schemas/util.sql: explain(): support running in verbose mode

bugfix: schemas/util.sql: check_constraint_replace(): need to canon the expr, using new util.canon_sql(), so it can be compared with the expr in the DB

schemas/util.sql: added canon_sql(expr text, table_ regclass)

fix: schemas/util.sql: check_constraint view: don't use pretty-print mode, because this format does not match util.canon_sql()

fix: schemas/util.sql: check_constraint_expr_enable(), derived_col_expr_from_check_constraint(): trim parens in order to support non-pretty-print mode, which is needed with canon_sql()

schemas/util.sql: added canon_sql(expr text)

schemas/util.sql: added trim_parens()

schemas/util.sql: added copy_struct(from_ regtype, to_ text) and copy_data(from_ regtype, to_ text), and use these in a general-purpose copy()

bugfix: schemas/util.sql: copy(from_ regtype, to_ text): must be declared STRICT to handle NULL properly

schemas/util.sql: added copy(from_ regtype, to_ text)

fix: schemas/util.sql: is_raise_condition(): should be called is_log_level()

schemas/util.sql: raise(): support SQLSTATE values

bugfix: schemas/util.sql: raise_expr(raise_type): only treat as raise condition if not SQLSTATE, to allow custom SQLSTATEs

schemas/util.sql: raise(): support SQLSTATE values

schemas/util.sql: added raise_expr(raise_type)

schemas/util.sql: added is_raise_condition()

schemas/util.sql: added is_sqlstate()

schemas/util.sql: typeof(expr text, table_ regtype): use simpler util.eval2val() instead of EXECUTE

fix: schemas/util.sql: derived_col_constraint_initially_enabled(): also should be initially enabled if expr unchanged, to avoid re-running constraint on all rows

schemas/util.sql: derived_col_update(): use new util.derived_col_constraint_initially_enabled()

schemas/util.sql: added derived_col_constraint_initially_enabled()

schemas/util.sql: added derived_col_expr(col)

derived_col_constraint_enable(): documented that this now avoids re-running constraint on all rows if already enabled

fix: check_constraint_replace(): avoid re-running the constraint on all rows if expr hasn't changed

schemas/util.sql: check_constraint_replace(): shortened param to `def` for readability

schemas/util.sql: added check_constraint_expr(constraint_ table_item)

schemas/util.sql: added derived_col_update()

schemas/util.sql: check_constraint__disabled(): made disabled configurable (renaming func to check_constraint())

schemas/util.sql: added derived_col_constraint_expr()

schemas/util.sql: derived_col_constraints_enable(): use new derived_col_constraint_enable()

schemas/util.sql: added derived_col_constraint_enable()

schemas/util.sql: added table_has_data()

schemas/util.sql: added col_add(derived_col_def)

schemas/util.sql: added typeof(text, regclass)

schemas/util.sql: added regtype(regclass)

schemas/util.sql: added col_add()

schemas/util.sql: added col_def type

schemas/util.sql: derived_cols_populate(): only run if needed

schemas/util.sql: added derived_cols_populated()

schemas/util.sql: added derived_cols_populated()

schemas/util.sql: added derived_col_populated()

schemas/util.sql: added check_constraint_enabled()

schemas/util.sql: remove_prefix(), remove_suffix(): use new starts_with(), ends_with()

schemas/util.sql: added starts_with(), ends_with()

schemas/util.sql: derived_cols_populate(): also run util.derived_col_constraints_enable() once populated

schemas/util.sql: added derived_col_constraints_enable()

schemas/util.sql: added check_constraint__disabled(), which creates a CHECK constraint which is initially disabled

schemas/util.sql: added check_constraint__disabled(), which creates a CHECK constraint which is initially disabled

fix: schemas/util.sql: run_triggers(): need to re-sort rows if table needs this

schemas/util.sql: added try_cluster()

schemas/util.sql: added derived_cols_populate()

schemas/util.sql: added run_triggers(regclass)

schemas/util.sql: added first_col(regclass)

fix: schemas/util.sql: read-only functions should be STABLE rather than VOLATILE

bugfix: schemas/util.sql: functions that access the DB must be STABLE rather than IMMUTABLE

bugfix: schemas/util.sql: derived_col_defs(): derived columns must be returned in table order (which should = dependency order), so that they are populated in dependency order

bugfix: schemas/util.sql: remove_prefix(), remove_suffix(): must be declared STRICT to handle NULL properly

bugfix: schemas/util.sql: remove_suffix(): need to use quote_nullable(str) so a NULL str doesn't NULL out the entire message

bugfix: schemas/util.sql: remove_prefix(): need to use quote_nullable(str) so a NULL str doesn't NULL out the entire message

bugfix: schemas/util.sql: raise(): use new quote_as_str() to avoid "RAISE statement option cannot be null" errors

schemas/util.sql: added quote_as_str()

schemas/util.sql: added CAST (util.col AS util.derived_col_def)

schemas/util.sql: derived_col_def(col): use existing util.check_constraint_def()

schemas/util.sql: added CAST (util.col AS util.table_item)

schemas/util.sql: added derived_col_def(col)

schemas/util.sql: added check_constraint_disable()

bugfix: schemas/util.sql: check_constraint_drop(): need IF EXISTS

schemas/util.sql: added check_constraint_expr_disable()

schemas/util.sql: check_constraint_enable(): documented that this is idempotent

inputs/.TNRS/schema.sql: taxon_match: documented that whenever columns are renamed, util.derived_cols_sync() should be run

schemas/util.sql: derived_cols_sync(): also create trigger, since this is necessary for a complete sync

schemas/util.sql: added name(regprocedure)

schemas/util.sql: derived_cols_sync(): set the trigger name in a var

schemas/util.sql: added check_constraint_enable()

schemas/util.sql: added check_constraint_replace()

schemas/util.sql: added CAST (util.table_item AS util.check_constraint_def)

schemas/util.sql: added check_constraint_drop()

schemas/util.sql: derived_col_expr_from_check_constraint(): enable initially-disabled exprs

schemas/util.sql: added check_constraint_expr_enable()

fix: schemas/util.sql: check_constraint view: def: use pg_get_expr() with pretty-print, to avoid extra () that complicate parsing

inputs/.TNRS/schema.sql: taxon_match__fill_derived(): updated using new util.derived_cols_sync()

schemas/util.sql: added derived_cols_sync()

bugfix: CAST (util.check_constraint_def AS util.derived_col_def): need to extract the derived column expr from the CHECK constraint expr

schemas/util.sql: added derived_col_expr_from_check_constraint()

schemas/util.sql: added extract_str()

schemas/util.sql: added remove_suffix()

schemas/util.sql: added remove_prefix()

schemas/util.sql: added CAST (util.table_item AS util.col)

schemas/util.sql: derived_col_defs(): return derived_col_def instead of check_constraint_def

schemas/util.sql: added derived_col_def type with cast from util.check_constraint_def

schemas/util.sql: added derived_col_defs()

schemas/util.sql: check_constraint_defs(): use new util.check_constraint view

schemas/util.sql: added check_constraint view

schemas/util.sql: added check_constraint_defs()

schemas/util.sql: added check_constraint_def type

schemas/util.sql: added table_item type

schemas/util.sql: col_ref: renamed to just col

fix: inputs/.TNRS/schema.sql: taxon_match: to populate a new column: also need to recluster table so rows are exported in sorted order

schemas/util.sql: cluster(): support omitting index to recluster a table

schemas/util.sql: cluster_once(): use util.cluster()