
          "type": "between_expression",
          "named": true
        },
        {
          "type": "binary_expression",
          "named": true
        },
        {
          "type": "case",
          "named": true
        },
        {
          "type": "cast",
          "named": true
        },
        {
          "type": "datetime_value_function",
          "named": true
        },
        {
          "type": "exists",
          "named": true
        },
        {
          "type": "field",
          "named": true
        },
        {
          "type": "interval",
          "named": true
        },
        {
          "type": "invocation",
          "named": true
        },
        {
          "type": "keyword_alter",
          "named": true
        },
        {
          "type": "keyword_column",
          "named": true
        },
        {
          "type": "keyword_data",
          "named": true
        },
        {
          "type": "keyword_default",
          "named": true
        },
        {
          "type": "keyword_drop",
          "named": true
        },
        {
          "type": "keyword_not",
          "named": true
        },
        {
          "type": "keyword_null",
          "named": true
        },
        {
          "type": "keyword_set",
          "named": true
        },
        {
          "type": "keyword_type",
          "named": true
        },
        {
          "type": "like_expression",
          "named": true
        },
        {
          "type": "list",
          "named": true
        },
        {
          "type": "literal",
          "named": true
        },
        {
          "type": "parameter",
          "named": true
        },
        {
          "type": "parenthesized_expression",
          "named": true
        },
        {
          "type": "subquery",
          "named": true
        },
        {
          "type": "subscript",
          "named": true
        },
        {
          "type": "trim_expression",
          "named": true
        },
        {
          "type": "typed_temporal_literal",
          "named": true
        },
        {
          "type": "unary_expression",
          "named": true
        },
        {
          "type": "window_function",
          "named": true
        }
      ]
    }
  },
  {
    "type": "alter_database",
    "named": true,
    "fields": {
      "configuration_parameter": {
        "multiple": false,
        "required": false,
        "types": [
          {
            "type": "identifier",
            "named": true
          }
        ]
      }
    },
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "change_ownership",
          "named": true
        },
        {
          "type": "identifier",
          "named": true
        },
        {
          "type": "keyword_all",
          "named": true
        },
        {
          "type": "keyword_alter",
          "named": true
        },
        {
          "type": "keyword_database",
          "named": true
        },
        {
          "type": "keyword_reset",
          "named": true
        },
        {
          "type": "keyword_set",
          "named": true
        },
        {
          "type": "keyword_tablespace",
          "named": true
        },
        {
          "type": "keyword_with",
          "named": true
        },
        {
          "type": "rename_object",
          "named": true
        },
        {
          "type": "set_configuration",
          "named": true
        }
      ]
    }
  },
  {
    "type": "alter_index",
    "named": true,
    "fields": {
      "value": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      }
    },
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "identifier",
          "named": true
        },
        {
          "type": "keyword_alter",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        },
        {
          "type": "keyword_index",
          "named": true
        },
        {
          "type": "keyword_reset",
          "named": true
        },
        {
          "type": "keyword_set",
          "named": true
        },
        {
          "type": "keyword_tablespace",
          "named": true
        },
        {
          "type": "rename_object",
          "named": true
        }
      ]
    }
  },
  {
    "type": "alter_materialized_view",
    "named": true,
    "fields": {},
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "change_ownership",
          "named": true
        },
        {
          "type": "keyword_alter",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        },
        {
          "type": "keyword_materialized",
          "named": true
        },
        {
          "type": "keyword_view",
          "named": true
        },
        {
          "type": "object_reference",
          "named": true
        },
        {
          "type": "rename_object",
          "named": true
        },
        {
          "type": "set_schema",
          "named": true
        }
      ]
    }
  },
  {
    "type": "alter_role",
    "named": true,
    "fields": {
      "connection_limit": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      },
      "option": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "identifier",
            "named": true
          }
        ]
      },
      "password": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      },
      "valid_until": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      }
    },
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "identifier",
          "named": true
        },
        {
          "type": "keyword_all",
          "named": true
        },
        {
          "type": "keyword_alter",
          "named": true
        },
        {
          "type": "keyword_connection",
          "named": true
        },
        {
          "type": "keyword_database",
          "named": true
        },
        {
          "type": "keyword_encrypted",
          "named": true
        },
        {
          "type": "keyword_group",
          "named": true
        },
        {
          "type": "keyword_in",
          "named": true
        },
        {
          "type": "keyword_limit",
          "named": true
        },
        {
          "type": "keyword_null",
          "named": true
        },
        {
          "type": "keyword_password",
          "named": true
        },
        {
          "type": "keyword_reset",
          "named": true
        },
        {
          "type": "keyword_role",
          "named": true
        },
        {
          "type": "keyword_set",
          "named": true
        },
        {
          "type": "keyword_until",
          "named": true
        },
        {
          "type": "keyword_user",
          "named": true
        },
        {
          "type": "keyword_valid",
          "named": true
        },
        {
          "type": "keyword_with",
          "named": true
        },
        {
          "type": "rename_object",
          "named": true
        },
        {
          "type": "set_configuration",
          "named": true
        }
      ]
    }
  },
  {
    "type": "alter_schema",
    "named": true,
    "fields": {},
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "identifier",
          "named": true
        },
        {
          "type": "keyword_alter",
          "named": true
        },
        {
          "type": "keyword_owner",
          "named": true
        },
        {
          "type": "keyword_rename",
          "named": true
        },
        {
          "type": "keyword_schema",
          "named": true
        },
        {
          "type": "keyword_to",
          "named": true
        }
      ]
    }
  },
  {
    "type": "alter_sequence",
    "named": true,
    "fields": {
      "cache": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      },
      "custom_type": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "object_reference",
            "named": true
          }
        ]
      },
      "restart": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      },
      "start": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      }
    },
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "array_size_definition",
          "named": true
        },
        {
          "type": "bigint",
          "named": true
        },
        {
          "type": "binary",
          "named": true
        },
        {
          "type": "bit",
          "named": true
        },
        {
          "type": "change_ownership",
          "named": true
        },
        {
          "type": "char",
          "named": true
        },
        {
          "type": "decimal",
          "named": true
        },
        {
          "type": "double",
          "named": true
        },
        {
          "type": "enum",
          "named": true
        },
        {
          "type": "float",
          "named": true
        },
        {
          "type": "identifier",
          "named": true
        },
        {
          "type": "int",
          "named": true
        },
        {
          "type": "keyword_alter",
          "named": true
        },
        {
          "type": "keyword_as",
          "named": true
        },
        {
          "type": "keyword_boolean",
          "named": true
        },
        {
          "type": "keyword_by",
          "named": true
        },
        {
          "type": "keyword_cache",
          "named": true
        },
        {
          "type": "keyword_cycle",
          "named": true
        },
        {
          "type": "keyword_date",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        },
        {
          "type": "keyword_increment",
          "named": true
        },
        {
          "type": "keyword_interval",
          "named": true
        },
        {
          "type": "keyword_json",
          "named": true
        },
        {
          "type": "keyword_logged",
          "named": true
        },
        {
          "type": "keyword_maxvalue",
          "named": true
        },
        {
          "type": "keyword_minvalue",
          "named": true
        },
        {
          "type": "keyword_no",
          "named": true
        },
        {
          "type": "keyword_none",
          "named": true
        },
        {
          "type": "keyword_owned",
          "named": true
        },
        {
          "type": "keyword_restart",
          "named": true
        },
        {
          "type": "keyword_schema",
          "named": true
        },
        {
          "type": "keyword_sequence",
          "named": true
        },
        {
          "type": "keyword_set",
          "named": true
        },
        {
          "type": "keyword_start",
          "named": true
        },
        {
          "type": "keyword_string",
          "named": true
        },
        {
          "type": "keyword_unlogged",
          "named": true
        },
        {
          "type": "keyword_with",
          "named": true
        },
        {
          "type": "keyword_xml",
          "named": true
        },
        {
          "type": "literal",
          "named": true
        },
        {
          "type": "nchar",
          "named": true
        },
        {
          "type": "numeric",
          "named": true
        },
        {
          "type": "nvarchar",
          "named": true
        },
        {
          "type": "object_reference",
          "named": true
        },
        {
          "type": "rename_object",
          "named": true
        },
        {
          "type": "smallint",
          "named": true
        },
        {
          "type": "time",
          "named": true
        },
        {
          "type": "timestamp",
          "named": true
        },
        {
          "type": "varbinary",
          "named": true
        },
        {
          "type": "varchar",
          "named": true
        }
      ]
    }
  },
  {
    "type": "alter_table",
    "named": true,
    "fields": {},
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "add_column",
          "named": true
        },
        {
          "type": "add_constraint",
          "named": true
        },
        {
          "type": "alter_column",
          "named": true
        },
        {
          "type": "change_column",
          "named": true
        },
        {
          "type": "change_ownership",
          "named": true
        },
        {
          "type": "drop_column",
          "named": true
        },
        {
          "type": "drop_constraint",
          "named": true
        },
        {
          "type": "keyword_alter",
          "named": true
        },
        {
          "type": "keyword_disable",
          "named": true
        },
        {
          "type": "keyword_enable",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_force",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        },
        {
          "type": "keyword_level",
          "named": true
        },
        {
          "type": "keyword_no",
          "named": true
        },
        {
          "type": "keyword_only",
          "named": true
        },
        {
          "type": "keyword_row",
          "named": true
        },
        {
          "type": "keyword_security",
          "named": true
        },
        {
          "type": "keyword_table",
          "named": true
        },
        {
          "type": "modify_column",
          "named": true
        },
        {
          "type": "object_reference",
          "named": true
        },
        {
          "type": "rename_column",
          "named": true
        },
        {
          "type": "rename_object",
          "named": true
        },
        {
          "type": "set_schema",
          "named": true
        }
      ]
    }
  },
  {
    "type": "alter_type",
    "named": true,
    "fields": {
      "custom_type": {
        "multiple": false,
        "required": false,
        "types": [
          {
            "type": "object_reference",
            "named": true
          }
        ]
      }
    },
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "array_size_definition",
          "named": true
        },
        {
          "type": "bigint",
          "named": true
        },
        {
          "type": "binary",
          "named": true
        },
        {
          "type": "bit",
          "named": true
        },
        {
          "type": "change_ownership",
          "named": true
        },
        {
          "type": "char",
          "named": true
        },
        {
          "type": "decimal",
          "named": true
        },
        {
          "type": "double",
          "named": true
        },
        {
          "type": "enum",
          "named": true
        },
        {
          "type": "float",
          "named": true
        },
        {
          "type": "identifier",
          "named": true
        },
        {
          "type": "int",
          "named": true
        },
        {
          "type": "keyword_add",
          "named": true
        },
        {
          "type": "keyword_after",
          "named": true
        },
        {
          "type": "keyword_alter",
          "named": true
        },
        {
          "type": "keyword_attribute",
          "named": true
        },
        {
          "type": "keyword_before",
          "named": true
        },
        {
          "type": "keyword_boolean",
          "named": true
        },
        {
          "type": "keyword_cascade",
          "named": true
        },
        {
          "type": "keyword_collate",
          "named": true
        },
        {
          "type": "keyword_data",
          "named": true
        },
        {
          "type": "keyword_date",
          "named": true
        },
        {
          "type": "keyword_drop",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        },
        {
          "type": "keyword_interval",
          "named": true
        },
        {
          "type": "keyword_json",
          "named": true
        },
        {
          "type": "keyword_not",
          "named": true
        },
        {
          "type": "keyword_rename",
          "named": true
        },
        {
          "type": "keyword_restrict",
          "named": true
        },
        {
          "type": "keyword_set",
          "named": true
        },
        {
          "type": "keyword_string",
          "named": true
        },
        {
          "type": "keyword_to",
          "named": true
        },
        {
          "type": "keyword_type",
          "named": true
        },
        {
          "type": "keyword_value",
          "named": true
        },
        {
          "type": "keyword_xml",
          "named": true
        },
        {
          "type": "literal",
          "named": true
        },
        {
          "type": "nchar",
          "named": true
        },
        {
          "type": "numeric",
          "named": true
        },
        {
          "type": "nvarchar",
          "named": true
        },
        {
          "type": "rename_object",
          "named": true
        },
        {
          "type": "set_schema",
          "named": true
        },
        {
          "type": "smallint",
          "named": true
        },
        {
          "type": "time",
          "named": true
        },
        {
          "type": "timestamp",
          "named": true
        },
        {
          "type": "varbinary",
          "named": true
        },
        {
          "type": "varchar",
          "named": true
        }
      ]
    }
  },
  {
    "type": "alter_view",
    "named": true,
    "fields": {},
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "change_ownership",
          "named": true
        },
        {
          "type": "cte",
          "named": true
        },
        {
          "type": "from",
          "named": true
        },
        {
          "type": "keyword_alter",
          "named": true
        },
        {
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          "type": "keyword_json",
          "named": true
        },
        {
          "type": "keyword_string",
          "named": true
        },
        {
          "type": "keyword_xml",
          "named": true
        },
        {
          "type": "nchar",
          "named": true
        },
        {
          "type": "numeric",
          "named": true
        },
        {
          "type": "nvarchar",
          "named": true
        },
        {
          "type": "smallint",
          "named": true
        },
        {
          "type": "time",
          "named": true
        },
        {
          "type": "timestamp",
          "named": true
        },
        {
          "type": "varbinary",
          "named": true
        },
        {
          "type": "varchar",
          "named": true
        }
      ]
    }
  },
  {
    "type": "change_column",
    "named": true,
    "fields": {
      "old_name": {
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        "required": true,
        "types": [
          {
            "type": "identifier",
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          }
        ]
      }
    },
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      "required": true,
      "types": [
        {
          "type": "column_definition",
          "named": true
        },
        {
          "type": "column_position",
          "named": true
        },
        {
          "type": "keyword_change",
          "named": true
        },
        {
          "type": "keyword_column",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        }
      ]
    }
  },
  {
    "type": "change_ownership",
    "named": true,
    "fields": {},
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "identifier",
          "named": true
        },
        {
          "type": "keyword_owner",
          "named": true
        },
        {
          "type": "keyword_to",
          "named": true
        }
      ]
    }
  },
  {
    "type": "char",
    "named": true,
    "fields": {
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        "multiple": false,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      }
    },
    "children": {
      "multiple": false,
      "required": true,
      "types": [
        {
          "type": "keyword_char",
          "named": true
        }
      ]
    }
  },
  {
    "type": "column",
    "named": true,
    "fields": {
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        "multiple": false,
        "required": false,
        "types": [
          {
            "type": "identifier",
            "named": true
          },
          {
            "type": "literal",
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          }
        ]
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    },
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      "required": false,
      "types": [
        {
          "type": "direction",
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        },
        {
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        },
        {
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          "named": true
        }
      ]
    }
  },
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        "types": [
          {
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        "required": true,
        "types": [
          {
            "type": "identifier",
            "named": true
          },
          {
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        "required": true,
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          {
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          },
          {
            "type": "binary",
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          },
          {
            "type": "bit",
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          },
          {
            "type": "char",
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          },
          {
            "type": "decimal",
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          },
          {
            "type": "double",
            "named": true
          },
          {
            "type": "enum",
            "named": true
          },
          {
            "type": "float",
            "named": true
          },
          {
            "type": "int",
            "named": true
          },
          {
            "type": "keyword_boolean",
            "named": true
          },
          {
            "type": "keyword_date",
            "named": true
          },
          {
            "type": "keyword_interval",
            "named": true
          },
          {
            "type": "keyword_json",
            "named": true
          },
          {
            "type": "keyword_string",
            "named": true
          },
          {
            "type": "keyword_xml",
            "named": true
          },
          {
            "type": "nchar",
            "named": true
          },
          {
            "type": "numeric",
            "named": true
          },
          {
            "type": "nvarchar",
            "named": true
          },
          {
            "type": "object_reference",
            "named": true
          },
          {
            "type": "smallint",
            "named": true
          },
          {
            "type": "time",
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          },
          {
            "type": "timestamp",
            "named": true
          },
          {
            "type": "varbinary",
            "named": true
          },
          {
            "type": "varchar",
            "named": true
          }
        ]
      }
    },
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      "required": false,
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          "type": "array",
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        },
        {
          "type": "between_expression",
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        },
        {
          "type": "binary_expression",
          "named": true
        },
        {
          "type": "case",
          "named": true
        },
        {
          "type": "cast",
          "named": true
        },
        {
          "type": "datetime_value_function",
          "named": true
        },
        {
          "type": "direction",
          "named": true
        },
        {
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        },
        {
          "type": "field",
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        },
        {
          "type": "identifier",
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        {
          "type": "interval",
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        },
        {
          "type": "invocation",
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        },
        {
          "type": "keyword_action",
          "named": true
        },
        {
          "type": "keyword_always",
          "named": true
        },
        {
          "type": "keyword_as",
          "named": true
        },
        {
          "type": "keyword_cascade",
          "named": true
        },
        {
          "type": "keyword_check",
          "named": true
        },
        {
          "type": "keyword_comment",
          "named": true
        },
        {
          "type": "keyword_constraint",
          "named": true
        },
        {
          "type": "keyword_current_timestamp",
          "named": true
        },
        {
          "type": "keyword_default",
          "named": true
        },
        {
          "type": "keyword_delete",
          "named": true
        },
        {
          "type": "keyword_generated",
          "named": true
        },
        {
          "type": "keyword_key",
          "named": true
        },
        {
          "type": "keyword_no",
          "named": true
        },
        {
          "type": "keyword_not",
          "named": true
        },
        {
          "type": "keyword_null",
          "named": true
        },
        {
          "type": "keyword_on",
          "named": true
        },
        {
          "type": "keyword_primary",
          "named": true
        },
        {
          "type": "keyword_references",
          "named": true
        },
        {
          "type": "keyword_restrict",
          "named": true
        },
        {
          "type": "keyword_set",
          "named": true
        },
        {
          "type": "keyword_unique",
          "named": true
        },
        {
          "type": "keyword_update",
          "named": true
        },
        {
          "type": "like_expression",
          "named": true
        },
        {
          "type": "list",
          "named": true
        },
        {
          "type": "literal",
          "named": true
        },
        {
          "type": "object_reference",
          "named": true
        },
        {
          "type": "parameter",
          "named": true
        },
        {
          "type": "parenthesized_expression",
          "named": true
        },
        {
          "type": "subquery",
          "named": true
        },
        {
          "type": "subscript",
          "named": true
        },
        {
          "type": "trim_expression",
          "named": true
        },
        {
          "type": "typed_temporal_literal",
          "named": true
        },
        {
          "type": "unary_expression",
          "named": true
        },
        {
          "type": "window_function",
          "named": true
        }
      ]
    }
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    "type": "column_definitions",
    "named": true,
    "fields": {},
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      "required": true,
      "types": [
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          "type": "column_definition",
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        },
        {
          "type": "constraints",
          "named": true
        }
      ]
    }
  },
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    "type": "column_position",
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    "fields": {
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        "required": false,
        "types": [
          {
            "type": "identifier",
            "named": true
          }
        ]
      }
    },
    "children": {
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      "required": true,
      "types": [
        {
          "type": "keyword_after",
          "named": true
        },
        {
          "type": "keyword_first",
          "named": true
        }
      ]
    }
  },
  {
    "type": "constraint",
    "named": true,
    "fields": {
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        "required": false,
        "types": [
          {
            "type": "identifier",
            "named": true
          }
        ]
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        },
        {
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        },
        {
          "type": "keyword_action",
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        },
        {
          "type": "keyword_cascade",
          "named": true
        },
        {
          "type": "keyword_check",
          "named": true
        },
        {
          "type": "keyword_constraint",
          "named": true
        },
        {
          "type": "keyword_default",
          "named": true
        },
        {
          "type": "keyword_delete",
          "named": true
        },
        {
          "type": "keyword_distinct",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_foreign",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        },
        {
          "type": "keyword_index",
          "named": true
        },
        {
          "type": "keyword_key",
          "named": true
        },
        {
          "type": "keyword_no",
          "named": true
        },
        {
          "type": "keyword_not",
          "named": true
        },
        {
          "type": "keyword_null",
          "named": true
        },
        {
          "type": "keyword_nulls",
          "named": true
        },
        {
          "type": "keyword_on",
          "named": true
        },
        {
          "type": "keyword_primary",
          "named": true
        },
        {
          "type": "keyword_references",
          "named": true
        },
        {
          "type": "keyword_restrict",
          "named": true
        },
        {
          "type": "keyword_set",
          "named": true
        },
        {
          "type": "keyword_unique",
          "named": true
        },
        {
          "type": "keyword_update",
          "named": true
        },
        {
          "type": "literal",
          "named": true
        },
        {
          "type": "object_reference",
          "named": true
        },
        {
          "type": "ordered_columns",
          "named": true
        }
      ]
    }
  },
  {
    "type": "constraints",
    "named": true,
    "fields": {},
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "constraint",
          "named": true
        }
      ]
    }
  },
  {
    "type": "create_database",
    "named": true,
    "fields": {
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        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "identifier",
            "named": true
          }
        ]
      },
      "value": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "identifier",
            "named": true
          },
          {
            "type": "literal",
            "named": true
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    "children": {
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      "required": true,
      "types": [
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          "type": "identifier",
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        },
        {
          "type": "keyword_create",
          "named": true
        },
        {
          "type": "keyword_database",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        },
        {
          "type": "keyword_not",
          "named": true
        },
        {
          "type": "keyword_with",
          "named": true
        }
      ]
    }
  },
  {
    "type": "create_function",
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    "fields": {
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        "required": false,
        "types": [
          {
            "type": "object_reference",
            "named": true
          }
        ]
      }
    },
    "children": {
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        {
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        },
        {
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        },
        {
          "type": "bit",
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        },
        {
          "type": "char",
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        },
        {
          "type": "column_definitions",
          "named": true
        },
        {
          "type": "decimal",
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        },
        {
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        },
        {
          "type": "enum",
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        },
        {
          "type": "float",
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        {
          "type": "function_arguments",
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        },
        {
          "type": "function_body",
          "named": true
        },
        {
          "type": "function_cost",
          "named": true
        },
        {
          "type": "function_language",
          "named": true
        },
        {
          "type": "function_leakproof",
          "named": true
        },
        {
          "type": "function_rows",
          "named": true
        },
        {
          "type": "function_safety",
          "named": true
        },
        {
          "type": "function_security",
          "named": true
        },
        {
          "type": "function_strictness",
          "named": true
        },
        {
          "type": "function_support",
          "named": true
        },
        {
          "type": "function_volatility",
          "named": true
        },
        {
          "type": "int",
          "named": true
        },
        {
          "type": "keyword_boolean",
          "named": true
        },
        {
          "type": "keyword_create",
          "named": true
        },
        {
          "type": "keyword_date",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_function",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        },
        {
          "type": "keyword_interval",
          "named": true
        },
        {
          "type": "keyword_json",
          "named": true
        },
        {
          "type": "keyword_not",
          "named": true
        },
        {
          "type": "keyword_or",
          "named": true
        },
        {
          "type": "keyword_replace",
          "named": true
        },
        {
          "type": "keyword_returns",
          "named": true
        },
        {
          "type": "keyword_setof",
          "named": true
        },
        {
          "type": "keyword_string",
          "named": true
        },
        {
          "type": "keyword_table",
          "named": true
        },
        {
          "type": "keyword_trigger",
          "named": true
        },
        {
          "type": "keyword_xml",
          "named": true
        },
        {
          "type": "nchar",
          "named": true
        },
        {
          "type": "numeric",
          "named": true
        },
        {
          "type": "nvarchar",
          "named": true
        },
        {
          "type": "object_reference",
          "named": true
        },
        {
          "type": "smallint",
          "named": true
        },
        {
          "type": "time",
          "named": true
        },
        {
          "type": "timestamp",
          "named": true
        },
        {
          "type": "varbinary",
          "named": true
        },
        {
          "type": "varchar",
          "named": true
        }
      ]
    }
  },
  {
    "type": "create_procedure",
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    "fields": {},
    "children": {
      "multiple": true,
      "required": true,
      "types": [
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          "type": "function_arguments",
          "named": true
        },
        {
          "type": "function_language",
          "named": true
        },
        {
          "type": "function_safety",
          "named": true
        },
        {
          "type": "function_security",
          "named": true
        },
        {
          "type": "identifier",
          "named": true
        },
        {
          "type": "keyword_create",
          "named": true
        },
        {
          "type": "keyword_definer",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        },
        {
          "type": "keyword_not",
          "named": true
        },
        {
          "type": "keyword_or",
          "named": true
        },
        {
          "type": "keyword_procedure",
          "named": true
        },
        {
          "type": "keyword_replace",
          "named": true
        },
        {
          "type": "object_reference",
          "named": true
        },
        {
          "type": "procedure_body",
          "named": true
        }
      ]
    }
  },
  {
    "type": "create_query",
    "named": true,
    "fields": {},
    "children": {
      "multiple": true,
      "required": true,
      "types": [
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          "type": "cte",
          "named": true
        },
        {
          "type": "from",
          "named": true
        },
        {
          "type": "keyword_into",
          "named": true
        },
        {
          "type": "keyword_recursive",
          "named": true
        },
        {
          "type": "keyword_with",
          "named": true
        },
        {
          "type": "select",
          "named": true
        },
        {
          "type": "select_expression",
          "named": true
        },
        {
          "type": "set_operation",
          "named": true
        }
      ]
    }
  },
  {
    "type": "create_role",
    "named": true,
    "fields": {
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        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      },
      "option": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "identifier",
            "named": true
          }
        ]
      },
      "password": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      },
      "valid_until": {
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        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      }
    },
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "identifier",
          "named": true
        },
        {
          "type": "keyword_admin",
          "named": true
        },
        {
          "type": "keyword_connection",
          "named": true
        },
        {
          "type": "keyword_create",
          "named": true
        },
        {
          "type": "keyword_encrypted",
          "named": true
        },
        {
          "type": "keyword_group",
          "named": true
        },
        {
          "type": "keyword_in",
          "named": true
        },
        {
          "type": "keyword_limit",
          "named": true
        },
        {
          "type": "keyword_null",
          "named": true
        },
        {
          "type": "keyword_password",
          "named": true
        },
        {
          "type": "keyword_role",
          "named": true
        },
        {
          "type": "keyword_until",
          "named": true
        },
        {
          "type": "keyword_user",
          "named": true
        },
        {
          "type": "keyword_valid",
          "named": true
        },
        {
          "type": "keyword_with",
          "named": true
        }
      ]
    }
  },
  {
    "type": "create_schema",
    "named": true,
    "fields": {},
    "children": {
      "multiple": true,
      "required": true,
      "types": [
        {
          "type": "identifier",
          "named": true
        },
        {
          "type": "keyword_authorization",
          "named": true
        },
        {
          "type": "keyword_create",
          "named": true
        },
        {
          "type": "keyword_exists",
          "named": true
        },
        {
          "type": "keyword_if",
          "named": true
        },
        {
          "type": "keyword_not",
          "named": true
        },
        {
          "type": "keyword_schema",
          "named": true
        }
      ]
    }
  },
  {
    "type": "create_sequence",
    "named": true,
    "fields": {
      "cache": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
          }
        ]
      },
      "custom_type": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "object_reference",
            "named": true
          }
        ]
      },
      "increment": {
        "multiple": true,
        "required": false,
        "types": [
          {
            "type": "literal",
            "named": true
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          "type": "keyword_transaction",
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        {
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        {
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          "type": "delete",
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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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        {
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        {
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        {
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        {
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        {
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          "type": "refresh_materialized_view",
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        {
          "type": "release_savepoint_statement",
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        {
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        {
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      ]
    }
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  {
    "type": "keyword_authorization",
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    "type": "keyword_language",
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    "type": "keyword_system",
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    "type": "keyword_table",
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    "type": "keyword_tablesample",
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    "type": "keyword_tablespace",
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    "type": "keyword_temporary",
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    "type": "keyword_time",
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    "type": "keyword_timestamp",
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  {
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    "type": "keyword_trailing",
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    "type": "keyword_transaction",
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    "type": "keyword_trigger",
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    "type": "keyword_trim",
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    "type": "keyword_true",
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    "type": "keyword_truncate",
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  {
    "type": "keyword_type",
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    "type": "keyword_unbounded",
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    "type": "keyword_uncommitted",
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    "type": "keyword_union",
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    "type": "keyword_unique",
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    "type": "keyword_unlogged",
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  {
    "type": "keyword_unsafe",
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  {
    "type": "keyword_until",
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  {
    "type": "keyword_update",
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  {
    "type": "keyword_usage",
    "named": true
  },
  {
    "type": "keyword_user",
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  {
    "type": "keyword_using",
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  {
    "type": "keyword_valid",
    "named": true
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  {
    "type": "keyword_value",
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    "type": "keyword_values",
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  },
  {
    "type": "keyword_varbinary",
    "named": true
  },
  {
    "type": "keyword_variadic",
    "named": true
  },
  {
    "type": "keyword_varying",
    "named": true
  },
  {
    "type": "keyword_view",
    "named": true
  },
  {
    "type": "keyword_volatile",
    "named": true
  },
  {
    "type": "keyword_wait",
    "named": true
  },
  {
    "type": "keyword_when",
    "named": true
  },
  {
    "type": "keyword_where",
    "named": true
  },
  {
    "type": "keyword_window",
    "named": true
  },
  {
    "type": "keyword_with",
    "named": true
  },
  {
    "type": "keyword_within",
    "named": true
  },
  {
    "type": "keyword_without",
    "named": true
  },
  {
    "type": "keyword_work",
    "named": true
  },
  {
    "type": "keyword_write",
    "named": true
  },
  {
    "type": "keyword_xml",
    "named": true
  },
  {
    "type": "keyword_zone",
    "named": true
  },
  {
    "type": "marginalia",
    "named": true,
    "extra": true
  },
  {
    "type": "op_other",
    "named": true
  },
  {
    "type": "op_unary_other",
    "named": true
  },
  {
    "type": "parameter",
    "named": true
  }
]